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High transparency and excellent optical clarity for premium visual performance.
Superior weather resistance, including UV stability and long-term color retention.
Good thermal processability suitable for extrusion and injection molding operations.
Low birefringence ideal for optical-grade components and light-guiding applications.
Consistent melt flow behavior ensuring reproducible processing and part quality.
LED light guides and backlight units for LCD displays.
Optical lenses and light-diffusing plates in lighting systems.
Automotive interior trim components requiring high gloss and durability.
Medical device housings where clarity and biocompatibility-supporting purity are critical.
Architectural glazing and signage materials demanding long-term aesthetic integrity.
| Chemical Type | Poly(methyl methacrylate) (PMMA) |
| Product Form | Granular solid |
| Appearance | White translucent pellets |
| Melt Flow Rate (230°C/3.8 kg) | 5–7 g/10 min |
| Density | 1.18–1.20 g/cm³ |
| Refractive Index (25°C) | 1.491–1.493 |
| Transmittance (1 mm thickness) | ≥92% |
| Primary Applications | Optical components, lighting, automotive interiors, medical devices |
Q1: What is the primary function of HR-7076 in coating formulations?
A: HR-7076 is a specialty acrylic resin designed to act as a rheology modifier and film-forming aid, enhancing viscosity control, sag resistance, and leveling performance—particularly in waterborne architectural and industrial coatings.
Q2: Is HR-7076 compatible with common water-based polymer systems?
A: Yes, HR-7076 exhibits broad compatibility with acrylic emulsions, styrene-acrylic dispersions, and vinyl acetate copolymers. It is typically added during the let-down stage and remains stable across standard pH ranges (7–9) without causing coagulation or viscosity instability.
Q3: How should HR-7076 be incorporated into a formulation to ensure optimal performance?
A: HR-7076 is supplied as an aqueous dispersion and should be added under moderate agitation—preferably after the main binder and before thickeners or defoamers. Pre-dilution with deionized water may improve uniform dispersion, especially in high-solids systems.
Q4: Does HR-7076 contribute to final film properties such as hardness or gloss?
A: While not a primary film former, HR-7076 supports improved film continuity and surface uniformity, which can positively influence gloss development and early-stage hardness build. Its low-Tg character helps maintain flexibility without compromising intercoat adhesion.
Q5: Can HR-7076 be used in low-VOC or zero-VOC coating systems?
A: Yes—HR-7076 contains no added organic solvents or APEOs, and its aqueous nature aligns well with low-VOC regulatory frameworks. It enables formulators to reduce or eliminate co-solvent usage while maintaining application performance.
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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
