US5824736A
Expired / Lapsed
US
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Fluorosilicone rubber composition
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1993-09-21
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Granted: 1998-10-20
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Expires: 2013-09-21
Abstract
Abstract The present fluorosilicone rubber composition cures to give fluorosilicone rubber moldings with excellent physical properties. The fluorosilicone rubber composition comprises: (A) a 3,3,3-trifluoropropylmethylsiloxane-methylvinylsiloxane copolymer gum, (B) a dimethylsiloxane-methylvinylsiloxane copolymer gum, (C) a poly(3,3,3-trifluoropropylmethylsiloxane)-polydimethylsiloxane block copolymer or (C-2) a poly(3,3,3-trifluoropropylmethylsiloxane)-polydimethylsiloxane-polymethylvinylsiloxane block copolymer, (D) a reinforcing silica micropowder that has a surface area of at least 50 m2/g, and (E) a curing agent.
Inventors
- 👤 Hideki Kobayashi
- 👤 Wataru Nishiumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:47
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08L83/08
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
119 words
A fluorosilicone rubber composition, comprising: (A) 100 weight parts of a 3,3,3-trifluoropropylmethylsiloxane-methylvinylsiloxane copolymer gum having a concentration of methylvinylsiloxane unit in a range of about 0.001 to 5 mole percent, (B) 30 to 200 weight parts of a dimethylsiloxane-methylvinylsiloxane copolymer gum having a concentration of methylvinylsiloxane unit in a range of about 0.001 to 5 mole percent, (C) 0.5 to 20 weight parts of a poly(3,3,3-trifluoropropylmethylsiloxane)-polydimethylsiloxane block copolymer, (D) a reinforcing silica micropowder having a surface area of at least 50 m 2 /g, in an amount of 10 to 100 weight parts per 100 weight parts of the total of components (A), (B), and (C), and (E) a curing agent in a quantity sufficient to cure the composition.
Claim 2
Dependent Claim
119 words
A fluorosilicone rubber composition, comprising: (A) 100 weight parts of a 3,3,3-trifluoropropylmethylsiloxane-methylvinylsiloxane copolymer gum having a concentration of methylvinylsiloxane unit in a range of about 0.001 to 5 mole percent, (B) 30 to 200 weight parts of a dimethylsiloxane-methylvinylsiloxane copolymer gum having a concentration of methylvinylsiloxane unit in a range of about 0.001 to 5 mole percent, (C) 0.5 to 20 weight parts of a poly(3,3,3-trifluoropropylmethylsiloxane)-polydimethylsiloxane block copolymer, (D) a reinforcing silica micropowder having a surface area of at least 50 m 2 /g, in an amount of 10 to 100 weight parts per 100 weight parts of the total of components (A), (B), and (C), and (E) a curing agent in a quantity sufficient to cure the composition.
Claim 3
Dependent Claim
24 words
A composition according to claim 1, wherein the poly(3,3,3-trifluoropropylmethylsiloxane)-polydimethylsiloxane block copolymer has a degree of polymerization in a range of about 1,000 to 20,000.
Claim 4
Dependent Claim
27 words
A composition according to claim 1, wherein the poly(3,3,3-trifluoropropylmethylsiloxane)-polydimethylsiloxane block copolymer has a concentration of trifluoropropylmethylsiloxane unit in a range of about 20 to 80 mole percent.
Claim 5
Dependent Claim
26 words
A composition according to claim 1, wherein the reinforcing silica micropowder has a surface area in a range of about 100 to 400 m 2 /g.
Claim 6
Dependent Claim
23 words
A composition according to claim 1, wherein the reinforcing silica micropowder is in an amount in a range of 20 to 50 parts.
Claim 7
Dependent Claim
69 words
A composition-according to claim 1, wherein the poly(3,3,3-trifluoropropylmethylsiloxane)-polydimethylsiloxane block copolymer has a degree of polymerization in a range of about 1,000 to 20,000 and a concentration of trifluoropropylmethylsiloxane unit in a range of 20 to 80 mole percent, and the reinforcing silica micropowder is in an amount of 20 to 50 weight parts and has a surface area in the range of about 100 to 400 m 2 /g.
Claim 8
Dependent Claim
29 words
A composition according to claim 1, wherein the curing agent is an organoperoxide selected from a group consisting of benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, di-tert-butyl peroxide, tert-butylmonochlorobenzoyl peroxide, and 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane.
Claim 9
Dependent Claim
29 words
A composition according to claim 1, wherein the curing agent is a combination of a platinum catalyst and an organohydrogenpolysiloxane having at least 2 silicon-bonded hydrogen atoms per molecule.
Claim 10
Dependent Claim
38 words
A composition according to claim 1, further comprising a silanol-terminated diorganopolysiloxane, having a degree of polymerization in a range of about 1 to 100, selected from a group consisting of silanol-terminated dimethylpolysiloxane, silanol-terminated 3,3,3-trifluoropropylmethylpolysiloxane, and silanol-terminated dimethylsiloxane-3,3,3-trifluoropropylmethylsiloxane copolymer.
Claim 11
Dependent Claim
36 words
A composition according to claim 6, further comprising a silanol-terminated diorganopolysiloxane, having a degree of polymerization in a range of about 2-30, selected from a group consisting of silanol-terminated dimethylpolysiloxane, silanol-terminated 3,3,3-trifluoropropylmethylpolysiloxane, and silanol-terminated dimethylsiloxane-3,3,3-trifluoropropylmethylsiloxane copolymer.
Claim 12
Dependent Claim
119 words
A fluorosilicone rubber composition, comprising: (A) 100 weight parts of a 3,3,3-trifluoropropylmethylsiloxane-methylvinylsiloxane copolymer gum having a concentration of methylvinylsiloxane unit in a range of about 0.001 to 5 mole percent, (B) 30 to 200 weight parts of a dimethylsiloxane-methylvinylsiloxane copolymer gum having a concentration of methylvinylsiloxane unit in a range of about 0.001 to 5 mole percent, (C) 0.5 to 20 weight parts of a poly(3,3,3-trifluoropropylmethylsiloxane)-polydimethylsiloxane-polymethylvinylsiloxane block copolymer, (D) a reinforcing silica micropowder having a surface area of at least 50 m 2 /g, in an amount of 10 to 100 weight parts per 100 weight parts of the total of components (A), (B), and (C), and (E) a curing agent in a quantity sufficient to cure the composition.
Claim 13
Dependent Claim
119 words
A fluorosilicone rubber composition, comprising: (A) 100 weight parts of a 3,3,3-trifluoropropylmethylsiloxane-methylvinylsiloxane copolymer gum having a concentration of methylvinylsiloxane unit in a range of about 0.001 to 5 mole percent, (B) 30 to 200 weight parts of a dimethylsiloxane-methylvinylsiloxane copolymer gum having a concentration of methylvinylsiloxane unit in a range of about 0.001 to 5 mole percent, (C) 0.5 to 20 weight parts of a poly(3,3,3-trifluoropropylmethylsiloxane)-polydimethylsiloxane-polymethylvinylsiloxane block copolymer, (D) a reinforcing silica micropowder having a surface area of at least 50 m 2 /g, in an amount of 10 to 100 weight parts per 100 weight parts of the total of components (A), (B), and (C), and (E) a curing agent in a quantity sufficient to cure the composition.
Claim 14
Dependent Claim
24 words
A composition according to claim 11, wherein the poly(3,3,3-trifluoropropylmethylsiloxane)-polydimethylsiloxane-polymethylvinylsiloxane block copolymer has a degree of polymerization in a range of about 1,000 to 20,000.
Claim 15
Dependent Claim
28 words
A composition according to claim 11, wherein the poly(3,3,3-trifluoropropylmethylsiloxane)-polydimethylsiloxane-polymethylvinylsiloxane block copolymer has a concentration of 3,3,3- trifluoropropylmethylsiloxane unit in a range of about 20 to 80 mole percent.
Claim 16
Dependent Claim
26 words
A composition according to claim 11, wherein the reinforcing silica micropowder has a surface area in a range of about 100 to 400 m 2 /g.
Claim 17
Dependent Claim
23 words
A composition according to claim 11, wherein the reinforcing silica micropowder is in an amount in a range of 20 to 50 parts.
Claim 18
Dependent Claim
70 words
A composition according to claim 11, wherein the poly(3,3,3-trifluoropropylmethylsiloxane)-polydimethylsiloxane-polymethylvinylsiloxane block copolymer has a degree of polymerization in a range of about 1,000 to 20,000 and a concentration of trifluoropropylmethylsiloxane unit in a range of 20 to 80 mole percent, and the reinforcing silica micropowder is in an amount of 20 to 50 weight parts and has a surface area in the range of about 100 to 400 m 2 /g.
Claim 19
Dependent Claim
29 words
A composition according to claim 11, wherein the curing agent is an organoperoxide selected from a group consisting of benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, di-tert-butyl peroxide, tert-butylmonochlorobenzoyl peroxide, and 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane.
Claim 20
Dependent Claim
29 words
A composition according to claim 11, wherein the curing agent is a combination of a platinum catalyst and an organohydrogenpolysiloxane having at least 2 silicon-bonded hydrogen atoms per molecule.
Claim 21
Dependent Claim
38 words
A composition according to claim 11, further comprising a silanol-terminated diorganopolysiloxane, having a degree of polymerization in a range of about 1 to 100, selected from a group consisting of silanol-terminated dimethylpolysiloxane, silanol-terminated 3,3,3-trifluoropropylmethylpolysiloxane, and silanol-terminated dimethylsiloxane-3,3,3-trifluoropropylmethylsiloxane copolymer.
Claim 22
Dependent Claim
36 words
A composition according to claim 16, further comprising a silanol-terminated diorganopolysiloxane, having a degree of polymerization in a range of about 2-30, selected from a group consisting of silanol-terminated dimethylpolysiloxane, silanol-terminated 3,3,3-trifluoropropylmethylpolysiloxane, and silanol-terminated dimethylsiloxane-3,3,3-trifluoropropylmethylsiloxane copolymer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-10-19 | 2002-04-20 | 2002-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-19 | 2006-04-20 | 2006-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-19 | 2010-04-20 | 2010-10-20 | $7700.00 | Window Closed / Lapsed |