US4026837A
Expired / Lapsed
US
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Polymeric acid salts as isocyanurate foam catalysts
Assignee: Texaco Development Corp
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Filing: 1975-09-19
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Granted: 1977-05-31
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Expires: 1995-09-19
Abstract
Abstract New catalysts for isocyanurate foams comprising the potassium salt of a carboxy-terminated butadiene-acrylonitrile copolymer. The novel foams are obtained by the polymerization of an aromatic polyisocyanate, and a polyether or polyester polyol in the presence of a blowing agent and said copolymer useful as an isocyanurate group formation catalyst. The novel foams are useful in preparing rigid, flexible, semirigid or semi-flexible materials such as panels, slabs or sprayed foam surfaces.
Inventors
- 👤 Robert LeRoy Zimmerman
- 👤 Thomas Howard Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:46
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/225; C08G2115/00; C08G2115/02; Y; Y10; Y10S; Y10S521/00; Y10S521/902
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
In a process for preparing a cellular polymer containing recurring isocyanurate and urethane linkages which polymer comprises the reaction product obtained by the bringing together in the presence of a blowing agent a polyether or polyester polyol, an aromatic polyisocyanate, and an isocyanurate group formation catalyst; the improvement which comprises utilizing in at least a catalytically effective amount as said isocyanurate catalyst the potassium salt of a carboxyl-terminated butadiene-acrylonitrile copolymer, said copolymer represented by the following structural formula: ##STR2## where x may range from 1 to 10, y is 1, and m may range from about 7 to 13, said copolymer having an average molecular weight range of 2500-4500.
Claim 2
Dependent Claim
109 words
In a process for preparing a cellular polymer containing recurring isocyanurate and urethane linkages which polymer comprises the reaction product obtained by the bringing together in the presence of a blowing agent a polyether or polyester polyol, an aromatic polyisocyanate, and an isocyanurate group formation catalyst; the improvement which comprises utilizing in at least a catalytically effective amount as said isocyanurate catalyst the potassium salt of a carboxyl-terminated butadiene-acrylonitrile copolymer, said copolymer represented by the following structural formula: ##STR2## where x may range from 1 to 10, y is 1, and m may range from about 7 to 13, said copolymer having an average molecular weight range of 2500-4500.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein said copolymer is prepared by reacting 1-10 moles of butadiene per mole of acrylonitrile.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said molecular weight range is 3000-3500.
Claim 5
Dependent Claim
20 words
The process of claim 2 wherein said copolymer is prepared by reacting 3-7 moles of butadiene per mole of acrylonitrile.
Claim 6
Dependent Claim
14 words
The process of claim 1 wherein said copolymer has a carboxyl functionality of 1.6-2.6.
Claim 7
Dependent Claim
11 words
The process of claim 5 wherein said carboxyl functionality is 1.8-2.4.
Claim 8
Dependent Claim
14 words
The process of claim 2 wherein said polyisocyanate is a methylenebridged polyphenyl polyisocyanate mixture.
Claim 9
Dependent Claim
29 words
The process of claim 1 wherein said catalyst is utilized in an amount ranging from about 1 to about 10 percent based on the weight of said cellular polymer.
Claim 10
Dependent Claim
18 words
The process of claim 8 wherein said catalyst is utilized in an amount of 28 percent by weight.
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) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |