US3879433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxyalkylsiloxane rigid urethane foam stabilizers
Assignee: Union Carbide Corp
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Filing: 1972-12-29
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Granted: 1975-04-22
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Expires: 1992-12-29
Abstract
Abstract This application relates to certain novel hydroxyalkylsiloxanes that are particularly useful as foam stabilizers for rigid polyurethane foams. The novel hydroxyalkylsiloxanes have critical siloxane molecular weights and are produced by an addition reaction involving hydrosiloxanes and olefinically unsaturated alcohols that contain a terminal olefinic double bond which is incapable of shifting.
Inventors
- 👤 George M Omietanski
- 👤 Vincent T Chuang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:31
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C07F7/0872; C07F7/0876; C07F7/0878; C07F7/0879; C08G; C08G77/00; C08G77/04; C08G77/38; C08J2375/00; C08J2375/04; C08J2375/08; C08J2483/00; C10; C10M; C10M2229/00; C10M2229/04; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048; C10N; C10N2040/00; C10N2040/46
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
14 words
A HYDROXYALKYLSILOXANE CONSISTING ESSENTIALLY OF (A) AT LEAST ONE HYDROXYALKYLSILOXANE UNIT HAVING THE FORMULA:
Claim 2
Dependent Claim
14 words
A HYDROXYALKYLSILOXANE CONSISTING ESSENTIALLY OF (A) AT LEAST ONE HYDROXYALKYLSILOXANE UNIT HAVING THE FORMULA:
Claim 3
Dependent Claim
14 words
A hydroxyalkylsiloxane consisting essentially of (A) at least one hydroxyalkylsiloxane unit having the formula:
Claim 4
Dependent Claim
14 words
A hydroxyalkylsiloxane consisting essentially of (A) at least one hydroxyalkylsiloxane unit having the formula:
Claim 5
Dependent Claim
44 words
A hydroxyalkylsiloxane as claimed in claim 1 wherein each hydroxyalkylsiloxane group has no more than 10 carbon atoms, the siloxane portion represents from 50 to 80 weight percent of the hydroalkylsiloxane and the hydroalkylsiloxane has a viscosity from 17 to 5,000 centistokes at 25*C.
Claim 6
Dependent Claim
22 words
A hydroxyalkylsiloxane as claimed in claim 1 containing at least one hydroxyalkylsiloxane unit as defined in claim 1 wherein b+c is 1.
Claim 7
Dependent Claim
22 words
A hydroxyalkylsiloxane as claimed in claim 1 containing at least one hydroxyalkylsiloxane unit as defined in claim 1 wherein b+c is 2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |