Patent US3355922A successfully refreshed from Google Patents.
Patent US5244967A successfully refreshed from Google Patents.
US5244967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone rubber composition and silicone rubber
Assignee: Shin-Etsu Chemical Co Ltd
•
Filing: 1990-10-10
•
Granted: 1993-09-14
•
Expires: 2010-10-10
Abstract
Abstract Silicone rubber compositions based on an organopolysiloxane are improved in release properties by blending a silane having both a fluorinated hydrocarbon group and an alkanoyloxy group and/or an organopolysiloxane having an alkanoyloxy or alkanoyloxyalkyl group.
Inventors
- 👤 Yoshio Inoue
- 👤 Masaharu Takahashi
- 👤 Ken-ichi Takita
- 👤 Takeo Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:29
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08K; C08K5/00; C08K5/54; C08K5/5406; C08K5/541; C08K5/5415; C08K5/5419; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/16
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
250 words
A silicone rubber composition comprising (A) 100 parts by weight of an organopolysiloxane having the following average composition formula: R.sup.1.sub.a SiO.sub.(4-a)/2 ( 1) wherein R 1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and letter a is a positive number of from 1.95 to 2.05, said organopolysiloxane being end blocked with a triorganosilyl or hydroxy group, (B) 0.03 to 5 parts by weight of at least one member selected from the class consisting of (B-i) a silane having the general formula: ##STR18## wherein Rf is a monovalent hydrocarbon group having at least 3 carbon atoms with at least one hydrogen atom substituted with a fluorine atom, R 2 is an unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms, R 3 is a substituted or unsubstituted monovalent hydrocarbon group having 5 to 20 carbon atoms, letter b is equal to 1 or 2, c is equal to 0, 1 or 2, d is equal to 1 or 2, and (b+c+d)=4 and (B-ii) an organopolysiloxane having the following average, composition formula: ##STR19## wherein R 4 is a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms, R 5 is a substituted or unsubstituted monovalent hydrocarbon group having 5 to 30 carbon atoms, f/e ranges from 1/1 to 1/50, 1.95≦(e+f)<4, and g is an integer of from 0 to 10, and (C) 0.1 to 5 parts by weight of an organic peroxide per 100 parts by weight of component (A).
Claim 2
Dependent Claim
250 words
A silicone rubber composition comprising (A) 100 parts by weight of an organopolysiloxane having the following average composition formula: R.sup.1.sub.a SiO.sub.(4-a)/2 ( 1) wherein R 1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and letter a is a positive number of from 1.95 to 2.05, said organopolysiloxane being end blocked with a triorganosilyl or hydroxy group, (B) 0.03 to 5 parts by weight of at least one member selected from the class consisting of (B-i) a silane having the general formula: ##STR18## wherein Rf is a monovalent hydrocarbon group having at least 3 carbon atoms with at least one hydrogen atom substituted with a fluorine atom, R 2 is an unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms, R 3 is a substituted or unsubstituted monovalent hydrocarbon group having 5 to 20 carbon atoms, letter b is equal to 1 or 2, c is equal to 0, 1 or 2, d is equal to 1 or 2, and (b+c+d)=4 and (B-ii) an organopolysiloxane having the following average, composition formula: ##STR19## wherein R 4 is a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms, R 5 is a substituted or unsubstituted monovalent hydrocarbon group having 5 to 30 carbon atoms, f/e ranges from 1/1 to 1/50, 1.95≦(e+f)<4, and g is an integer of from 0 to 10, and (C) 0.1 to 5 parts by weight of an organic peroxide per 100 parts by weight of component (A).
Claim 3
Dependent Claim
54 words
The silicone rubber composition of claim 1 wherein R 1 of formula (1) is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms selected from the class consisting of alkyl, aryl, aralkyl and halogen or cyano substituted derivatives thereof, letter a is a positive number of from 1.98 to 2.02.
Claim 4
Dependent Claim
48 words
The silicone rubber composition of claim 1 wherein R 1 of formula (1) is selected from the class consisting of methyl, ethyl, propyl, butyl, vinyl, allyl, butenyl, phenyl, tolyl, benzyl, β-phenylethyl, chloromethyl, chloropropyl, 3,3,3-trifluoropropyl and 2-cyanoethyl, and letter a is a positive number of from 1.95 to 2.05.
Claim 5
Dependent Claim
23 words
The silicone rubber composition of claim 1 wherein aid organopolysiloxane being end blocked with a trimethylsilyl, dimethylvinylsilyl, methylphenylsilyl, methyldiphenylsilyl, methylvinylsilyl or trivinylsilyl group.
Claim 6
Dependent Claim
81 words
The silicone rubber composition of claim 1 wherein in formula (2), R f is 3,3,3-trifluoropropyl, C 4 F 9 C 2 H 4 -- or C 7 F 15 C 2 H 4 --, R 2 is methyl, propyl, butyl, hexyl, cyclohexyl, vinyl, allyl or phenyl and R 3 is C 7 H 15 --, C 9 H 19 --, C 13 H 19 --, C 13 H 27 --, C 17 H 33 -- or C 17 H 35 --.
Claim 7
Dependent Claim
31 words
The silicone rubber composition of claim 1 wherein in formula (3), R 4 is a hydrogen atom, a methyl, ethyl, propyl, butyl, hexyl, cyclohexyl, phenyl, vinyl, allyl, nitrile or 3,3,3-trifluoropropyl group.
Claim 8
Dependent Claim
43 words
The silicone rubber composition of claim 1 wherein the silane of formula (2) is one having the following formula: ##STR20## wherein Rf is as defined above and R 3' is a substituted or unsubstituted monovalent hydrocarbon radical having 7 to 20 carbon atoms.
Claim 9
Dependent Claim
51 words
The silicone rubber composition of claim 1 wherein the organopolysiloxane of formula (3) is one having the following formula: ##STR21## wherein Me is methyl, R 5' is a substituted or unsubstituted monovalent hydrocarbon group having 7 to 20 carbon atoms, and n is a positive number of from 1 to 10.
Claim 10
Dependent Claim
60 words
The silicone rubber composition of claim 1 wherein the organopolysiloxane of formula (3) is one having the following formula: ##STR22## wherein Me is methyl, R 5' is a substituted or unsubstituted monovalent hydrocarbon group having 7 to 20 carbon atoms, and l and m are positive numbers, l/m ranges from 1/1 to 10, and l ranges from 1 to 100.
Claim 11
Dependent Claim
60 words
The silicone rubber composition of claim 1 wherein the organopolysiloxane of formula (3) is one having the following formula: ##STR23## wherein Me is methyl, R 5' is a substituted or unsubstituted monovalent hydrocarbon group having 7 to 20 carbon atoms, and p and q are positive numbers, q/p ranges from 2/1 to 20, and q ranges from 0.01 to 100.
Claim 12
Dependent Claim
69 words
The silicone rubber composition of claim 1 wherein the organopolysiloxane of formula (3) is one having the following formula: ##STR24## wherein Me is methyl, R 5' is a substituted or unsubstituted monovalent hydrocarbon group having 7 to 20 carbon atoms, k is an integer of from 1 to 10, r, s and t are positive numbers, t/(r+s) ranges from 2/1 to 1/10, and t ranges from 1 to 100.
Claim 13
Dependent Claim
25 words
The silicone rubber composition of claim 1, comprising 100 parts by weight of component (A) and 0.03 to 5 parts by weight of component (B).
Claim 14
Dependent Claim
31 words
The silicone rubber composition of claim 1 which further comprises a silica filler in an amount of 5 to 500 parts by weight per 100 parts by weight of component (A).
Claim 15
Dependent Claim
11 words
A silicone rubber obtained by vulcanizing the composition of claim 1.
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) | 1996-09-13 | 1997-03-15 | 1997-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-13 | 2001-03-15 | 2001-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-13 | 2005-03-15 | 2005-09-14 | $7700.00 | Window Closed / Lapsed |