Acrylic coated thermoplastic substrate
AssigneeGeneral Electric Company
InventorDimitris Katsamberis
Life of this patent
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Abstract
An ultraviolet radiation curable silica coating composition containing (a) acrylic monomers, (b) functionalized colloidal silica, (c) acrylated urethanes, (d) an ultraviolet radiation absorber, and (e) a photoinitiator. The coating composition once applied to and cured on a thermoplastic substrate provides a coating which exhibits improved flexibility and weathering. The coatings are useful for providing abrasion resistance and weatherability to thermoplastic, for example polycarbonate, substrates.
Claims13
A coated thermoplastic article having an abrasion resistant coating adhered to a thermoplastic substrate, the coating being the ultraviolet radiation cured reaction products of a solventless composition comprising:
- (a) from 10 percent by weight to 60 percent by weight based on the total weight of the coating composition of a multifunctional acrylate ester monomer;
- (b) from 20 percent by weight to 40 percent by weight based on the total weight of the coating composition of an acrylate functionalized colloidal silica;
- (c) from 5 percent by weight to 40 percent by weight based on the total weight of the coating composition of a multifunctional acrylated aliphatic urethane;
- (d) from 5 percent dry weight to 10 percent by weight based on the total weight of the coating composition of an ultraviolet radiation absorber;
- and
- (d) from 1 percent by weight to 5 percent by weight based on the total weight of the coating composition of a photoinitiator.
A coated thermoplastic article having an abrasion resistant coating adhered to a thermoplastic substrate, the coating being the ultraviolet radiation cured reaction products of a solventless composition comprising:
- (a) hexanediol diacrylate present at a level of from 10 percent by weight to 60 percent by weight based on the total weight of the composition;
- (b) at least one acrylate functionalized colloidal silica present at a level of from 20 percent by weight to 40 percent by weight based on the total weight of the composition;
- (c) at least one multifunctional acrylated polyurethane present at a level of from 5 percent by weight to 40 percent by weight based on the total weight of the composition;
- (d) at least one ultraviolet light absorber present at a level of from 5 percent by weight to 10 percent by weight based on the total weight of the composition;
- and
- (e) at least one photoinitiator present at a level of from 1 percent by weight to 5 percent by weight based on the total weight of the composition.
A coated thermoplastic article having an abrasion resistant coating adhered to a thermoplastic substrate, the coating being the ultraviolet radiation cured reaction products of a solventless composition consisting essentially of:
- (a) at least one multifunctional acrylic ester monomer present at a level of from 20 percent by weight to 50 percent by weight based on the total weight of the composition;
- (b) at least one acrylate functionalized colloidal silica present at a level of from 20 percent by weight to 40 percent by weight based on the total weight of the composition;
- (c) at least one multifunctional acrylated polyurethane present at a level of from 5 percent by weight to 40 percent by weight based on the total weight of the composition;
- (d) at least one ultraviolet light absorber present at a level of, from 5 percent by weight to 10 percent by weight based on the total weight of the composition;
- and
- (e) at least one photoinitiator present at a level of from 1 percent by weight to 5 percent by weight based on the total weight of the composition.
Dependencies are inferred from the claim text.