Patent US4558112A successfully refreshed from Google Patents.
US4558112A
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US
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Low oiling gel filled articles, siloxane gels and liquids therefor, and methods for producing same
Assignee: Roche Diagnostics Corp
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Filing: 1981-06-05
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Granted: 1985-12-10
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Expires: 2001-06-05
Abstract
Abstract A low oiling gel filled article comprising a polydiorganosiloxane gel contained within a polysiloxane rubber envelope. The gel is characterized as being the addition product of a first prepolymer having silicon-bonded additional radicals on a terminal silicon atom, and a second prepolymer having silicon-bonded addition radicals on several intermediate silicon atoms. The polydiorganosiloxane prepolymers, and complex fluid, as well as processes for making same, are also disclosed herein.
Inventors
- 👤 Thomas D. Talcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:50
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/44; A; A61; A61L; A61L27/00; A61L27/14; A61L27/18; C08G77/04; C08G77/32; C08G77/34; C08L; C08L83/00; C08L83/04; C08G77/12; C08G77/20; C08G77/70
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
163 words
An essentially polyfunctional polydiorganosiloxane compound comprising: ##STR8## in which: R 6 and R 7 are alkyl radicals having from 1 to about 6 carbon atoms; n is an integer between about 50 and about 400, each R 6 and R 7 being independently selected for each of the n groups; R 8 is an alkyl radical having from 1 to about 6 carbon atoms; R 9 is an alkylene radical having from 2 to about 6 carbon atoms; p is an integer from 1 to about 20, each R 8 and R 9 being independently selected for each of the p groups, the n and p groups being randomly interspersed along the compound provided that the p groups appear together in multiples of 3; and R 10 , R 11 and R 12 are selected from the group consisting of: an alkylene radical having from 2 to about 6 carbon atoms, and an alkyl radical having from 1 to about 6 carbon atoms.
Claim 2
Dependent Claim
163 words
An essentially polyfunctional polydiorganosiloxane compound comprising: ##STR8## in which: R 6 and R 7 are alkyl radicals having from 1 to about 6 carbon atoms; n is an integer between about 50 and about 400, each R 6 and R 7 being independently selected for each of the n groups; R 8 is an alkyl radical having from 1 to about 6 carbon atoms; R 9 is an alkylene radical having from 2 to about 6 carbon atoms; p is an integer from 1 to about 20, each R 8 and R 9 being independently selected for each of the p groups, the n and p groups being randomly interspersed along the compound provided that the p groups appear together in multiples of 3; and R 10 , R 11 and R 12 are selected from the group consisting of: an alkylene radical having from 2 to about 6 carbon atoms, and an alkyl radical having from 1 to about 6 carbon atoms.
Claim 3
Dependent Claim
13 words
The compound of claim 1 in which R 9 is a vinyl radical.
Claim 4
Dependent Claim
38 words
The compound of claim 2 in which essentially each R 6 , R 7 and R 8 is independently selected, for each of the n and p groups, from the group consisting of: methyl, ethyl and propyl radicals.
Claim 5
Dependent Claim
21 words
The compound of claim 3 in which essentially each R 6 , R 7 and R 8 is a methyl radical.
Claim 6
Dependent Claim
30 words
The compound of claim 4 in which each of R 10 , R 11 and R 12 is selected from the group consisting of: vinyl, methyl, ethyl and propyl radicals.
Claim 7
Dependent Claim
38 words
The compound of claim 1 in which essentially each R 6 , R 7 and R 8 is independently selected, for each of the n and p groups, from the group consisting of: methyl, ethyl and propyl radicals.
Claim 8
Dependent Claim
30 words
The compound of claim 6 in which each of R 10 , R 11 and R 12 is selected from the group consisting of: vinyl, methyl, ethyl and propyl radicals.
Claim 9
Dependent Claim
52 words
The compound of claim 7 in which essentially each R 6 , R 7 and R 8 is a methyl radical, R 9 is a vinyl radical, and each of R 10 , R 11 and R 12 is selected from the group consisting of: a vinyl radical and a methyl radical.
Claim 10
Dependent Claim
245 words
A polydiorganosiloxane compound comprising: ##STR9## in which: essentially each R 13 and R 14 is an alkyl radical having from 1 to about 6 carbon atoms; r is an integer between about 50 and about 400, each R 13 and R 14 being independently selected for each of the r groups; R 15 and R 15' are alkyl radical having from 1 to about 6 carbon atoms; R 16' is a divalent alkyl radical having from about 2 to about 6 carbon atoms; R 16 , is an alkylene radical having from 2 to about 6 carbon atoms; R 22 and R 23 are alkyl radicals having from 1 to about 6 carbon atoms; t is an integer between about 50 and about 300, each R 22 and R 23 being independently selected for each of the t groups; R 20 and R 21 are alkyl radicals having from 1 to about 6 carbon atoms; s is an integer from about 1 to about 20, each R 15 , R 16 , R 20 , R 21 , R 22 , R 23 and t being independently selected for each of the s groups, the r and s groups being randomly interspersed along the compound; and R 17 , R 18 and R 19 are selected from the group consisting of: hydrogen, an alkylene radical having from 2 to about 6 carbon atoms, and an alkyl radical having from 1 to about 6 carbon atoms.
Claim 11
Dependent Claim
245 words
A polydiorganosiloxane compound comprising: ##STR9## in which: essentially each R 13 and R 14 is an alkyl radical having from 1 to about 6 carbon atoms; r is an integer between about 50 and about 400, each R 13 and R 14 being independently selected for each of the r groups; R 15 and R 15' are alkyl radical having from 1 to about 6 carbon atoms; R 16' is a divalent alkyl radical having from about 2 to about 6 carbon atoms; R 16 , is an alkylene radical having from 2 to about 6 carbon atoms; R 22 and R 23 are alkyl radicals having from 1 to about 6 carbon atoms; t is an integer between about 50 and about 300, each R 22 and R 23 being independently selected for each of the t groups; R 20 and R 21 are alkyl radicals having from 1 to about 6 carbon atoms; s is an integer from about 1 to about 20, each R 15 , R 16 , R 20 , R 21 , R 22 , R 23 and t being independently selected for each of the s groups, the r and s groups being randomly interspersed along the compound; and R 17 , R 18 and R 19 are selected from the group consisting of: hydrogen, an alkylene radical having from 2 to about 6 carbon atoms, and an alkyl radical having from 1 to about 6 carbon atoms.
Claim 12
Dependent Claim
42 words
The compound of claim 9 in which essentially each R 13 , R 14 , R 15 , R 20 , R 21 , R 22 and R 23 is independently selected from the group consisting of: methyl, ethyl and propyl radicals.
Claim 13
Dependent Claim
33 words
The compound of claim 10 in which essentially each R 13 , R 14 , R 15 , R 20 , R 21 , R 22 and R 23 is a methyl radical.
Claim 14
Dependent Claim
20 words
The compound of claim 11 in which R 16 is an ethyl radical and R 16' is a vinyl radical.
Claim 15
Dependent Claim
27 words
The compound of claim 9 in which essentially each R 13 and R 14 is independently selected from the group consisting of: methyl, ethyl and propyl radicals.
Claim 16
Dependent Claim
24 words
The compound of claim 9 in which essentially each R 15 is independently selected from the group consisting of: methyl, ethyl and propyl radicals.
Claim 17
Dependent Claim
27 words
The compound of claim 14 in which essentially each R 13 and R 14 is independently selected from the group consisting of: methyl, ethyl and propyl radicals.
Claim 18
Dependent Claim
27 words
The compound of claim 9 in which essentially each R 20 and R 21 is independently selected from the group consisting of: methyl, ethyly and propyl radicals.
Claim 19
Dependent Claim
26 words
The compound of claim 9 which essentially each R 22 and R 23 is independently selected from the group consisting of: methyl, ethyl and propyl radicals.
Claim 20
Dependent Claim
27 words
The compound of claim 17 in which essentially each R 20 and R 21 is independently selected from the group consisting of: methyl, ethyl and propyl radicals.
Claim 21
Dependent Claim
250 words
A polydiorganosiloxane gel comprising a crosslinked polymer of the formula: ##STR10## in which: essentially each R 13 and R 14 is an alkyl radical having from 1 to about 6 carbon atoms; r is an integer between about 50 and about 400, each R 13 and R 14 being independently selected for each of the r groups; R 15 and R 15' are alkyl radicals having from 1 to about 6 carbon atoms; R 16 is an alkyl radical having from about 2 to about 6 carbon atoms; R 16' is an alkylene radical having from about 2 to about 6 carbon atoms; R 22 and R 23 are alkyl radicals having from 1 to about 6 carbon atoms; t is an integer between about 50 and about 300, each R 22 and R 23 being independently selected for each of the t groups; R 20 and R 21 are alkyl radicals having from 1 to about 6 carbon atoms; s and s' are integers from about 1 to about 20, each R 15 , R 16 , R 20 , R 21 , R 22 , R 23 and t being independently selected for each of the s groups, the r and s groups being randomly interspersed along the compound; and R 17 , R 18 and R 19 are selected from the group consisting of: an alkylene radical having from 2 to about 6 carbon atoms, and an alkyl radical having from 1 to about 6 carbon atoms.
Claim 22
Dependent Claim
250 words
A polydiorganosiloxane gel comprising a crosslinked polymer of the formula: ##STR10## in which: essentially each R 13 and R 14 is an alkyl radical having from 1 to about 6 carbon atoms; r is an integer between about 50 and about 400, each R 13 and R 14 being independently selected for each of the r groups; R 15 and R 15' are alkyl radicals having from 1 to about 6 carbon atoms; R 16 is an alkyl radical having from about 2 to about 6 carbon atoms; R 16' is an alkylene radical having from about 2 to about 6 carbon atoms; R 22 and R 23 are alkyl radicals having from 1 to about 6 carbon atoms; t is an integer between about 50 and about 300, each R 22 and R 23 being independently selected for each of the t groups; R 20 and R 21 are alkyl radicals having from 1 to about 6 carbon atoms; s and s' are integers from about 1 to about 20, each R 15 , R 16 , R 20 , R 21 , R 22 , R 23 and t being independently selected for each of the s groups, the r and s groups being randomly interspersed along the compound; and R 17 , R 18 and R 19 are selected from the group consisting of: an alkylene radical having from 2 to about 6 carbon atoms, and an alkyl radical having from 1 to about 6 carbon atoms.
Claim 23
Dependent Claim
44 words
The gel of claim 19 in which essentially each R 13 , R 14 , R 15 , R 20 , R 21 , R 22 and R 23 is independently selected from the group consisting of: methyl, ethyl, propyl, phenyl and 3,3,3-trifluoropropyl radicals.
Claim 24
Dependent Claim
33 words
The compound of claim 20 in which essentially each R 13 , R 14 , R 15 , R 20 , R 21 , R 22 and R 23 is a methyl radical.
Claim 25
Dependent Claim
15 words
The gel of claim 19 in which the polymer is cross-linked with the radical ##STR11##
Claim 26
Dependent Claim
22 words
The gel of claim 19 and which is substantially free of free siloxane polymers having a molecular weight of below about 10,000.
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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) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |