Anti-fogging coating composition, product coated with said composition and method for preparation of said product

• US 5,480,917 A
• Filed: 12/29/1994
• Issued: 01/02/1996
• Est. Priority Date: 11/19/1987
• Status: Expired due to Fees

• Current Assignee: Saint-Gobain Vitrage
• Original Assignee: Saint-Gobain Vitrage
• Inventors: Chartier, Pascal, Kruger, Albert A.
• Primary Examiner(s): Chapman, Mark A.
• Application Number:
  US08/366,016
• Time in Patent Office: 369 Days
• Field of Search: 522/33, 522/181, 522/182, 522/183, 523/169
• US Class Current: 522/33
• CPC Class Codes: C09K 3/18 for application to surfaces to minimize adherence of ice, mist or water thereto rendering particulate materials free flowing, in general, e.g. making them hydrophobic B01J2/30; Thawing or antifreeze materials for application to surfaces used in liquids for heat-transfer, heat-exchange or heat-storage or for the production of heat or cold other than by combustion, e.g. radiator liquids, C09K5/00
• CPC Class Codes: Y10T 428/31544 Addition polymer is perhalogenated
• CPC Class Codes: Y10T 428/31645 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31935 Ester, halide or nitrile of addition polymer

Abstract

An anti-fogging coating comprises from 40 to 80% by weight of at least one acrylic or methacrylic acid monomer, from 20 to 60% by weight of at least one short chain acrylic or methacrylic acid ester monomer and, in relation to the total weight of the preceding monomers, from 1 to 15% of a crosslinking agent and from 0.1 to 5% of a polymerization initiator compound using the action of ultraviolet radiation. Transparent products formed from a glass or poly(methyl methacrylate) support and a layer of the preceding composition, polymerized and crosslinked by the action of ultraviolet radiation, exhibit good anti-fogging and mechanical resistance properties.

Claims

1. A curable composition for preparation of an anti-fogging, scratch-resistant coating consisting essentially of components (A), (B), (C) and (D), on the basis of components (A) and (B) totaling 100%, by weight:

Component (A) from 40-60% by weight of at least one of acrylic or methacrylic acid,

Component (B) from 60-40% by weight of at least one acrylic or methacrylic acid ester monomer of the formula ##STR2## wherein R is H or CH₃ and R¹ is a C_1-4 alkyl, Component (C) from 1-15% by weight, based on the total weight of monomers (A) and (B), of a crosslinking agent selected from the group consisting of 1,4-butanediol diacrylate, trimethylol propane triacrylate, dipetaerythritol pentaacrylate, tripropyleneglycol diacrylate, diethyleneglycol diacrylate and mixtures thereof,

Component (D) from 0.1-5% by weight, based on the total weight of monomers (A) and (B), of a polymerization initiator using the action of ultraviolet radiation.

2. The composition in accordance with claim 1, wherein the polymerization initiator is selected from the group consisting of benzildimethylketal, 1-hydroxy-1-cyclohexylphenylketone, benzophenone and 2-methyl-1-[4-(methy-1-thio) phenyl]-2-morpholinopropan-1-one.

3. The composition in accordance with claim 1, comprising from 50 to 60% by weight of monomers (A), from 50 to 40% by weight of monomers (B), and, based on the total weight of monomers (A) and (B), from 5 to 10% by weight of crosslinking agent and 0.1 to 0.5% of polymerization initiator.