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High transparency and excellent optical clarity for premium finish applications.
Superior weather resistance with outstanding UV stability and minimal yellowing over time.
Good compatibility with common solvents and co-resins, facilitating formulation flexibility.
Low viscosity in solution form, enabling easy processing via spray, dip, or roll-coating methods.
Excellent adhesion to various substrates including metals, plastics, and primed surfaces.
Automotive clearcoats and topcoats for OEM and refinish systems.
Architectural and industrial maintenance coatings requiring long-term gloss retention.
Plastic coatings for exterior automotive trim and consumer electronics housings.
High-performance can coatings for food and beverage packaging.
UV-curable hybrid systems where acrylic backbone enhances crosslink density and hardness.
| Chemical Type | Acrylic copolymer |
| Product Form | Solution in aromatic hydrocarbon solvent (e.g., xylene/toluene blend) |
| Appearance | Clear, colorless to pale yellow liquid |
| Solids Content | 45–50 wt% (as supplied) |
| Viscosity (25°C, #4 spindle, 20 rpm) | 1,200–1,800 cP |
| Acid Value | 5–15 mg KOH/g |
| Glass Transition Temperature (Tg) | ~75°C (DSC, dry film) |
| Primary Applications | High-gloss protective topcoats, UV-stable architectural finishes, plastic substrate coatings |
Q1: What is the primary function of LR-7506 in coating formulations?
A: LR-7506 is a specialty acrylic resin designed primarily as a rheology modifier and film-forming aid in water-based industrial and architectural coatings. It enhances viscosity stability, improves sag resistance, and supports uniform film formation without compromising gloss or clarity.
Q2: Is LR-7506 compatible with common water-based polymer systems?
A: Yes — LR-7506 demonstrates broad compatibility with acrylic emulsions, vinyl acetate copolymers, and styrene-acrylic dispersions. It is typically added during the let-down stage and remains stable across a pH range of approximately 7–9 under standard formulation conditions.
Q3: How should LR-7506 be incorporated into a formulation to ensure optimal performance?
A: LR-7506 is supplied as a ready-to-use aqueous dispersion and is generally added post-emulsion polymerization, under moderate agitation. To avoid destabilization, it should not be subjected to high-shear mixing for extended periods or added directly to highly ionic or low-pH components without prior dilution or buffering.
Q4: Does LR-7506 contribute to final film properties such as hardness or flexibility?
A: While not a primary film former, LR-7506 can positively influence film integrity by promoting coalescence and reducing micro-defects. Its presence often supports balanced hardness-flexibility profiles in cured films, particularly when used in conjunction with standard acrylic or hybrid binders.
Q5: Can LR-7506 be used in low-VOC or zero-VOC coating systems?
A: Yes — LR-7506 contains no added organic solvents and is formulated to support compliance with low-VOC regulatory frameworks. It is widely utilized in environmentally driven coating systems where water is the sole volatile carrier.
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E-mail: wangxingqiang@ericwchem.com
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