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High solids content for reduced VOC emissions and improved coating efficiency.
Excellent UV resistance and long-term color retention in outdoor applications.
Superior gloss and clarity, enabling high-end aesthetic finishes on coated substrates.
Good compatibility with common crosslinkers (e.g., melamine formaldehyde and polyisocyanates).
Controlled molecular weight distribution ensuring consistent flow, leveling, and film formation.
Automotive clearcoats and OEM topcoats.
Industrial maintenance coatings for metal and plastic substrates.
Architectural coatings requiring weatherability and gloss stability.
High-performance coil coatings for pre-painted metal sheets.
Refinish coatings in automotive and heavy equipment repair markets.
| Chemical Type | Thermosetting acrylic copolymer |
| Product Form | Liquid resin solution |
| Appearance | Clear, pale yellow to colorless liquid |
| Solids Content | 50–52 wt% (by gravimetric analysis) |
| Viscosity (25°C) | 1,800–2,200 mPa·s (Brookfield DV-II+ with spindle #3 at 20 rpm) |
| Acid Value | 6–9 mg KOH/g |
| Glass Transition Temperature (Tg) | 75–80°C (DSC, 10°C/min, second heat) |
| Primary Applications | High-gloss, weather-resistant thermoset coatings |
Q1: What is the primary function of LR-7524 in coating formulations?
A: LR-7524 is a specialty acrylic resin designed primarily as a rheology modifier and film-forming aid in solvent-based and high-solids industrial coatings. It enhances sag resistance, improves leveling, and contributes to uniform film build without significantly affecting gloss or clarity.
Q2: Is LR-7524 compatible with common crosslinkers used in thermosetting systems?
A: Yes, LR-7524 demonstrates good compatibility with standard amino resins (e.g., melamine-formaldehyde) and polyisocyanates in baked and ambient-cure systems. Its acrylic backbone allows for stable dispersion and minimal interference with crosslinking kinetics under typical formulation conditions.
Q3: How should LR-7524 be incorporated into a coating formulation?
A: LR-7524 is typically added during the let-down stage using high-shear mixing. Pre-dilution in a compatible solvent (e.g., xylene, butyl acetate, or ester solvents) is recommended to ensure homogeneous dispersion. Avoid prolonged high-temperature addition prior to solvent removal to preserve its functional integrity.
Q4: Does LR-7524 contribute to UV stability in finished coatings?
A: As a non-yellowing acrylic polymer, LR-7524 inherently supports improved UV resistance compared to many conventional rheology modifiers. While it is not a UV absorber itself, its chemical structure helps maintain formulation stability and reduces susceptibility to photochemical degradation in outdoor-exposed coatings.
Q5: Can LR-7524 be used in low-VOC or high-solids systems?
A: Yes — LR-7524 is formulated for use in medium-to-high solids systems and performs effectively in reduced-solvent environments. Its molecular design enables efficient thickening and suspension control at lower volatile content, supporting compliance with evolving environmental and regulatory expectations for industrial coatings.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
