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US4943613A
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Photocurable organopolysiloxane composition
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1989-05-26
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Granted: 1990-07-24
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Expires: 2009-05-26
Abstract
Abstract The photocurable organopolysiloxane composition is curable by irradiation with ultraviolet light into a rubbery elastomer which is excellently adhesive to the surface of the substrate on which it has been cured. The composition comprises an organopolysiloxane having, in a molecule, at least one acryloxy-functional group represented by the general formula [CH2=CR1-CO-O-(CH2)a-SiR2-O-]b(R)3-bSi-R2-, in which R1 is a hydrogen atom or a methyl group, each R is a monovalent hydrocarbon group, R2 is an oxygen atom or a divalent hydrocarbon group and each of the subscripts a and b is 1, 2 or 3, as the principal ingredient together with an acryloxy-containing trialkoxy silane represented by the general formula (R3O)3Si-R4-(NH-CO-O-R4)c-O-CO-CR1=CH2, in which each R3 is a monovalent hydrocarbon group, each R4 is a divalent hydrocarbon group having 1 to 20 carbon atoms, R1 has the same meaning as defined above and the subscript c is zero or 1, acrylic or methacrylic acid and a photosensitizer.
Inventors
- 👤 Masatoshi Arai
- 👤 Kazutoshi Fujioka
- 👤 Masaharu Satou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:28
CPC Classifications
C; C09; C09D; C09D4/00; C09D4/06; C08; C08F; C08F290/00; C08F290/02; C08F290/06; C08F290/068; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/54; C08K5/541; C08K5/5425; C09J; C09J4/00; C09J4/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
205 words
A photocurable organopolysiloxane composition which comprises, in admixture: (a) 100 parts by weight of an organopolysiloxane having, in a molecule, at least one acryloxy-functional group represented by the general formula [CH.sub.2 ═CR.sup.1 --CO--O--(CH.sub.2).sub.a --SiR.sub.2 --O--].sub.b (R).sub.3-b Si--R.sup.2 --, in which R 1 is a hydrogen atom or a methyl group, each R is a monovalent hydrocarbon group independently from the others, R 2 is an oxygen atom or a divalent hydrocarbon group and each of the subscripts a and b is 1, 2 or 3; (b) from 0.01 to 10 parts by weight of an acryloxy-containing trialkoxy silane represented by the general formula (R.sup.3 O).sub.3 Si--R.sup.4 --(NH--CO--O--R.sup.4).sub.c --O--CO--CR.sup.1 ═CH.sub.2, in which each R is a monovalent hydrocarbon group having 1 to 8 carbon atoms, each R 1 is a divalent hydrocarbon group having 1 to 20 carbon atoms independently from the others, R 1 has the same meaning as defined above and the subscript c is zero or 1; (c) from 0.01 to 10 parts by weight of a carboxylic acid represented by the general formula R.sup.5 --CO--OH, in which R 5 is a monovalent hydrocarbon group having 1 to 20 carbon atoms; and (d) from 0.01 to 10 parts by weight of a photosensitizer.
Claim 2
Dependent Claim
205 words
A photocurable organopolysiloxane composition which comprises, in admixture: (a) 100 parts by weight of an organopolysiloxane having, in a molecule, at least one acryloxy-functional group represented by the general formula [CH.sub.2 ═CR.sup.1 --CO--O--(CH.sub.2).sub.a --SiR.sub.2 --O--].sub.b (R).sub.3-b Si--R.sup.2 --, in which R 1 is a hydrogen atom or a methyl group, each R is a monovalent hydrocarbon group independently from the others, R 2 is an oxygen atom or a divalent hydrocarbon group and each of the subscripts a and b is 1, 2 or 3; (b) from 0.01 to 10 parts by weight of an acryloxy-containing trialkoxy silane represented by the general formula (R.sup.3 O).sub.3 Si--R.sup.4 --(NH--CO--O--R.sup.4).sub.c --O--CO--CR.sup.1 ═CH.sub.2, in which each R is a monovalent hydrocarbon group having 1 to 8 carbon atoms, each R 1 is a divalent hydrocarbon group having 1 to 20 carbon atoms independently from the others, R 1 has the same meaning as defined above and the subscript c is zero or 1; (c) from 0.01 to 10 parts by weight of a carboxylic acid represented by the general formula R.sup.5 --CO--OH, in which R 5 is a monovalent hydrocarbon group having 1 to 20 carbon atoms; and (d) from 0.01 to 10 parts by weight of a photosensitizer.
Claim 3
Dependent Claim
23 words
The photocurable organopolysiloxane composition as claimed in claim 1 wherein the carboxylic acid as the component (c) is acrylic acid or methacrylic acid.
Claim 4
Dependent Claim
53 words
The photocurable organopolysiloxane composition as claimed in claim 1 wherein the organopolysiloxane as the component (a) has two acryloxy functional groups represented by the general formula [CH.sub.2 ═CR.sup.1 --CO--O--(CH.sub.2).sub.a --SiR.sub.2 --O--].sub.b (R).sub.3-b Si--R.sup.2 --, in which each symbol has the same meaning as defined above, each at one of the molecular chain ends.
Claim 5
Dependent Claim
19 words
The photocurable organopolysiloxane composition as claimed in claim 1 wherein the group denoted by R is a methyl group.
References Cited (Backward Citations)
US4201808A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |