US4855379A
Expired / Lapsed
US
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Silicone surfactants containing cyclic siloxane pendants
Assignee: General Electric Co
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Filing: 1988-03-08
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Granted: 1989-08-08
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Expires: 2008-03-08
Abstract
Abstract Novel siloxane-polyether polymers are provided containing cyclic siloxanes which are useful in silicone surfactants for foam polyurethane foam applications. The novel polymers are prepared by reacting a polyhydridosiloxane polymer with a cyclic polysiloxane containing a vinyl group and with an allyl started polyoxyalkylene polymer in the presence of a platinum catalyst. The resulting polymeric products are highly potent and impart flat breathability profiles to foams when used as surfactants in their preparation.
Inventors
- 👤 Richard A. Budnik
- 👤 Gerald J. Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:52
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G77/00; C08G77/42; C08G77/46; C08G77/48; C08G77/50; C09; C09K; C09K23/00; C09K23/54; C08J2375/00; C08J2375/04; C08J2483/00; C08J2483/10; C08J2483/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
42 words
A siloxane-polyether surfactant comprising a siloxane backbone to which is attached both polyether groups and cyclic siloxane groups said cyclic siloxane groups being free of reactive groups and which are attached to the siloxane backbone through Si--CH 2 --CH 2 --Si linkages.
Claim 2
Dependent Claim
42 words
A siloxane-polyether surfactant comprising a siloxane backbone to which is attached both polyether groups and cyclic siloxane groups said cyclic siloxane groups being free of reactive groups and which are attached to the siloxane backbone through Si--CH 2 --CH 2 --Si linkages.
Claim 3
Dependent Claim
15 words
The silicone surfactant of claim 1 wherein said cyclic siloxane group is derived from vinylheptamethylcyclotetrasiloxane.
Claim 4
Dependent Claim
15 words
The silicone surfactant of claim 1 wherein said cyclic siloxane group is derived from vinylnonamethylcyclopentasiloxane.
Claim 5
Dependent Claim
80 words
The silicone surfactants of claim 1 having the formula: MD.sub.a D°.sub.b D".sub.c M wherein: M represents Me 3 SiO 1/2 , D represents Me 2 SiO, D° represents MeSi(O)CH 2 CH 2 Si(Me)O--(Me 2 SiO) x , where x=2 to 4, D" represents MeSi(O)CH 2 CH 2 CH 2 --O-Polyether, in which a has a value of form 0 to 200, b has a value of from 1 to 200 and c has a value of from 1 to 200.
Claim 6
Dependent Claim
10 words
The silicone surfactant of claim 4 wherein a equals 0.
Claim 7
Dependent Claim
11 words
The silicone surfactant of claim 4 wherein a=15, b=11.4 and c=5.5.
Claim 8
Dependent Claim
11 words
The silicone surfactant of claim 4 wherein a=30, b=8.4 and c=5.5.
Claim 9
Dependent Claim
11 words
The silicone surfactant of claim 4 wherein a=0, b=14.4 and c=5.5.
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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) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |