US5216104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable silicone rubber compositions and products of curing thereof
Assignee: Shin-Etsu Chemical Co Ltd
•
Filing: 1990-07-17
•
Granted: 1993-06-01
•
Expires: 2010-07-17
Abstract
Abstract An addition-type silicone rubber composition comprising (a) an organopolysiloxane containing at least two alkenyl groups bonded to the silicon atoms in one molecule, (b) an organopolysiloxane containing one alkenyl group bonded to the silicon atom in one molecule on an average, (c) an organohydrogenpolysiloxane containing at least two hydrogen atoms bonded to the silicon atoms, (d) a platinum catalyst; and a product of curing the composition. This silicone rubber composition can give a low-modulus silicone rubber by curing which neither contaminates the material in contact therewith nor deforms owing to shrinkage, without hindering the adhesion of the composition during its curing stage.
Inventors
- 👤 Takehide Okami
- 👤 Hironao Fujiki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:54
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
110 words
An addition-type curable silicone rubber composition comprising: (a) 100 parts by weight of an organopolysiloxane or organopolysiloxanes containing at least two alkenyl groups bonded to the silicon atoms in one molecule, (b) 3 to 70 parts by weight of an organopolysiloxane or organopolysiloxanes containing one alkenyl group bonded to the silicon atom in one molecule on an average, (c) an organohydrogenpolysiloxane containing at least two hydrogen atoms bonded to the silicon atoms in one molecule in an amount to provide 0.5 to 5 hydrogen atoms bonded to the silicon atoms per one alkenyl group of the components (a) and (b), (d) a catalytic amount of platinum or a platinum compound.
Claim 2
Dependent Claim
110 words
An addition-type curable silicone rubber composition comprising: (a) 100 parts by weight of an organopolysiloxane or organopolysiloxanes containing at least two alkenyl groups bonded to the silicon atoms in one molecule, (b) 3 to 70 parts by weight of an organopolysiloxane or organopolysiloxanes containing one alkenyl group bonded to the silicon atom in one molecule on an average, (c) an organohydrogenpolysiloxane containing at least two hydrogen atoms bonded to the silicon atoms in one molecule in an amount to provide 0.5 to 5 hydrogen atoms bonded to the silicon atoms per one alkenyl group of the components (a) and (b), (d) a catalytic amount of platinum or a platinum compound.
Claim 3
Dependent Claim
32 words
The silicone rubber composition as defined in claim 1 further comprising an inorganic filler in an amount not exceeding 600 parts by weight per 100 parts by weight of the component (a).
Claim 4
Dependent Claim
36 words
The silicone rubber composition as defined in claim 1 wherein the amount of the organopolysiloxane or organopolysiloxanes of component (b) is 5 to 50 parts by weight per 100 parts by weight of the component (a).
Claim 5
Dependent Claim
43 words
The silicone rubber composition as defined in claim 1 wherein the amount of the organohydrogenpolysiloxane of the component (c) is chosen to provide 1.0 to 3.0 hydrogen atoms bonded to the silicon atoms per one alkenyl group of the components (a) and (b).
Claim 6
Dependent Claim
58 words
The silicone rubber composition as defined in claim 1 wherein the organopolysiloxane or organopolysiloxanes of the component (a) is an organopolysiloxane or organopolysiloxanes of substantially straight-chain molecular structure having a viscosity within the range between 100 and 1,000,000 cSt at 25° C., and the remaining groups bonded to the silicon atoms are unsubstituted or substituted monovalent hydrocarbon groups.
Claim 7
Dependent Claim
58 words
The silicone rubber composition as defined in claim 1 wherein the organopolysiloxane or organopolysiloxanes of the component (b) is an organopolysiloxane or organopolysiloxanes of substantially straight-chain molecular structure having a viscosity within the range between 20 and 200,000 cSt at 25° C., and the remaining groups bonded to the silicon atoms are unsubstituted or substituted monovalent hydrocarbon groups.
Claim 8
Dependent Claim
30 words
The silicone rubber composition as defined in claim 1 or 5 wherein the alkenyl group of the organopolysiloxane or orqanopolysiloxanes of the component (a) is a vinyl or allyl group.
Claim 9
Dependent Claim
30 words
The silicone rubber composition as defined in claim 1 or 6 wherein the alkenyl group of the organopolysiloxane or organopolysiloxanes of the component (b) is a vinyl or allyl group.
Claim 10
Dependent Claim
51 words
The silicone rubber composition as defined in claim 1 or 2 further comprising an organopolysiloxane of a resin structure comprising SiO 2 units, (CH 2 ═CH)(R') 2 SiO 0 .5 units, and R' 3 SiO 0 .5 units where R' is a monovalent hydrocarbon group having no unsaturated aliphatic hydrocarbon groups.
Claim 11
Dependent Claim
79 words
The silicone rubber composition as claimed in claim 1 or 2 further comprising an organopolysiloxane comprising (CH 2 ═CH)(R"SiO units, where R" is a monovalent hydrocarbon group having no unsaturated aliphatic hydrocarbon groups, and acetylene compound or a heavy metal ionic compound for controlling the curing rate of the silicone rubber composition wherein said heavy metal ionic compound is a compound selected from the group consisting of stannous salts, mercuric salts, bismuth (+3) salts, cupric salts and cuprous salts.
Claim 12
Dependent Claim
15 words
A product of curing the silicone rubber composition as defined in claim 1 or 2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-31 | 2004-11-30 | 2005-06-01 | $7700.00 | Window Closed / Lapsed |