US4177332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,1,1-Trifluoro-2-chloroethane as blowing agent for polyurethane foam
Assignee: Bayer AG
•
Filing: 1978-08-08
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Granted: 1979-12-04
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Expires: 1998-08-08
Abstract
Abstract In the production of a foamed synthetic material by the reaction of starting materials which undergo a polymerization, polycondensation or polyaddition reaction to produce a high molecular weight synthetic material in the presence of a blowing agent, e.g. a polyurethane, or by foaming an unfoamed thermoplastic synthetic material by means of a blowing agent, the improvement which comprises employing 1,1,1-trifluoro-2-chloroethane as the blowing agent, optionally in admixture with 1,1-difluoro-2-chloroethane.
Inventors
- 👤 Karl-Heinz Mitschke
- 👤 Hans Niederprum
- 👤 Manfred Kapps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:10
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/143; C08J9/144
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
58 words
In the production of a foamed synthetic material by the reaction of starting materials which undergo a polymerization reaction to produce a high molecular weight synthetic material in the presence of a blowing agent or by foaming an unfoamed thermoplastic synthetic material by means of a blowing agent, the improvement which comprises employing 1,1,1-trifluoro-2-chloroethane as the blowing agent.
Claim 2
Dependent Claim
58 words
In the production of a foamed synthetic material by the reaction of starting materials which undergo a polymerization reaction to produce a high molecular weight synthetic material in the presence of a blowing agent or by foaming an unfoamed thermoplastic synthetic material by means of a blowing agent, the improvement which comprises employing 1,1,1-trifluoro-2-chloroethane as the blowing agent.
Claim 3
Dependent Claim
26 words
A process according to claim 1, wherein 1,1-difluoro-1,2-dichloroethane is mixed with the 1,1,1-trifluoro-2-chloroethane in up to about 80% by weight of the mixture of the two.
Claim 4
Dependent Claim
16 words
A process according to claim 1, wherein the starting materials react to form a polyurethane foam.
Claim 5
Dependent Claim
26 words
A process according to claim 3, wherein 1,1-difluoro-1,2-dichloroethane is mixed with the 1,1,1-trifluoro-2-chloroethane in about 20 to 80% by weight of the mixture of the two.
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) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |