Method of coating a plastic molding, ultraviolet-curable under coating for metal evaporation, and plastic moldings

• US 20020193526A1
• Filed: 05/24/2002
• Published: 12/19/2002
• Est. Priority Date: 05/25/2001
• Status: Active Grant

• Current Assignee: Nippon Paint Company Limited (Rainbow Light Limited)
• Original Assignee: Nippon Paint Company Limited (Rainbow Light Limited)
• Inventors: Takashima, Kazuhiko, Matsui, Sakae, Adachi, Yoichi, Ushio, Akira
• Granted Patent: US 6,916,508 B2
• Time in Patent Office: Days
• US Class Current: 525/214
• CPC Class Codes: B05D 2201/02 Polymeric substrate
• CPC Class Codes: B05D 3/067 Curing or cross-linking the coating
• CPC Class Codes: B05D 5/068 achieved by multilayers B05D5/066 takes precedence
• CPC Class Codes: C08F 212/08 Styrene
• CPC Class Codes: C08F 220/14 Methyl esters , e.g. methyl (meth)acrylate
• CPC Class Codes: C08F 220/1811 C10or C11-(Meth)acrylate, e.g. isodecyl (meth)acrylate, isobornyl (meth)acrylate or 2-naphthyl (meth)acrylate

Abstract

It is an object of the present invention to provide a method of coating a plastic molding which is appropriately applicable to various plastic substrates, an ultraviolet-curable under coating for metal evaporation, which is to be used in that method of coating, and a plastic molding obtained by that method of coating.

A method of coating a plastic molding comprising

steps of applying an ultraviolet-curable under coating for metal evaporation to a plastic substrate,

then subjecting the coated substrate to ultraviolet irradiation to form an under coating film,

evaporating a metal on the coating film and

applying a clear coating to the metal surface to form a clear coating film layer,

wherein the ultraviolet-curable under coating for metal evaporation comprises an acrylic resin comprising, as a constituent, at least one monomer (a) selected from among dicyclopentanyl (meth)acrylate, dicyclopentenyl (meth)acrylate and isobornyl (meth)acrylate, a compound having at least two (meth)acryloyl groups within the molecule, and a photopolymerization initiator.

Claims

1. A method of coating a plastic molding comprising

steps of applying an ultraviolet-curable under coating for metal evaporation to a plastic substrate,

then subjecting the coated substrate to ultraviolet irradiation to form an under coating film,

evaporating a metal on the coating film and

applying a clear coating to the metal surface to form a clear coating film layer,

wherein the ultraviolet-curable under coating for metal evaporation comprises an acrylic resin comprising, as a constituent, at least one monomer (a) selected from among dicyclopentanyl (meth)acrylate, dicyclopentenyl (meth)acrylate and isobornyl (meth)acrylate, a compound having at least two (meth)acryloyl groups within the molecule, and a photopolymerization initiator.

3. A plastic molding obtained by the method of coating according to claim 1.

2. An ultraviolet-curable under coating for metal evaporation

which comprises 20 to 70% by weight of an acrylic resin comprising 30 to 90% by weight of at least one monomer (a) selected from among dicyclopentanyl (meth)acrylate, dicyclopentenyl (meth)acrylate and isobornyl (meth)acrylate and 10 to 70% by weight of another polymerizable unsaturated monomer (b) as constituents and having a glass transition temperature (Tg) of 100 to 2000C and a solubility parameter (SP value) of 7.0 to 9.5,

30 to 80% by weight of a compound having at least two (meth)acryloyl groups within the molecule and

0.05 to 10% by weight of a chlorinated polyolefin and 2 to 15% by weight of a photopolymerization initiator, each based on the total weight of the acrylic resin and the compound having at least two (meth)acryloyl groups within the molecule.