Domestic HY-302 Waterborne Acrylic Alkali-Swellable Thickener

Features Of Domestic HY-302 Waterborne Acrylic Alkali-Swellable Thickener

1. High-efficiency rheology control in low-to-medium pH systems after alkali activation.

2. Excellent compatibility with anionic surfactants and common waterborne acrylic, styrene-acrylic, and vinyl acetate copolymer emulsions.

3. Provides outstanding sag resistance and leveling balance in architectural and industrial coatings.

4. Low VOC contribution and APEO-free formulation compliant with modern environmental regulations.

5. Stable viscosity build-up with minimal batch-to-batch variation and good shear recovery performance.

Typical Applications Of Domestic HY-302 Waterborne Acrylic Alkali-Swellable Thickener

1. Interior and exterior architectural wall paints.

2. Waterborne wood coatings for furniture and cabinetry.

3. Industrial maintenance coatings for metal substrates.

4. Water-based primers and undercoats.

5. Textile printing pastes requiring controlled flow behavior.

Specifications Of Domestic HY-302 Waterborne Acrylic Alkali-Swellable Thickener

Domestic HY-302 Waterborne Acrylic Alkali-Swellable Thickener – Frequently Asked Questions (FAQ)

Q1: How does HY-302 differ from hydrophobically modified ethoxylated urethane (HEUR) thickeners?

A: HY-302 is an alkali-swellable acrylic polymer that thickens primarily through charge repulsion and chain expansion in neutralized alkaline conditions, delivering high low-shear viscosity and excellent water retention. Unlike HEUR thickeners—which rely on associative hydrophobic junctions—HY-302 offers stronger pseudoplasticity control and greater compatibility with ionic surfactants and high-electrolyte systems commonly found in architectural coatings and industrial waterborne formulations.

Q2: What pH range is required for optimal performance of HY-302?

A: HY-302 requires alkaline activation to fully swell and develop viscosity. It performs best when the formulation pH is adjusted to 8.0–9.5 using common neutralizing agents such as AMP-95, TEA, or sodium hydroxide. Below pH 7.5, viscosity development is significantly reduced; above pH 10.0, long-term stability may be compromised in some systems.

Q3: Can HY-302 be used in combination with other rheology modifiers?

A: Yes—HY-302 is frequently blended with cellulosic thickeners (e.g., HEC) or fumed silica to balance high-shear flow and sag resistance, or with HEUR thickeners to fine-tune mid-to-high shear response. Compatibility testing is recommended, particularly when combining with associative thickeners or high-ionic-strength additives, to avoid viscosity loss or instability.

Q4: Is HY-302 suitable for freeze-thaw stable formulations?

A: HY-302 itself exhibits good inherent freeze-thaw reversibility when properly neutralized and incorporated into well-designed waterborne systems. However, overall formulation freeze-thaw stability depends on the full ingredient set—including co-thickeners, surfactants, and co-solvents—so comprehensive testing per ASTM D2243 or equivalent is advised for critical applications.