US5169873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of foams with the aid of blowing agents containing fluoroalkanes and fluorinated ethers, and foams obtained by this process
Assignee: Solvay SA
•
Filing: 1991-03-04
•
Granted: 1992-12-08
•
Expires: 2011-03-04
Abstract
Abstract Process for the manufacture of foams with the aid of blowing agents containing fluoroalkanes and fluorinated ethers, and foams obtained by this process. The invention relates to a process for the manufacture of foams based on polyisocyanates by the reaction of polyisocyanates, compounds containing at least two hydrogen atoms reactive towards isocyanate groups, blowing agents and, if appropriate, other additives. The blowing agents used consist to the extent of at least 10 mol % of at least one fluoroalkane of formula (I), CaHbFc, where a=2-6, b=1-12, and c=2-13, and at least one fluorinated ether of formula (II), CaHbFcO-CdHeFf, where a=1-6, b=1-12, c=1-12, d=1-2, e=0-5 and f=0-5. The invention further relates to the foams obtained by this process.
Inventors
- 👤 Klaus-Jurgen Behme
- 👤 Hans-Matthias Deger
- 👤 Claudia Schutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:28
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/143; C08J2203/00; C08J2203/14; C08J2203/146; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
72 words
A process for the manufacture of foams based on polyisocyanates by the reaction of the components comprising polyisocyanates, compounds containing at least two hydrogen atoms reactive towards isocyanate groups, and blowing agents and, wherein the blowing agents used comprise to the extent of at least 10 mol % of at least one fluoroalkane of formula (I), C a H b F c , where a=2-6, b=1-12 and c=2-12, d=1-2, e=0-5 and f=0-5.
Claim 2
Dependent Claim
72 words
A process for the manufacture of foams based on polyisocyanates by the reaction of the components comprising polyisocyanates, compounds containing at least two hydrogen atoms reactive towards isocyanate groups, and blowing agents and, wherein the blowing agents used comprise to the extent of at least 10 mol % of at least one fluoroalkane of formula (I), C a H b F c , where a=2-6, b=1-12 and c=2-12, d=1-2, e=0-5 and f=0-5.
Claim 3
Dependent Claim
35 words
A process as claimed in claim 1, wherein part of the remainder of the blowing agent is a physical blowing agent other than a fluoroalkane of formula (I) of a fluorinated ether of formula (II).
Claim 4
Dependent Claim
35 words
A process as claimed in claim 1, wherein at least part of the remainder of the blowing agent includes CO 2 which is formed by the addition of water during the reaction of the polyisocyanates.
Claim 5
Dependent Claim
35 words
A process as claimed in claim 3, wherein part of the remainder of the blowing agent includes a physical blowing agent other than a fluoroalkane of formula (I) or a fluorinated ether of formula (II).
Claim 6
Dependent Claim
33 words
A process as claimed in claim 1, wherein the remainder of the blowing agent consists essentially of CO 2 which is formed by the addition of water during the reaction of the polyisocyanates.
Claim 7
Dependent Claim
39 words
A process as claimed in claim 1, wherein the blowing agent used comprises to the extent of at least 20 mol % of at least one fluoroalkane of formula (I) and at least one fluorinated ether of formula (II).
Claim 8
Dependent Claim
37 words
A process as claimed in claim 1, wherein the blowing agent used comprises to the extent of 40-60 mol % of at least one fluoroalkane of formula (I) and at least one fluorinated ether of formula (II).
Claim 9
Dependent Claim
23 words
A process as claimed in claim 1, wherein one or more fluoroalkanes of formula (I) in which a=2-5, b=1-9 and c=3-11 are used.
Claim 10
Dependent Claim
23 words
A process as claimed in claim 1, wherein one or more fluoroalkanes of formula (I) in which a=2-4, b=1-6 and c=4-9 are used.
Claim 11
Dependent Claim
40 words
A process as claimed in claim 1, wherein one or more fluorinated ethers of formula (II) in which ______________________________________
a = 1-5 d = 1-2
b = 1-6 e = 0-3
c = 5-10 f = 2-5
______________________________________ are used.
Claim 12
Dependent Claim
40 words
A process as claimed in claim 1, wherein one or more fluorinated ethers of formula (II) in which ______________________________________
a = 1-3 d = 1-2
b = 1-4 e = 0-3
c = 1-6 f = 2-5
______________________________________ are used.
Claim 13
Dependent Claim
28 words
A process as claimed in claim 1, wherein the molar ratio of the fluoroalkanes of formula (I) to the fluorinated ethers of formula (II) is 1:10 to 10:1.
Claim 14
Dependent Claim
17 words
A process as claimed in claim 1, wherein said components include a catalyst or a surface-active additive.
Claim 15
Dependent Claim
11 words
A foam obtained by the process as claimed in claim 1.
References Cited (Backward Citations)
GB1193122A
Cited
GB1209243A
Cited
JPH01135820A
Cited
EP0344537A1
Cited
US4931482A
Cited
US4972002A
Cited
JPH03744A
Cited
EP0416777A2
Cited
US5096933B1
Cited
US5096933A
Cited
US4997706A
Cited
US5026497A
Cited
US5026499A
Cited
US5035830A
Cited
US5023010A
Cited
US5098595A
Cited
US5037573A
Cited
US5037572A
Cited
US5039445A
Cited
US5100572A
Cited
US5023009A
Cited
US5064560A
Cited
US5064559A
Cited
US5093377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-08 | 1996-06-08 | 1996-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-08 | 2000-06-08 | 2000-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-08 | 2004-06-08 | 2004-12-08 | $7700.00 | Window Closed / Lapsed |