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High molecular weight solid acrylic resin offering excellent film hardness and scratch resistance.
Outstanding UV stability and long-term color retention in outdoor applications.
Good solubility in common organic solvents including xylene, toluene, and ester-based systems.
Low volatile organic compound (VOC) contribution when formulated into compliant coatings.
Thermoplastic nature enables easy melt-blending and compatibility with thermosetting resins.
Automotive refinish clearcoats and basecoat binders.
Industrial maintenance coatings for metal and plastic substrates.
Architectural high-performance exterior wall coatings.
Plastic coatings for consumer electronics housings.
UV-curable hybrid coating systems requiring thermal flow control.
| Chemical Type | Solid thermoplastic acrylic copolymer |
| Product Form | Free-flowing white to off-white granular solid |
| Appearance | Granular, non-dusty, free of visible specks or discoloration |
| Glass Transition Temperature (Tg) | Approx. 105–110 °C (DSC, 10 °C/min) |
| Acid Value | ≤ 5 mg KOH/g |
| Weight Average Molecular Weight (Mw) | 120,000–150,000 g/mol (GPC, polystyrene standard) |
| Residue on Ignition | ≤ 0.3 wt% |
| Primary Applications | High-gloss protective coatings, automotive and industrial topcoats |
Q1: What is the primary function of DSM B-890 in coating and ink formulations?
A: DSM B-890 is a solid acrylic resin designed to act as a rheology modifier and film-forming aid, enhancing viscosity control, leveling, and surface durability without significantly affecting gloss or clarity.
Q2: Is DSM B-890 compatible with water-based systems?
A: Yes — DSM B-890 is formulated for compatibility with both solvent-borne and water-based systems, including acrylic emulsions and hybrid dispersions, though optimal dispersion may require high-shear mixing or pre-dissolution in a co-solvent.
Q3: How does DSM B-890 contribute to scratch and mar resistance in finished films?
A: Its rigid acrylic backbone and controlled molecular architecture promote cohesive film integrity and surface hardness, leading to improved resistance to light mechanical abrasion and handling marks in protective coatings and overprint varnishes.
Q4: What are typical handling and storage recommendations for DSM B-890?
A: Store in original sealed containers in a cool, dry place away from direct sunlight and heat sources. Avoid prolonged exposure to humidity, as the solid resin may agglomerate under high-moisture conditions. Handle using standard industrial hygiene practices for organic powders.
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E-mail: wangxingqiang@ericwchem.com
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