US5086141A
Expired / Lapsed
US
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Polysiloxane crosslinked styrene/butadiene copolymers
Assignee: Xerox Corp
•
Filing: 1990-04-30
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Granted: 1992-02-04
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Expires: 2010-04-30
Abstract
Abstract A crosslinked polysiloxane styrene/butadiene copolymer represented by the formula of FIG. 1 wherein m is a number of from about 2 to about 10; n is a number of from about 10 to about 1,000; k, l, o, p, q, r, s, t, u are weight fraction numbers totaling one with the sum of k+p+r+t being from about 0.35 to about 0.94; the sum of l+q+s+u being from about 0.05 to about 0.2 and o is from about 0.02 to about 0.5; R is CH 1 CH(R'), or alkylene - CR" C(O)O, where R' is an aromatic or substituted aromatic substituent and R" is hydrogen or an alkyl substituent.
Inventors
- 👤 Michael K. Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:27
CPC Classifications
C; C09; C09D; C09D155/00; C09D155/005; C08; C08G; C08G77/00; C08G77/42; C08G77/442; G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08702; G03G9/08737; G03G9/08742; G03G9/08773
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
122 words
A crosslinked polysiloxane styrene/butadiene copolymer represented by the following formula ##STR1## wherein m is a number of from about 2 to about 10; n is a number of from about 10 to about 1,000; k, l, o, p, q, r, s, t, u are weight fraction numbers totaling one with the sum of k+p+r+t being from about 0.35 to about 0.94; the sum of l+q+s+u being from about 0.05 to about 0.2 and o is from about 0.02 to about 0.5; R is CH 2 C(R') or alkylene-CR"C(O)O, where R' is an aromatic or a substituted aromatic substituent and R" is hydrogen or an alkyl substituent, and X is aryl, substituted aryl or alkyl, and Y is aryl, substituted aryl or alkyl.
Claim 2
Dependent Claim
122 words
A crosslinked polysiloxane styrene/butadiene copolymer represented by the following formula ##STR1## wherein m is a number of from about 2 to about 10; n is a number of from about 10 to about 1,000; k, l, o, p, q, r, s, t, u are weight fraction numbers totaling one with the sum of k+p+r+t being from about 0.35 to about 0.94; the sum of l+q+s+u being from about 0.05 to about 0.2 and o is from about 0.02 to about 0.5; R is CH 2 C(R') or alkylene-CR"C(O)O, where R' is an aromatic or a substituted aromatic substituent and R" is hydrogen or an alkyl substituent, and X is aryl, substituted aryl or alkyl, and Y is aryl, substituted aryl or alkyl.
Claim 3
Dependent Claim
24 words
A polysiloxane crosslinked copolymer in accordance with claim 1 wherein R' is an aromatic substituent of from about 6 to about 24 carbon atoms.
Claim 4
Dependent Claim
23 words
A polysiloxane crosslinked copolymer in accordance with claim 1 wherein R is a carboxylate substituent of from about 3 to about 10 carbons.
Claim 5
Dependent Claim
26 words
A polysiloxane crosslinked copolymer in accordance with claim 1 wherein alkyl for alkyl-CR"C(O)O and for the R" alkyl is from 1 to about 25 carbon atoms.
Claim 6
Dependent Claim
21 words
A polysiloxane crosslinked copolymer in accordance with claim 1 wherein R" is alkyl of from 1 to about 20 carbon atoms.
Claim 7
Dependent Claim
23 words
A polysiloxane crosslinked copolymer in accordance with claim 5 wherein the alkyl substituent R" contains from about 1 to about 10 carbon atoms.
Claim 8
Dependent Claim
32 words
A polysiloxane crosslinked copolymer in accordance with claim 6 wherein the alkyl substituent R" is selected from the group consisting of methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl and decyl.
Claim 9
Dependent Claim
19 words
A polysiloxane crosslinked copolymer in accordance with claim 1 which X and Y are aryl, substituted aryl or alkyl.
Claim 10
Dependent Claim
26 words
A polysiloxane crosslinked copolymer in accordance with claim 1 wherein the weight average molecular weight of the crosslinked copolymer is from about 90,000 to about 300,000.
Claim 11
Dependent Claim
17 words
A crosslinked polysiloxane in accordance with claim 1 that is prepared by a suspension free radical polymerization.
Claim 12
Dependent Claim
11 words
The polydimethylsiloxane crosslinked styrene/butadiene copolymer represented by the following formulas ##STR2##
Claim 13
Dependent Claim
11 words
The polydimethylsiloxane crosslinked styrene/butadiene copolymer represented by the following formulas ##STR2##
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-02-03 | 1995-08-05 | 1996-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-03 | 1999-08-05 | 2000-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-03 | 2003-08-05 | 2004-02-04 | $7700.00 | Window Closed / Lapsed |