Base paints comprised of polyamide powders for use in coating PVC structures
AssigneeElf Atochem S.A.
InventorsBruno D'Herbecourt, Thierry Moulin
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Abstract
The invention relates to a coating composition for PVC sections, based on a polymeric vehicle, a crosslinking agent, and a thermoplastic resin powder. The coating composition is particularly useful for coating PVC sections for windows, shutters, and doors. PVC joinery coated with the composition of the invention has exceptional impact strength and resistance to abrasion, friction, and inclement weather.
Claims10
A coating composition suitable for coating polyvinyl chloride articles of manufacture, said composition being curable on a substrate (i) in an oven at a temperature between 20.degree. C. and 80.degree. C. or (ii) under infrared stoving at a surface temperature of between 50.degree. C. and 100.degree. C.,
- said composition comprising:
- a) a vehicle comprising polyacrylate, epoxy resin, polyether, polyester, polycaprolactone, vinyl chloride polymers or mixtures thereof, which polymers contain hydroxyl groups, carboxyl groups, or both said groups,
- b) an isocyanate crosslinking agent,
- c) a solvent for said vehicle and crosslinking agent, and
- d) finely divided thermoplastic resin particles ranging in size from 0.05 to 200 .mu.m in suspension,
- wherein said vehicle is branched to the extent that the paint film which is obtained by crosslinking said composition to form a film that is adherent to said PVC article of manufacture allows the plasticizers used in making said PVC article of manufacture to exude through said paint film and wherein said composition contains essentially no silicone oil.
A coating composition suitable for coating polyvinyl chloride articles of manufacture that consists essentially of:
- a) a vehicle comprising a mixture of two resins A1 and A2, in which:
- A1 is a resin containing hydroxyl and/or carboxylic groups, and
- A2 is a chlorinated vinyl resin containing hydroxyl and/or carboxylic groups,
- b) an isocyanate crosslinking agent,
- c) a solvent for said vehicle and crosslinking agent,
- d) finely divided thermoplastic resin particles ranging in size from 0.05 to 200 .mu.m in suspension, and
- e) one or more members selected from the group consisting of pigments, dyes, and fillers,
- wherein said vehicle is branched to the extent that the paint film which is obtained by crosslinking said composition to form a film that is adherent to said PVC article of manufacture allows the plasticizers used in making said PVC article of manufacture to exude through said paint film and wherein said composition contains essentially no silicone oil.
Dependencies are inferred from the claim text.