US4975472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable organopolysiloxane composition
Assignee: Momentive Performance Materials Japan LLC
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Filing: 1989-05-05
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Granted: 1990-12-04
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Expires: 2009-05-05
Abstract
Abstract A curable organopolysiloxane composition having condensation-curing properties and ultraviolet-curing properties, comprising (A) a diorganopolysiloxane having a viscosity of 50 to 200,000 cSt, both ends of each molecule thereof being blocked with a silanol group, (B) a silane compound, (C) an (alkyl)acrylic acid derivative, (D) a catalyst for condensation and (E) a sensitizer.
Inventors
- 👤 Tsuneo Motegi
- 👤 Yasuji Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:09
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/15; C08K5/151; C08K5/1515; C08K5/54; C08K5/544; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/16; C08G77/70; C08L2312/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
176 words
A curable organopolysiloxane composition comprising (A) 100 parts by weight of a diorganopolysiloxane having a viscosity as measured at 25° C. of 50 to 200,000 cSt, both ends of each molecule thereof being blocked with a silanol group, (B) 1 to 30 parts by weight of a silane compound represented by the formula (1): ##STR5## wherein R 1 represents a divalent hydrocarbon group, R 2 represents a monovalent hydrocarbon group, X represents a hydroxyl group or a hydrolyzable group, m is an integer of 0 to 4, and a is 0 or 1, (C) an (alkyl)acrylic acid derivative represented by the formula (2): ##STR6## wherein R 3 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and n is an integer of 1 to 10, the amount of said (alkyl)acrylic acid derivative being equal to or more than the amount of component (B) in terms of molar amount, (D) 0.0001 to 10 parts by weight of a catalyst for condensation, and (E) 0.01 to 20 parts by weight of a sensitizer.
Claim 2
Dependent Claim
176 words
A curable organopolysiloxane composition comprising (A) 100 parts by weight of a diorganopolysiloxane having a viscosity as measured at 25° C. of 50 to 200,000 cSt, both ends of each molecule thereof being blocked with a silanol group, (B) 1 to 30 parts by weight of a silane compound represented by the formula (1): ##STR5## wherein R 1 represents a divalent hydrocarbon group, R 2 represents a monovalent hydrocarbon group, X represents a hydroxyl group or a hydrolyzable group, m is an integer of 0 to 4, and a is 0 or 1, (C) an (alkyl)acrylic acid derivative represented by the formula (2): ##STR6## wherein R 3 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and n is an integer of 1 to 10, the amount of said (alkyl)acrylic acid derivative being equal to or more than the amount of component (B) in terms of molar amount, (D) 0.0001 to 10 parts by weight of a catalyst for condensation, and (E) 0.01 to 20 parts by weight of a sensitizer.
Claim 3
Dependent Claim
21 words
A composition as claimed in claim 1, wherein organic groups bonded to silicon atoms in component (A) are methyl or phenyl.
Claim 4
Dependent Claim
18 words
A composition as claimed in claim 1, wherein said hydrolyzable group in component (B) is alkoxy or alkenyloxy.
Claim 5
Dependent Claim
23 words
A composition as claimed in claim 1, wherein said catalyst for condensation of component (D) is an organotitanium compound and/or an organotin compound.
References Cited (Backward Citations)
US4526955A
Cited
US4623676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-03 | 1994-06-04 | 1994-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-03 | 1998-06-04 | 1998-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-03 | 2002-06-04 | 2002-12-04 | $7700.00 | Window Closed / Lapsed |