Photocurable acrylic coating composition

• US 4,902,725 A
• Filed: 11/07/1988
• Issued: 02/20/1990
• Est. Priority Date: 12/22/1986
• Status: Expired due to Term

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Moore, James E.
• Primary Examiner(s): Jacobs, Lewis T.
• Assistant Examiner(s): Buttner, David
• Application Number:
  US07/268,314
• Time in Patent Office: 470 Days
• Field of Search: 522/42, 522/44, 522/75, 522/78, 522/79
• US Class Current: 522/42
• CPC Class Codes: C08F 222/102 of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate
• CPC Class Codes: C08F 222/103 of trialcohols, e.g. trimethylolpropane tri(meth)acrylate
• CPC Class Codes: C08J 2369/00 Characterised by the use of polycarbonates; Derivatives of polycarbonates
• CPC Class Codes: C08J 2433/00 Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
• CPC Class Codes: C08J 7/0427 with only one layer of a composition containing a polymer binder with more layers C08J7/042
• CPC Class Codes: C08J 7/043 Improving the adhesiveness of the coatings per se, e.g. forming primers adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50
• CPC Class Codes: C08J 7/046 Forming abrasion-resistant coatings; Forming surface-hardening coatings
• CPC Class Codes: C09D 4/00 Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
• CPC Class Codes: Y10T 428/31507 Of polycarbonate

Abstract

A photocured acrylic coat comprised of the photoreaction products of:

(i) at least one photocurable polyfunctional acrylate monomer;

(ii) at least one phenyl ketone photoinitiator; and

(iii) at least one active ultraviolet radiation absorber selected from benzotriazoles, cyanoacrylates, and hydroxybenzophenones. The coating is substantially completely or completely cured and provides improved protection to the substrate against ultraviolet radiation. The coating is also nonopaque or transparent.

Claims

1. An ultraviolet radiation curable coating composition consisting essentially of:

(i) at least one polyfunctional acrylate monomer;

(ii) at least one active ultraviolet radiation absorber selected from the group consisting of benzotriazoles, cyanoacrylates, and hydroxybenzophenones and mixtures thereof, said ultraviolet radiation absorber being present at a level of from about 5 to about 10 weight percent based on the total weight of polyfunctional acrylate monomers, photoinitiators and UV radiation absorber present in the composition; and

(iii) a photoinitiator selected from the group consisting of 2-hydroxy-2,2-dimethylacetophenone, 1-hydroxy cyclohexane phenyl ketone, and 2,2-dimethoxy-2-phenylacetophenone, said photoinitiator being present at a level of from about 0.05 to about 10 weight percent based on the total weight of the polyfunctional acrylate monomer and photoinitiator present in the coating composition.

2. The composition of claim 1 which contains from about 0.1 to about 5 weight percent of said photoinitiator.

3. The composition of claim 1 wherein said ultraviolet radiation absorber is a benzotriazole.

4. The composition of claim 1 wherein said polyfunctional acrylate monomer is comprised of at least one diacrylate monomer and at least one triacrylate monomer.

5. An ultraviolet radiation curable coating composition consisting essentially of:

(i) at least one polyfunctional acrylate monomer;

(ii) at least one active ultraviolet radiation absorber selected from the group consisting of benzotriazoles, cyanoacrylates, and hydroxybenzophenones and mixtures thereof, said ultraviolet radiation absorber being present at a level of from about 5 to about 10 weight percent based on the total weight of polyfunctional acrylate monomers, photoinitiators and UV radiation absorber present in the composition; and

(iii) a photoinitiator, said photoinitiator being 2-hydroxy-2,2-dimethylacetophenone, said photoinitiator being present at a level of from about 0.05 to about 10 weight percent based on the total weight of the polyfunctional acrylate monomer and photoinitiator present in the coating composition.

6. An ultraviolet radiation curable coating composition consisting of:

(i) at least one polyfunctional acrylate monomer;

(ii) at least one active ultraviolet radiation absorber selected from the group consisting of benzotriazoles, cyanoacrylates, and hydroxybenzophenones and mixtures thereof, said ultraviolet radiation absorber being present at a level of from about 5 to about 10 weight percent based on the total weight of polyfunctional acrylate monomers, photoinitiators and Uv radiation absorber present in the composition; and

(iii) a photoinitiator selected from the group consisting of 2-hydroxy-2,2-dimethylacetophenone, 1-hydroxy cyclohexane phenyl ketone, and 2,2-dimethoxy-2-phenylacetophenone, said photoinitiator being present at a level of from about 0.05 to about 10 weight percent based on the total weight of the polyfunctional acrylate monomer and photoinitiator present in the coating composition.