Question 1

Key Advantages:

✓
                                Low odor and environmentally friendly

✓
                                Smooth application and fast drying

✓
                                Excellent adhesion and durability

✓
                                Consistent finish quality with easy cleanup

To achieve these advantages, modern paints rely on advanced rheology modifiers — and HEC is the leading solution for balancing viscosity and workability.

Eco
                                    Friendly

Water
                                    Based

Fast
                                    Drying

/* LANDU HEC for Emulsion Paint Hero Section */
.hec-paint-hero-section {
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 50%, #f8fafc 100%);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.hec-paint-hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 15% 20%, rgba(59, 130, 246, 0.04) 0%, transparent 50%),
        radial-gradient(circle at 85% 80%, rgba(14, 165, 233, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

.hec-paint-hero-section .content-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
    position: relative;
    z-index: 1;
}

/* Hero Header */
.hec-paint-hero-header {
    text-align: center;
    margin-bottom: 80px;
}

.hec-paint-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    padding: 12px 28px;
    border-radius: 50px;
    margin-bottom: 28px;
    border: 2px solid rgba(59, 130, 246, 0.2);
}

.hec-paint-hero-badge-icon {
    font-size: 1.3rem;
}

.hec-paint-hero-badge-text {
    font-size: 0.95rem;
    font-weight: 700;
    color: #1e40af;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hec-paint-hero-title {
    font-size: 3.2rem;
    font-weight: 800;
    color: #0f172a;
    margin: 0 0 20px 0;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hec-paint-hero-subtitle {
    font-size: 1.3rem;
    font-weight: 600;
    background: linear-gradient(135deg, #3b82f6, #0ea5e9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    line-height: 1.5;
}

/* Main Section */
.hec-paint-main-section {
    margin-bottom: 80px;
}

.hec-paint-main-grid {
    display: grid;
    grid-template-columns: 50% 50%;
    gap: 60px;
    align-items: center;
}

/* Left: Content */
.hec-paint-main-content {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.hec-paint-content-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    padding: 10px 24px;
    border-radius: 50px;
    border: 2px solid rgba(59, 130, 246, 0.2);
    width: fit-content;
}

.hec-paint-content-badge-icon {
    font-size: 1.2rem;
}

.hec-paint-content-badge-text {
    font-size: 0.9rem;
    font-weight: 700;
    color: #1e40af;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hec-paint-intro-box {
    background: white;
    border: 2px solid rgba(59, 130, 246, 0.15);
    border-radius: 24px;
    padding: 32px;
    box-shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
}

.hec-paint-intro-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 2px solid rgba(148, 163, 184, 0.1);
}

.hec-paint-intro-icon {
    width: 55px;
    height: 55px;
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    flex-shrink: 0;
}

.hec-paint-intro-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: #1e293b;
    margin: 0;
    line-height: 1.3;
}

.hec-paint-intro-text {
    font-size: 1rem;
    color: #475569;
    line-height: 1.8;
    margin: 0 0 12px 0;
}

.hec-paint-intro-text:last-child {
    margin-bottom: 0;
}

.hec-paint-advantages-box {
    background: white;
    border: 2px solid rgba(59, 130, 246, 0.15);
    border-radius: 24px;
    padding: 32px;
    box-shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
}

.hec-paint-advantages-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 2px solid rgba(148, 163, 184, 0.1);
}

.hec-paint-advantages-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.hec-paint-advantages-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: #1e293b;
    margin: 0;
}

.hec-paint-advantages-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.hec-paint-advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 18px;
    background: rgba(16, 185, 129, 0.05);
    border: 1px solid rgba(16, 185, 129, 0.15);
    border-left: 4px solid #10b981;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.hec-paint-advantage-item:hover {
    background: rgba(16, 185, 129, 0.08);
    transform: translateX(6px);
}

.hec-paint-advantage-check {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #10b981, #059669);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 2px;
}

.hec-paint-advantage-text {
    font-size: 0.95rem;
    color: #475569;
    line-height: 1.6;
}

.hec-paint-solution-box {
    display: flex;
    gap: 16px;
    padding: 24px 28px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(14, 165, 233, 0.05));
    border: 2px solid rgba(59, 130, 246, 0.15);
    border-left: 5px solid #3b82f6;
    border-radius: 18px;
}

.hec-paint-solution-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: white;
    flex-shrink: 0;
}

.hec-paint-solution-content {
    flex: 1;
}

.hec-paint-solution-text {
    font-size: 1rem;
    color: #475569;
    line-height: 1.7;
    margin: 0;
}

.hec-paint-solution-text strong {
    color: #3b82f6;
    font-weight: 700;
}

/* Right: Visual */
.hec-paint-main-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hec-paint-main-image-wrapper {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.15);
    width: 100%;
    height: 700px;
    transition: all 0.4s ease;
}

.hec-paint-main-image-wrapper:hover {
    transform: scale(1.02);
    box-shadow: 0 30px 80px rgba(15, 23, 42, 0.2);
}

.hec-paint-main-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.hec-paint-main-image-wrapper:hover img {
    transform: scale(1.05);
}

.hec-paint-main-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(14, 165, 233, 0.12));
}

/* Floating Features */
.hec-paint-floating-features {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.hec-paint-feature-badge {
    position: absolute;
    background: white;
    padding: 18px 22px;
    border-radius: 18px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    gap: 14px;
    pointer-events: auto;
    transition: all 0.3s ease;
    animation: float-hec-paint-feature 3s ease-in-out infinite;
}

.hec-paint-feature-badge:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 0 16px 50px rgba(0, 0, 0, 0.25);
}

.hec-paint-feature-pos-1 {
    top: 40px;
    right: 40px;
    animation-delay: 0s;
}

.hec-paint-feature-pos-2 {
    top: 50%;
    left: 40px;
    transform: translateY(-50%);
    animation-delay: 1s;
}

.hec-paint-feature-pos-3 {
    bottom: 40px;
    right: 40px;
    animation-delay: 2s;
}

@keyframes float-hec-paint-feature {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.hec-paint-feature-pos-2 {
    animation-name: float-hec-paint-feature-middle;
}

@keyframes float-hec-paint-feature-middle {
    0%, 100% {
        transform: translateY(-50%);
    }
    50% {
        transform: translateY(calc(-50% - 10px));
    }
}

.hec-paint-feature-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.hec-paint-feature-icon-symbol {
    font-size: 1.4rem;
}

.hec-paint-feature-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.hec-paint-feature-label {
    font-size: 0.8rem;
    color: #64748b;
    font-weight: 600;
}

.hec-paint-feature-value {
    font-size: 1rem;
    font-weight: 800;
    background: linear-gradient(135deg, #3b82f6, #0ea5e9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hec-paint-hero-section {
        padding: 80px 0;
    }
    
    .hec-paint-hero-section .content-container {
        padding: 0 40px;
    }
    
    .hec-paint-hero-title {
        font-size: 2.6rem;
    }
    
    .hec-paint-hero-subtitle {
        font-size: 1.15rem;
    }
    
    .hec-paint-main-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hec-paint-main-image-wrapper {
        height: 600px;
    }
}

@media (max-width: 768px) {
    .hec-paint-hero-section {
        padding: 60px 0;
    }
    
    .hec-paint-hero-section .content-container {
        padding: 0 30px;
    }
    
    .hec-paint-hero-title {
        font-size: 2.2rem;
    }
    
    .hec-paint-hero-subtitle {
        font-size: 1.05rem;
    }
    
    .hec-paint-main-image-wrapper {
        height: 500px;
    }
}

@media (max-width: 480px) {
    .hec-paint-hero-section {
        padding: 50px 0;
    }
    
    .hec-paint-hero-section .content-container {
        padding: 0 20px;
    }
    
    .hec-paint-hero-title {
        font-size: 1.8rem;
    }
    
    .hec-paint-hero-subtitle {
        font-size: 0.95rem;
    }
    
    .hec-paint-intro-box,
    .hec-paint-advantages-box {
        padding: 28px;
    }
    
    .hec-paint-intro-icon {
        width: 50px;
        height: 50px;
        font-size: 1.4rem;
    }
    
    .hec-paint-intro-title {
        font-size: 1.2rem;
    }
    
    .hec-paint-intro-text {
        font-size: 0.95rem;
    }
    
    .hec-paint-advantages-icon {
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
    }
    
    .hec-paint-advantages-title {
        font-size: 1.1rem;
    }
    
    .hec-paint-advantage-check {
        width: 22px;
        height: 22px;
        font-size: 0.75rem;
    }
    
    .hec-paint-advantage-text {
        font-size: 0.9rem;
    }
    
    .hec-paint-solution-box {
        flex-direction: column;
        padding: 20px 24px;
    }
    
    .hec-paint-solution-icon {
        width: 45px;
        height: 45px;
        font-size: 1.4rem;
    }
    
    .hec-paint-solution-text {
        font-size: 0.95rem;
    }
    
    .hec-paint-main-image-wrapper {
        height: 450px;
    }
    
    .hec-paint-feature-badge {
        padding: 14px 18px;
    }
    
    .hec-paint-feature-icon {
        width: 40px;
        height: 40px;
    }
    
    .hec-paint-feature-icon-symbol {
        font-size: 1.2rem;
    }
    
    .hec-paint-feature-pos-1 {
        top: 20px;
        right: 20px;
    }
    
    .hec-paint-feature-pos-2 {
        left: 20px;
    }
    
    .hec-paint-feature-pos-3 {
        bottom: 20px;
        right: 20px;
    }
}

HEC
                            High Performance

Core Technology

Why HEC Is Essential in Emulsion Paint

HEC (Hydroxyethyl Cellulose) is a nonionic, water‑soluble polymer that acts as a powerful thickener, stabilizer, and film enhancer. Its unique rheological behavior ensures paint performs precisely as expected — from mixing tank to application.

HEC Provides:

✓
                            High thickening efficiency and consistent viscosity

✓
                            Smooth brush and roller feel

✓
                            Improved color acceptance and stain uniformity

✓
                            Longer open time and stronger water retention

✓
                            Anti‑sag and anti‑splatter properties

✓
                            Excellent storage stability and freeze‑thaw resistance

High‑quality HEC ensures paint layers spread uniformly, adhere firmly, resist cracking, and maintain a clean, attractive finish throughout their life cycle.

Product Range
            
            HEC Thickening Grades for Every Paint System
            LANDU offers three specialized performance grades, each optimized for different viscosity and application demands:

Grade
                        Thickening Effect
                        Application Range
                        Key Characteristics

High
                                HE100BE

High
                        Heavy‑duty coatings, mastic paints, protective layers
                        Strong film build, superior durability, excellent sag control

Medium
                                HE60

Medium
                        High PVC architectural paints and intermediate coats
                        Balanced workability, smooth leveling, versatile performance

Low
                                HE30

Low
                        Economy paints and primer formulations
                        Easy application, good flow, cost‑effective thickening

High Performance
                    HE100BE
                    
                        Thickening Effect:
                        High

Application Range:
                        Heavy‑duty coatings, mastic paints, protective layers

Key Characteristics:
                        Strong film build, superior durability, excellent sag control

Medium Performance
                    HE60
                    
                        Thickening Effect:
                        Medium

Application Range:
                        High PVC architectural paints and intermediate coats

Key Characteristics:
                        Balanced workability, smooth leveling, versatile performance

Economy Performance
                    HE30
                    
                        Thickening Effect:
                        Low

Application Range:
                        Economy paints and primer formulations

Key Characteristics:
                        Easy application, good flow, cost‑effective thickening

/* Why HEC Is Essential in Emulsion Paint Section */
.hec-essential-section {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f0f9ff 100%);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.hec-essential-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 15% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 85% 80%, rgba(14, 165, 233, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.hec-essential-section .content-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
    position: relative;
    z-index: 1;
}

.hec-essential-grid {
    display: grid;
    grid-template-columns: 40% 60%;
    gap: 60px;
    align-items: center;
}

/* Left: Visual */
.hec-essential-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hec-essential-image-wrapper {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.15);
    width: 100%;
    height: 650px;
    transition: all 0.4s ease;
}

.hec-essential-image-wrapper:hover {
    transform: scale(1.02);
    box-shadow: 0 30px 80px rgba(15, 23, 42, 0.2);
}

.hec-essential-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.hec-essential-image-wrapper:hover img {
    transform: scale(1.05);
}

.hec-essential-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(14, 165, 233, 0.12));
}

.hec-essential-badge {
    position: absolute;
    top: 24px;
    left: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    background: white;
    padding: 16px 24px;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    animation: float-hec-essential-badge 3s ease-in-out infinite;
}

@keyframes float-hec-essential-badge {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

.hec-essential-badge-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
    flex-shrink: 0;
}

.hec-essential-badge-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.hec-essential-badge-title {
    font-size: 1rem;
    font-weight: 700;
    color: #1e293b;
}

.hec-essential-badge-subtitle {
    font-size: 0.85rem;
    color: #64748b;
}

/* Right: Content */
.hec-essential-content {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.hec-essential-header-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    padding: 10px 24px;
    border-radius: 50px;
    border: 2px solid rgba(59, 130, 246, 0.2);
    width: fit-content;
}

.essential-header-badge-icon {
    font-size: 1.2rem;
}

.essential-header-badge-text {
    font-size: 0.9rem;
    font-weight: 700;
    color: #1e40af;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hec-essential-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: #0f172a;
    margin: 0;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hec-essential-intro-box {
    padding: 24px 28px;
    background: white;
    border: 2px solid rgba(59, 130, 246, 0.15);
    border-left: 5px solid #3b82f6;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
}

.hec-essential-intro-text {
    font-size: 1rem;
    color: #475569;
    line-height: 1.8;
    margin: 0;
}

.hec-essential-provides-box {
    background: white;
    border: 2px solid rgba(59, 130, 246, 0.15);
    border-radius: 24px;
    padding: 32px;
    box-shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
}

.hec-provides-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid rgba(148, 163, 184, 0.1);
}

.provides-header-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.provides-header-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: #1e293b;
    margin: 0;
}

.hec-provides-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.hec-provides-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 18px;
    background: rgba(16, 185, 129, 0.05);
    border: 1px solid rgba(16, 185, 129, 0.15);
    border-left: 4px solid #10b981;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.hec-provides-item:hover {
    background: rgba(16, 185, 129, 0.08);
    transform: translateX(6px);
}

.provides-check {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #10b981, #059669);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 2px;
}

.provides-text {
    font-size: 0.95rem;
    color: #475569;
    line-height: 1.6;
}

.hec-essential-conclusion-box {
    display: flex;
    gap: 16px;
    padding: 24px 28px;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.1), rgba(245, 158, 11, 0.1));
    border: 2px solid rgba(251, 191, 36, 0.2);
    border-left: 5px solid #fbbf24;
    border-radius: 18px;
}

.conclusion-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: white;
    flex-shrink: 0;
}

.conclusion-text {
    font-size: 1rem;
    color: #78350f;
    line-height: 1.7;
    margin: 0;
}

/* HEC Thickening Grades Section */
.hec-grades-section {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    padding: 100px 0;
    position: relative;
}

.hec-grades-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 15% 20%, rgba(59, 130, 246, 0.04) 0%, transparent 50%),
        radial-gradient(circle at 85% 80%, rgba(14, 165, 233, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

.hec-grades-section .content-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
    position: relative;
    z-index: 1;
}

/* Section Header */
.hec-grades-header {
    text-align: center;
    margin-bottom: 60px;
}

.grades-header-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    padding: 10px 24px;
    border-radius: 50px;
    margin-bottom: 24px;
    border: 2px solid rgba(59, 130, 246, 0.2);
}

.grades-badge-icon {
    font-size: 1.2rem;
}

.grades-badge-text {
    font-size: 0.9rem;
    font-weight: 700;
    color: #1e40af;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hec-grades-title {
    font-size: 2.8rem;
    font-weight: 800;
    color: #0f172a;
    margin: 0 0 20px 0;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hec-grades-subtitle {
    font-size: 1.1rem;
    color: #475569;
    line-height: 1.6;
    margin: 0;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

/* Grades Table */
.hec-grades-table-wrapper {
    background: white;
    border: 2px solid rgba(59, 130, 246, 0.15);
    border-radius: 24px;
    padding: 0;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
    display: block;
}

.hec-grades-table {
    width: 100%;
    border-collapse: collapse;
}

.hec-grades-table thead {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.hec-grades-table th {
    padding: 20px;
    text-align: left;
    font-size: 0.95rem;
    font-weight: 700;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hec-grades-table tbody tr {
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
    transition: all 0.3s ease;
}

.hec-grades-table tbody tr:last-child {
    border-bottom: none;
}

.hec-grades-table tbody tr:hover {
    background: rgba(59, 130, 246, 0.03);
}

.hec-grades-table td {
    padding: 20px;
    font-size: 0.9rem;
    color: #475569;
    line-height: 1.6;
    vertical-align: top;
}

.grade-name-cell {
    display: flex;
    align-items: center;
    gap: 12px;
}

.grade-badge {
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.grade-badge-high {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
}

.grade-badge-medium {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
}

.grade-badge-low {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
}

.grade-name {
    font-size: 1.1rem;
    font-weight: 800;
    color: #1e293b;
}

.thickening-level {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 700;
}

.thickening-high {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.thickening-medium {
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.thickening-low {
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* Grades Cards (Mobile) */
.hec-grades-cards {
    display: none;
    grid-template-columns: 1fr;
    gap: 24px;
}

.hec-grade-card {
    background: white;
    border: 2px solid rgba(59, 130, 246, 0.15);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
    transition: all 0.3s ease;
}

.hec-grade-card:hover {
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: 0 12px 40px rgba(59, 130, 246, 0.12);
    transform: translateY(-4px);
}

.hec-grade-card-high {
    border-left: 5px solid #ef4444;
}

.hec-grade-card-medium {
    border-left: 5px solid #f59e0b;
}

.hec-grade-card-low {
    border-left: 5px solid #10b981;
}

.hec-grade-card-header {
    padding: 28px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(14, 165, 233, 0.05));
    border-bottom: 2px solid rgba(148, 163, 184, 0.1);
}

.grade-card-badge {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.grade-card-badge-high {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
}

.grade-card-badge-medium {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
}

.grade-card-badge-low {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
}

.grade-card-name {
    font-size: 1.8rem;
    font-weight: 800;
    color: #1e293b;
    margin: 0 0 16px 0;
}

.grade-card-level {
    display: flex;
    align-items: center;
    gap: 8px;
}

.grade-card-level-label {
    font-size: 0.9rem;
    color: #64748b;
    font-weight: 600;
}

.grade-card-level-value {
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 700;
}

.grade-card-level-high {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.grade-card-level-medium {
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.grade-card-level-low {
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.hec-grade-card-body {
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.grade-card-section-title {
    font-size: 1rem;
    font-weight: 700;
    color: #1e293b;
    margin: 0 0 8px 0;
}

.grade-card-section-text {
    font-size: 0.95rem;
    color: #475569;
    line-height: 1.7;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hec-essential-section,
    .hec-grades-section {
        padding: 80px 0;
    }
    
    .hec-essential-section .content-container,
    .hec-grades-section .content-container {
        padding: 0 40px;
    }
    
    .hec-essential-title,
    .hec-grades-title {
        font-size: 2.4rem;
    }
    
    .hec-essential-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hec-essential-image-wrapper {
        height: 550px;
    }
    
    .hec-grades-table-wrapper {
        display: none;
    }
    
    .hec-grades-cards {
        display: grid;
    }
}

@media (max-width: 768px) {
    .hec-essential-section,
    .hec-grades-section {
        padding: 60px 0;
    }
    
    .hec-essential-section .content-container,
    .hec-grades-section .content-container {
        padding: 0 30px;
    }
    
    .hec-essential-title,
    .hec-grades-title {
        font-size: 2rem;
    }
    
    .hec-essential-image-wrapper {
        height: 500px;
    }
}

@media (max-width: 480px) {
    .hec-essential-section,
    .hec-grades-section {
        padding: 50px 0;
    }
    
    .hec-essential-section .content-container,
    .hec-grades-section .content-container {
        padding: 0 20px;
    }
    
    .hec-essential-title,
    .hec-grades-title {
        font-size: 1.6rem;
    }
    
    .hec-grades-subtitle {
        font-size: 1rem;
    }
    
    .hec-essential-image-wrapper {
        height: 450px;
    }
    
    .hec-essential-badge {
        padding: 12px 16px;
        top: 16px;
        left: 16px;
    }
    
    .hec-essential-badge-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
    
    .hec-essential-intro-box {
        padding: 20px 24px;
    }
    
    .hec-essential-intro-text {
        font-size: 0.95rem;
    }
    
    .hec-essential-provides-box {
        padding: 28px;
    }
    
    .provides-header-icon {
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
    }
    
    .provides-header-title {
        font-size: 1.1rem;
    }
    
    .provides-check {
        width: 22px;
        height: 22px;
        font-size: 0.75rem;
    }
    
    .provides-text {
        font-size: 0.9rem;
    }
    
    .hec-essential-conclusion-box {
        flex-direction: column;
        padding: 20px 24px;
    }
    
    .conclusion-icon {
        width: 45px;
        height: 45px;
        font-size: 1.4rem;
    }
    
    .conclusion-text {
        font-size: 0.95rem;
    }
    
    .hec-grade-card-header {
        padding: 24px;
    }
    
    .grade-card-name {
        font-size: 1.6rem;
    }
    
    .hec-grade-card-body {
        padding: 24px;
    }
    
    .grade-card-section-title {
        font-size: 0.95rem;
    }
    
    .grade-card-section-text {
        font-size: 0.9rem;
    }
}

Usage Guide
            
            How to Use HEC in Emulsion Paint
            LANDU HEC can be incorporated using different processing methods depending on equipment and formulation design.

01

Addition During Pigment Grinding
                    
                    The most common and straightforward method.

Steps:

1
                                Add clean water to the mixing tank.

2
                                Begin slow stirring.

3
                                Gradually add HEC powder.

4
                                Add surfactants, dispersants, and preservatives.

5
                                Continue mixing until fully hydrated and uniform.

02

Mother Solution Preparation
                    
                    HEC is pre‑hydrated into a concentrated solution before being added to the paint batch.

Advantages:

●
                                Precise viscosity control

●
                                Easy adjustment during production

●
                                Reduces dusting and improves consistency

03

Slurry Technique
                    
                    HEC is first dispersed in a compatible solvent to form a slurry and then hydrated.

Features:

✓
                                Faster dispersion and hydration (5–30 min)

✓
                                Ideal for automated dispensing lines

✓
                                Simplifies scaling in industrial production

Performance
            
            Application Performance

Brush

Brush Application

Accepted Answer

HEC enhances the painter's experience with a smooth, even flow.

Question 2

Roller Application

Accepted Answer

Balanced viscosity and water retention enable perfect roller behavior.

Question 3

Consistent Viscosity Performance

Accepted Answer

Stable molecular design for batch‑to‑batch precision.

Question 4

Superior Water Retention

Accepted Answer

Prevents pigment floating and extends open time.

Question 5

High Thickening Efficiency

Accepted Answer

Less material for the same result, reducing costs.

Question 6

Improved Film Quality

Accepted Answer

Enhances durability and surface smoothness.

Question 7

Customized Grades

Accepted Answer

Tailor‑made solutions for varied formulations and regional conditions.

Question 8

Strict Quality Control

Accepted Answer

Each batch tested for moisture, pH, viscosity, particle size, and purity.

Question 9

Interior and exterior emulsion paints

High‑PVC economic formulations

Premium architectural coatings

Water‑based primers and sealants

Textured and thick‑build coatings

Latex protective coatings & binders

Free Sample
                            Available Now

Sample Program

Free Sample Program
                Experience LANDU HEC performance firsthand with our free sample packages for paint manufacturers and R&D professionals.

Each sample kit includes:

●
                            200–600 g HEC sample (per grade)

●
                            Technical Data Sheet (TDS)

●
                            Material Safety Data Sheet (MSDS)

●
                            Application and formulation guidelines

Request Your Free Sample
                            →
                        
                        Fast international shipping available.

Partnership

Partner with LANDU — Your Reliable Cellulose Ether Expert
                With robust manufacturing, ISO‑certified QA systems, and deep technical know‑how, LANDU supports coating manufacturers worldwide in building high‑performance paint formulations.

We Help You:

✓
                            Optimize rheology and application behavior

✓
                            Reduce production costs through high efficiency thickening

✓
                            Enhance paint smoothness and color stability

✓
                            Strengthen brand value with consistent product quality

LANDU

Accepted Answer

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Karakter	Thickening Effect	Application Range	Key Characteristics
Høj cURL Too many subrequests.	Høj	Heavy‑duty coatings, mastic paints, protective layers	Strong film build, superior durability, excellent sag control
Medium HE60	Medium	High PVC architectural paints and intermediate coats	Balanced workability, smooth leveling, versatile performance
Low HE30	Low	Economy paints and primer formulations	Easy application, good flow, cost‑effective thickening

LANDU HEC for Emulsion Paint

What Is Emulsion Paint?

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Why HEC Is Essential in Emulsion Paint

HEC Provides:

HEC Thickening Grades for Every Paint System

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Application Range:

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HE60

Application Range:

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HE30

Application Range:

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Slurry Technique

Features:

Application Performance

Brush Application

Ydeevne højdepunkter:

Roller Application

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Why Choose LANDU HEC

Consistent Viscosity Performance

Superior Water Retention

High Thickening Efficiency

Improved Film Quality

Customized Grades

Strict Quality Control

Industries & Applications

Interior and exterior emulsion paints

High‑PVC economic formulations

Premium architectural coatings

Water‑based primers and sealants

Textured and thick‑build coatings

Latex protective coatings & binders

Gratis prøveprogram

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LANDU