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High transparency and excellent optical clarity for premium finish applications.
Outstanding weather resistance and UV stability, minimizing yellowing and gloss loss over time.
Good compatibility with common solvent-based coating systems and crosslinkers.
Low viscosity in standard solvents, enabling easy handling and efficient spray or roll-coating application.
Consistent batch-to-batch reproducibility backed by stringent quality control standards.
Automotive clearcoats and topcoats requiring high-gloss, durable finishes.
Industrial maintenance coatings for metal and plastic substrates.
Architectural coatings including exterior façade and cladding systems.
Refinish coatings for OEM and aftermarket automotive repair.
High-performance protective coatings for signage and display panels.
| Chemical Type | Acrylic copolymer resin |
| Product Form | Solvent solution (typically in aromatic hydrocarbons and/or ester blends) |
| Appearance | Clear, colorless to pale yellow liquid |
| Solids Content | Approx. 50 ± 2 wt% (as supplied) |
| Acid Value | 15–25 mg KOH/g |
| Hydroxyl Value | 40–60 mg KOH/g |
| Viscosity (25°C, #4 Ford Cup) | 18–24 seconds |
| Primary Applications | Two-component (2K) polyurethane and amino-cured thermoset coatings |
Q1: What is the primary function of LR-7602 in coating formulations?
A: LR-7602 is a specialty acrylic polymer designed primarily as a rheology modifier and matting agent in solvent-based and high-solids industrial coatings. It helps control flow, reduce gloss, and enhance surface texture without significantly compromising film integrity or clarity.
Q2: Is LR-7602 compatible with common crosslinkers used in thermosetting acrylic systems?
A: Yes, LR-7602 demonstrates good compatibility with melamine-formaldehyde, urea-formaldehyde, and polyisocyanate crosslinkers typically employed in baking enamels and two-component polyurethane systems. Compatibility should be verified under actual formulation conditions due to sensitivity to solvent polarity and acid value.
Q3: How is LR-7602 typically incorporated into a coating formulation?
A: LR-7602 is generally added during the let-down stage, dispersed using high-shear mixing in suitable solvents such as xylene, toluene, or ketones. Pre-dispersion in a portion of the vehicle resin or solvent prior to incorporation is recommended to ensure uniform distribution and optimal performance.
Q4: Does LR-7602 require post-addition stabilization or pH adjustment?
A: LR-7602 is supplied as a stable dispersion and does not require pH adjustment. However, its performance may be affected by strongly acidic or alkaline additives; therefore, it is advisable to avoid co-addition with low-pH catalysts or amine-based dispersants unless compatibility testing confirms stability.
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