US4293397A
Expired / Lapsed
US
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Photocurable organopolysiloxane compositions
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1980-02-08
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Granted: 1981-10-06
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Expires: 2000-02-08
Abstract
Abstract The present invention provides a novel photocurable organopolysiloxane composition having remarkably high photocurability as well as insensitiveness to the retarding effect of atmospheric oxygen and capable of giving a thick cured product with elasticity. The inventive composition comprises a reaction product of an amino-terminated diorganopolysiloxane and glycidyl acrylate or glycidyl methacrylate admixed with a photosensitizer.
Inventors
- 👤 Yasuhiko Sato
- 👤 Hiroshi Inomata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:18
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08L83/08; C08G; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C08G77/388; G; G03; G03F; G03F7/00; G03F7/004; G03F7/075; G03F7/0757
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
141 words
A photocurable organopolysiloxane composition which comprises (a) 100 parts by weight of an acryloyloxy-containing organopolysiloxane represented by the general formula ##STR13## where R 1 is a divalent hydrocarbon group, R 2 is a monovalent hydrocarbon group, X is a hydroxy group or a hydrolyzable group, k is zero or a positive integer not exceeding 4, m is a positive integer from 50 to 10,000, a is zero, 1 or 2 and at least two of the groups denoted by A in a molecule are each an acryloyloxy-containing group represented by the formula ##STR14## R 3 being a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms and n being a positive integer from 1 to 10, the remainder of A being each a hydrogen atom, and (b) from 0.1 to 30 parts by weight of a photosensitizer.
Claim 2
Dependent Claim
141 words
A photocurable organopolysiloxane composition which comprises (a) 100 parts by weight of an acryloyloxy-containing organopolysiloxane represented by the general formula ##STR13## where R 1 is a divalent hydrocarbon group, R 2 is a monovalent hydrocarbon group, X is a hydroxy group or a hydrolyzable group, k is zero or a positive integer not exceeding 4, m is a positive integer from 50 to 10,000, a is zero, 1 or 2 and at least two of the groups denoted by A in a molecule are each an acryloyloxy-containing group represented by the formula ##STR14## R 3 being a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms and n being a positive integer from 1 to 10, the remainder of A being each a hydrogen atom, and (b) from 0.1 to 30 parts by weight of a photosensitizer.
Claim 3
Dependent Claim
24 words
The photocurable organopolysiloxane composition as claimed in claim 1 wherein R 3 is a hydrogen atom or a methyl group and n is 1.
Claim 4
Independent Claim
144 words
A method for the preparation of a photocurable organopolysiloxane composition which comprises (a) reacting an amino-containing organopolysiloxane represented by the general formula ##STR15## where R 1 is a divalent hydrocarbon group, R 2 is a monovalent hydrocarbon group, X is a hydroxy group or a hydrolyzable group, k is zero or a positive integer not exceeding 4, m is a positive integer from 50 to 10,000 and a is zero, 1 or 2, with at least 2 moles, per mole of said organopolysiloxane, of a glycidyl-containing derivative of acrylic acid represented by the general formula, ##STR16## where R 3 is a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms and n is a positive integer from 1 to 10, to give an acryloyloxy-containing organopolysiloxane, and (b) admixing said acryloyloxy-containing organopolysiloxane with 0.1 to 30% by weight of a photosensitizer.
Claim 5
Independent Claim
144 words
A method for the preparation of a photocurable organopolysiloxane composition which comprises (a) reacting an amino-containing organopolysiloxane represented by the general formula ##STR15## where R 1 is a divalent hydrocarbon group, R 2 is a monovalent hydrocarbon group, X is a hydroxy group or a hydrolyzable group, k is zero or a positive integer not exceeding 4, m is a positive integer from 50 to 10,000 and a is zero, 1 or 2, with at least 2 moles, per mole of said organopolysiloxane, of a glycidyl-containing derivative of acrylic acid represented by the general formula, ##STR16## where R 3 is a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms and n is a positive integer from 1 to 10, to give an acryloyloxy-containing organopolysiloxane, and (b) admixing said acryloyloxy-containing organopolysiloxane with 0.1 to 30% by weight of a photosensitizer.
References Cited (Backward Citations)
US3865588A
Cited
US4026826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |