Composition for coating

• US 4,555,545 A
• Filed: 02/01/1985
• Issued: 11/26/1985
• Est. Priority Date: 02/09/1984
• Status: Expired due to Term

• Current Assignee: Toshiba Silicone Co., Ltd. (General Electric Company)
• Original Assignee: Toshiba Silicone Co., Ltd. (General Electric Company)
• Inventors: Kimura, Hiroshi, Mori, Ikurou, Murai, Bunjirou
• Primary Examiner(s): Marquis, Melvyn I.
• Application Number:
  US06/697,358
• Time in Patent Office: 298 Days
• Field of Search: 524/588, 524/858, 524/859, 528/26, 528/28, 528/29, 528/16
• US Class Current: 524/858
• CPC Class Codes: C08L 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• CPC Class Codes: C08L 2666/54 Inorganic substances
• CPC Class Codes: C09D 183/04 Polysiloxanes

Abstract

A composition for coating, which comprises:

(1) 100 parts by weight of film forming components comprising:

(A) 10 to 90% by weight of an organosilane triol of the following formula and/or its partial condensate:

R.sup.1 Si(OH).sub.3

wherein R¹ represents a monovalent group selected from the group consisting of alkyl groups having 1 to 3 carbon atoms and aryl groups, and

(B) 90 to 10% by weight of colloidal silica; and

(2) 5 to 40 parts by weight of a copolymer of:

(C) a compound represented by the formula: ##STR1## wherein Q represents >C═O or the following formula: ##STR2## wherein each X may be either the same or different and each represents hydrogen atom or hydroxyl group, of which at least one is hydroxyl group, and R² represents an alkyl group having 1 to 18 carbon atoms, and

(D) an epoxy group-containing trialkoxysilane.

Claims

1. A composition for coating, which comprises:

(1) 100 parts by weight of film forming components comprising;

(A) 10 to 90% by weight of an organosilane triol of the following formula and/or its partial condensate;

space="preserve" listing-type="equation">R.sup.1 Si(OH).sub.3

wherein R¹ represents a monovalent group selected from the group consisting of alkyl groups having 1 to 3 carbon atoms and aryl groups, and

(B) 90 to 10% by weight of colloidal silica; and

(2) 5 to 40 parts by weight of a copolymer of;

(C) a compound represented by the formula;

##STR9## wherein Q represents >

C═

O or the following formula;

##STR10## wherein each X may be either the same or different and each represents hydrogen atom or hydroxyl group, of which at least one is hydroxyl group, and R² represents an alkyl group having 1 to 18 carbon atoms, and

(D) an epoxy group-containing trialkoxysilane.

2. The composition for coating according to claim 1, wherein Component (C) is 2,4-dihydroxybenzophenone.

3. The composition for coating according to claim 1, wherein Component (D) is γ

-glycidoxypropyltrimethoxysilane or β

-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

4. The composition for coating according to claim 1, wherein Component (2) is added in an amount of 15 to 30 parts by weight.