Coating compositions comprising isobornyl methacrylate and 4-hydroxybutyl acrylate
AssigneeImperial Chemical Industries PLC
InventorsDavid R. Fenn, Victoria L. Hughes
Life of this patent
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Abstract
A hydroxyl functional acrylic addition polymer, useful in producing refinish compositions having a good balance of solids at a given viscosity and final film hardness, which comprises units derived from isobornyl methacrylate and units derived from 4-hydroxybutyl acrylate.
Claims8
A high solids paint coating composition containing a film forming coreactive polymeric mixture in a volatile organic solvent, the polymeric mixture comprising:
- a hydroxyl functional acrylic addition polymer of 2% to 50% by weight copolymerized isobornyl methacrylate and 10% to 50% by weight 4-hydroxylbutyl acrylate with the balance being other copolymerized ethylenic monomers, the acrylic polymer having a number average molecular weight of 700 to 10,000 as measure by gel permeation chromotography;
- and
- a crosslinker adapted to coreact with the hydroxyl functional acrylic addition polymer upon curing to produce a crosslinked film.
A paint coating composition adapted to coreact upon curing to produce a crosslinked paint film, the paint coating comprising an acrylic film forming polymer of a hydroxyl functional addition polymer of 5% to 50% by weight copolymerized isobornyl methacrylate, 10% to 50% by weight copolymerized 4-hydroxybutyl acrylate, with balance being other copolymerized ethylenic monomers, the acrylic polymer having a number average molecular weight of 700 to 10,000 as measured by gel permeation chromatography, where the coating composition contains a crosslinking agent adapted to coreact with the hydroxyl functional acrylic polymer upon curing.
Dependencies are inferred from the claim text.