Patent US3903018A successfully refreshed from Google Patents.
US3903018A
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Novel cocatalyst system for trimerizing polyisocyanates
Assignee: Pharmacia and Upjohn Co
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Filing: 1974-01-30
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Granted: 1975-09-02
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Expires: 1994-01-30
Abstract
Abstract A novel catalyst combination for the trimerization of polyisocyanates to polyisocyanurates is disclosed. The catalyst combination comprises (i) a tertiary amine trimerization catalyst containing a dimethylamino moiety, (ii) an alkali metal salt of an N-(2-hydroxyphenyl)methyl glycine, and (iii) a monomeric epoxide. The use of these catalysts in the preparation of polyisocyanurate foams results in facile machine preparation of bun stock foam without incurring the processing problems that arise from the prior art method. The polyisocyanurate foams produced using the novel catalyst combination of the invention are characterized by a reduced level of smoke generated on combustion.
Inventors
- 👤 Richard A Kolakowski
- 👤 Jr Harold E Reymore
- 👤 Adnan A R Sayigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:19
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/09; C08G18/092; C08G18/16; C08G18/161; Y; Y10; Y10S; Y10S521/00; Y10S521/902
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
52 words
IN A COCATALYST SYSTEM FOR THE TRIMERIZATION OF A POLYISOCYANATE WHICH CONSISTS ESSENTIALLY OF A MIXTURE OF A MONOMERIC EPOXIDE AND A TERTIARY AMINE TRIMERIZATION CATALYST CONTAINING A DIMETHYLAMINO GROUP, THE IMPROVEMENT WHEREIN SAID MIXTURE CONTAINS (A) FROM ABOUT 5 TO ABOUT 80 MOLE PERCENT OF A GLYCINE SALT HAVING THE FORMULA:
Claim 2
Dependent Claim
52 words
IN A COCATALYST SYSTEM FOR THE TRIMERIZATION OF A POLYISOCYANATE WHICH CONSISTS ESSENTIALLY OF A MIXTURE OF A MONOMERIC EPOXIDE AND A TERTIARY AMINE TRIMERIZATION CATALYST CONTAINING A DIMETHYLAMINO GROUP, THE IMPROVEMENT WHEREIN SAID MIXTURE CONTAINS (A) FROM ABOUT 5 TO ABOUT 80 MOLE PERCENT OF A GLYCINE SALT HAVING THE FORMULA:
Claim 3
Dependent Claim
25 words
A cocatalyst according to claim 1 wherein the epoxide ingredient is a glycidyl ether of a novolac resin having a functionality of at least two.
Claim 4
Dependent Claim
12 words
A cocatalyst according to claim 1 wherein the tertiary amine is N,N-dimethylcyclohexylamine.
Claim 5
Dependent Claim
14 words
A cocatalyst according to claim 1 wherein the glycine salt is sodium N-(2-hydroxy-5-nonylphenyl)methyl-N-methyl glycinate.
Claim 6
Dependent Claim
30 words
A cocatalyst according to claim 1 wherein the glycine salt is present in the form of a solution containing from about 25 percent to about 75 percent in a diluent.
Claim 7
Dependent Claim
61 words
A cocatalyst system for the trimerization of a polyisocyanate consisting essentially of: a. from about 10 to about 90 mole percent of a glycidyl ether of a novolac resin having a functionality of at least two; b. from about 5 to about 75 mole percent of N,N-dimethylcyclohexylamine; and c. from about 5 to about 80 mole percent of sodium N-(2-hydroxy-5-nonylphenyl)methyl-N-methyl glycinate.
Claim 8
Dependent Claim
61 words
A cocatalyst system for the trimerization of a polyisocyanate consisting essentially of: a. from about 10 to about 90 mole percent of a glycidyl ether of a novolac resin having a functionality of at least two; b. from about 5 to about 75 mole percent of N,N-dimethylcyclohexylamine; and c. from about 5 to about 80 mole percent of sodium N-(2-hydroxy-5-nonylphenyl)methyl-N-methyl glycinate.
Claim 9
Dependent Claim
29 words
A cocatalyst according to claim 6 wherein said glycinate is present in the form of a solution containing from about 25 percent to about 75 percent in a diluent.
Claim 10
Dependent Claim
12 words
A cocatalyst according to claim 7 wherein said diluent is diethylene glycol.
Claim 11
Dependent Claim
64 words
A cocatalyst system for the trimerization of a polyisocyanate according to claim 6 consisting essentially of: a. from about 35 to about 85 mole percent of a glycidyl ether of a novolac resin having a functionality of about two; b. from about 5 to about 35 mole percent of N,N-dimethylcyclohexylamine; and c. from about 10 to about 45 mole percent of sodium N-(2-hydroxy-5-nonylphenyl)methyl-N-methyl glycinate.
Claim 12
Dependent Claim
29 words
A cocatalyst according to claim 9 wherein said glycinate is present in the form of a solution containing from about 25 percent to about 75 percent in a diluent.
Claim 13
Dependent Claim
12 words
A cocatalyst according to claim 10 wherein said diluent is diethylene glycol.
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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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |