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High transparency with excellent optical clarity and UV stability.
Superior weather resistance, maintaining gloss and color retention under prolonged outdoor exposure.
Good compatibility with common solvent-based coating systems and crosslinkers.
Controlled molecular weight distribution for consistent film formation and leveling performance.
Low yellowing tendency, ideal for premium clearcoats and high-end decorative finishes.
Automotive OEM and refinish clearcoats.
Architectural and industrial maintenance coatings.
High-gloss wood and plastic coatings.
UV-curable hybrid topcoats requiring acrylic backbone compatibility.
Premium signage and display surface protective coatings.
| Chemical Type | Solvent-borne thermoplastic acrylic resin |
| Product Form | Clear liquid solution |
| Appearance | Colorless to pale yellow, transparent liquid |
| Solvent System | Standard aromatic and ester blend (e.g., xylene/ethyl acetate) |
| Solids Content | 50 ± 2 wt% (as supplied) |
| Acid Value | 5–10 mg KOH/g |
| Gardner Color | ≤ 3 |
| Viscosity (25°C) | 800–1,200 mPa·s (Brookfield, spindle #3, 60 rpm) |
Q1: What is the primary functional role of HR-7400 in coating and ink formulations?
A: HR-7400 is a high-molecular-weight acrylic resin designed primarily as a rheology modifier and film-forming aid. It enhances viscosity control, improves pigment suspension stability, and contributes to smooth film formation with good gloss and surface uniformity in solvent-based and high-solids systems.
Q2: Is HR-7400 compatible with common industrial solvents and other polymer resins?
A: Yes, HR-7400 exhibits broad compatibility with aromatic and aliphatic hydrocarbons, ketones, esters, and glycol ether solvents. It is also commonly used alongside alkyd, polyester, and other acrylic resins in hybrid binder systems—compatibility should always be verified experimentally under specific formulation conditions.
Q3: How does HR-7400 perform under elevated temperature or UV exposure during curing or service life?
A: As a saturated acrylic polymer, HR-7400 offers inherent resistance to thermal degradation and UV-induced yellowing. It maintains molecular integrity during standard thermal cure cycles and supports long-term color stability and gloss retention in outdoor-exposed coatings.
Q4: What are typical handling and storage recommendations for HR-7400?
A: HR-7400 should be stored in tightly sealed containers in a cool, dry, and well-ventilated area, away from direct sunlight and strong oxidizing agents. Prolonged exposure to moisture or extreme temperatures may affect solution stability; therefore, it is recommended to use within 12 months of receipt when stored under controlled conditions.
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E-mail: wangxingqiang@ericwchem.com
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