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US 4,291,097 AGranted
Scratch-resistant, dyeable coating compositions for synthetic resin articles
AssigneeMitsubishi Rayon Co., Ltd.
InventorsKazumasa Kamada, Isao Sasaki, Kenji Kushi
Life of this patent
Estimating the term…
Abstract
Coating compositions comprising a polyfunctional monomer of a mono or polypentaerythritol poly(meth)acrylate, a bifunctional (meth)acrylate having specific monomer structure, an additional (meth)acrylate containing not more than 2 (meth)acryloyloxy groups, a phosphoric acid ester and an ethanolamine all blended together in a suitable organic solvent system together with a photosensitizer are disclosed. The compositions provide a scratch-resistant, hard cross-linked film surface that is dyeable and resists static and fogging to a synthetic resin article, such as polymethyl methacrylate, to which they are applied.
Claims21
A coating composition comprising:
- 5 to 90 parts by weight of a monomer mixture (A), which monomer mixture consists essentially of:
- (1) from about 30 to about 95% by weight of a polyfunctional monomer of a mono or polypentaerythritol poly(meth)acrylate having at least three (meth)acryloyloxy groups per molecule and represented by the formula:
- ##STR8## wherein at least 3 of X are CH.sub.2 .dbd.CR--COO-- groups and the rest are --OH groups, n is an integer of 0 to 4 and R is hydrogen or a methyl group;
- (2) up to about 60% by weight of a bifunctional monomer represented by the formula:
- ##STR9## wherein R.sub.1 is hydrogen or a methyl group, X.sub.1, X.sub.2, --X.sub.n '.sub.2 which may be the same or different, alkylene groups containing at least 6 carbon atoms or of an alkylene-type group containing at most 6 carbon atoms in which one hydrogen atom is replaced with a hydroxyl group, and n'.sub.2 is an integer of 0 to 5;
- (3) from about 3 to about 40% by weight of a monomer containing not more than 2 (meth)acryloyloxy groups in one molecule, having a boiling point not below 150.degree. C. under atmospheric pressure and a viscosity not higher than 20 centipoises at 20.degree. C.;
- (4) from about 1 to about 20% by weight of a phosphoric acid ester-type monomer represented by the formula ##STR10## wherein R.sub.2 is hydrogen or a methyl group, R.sub.3 is hydrogen or a ##STR11## group, R.sub.4 is hydrogen or a methyl group, n and m are an integer of 1 to 5;
- and
- (5) from about 1 to about 10% by weight of an ethanolamine-type compound represented by the formula:
- NR.sub.5 R.sub.6 (CH.sub.2 CH.sub.2 OH) (IV)
- wherein each of R.sub.5 and R.sub.6 is independently hydrogen, an alkyl group of 1 to 15 atoms or a CH.sub.2 CH.sub.2 OH group);
- (B) from about 95 to about 10 parts by weight of at least one organic solvent that forms a uniform solution when mixed with said monomer mixture (A);
- and
- (C) up to 10 parts by weight of a photosensitizing agent per 100 parts by weight of the total of the mixture (A) and organic solvent (B);
- said coating capable of forming a dyeable cross-linked, hardened film high in abrasion resistance, surface smoothness and antistaticity when irradiated with active energy rays in air.
12 more elements
A coating composition comprising:
- 5 to 90 parts by weight of a monomer mixture (A), which monomer mixture consists essentially of:
- (1) from about 30 to about 95% by weight of a polyfunctional monomer of a mono or polypentaerythritol poly(meth)acrylate having at least three (meth)acryloyloxy groups per molecule and represented by the formula:
- ##STR13## wherein at least 3 of X are CH.sub.2 .dbd.CR--COO-- groups and the rest are --OH groups, n is an integer of 0 to 4 and R is hydrogen or a methyl group;
- (2) from about 0.1 to about 60% by weight of a bifunctional monomer represented by the formula:
- ##STR14## wherein R.sub.1 is hydrogen or a methyl group, X.sub.1, X.sub.2, --X.sub.n '.sub.2 which may be the same or different, alkylene groups containing at least 6 carbon atoms or of an alkylene-type group containing at most 6 carbon atoms in which one hydrogen atom is replaced with a hydroxyl grtoup, and n'.sub.2 is an integer of 0 to 5;
- (3) from about 3 to about 40% by weight of a monomer containing not more than 2 (meth)acryloyloxy groups in one molecule, having a boiling point not below 150.degree. C. under atmospheric pressure and a viscosity not higher than 20 centipoises at 20.degree. C.;
- (4) from about 3 to about 15% by weight of a phosphoric acid ester-type monomer represented by the formula:
- ##STR15## wherein R.sub.2 is hydrogen or a methyl group, R.sub.3 is hydrogen or a ##STR16## group, R.sub.4 is hydrogen or a methyl group, n is as defined above and m is an integer of 1 to 5;
- and
- (5) from about 2 to about 6% by weight of an ethanolamine-type compound represented by the formula:
- NR.sub.5 R.sub.6 (CH.sub.2 CH.sub.2 OH) (IV)
- wherein each of R.sub.5 and R.sub.6 is independently hydrogen, an alkyl group of 1 to 15 carbon atoms or a CH.sub.2 CH.sub.2 OH group);
- (B) from about 95 to about 10 parts by weight of at least one organic solvent that forms a uniform solution when mixed with said monomer mixture (A) and having a boiling point in the range of about 50.degree. to about 200.degree. C.;
- and
- (C) from about 0.01 to about 10 parts by weight of a photosensitizing agent per 100 parts by weight of the total of the monomer mixture (A) and organic solvent (B);
- said coating capable of forming a dyeable cross-linked, hardened film high in abrasion resistance, surface smoothness and antistaticity when irradiated with active energy rays in air.
13 more elements
Dependencies are inferred from the claim text.