US5137932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing foams
Assignee: Solvay SA
•
Filing: 1990-12-05
•
Granted: 1992-08-11
•
Expires: 2010-12-05
Abstract
Abstract The invention relates to a process for producing foams based on polyisocyanates by reacting polyisocyanates, compounds having at least two hydrogen atoms reactive towards isocyanate groups, blowing agents and, if appropriate, further additives. In this process, a blowing agent is used which is composed to the extent of at least 10 mol % of one or more fluorinated ethers of the formula CaHbFc-O-CdHeFf where -a = 1-6 d = 1-2 -b = 1-12 e = 0-5 -c = 1-12 f = 0-5. -
Inventors
- 👤 Klaus-Jurgen Behme
- 👤 Hans-Matthias Deger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:38
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; Y; Y10; Y10S; Y10S521/00; Y10S521/91
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
A process for producing foams based on polyisocyanates by reacting polyisocyanates, compounds having at least two hydrogen atoms reactive towards isocyanate groups, blowing agents and optionally, further additives, which comprises using a blowing agent which is composed to the extent of at least 10 mol % of one or more fluorinated ethers of the formula I C.sub.a H.sub.b F.sub.c --O--C.sub.d H.sub.e F.sub.f where ______________________________________
a = 1-6 d = 1-2
b = 1-12 e = 0-5
c = 1-12 f = 0-5.
______________________________________
Claim 2
Dependent Claim
83 words
A process for producing foams based on polyisocyanates by reacting polyisocyanates, compounds having at least two hydrogen atoms reactive towards isocyanate groups, blowing agents and optionally, further additives, which comprises using a blowing agent which is composed to the extent of at least 10 mol % of one or more fluorinated ethers of the formula I C.sub.a H.sub.b F.sub.c --O--C.sub.d H.sub.e F.sub.f where ______________________________________
a = 1-6 d = 1-2
b = 1-12 e = 0-5
c = 1-12 f = 0-5.
______________________________________
Claim 3
Dependent Claim
34 words
The process as claimed in claim 1, wherein a blowing agent is used which is comprised to the extent of at least 20 mol % of one or more of the said fluorinated ethers.
Claim 4
Dependent Claim
32 words
The process as claimed in claim 1, wherein a blowing agent is used which is comprised to the extent of 50-80 mol % of one or more of the said fluorinated ethers.
Claim 5
Dependent Claim
35 words
The process as claimed in claim 1, wherein the remainder of the blowing agent is comprised at least partially of CO 2 which is formed by addition of water during the reaction of the polyisocyanates.
Claim 6
Dependent Claim
33 words
The process as claimed in claim 1, wherein the remainder of the blowing agent is consisting essentially of CO 2 which is formed by addition of water during the reaction of the polyisocyanates.
Claim 7
Dependent Claim
38 words
The process as claimed in claim 1, wherein one or more fluorinated ethers of the formula I where ______________________________________
a = 1-5 d = 1-2
b = 1-6 e = 1-3
c = 5-10 f = 2-4
______________________________________
Claim 8
Dependent Claim
40 words
The process as claimed in claim 1, wherein one or more fluorinated ethers of the formula I where ______________________________________
a = 1-3 d = 1-2
b = 1-4 e = 1-3
c = 1-6 f = 2-4
______________________________________ are used.
Claim 9
Dependent Claim
13 words
The process as claimed in claim 1, wherein the blowing agent is non-flammable.
Claim 10
Dependent Claim
87 words
A process for producing a polyisocyanate-derived foam by reacting the components comprising a polyisocyanate and a compound having at least two hydrogen atoms reactive toward isocyanate groups, the reaction between said components being accompanied by a blowing step with the aid of a blowing agent comprising at least 10 mol % of one or more fluorinated ethers of formula I C.sub.a H.sub.b F.sub.c --O--C.sub.d H.sub.e F.sub.f where ______________________________________
a = 1-6 d = 1-2
b = 1-12 e = 0-5
c = 1-12 f = 0-5.
______________________________________
Claim 11
Dependent Claim
87 words
A process for producing a polyisocyanate-derived foam by reacting the components comprising a polyisocyanate and a compound having at least two hydrogen atoms reactive toward isocyanate groups, the reaction between said components being accompanied by a blowing step with the aid of a blowing agent comprising at least 10 mol % of one or more fluorinated ethers of formula I C.sub.a H.sub.b F.sub.c --O--C.sub.d H.sub.e F.sub.f where ______________________________________
a = 1-6 d = 1-2
b = 1-12 e = 0-5
c = 1-12 f = 0-5.
______________________________________
References Cited (Backward Citations)
DE1111381B
Cited
GB1193122A
Cited
GB1209243A
Cited
US4041148A
Cited
US4139607A
Cited
EP0077964A1
Cited
EP0334059A1
Cited
EP0416777A2
Cited
US4999127A
Cited
US5023010A
Cited
US5023009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-11 | 1996-02-10 | 1996-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-11 | 2000-02-10 | 2000-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-11 | 2004-02-10 | 2004-08-11 | $7700.00 | Window Closed / Lapsed |