US4081410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysiloxane surfactants useful for foaming polyurethane foams
Assignee: General Electric Co
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Filing: 1976-03-31
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Granted: 1978-03-28
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Expires: 1996-03-31
Abstract
Abstract A polysiloxane surfactant useful in controlling the foaming of a polyurethane foam having the formula, ##STR1## where y is a whole number varying from 15 to 150 and z is a whole number varying from 3 to 16 where R and R' are monovalent hydrocarbon radicals of less than 8 carbon atoms, R 2 is selected from alkylene and arylene radicals of from 11 to 20 carbon atoms, n is an integer that varies from 2 to 4, x varies from 5 to 30 for the case n is equal to 2, x varies from 1 to 40 for the case n is equal to 3 and 4 where there may be ether units with n equal to 2,3, and 4 in the same molecule.
Inventors
- 👤 Richard E. Moeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:10
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J2375/00; C08J2375/04; C08J2483/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
167 words
A polyurethane foam composition formed from a mixture of a polyether or polyester, a polyisocyanate, a blowing agent in minor amounts sufficient to foam the mixture, a catalyst for catalyzing the reaction between the polyether or polyester and polyisocyanate and a polysiloxane surfactant in sufficient amount to control the foam comprising a compound of the formula, ##STR10## where y is a whole number varying from 15 to 150 and z is a whole number varying from 3 to 16 where R and R' are monovalent hydrocarbon radicals of less than 8 carbon atoms, R 2 is selected from alkylene and arylene radicals of from 11 to 20 carbon atoms, n is an integer that varies from 2 to 4, x varies from 5 to 30 for the case n is equal to 2, x varies from 1 to 40 for the case n is equal to 3 and 4 where there may be ether units with n equal to 2, 3 and 4 in the same molecule.
Claim 2
Dependent Claim
167 words
A polyurethane foam composition formed from a mixture of a polyether or polyester, a polyisocyanate, a blowing agent in minor amounts sufficient to foam the mixture, a catalyst for catalyzing the reaction between the polyether or polyester and polyisocyanate and a polysiloxane surfactant in sufficient amount to control the foam comprising a compound of the formula, ##STR10## where y is a whole number varying from 15 to 150 and z is a whole number varying from 3 to 16 where R and R' are monovalent hydrocarbon radicals of less than 8 carbon atoms, R 2 is selected from alkylene and arylene radicals of from 11 to 20 carbon atoms, n is an integer that varies from 2 to 4, x varies from 5 to 30 for the case n is equal to 2, x varies from 1 to 40 for the case n is equal to 3 and 4 where there may be ether units with n equal to 2, 3 and 4 in the same molecule.
Claim 3
Dependent Claim
27 words
The composition of claim 1 wherein there is utilized 0.25 to 7.5% by weight of said polysiloxane surfactant based on the weight of said polyether or polyester.
Claim 4
Dependent Claim
13 words
The composition of claim 2 wherein the polysiloxane surfactant has the formula, ##STR11##
References Cited (Backward Citations)
US3654195A
Cited
US3723491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |