Organoalkoxysilane coating compositions for plastic articles
AssigneesNippon Fine Chemical Co., Ltd., Nippon Aspherical Lens Co., Ltd.
InventorsMitsuaki Tanaka, Masaharu Suzuki
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Abstract
This invention provides a composition for coating plastics articles comprising (A) a hydrolyzed product of an organoalkoxysilane represented by the formula R.sup.1.sub.n Si(OR.sup.2).sub.4-n (I) wherein R.sup.1 is a saturated or unsaturated hydrocarbon residue having 1 to 4 carbon atoms, R.sup.2 is a saturated hydrocarbon residue having 1 to 4 carbon atoms, and n is 0, 1 or 2, (B) an epoxy resin having an epoxy equivalent of about 120 to about 700, and (C) a bicyclic amidine represented by the formula ##STR1## wherein m is 3 or 5, or a salt thereof; a method of coating plastics articles with use of the composition; and plastics articles having a cured coating of the composition.
Claims14
A composition for coating plastics articles comprising
- (A) 100 parts by weight of hydrolyzed product of an organoalkoxysilane represented by the formula
- R.sup.1.sub.n Si(OR.sup.2).sub.4-n (I)
- wherein R.sup.1 is a saturated or unsaturated hydrocarbon residue having 1 to 4 carbon atoms, R.sup.2 is a saturated hydrocarbon residue having 1 to 4 carbon atoms, and n is 0, 1 or 2,
- (B) about 1 to about 10 parts by weight of an epoxy resin having an epoxy equivalent of about 120 to about 700, and
- (C) about 0.05 to about 5 parts by weight of a bicyclic amidine represented by the formula ##STR3## wherein m is 3 or 5, or a salt thereof.
A method of coating a plastics article comprising applying a composition to the surface of the plastics article and forming a cured coating of the composition thereon, the composition comprising
- (A) 100 parts by weight of hydrolyzed product of an organoalkoxysilane represented by the formula
- R.sup.1.sub.n Si(OR.sup.2).sub.4-n (I)
- wherein R.sup.1 is a saturated or unsaturated hydrocarbon residue having 1 to 4 carbon atoms, R.sup.2 is a saturated hydrocarbon residue having 1 to 4 carbon atoms, and n is 0, 1 or 2,
- (B) about 1 to about 10 parts by weight of an epoxy resin having an epoxy equivalent of about 120 to about 700, and
- (C) about 0.05 to about 5 parts by weight of a bicyclic amidine represented by the formula ##STR4## wherein m is 3 or 5, or a salt thereof.
A plastics article having a cured coating of a composition comprising
- (A) 100 parts by weight of hydrolyzed product of an organoalkoxysilane represented by the formula
- R.sup.1.sub.n Si(OR.sup.2).sub.4-n (I)
- wherein R.sup.1 is a saturated or unsaturated hydrocarbon residue having 1 to 4 carbon atoms, R.sup.2 is a saturated hydrocarbon residue having 1 to 4 carbon atoms, and n is 0, 1 or 2,
- (B) about 1 to about 10 parts by weight of an epoxy resin having an epoxy equivalent of about 120 to about 700, and
- (C) about 0.05 to about 5 parts by weight of a bicyclic amidine represented by the formula ##STR5## wherein m is 3 or 5, or a salt thereof.
Dependencies are inferred from the claim text.