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US4978702A Expired / Lapsed US ⏱️ 0.0 years remaining

Coating composition

Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1988-08-26
•
Granted: 1990-12-18
•
Expires: 2008-08-26
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Abstract

Abstract A coating composition is disclosed which includes (A) 15 to 65% by weight (calculated as SiO2) of colloidal silica, a partially hydrolyzed and partially co-condensed product of the following component (B) and component (C): (B) 10 to 80% by weight (calculated as R1Si(OH)3) of a trialkoxysilane of the formula: R1Si(OR2)3 wherein the group R1 is methyl or vinyl and the group R2 is alkyl having 1 to 4 carbon atoms, (C) 1 to 50% by weight (calculated as R3nSi(OH)4-n) of an acetoxysilane of the formula: R3nSi(OCOCH3)4-n wherein the group R3 is alkyl having 1 to 3 carbon atoms, vinyl, phenyl, or mercaptoalkyl having 1 to 3 carbon atoms, and n is an integer of 0 to 2, provided that the total amount of the component (B) wherein the group R1 is methyl and the component (C) wherein the group R3 is methyl and n is 1 is in the range of from 10% by weight to less than 70% by weight based on the whole amount of the components (B) and (C), and (D) a solvent. The composition is useful for coating plastic articles and metallic articles to improve their surface properties such as surface hardness, chemical resistance, etc.

Inventors

  • 👤 Masahiro Yuyama
  • 👤 Masahiko Moritani
  • 👤 Mikio Futagami

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 04:18
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/04

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 152 words
A coating composition which comprises: (A) 15 to 65% by weight calculated as SiO 2 of colloidal silica; a partially hydrolyzed and partially co-condensed product of the following component (B) and component (C): (B) 10 to 80% by weight calculated as R 1 Si(OH) 3 of a trialkoxysilane of the formula: R 1 Si(OR 2 ) 3 wherein R 1 is methyl or vinyl and R 2 is alkyl having 1 to 4 carbon atoms; (C) 3 to 35% by weight calculated as R 3 .sub. n Si(OH) 4-n of an acetoxysilane of the formula: R 3 n Si(OCOCH 3 ) 4-n wherein R 3 is vinyl, and n is 1, provided that the amount of component (B) wherein R 1 is methyl is in the range of from 10% by weight to less than 70% by weight based on the whole amount of components (B) and (C): and (D) a solvent.
Claim 2
Dependent Claim 152 words
A coating composition which comprises: (A) 15 to 65% by weight calculated as SiO 2 of colloidal silica; a partially hydrolyzed and partially co-condensed product of the following component (B) and component (C): (B) 10 to 80% by weight calculated as R 1 Si(OH) 3 of a trialkoxysilane of the formula: R 1 Si(OR 2 ) 3 wherein R 1 is methyl or vinyl and R 2 is alkyl having 1 to 4 carbon atoms; (C) 3 to 35% by weight calculated as R 3 .sub. n Si(OH) 4-n of an acetoxysilane of the formula: R 3 n Si(OCOCH 3 ) 4-n wherein R 3 is vinyl, and n is 1, provided that the amount of component (B) wherein R 1 is methyl is in the range of from 10% by weight to less than 70% by weight based on the whole amount of components (B) and (C): and (D) a solvent.
Claim 3
Dependent Claim 42 words
The composition according to claim 1, wherein component (A) calculated as SiO 2 and component (B) calculated as R 1 Si(OH) 3 are incorporated in an amount of from 20 to 55% by weight and from 20 to 70% by weight, respectively.
Claim 4
Dependent Claim 12 words
The composition according to claim 1, further comprising a curing promoter catalyst.
Claim 5
Dependent Claim 35 words
The composition according to claim 3, wherein said curing promoter catalyst is selected from the group consisting of acids, organic amines, metal salts of organic carboxylic acids, metal thiocyanates, metal nitrites, and organic tin compounds.
Claim 6
Dependent Claim 10 words
The composition according to claim 1, further comprising a surfactant.
Claim 7
Dependent Claim 18 words
The composition according to claim 5, wherein said surfactant is a block copolymer of an alkyleneoxice and dimethylsiloxane.

References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-12-17 1994-06-18 1994-12-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-12-17 1998-06-18 1998-12-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-12-17 2002-06-18 2002-12-18 $7700.00 Window Closed / Lapsed

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