Patent US4130698A successfully refreshed from Google Patents.
US4130698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foam containing internal mold-release agent
Assignee: Imperial Chemical Industries Ltd
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Filing: 1977-03-01
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Granted: 1978-12-19
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Expires: 1997-03-01
Abstract
Abstract A mold-release agent is provided which consists essentially of 99.9% to 80% by weight of an aromatic polyisocyanate containing at least two isocyanate groups and 0.1% to 20% by weight of a fatty acid ester, e.g., glycerol trioleate, olive oil, peanut oil, etc. A process of using the material by incorporating it in polyurethane foams is disclosed.
Inventors
- 👤 David J. Sparrow
- 👤 Willy Van Autgaerden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:14
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0023; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
99 words
A process for the production of polyurethane foam mouldings which comprises foaming a reaction mixture which comprises (A) an aromatic polyisocyanate containing at least two isocyanate groups, (B) at least one compound containing at least two isocyanate reactive groups, (C) a foaming agent, (D) a foam stabiliser and (E) 2% to 8% by weight based on the weight of (B) of at least one processing aid which is an ester of fatty acid containing 6 to 25 carbon atoms and an aliphatic saturated alcohol containing 2 to 4 hydroxyl groups, said reaction being carried out in a closed mould.
Claim 2
Dependent Claim
99 words
A process for the production of polyurethane foam mouldings which comprises foaming a reaction mixture which comprises (A) an aromatic polyisocyanate containing at least two isocyanate groups, (B) at least one compound containing at least two isocyanate reactive groups, (C) a foaming agent, (D) a foam stabiliser and (E) 2% to 8% by weight based on the weight of (B) of at least one processing aid which is an ester of fatty acid containing 6 to 25 carbon atoms and an aliphatic saturated alcohol containing 2 to 4 hydroxyl groups, said reaction being carried out in a closed mould.
Claim 3
Dependent Claim
20 words
A process according to claim 1 in which the weight of processing aid is between 3% and 5% by weight.
Claim 4
Dependent Claim
14 words
A process according to claim 1 in which the processing aid is glycerol trioleate.
Claim 5
Dependent Claim
24 words
A process according to claim 1 in which the processing aid is selected from olive oil, rape seed oil, coconut oil, and peanut oil.
Claim 6
Dependent Claim
20 words
A process according to claim 1 in which the foaming agent (C) is water and/or a low boiling halolower alkane.
Claim 7
Dependent Claim
15 words
A process according to claim 5 in which the foaming agent comprises water and trichlorofluoromethane.
Claim 8
Dependent Claim
13 words
A moulded article whenever produced by a process as claimed in claim 1.
Claim 9
Dependent Claim
13 words
A process as in claim 1 wherein the ester is a synthetic ester.
Claim 10
Dependent Claim
33 words
A mixture consisting essentially of 99.9% to 80% by weight of an aromatic polyisocyanate containing at least two isocyanate groups and 0.1% to 20% by weight of glycerol trioleate as a processing aid.
Claim 11
Dependent Claim
33 words
A mixture consisting essentially of 99.9% to 80% by weight of an aromatic polyisocyanate containing at least two isocyanate groups and 0.1% to 20% by weight of glycerol trioleate as a processing aid.
Claim 12
Dependent Claim
20 words
A mixture according to claim 9 in which the mixture comprises between 2% and 8% by weight of glycerol trioleate.
Claim 13
Dependent Claim
20 words
A mixture according to claim 10 in which the mixture comprises between 3% and 5% by weight of glycerol trioleate.
Claim 14
Dependent Claim
15 words
A mixture as in claim 9 in which the glycerol trioleate is synthetic glycerol trioleate.
References Cited (Backward Citations)
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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) | 1981-12-18 | 1982-06-19 | 1982-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-18 | 1986-06-19 | 1986-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-18 | 1990-06-19 | 1990-12-19 | $7700.00 | Window Closed / Lapsed |