US3896052A
Expired / Lapsed
US
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Cocatalyst system for trimerizing polyisocyanates
Assignee: Pharmacia and Upjohn Co
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Filing: 1974-01-30
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Granted: 1975-07-22
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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) an alkali metal salt of an Nsubstituted amide, (ii) an alkali metal salt of an N-(2hydroxyphenyl)methyl glycine, and optionally a tertiary amine trimerization catalyst. The use of these catalyst combinations in the preparation of polyisocyanurate foams results in the facile continuous formation of laminate board stock. The polyisocyanurate foams produced using the novel catalyst combinations of the invention are characterized by having high resistance to heat distortion and volume change.
Inventors
- 👤 Robert J Lockwood
- 👤 Jr Harold E Reymore
- 👤 Edward J Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:25
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; B32B5/20; B32B5/22; C; C08; C08G; C08G12/00; C08G12/02; C08G18/00; C08G18/02; C08G18/022; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2307/00; B32B2307/30; B32B2307/304; B32B2307/306; B32B2307/3065; B32B2419/00; B32B2419/06; B32B2607/00; Y; Y10; Y10S; Y10S521/00; Y10S521/902
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
28 words
A COCATALYST SYSTEM FOR THE TRIMERIZATION OF A POLYISCYANATE CONSISTING ESSENTIALLY OF: A. FROM ABOUT 33 TO ABOUT 67 MOLE PERCENT OF AN AMIDE SALT HAVING THE FORMULA
Claim 2
Dependent Claim
28 words
A COCATALYST SYSTEM FOR THE TRIMERIZATION OF A POLYISCYANATE CONSISTING ESSENTIALLY OF: A. FROM ABOUT 33 TO ABOUT 67 MOLE PERCENT OF AN AMIDE SALT HAVING THE FORMULA
Claim 3
Dependent Claim
13 words
A cocatalyst according to claim 1 wherein the amide salt is potassium N-phenyl-2-ethyl-hexamide.
Claim 4
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 5
Dependent Claim
53 words
A catalyst according to claim 1 which additionally contains from about 3 to about 40 weight percent of the combination of (a) and (b) of a tertiary amine trimerization catalyst selected from the group consisting of N,N-dIalkylpiperazines, trialkylamines, 1,4-diazabicyclo octane, N,N'',N'''' -trialkylaminoalkylhexahydrotriazines, mono-,di-, and tri-(dialkylaminoalkyl)monohydricphenols or thiophenols, N,N,N'',N'',-tetraalkylalkylenediamines, N,N-dialkylcyclohexylamines, N-alkylmorpholines, N,N-dialkylalkanolamines, and N,N,N'',N''-tetraalkylguanidines.
Claim 6
Dependent Claim
30 words
A cocatalyst according to claim 1 wherein the amide 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
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 8
Dependent Claim
37 words
A cocatalyst system for the trimerization of a polyisocyanate consisting essentially of: a. from about 33 to about 67 mole percent of potassium N-phenyl-2-ethyl-hexamide; and b. from about 33 to about 67 mole percent of sodium N-(2-hydroxy-5-nonylphenyl)methyl-N-methylglycinate.
Claim 9
Dependent Claim
37 words
A cocatalyst system for the trimerization of a polyisocyanate consisting essentially of: a. from about 33 to about 67 mole percent of potassium N-phenyl-2-ethyl-hexamide; and b. from about 33 to about 67 mole percent of sodium N-(2-hydroxy-5-nonylphenyl)methyl-N-methylglycinate.
Claim 10
Dependent Claim
28 words
A cocatalyst according to claim 7 wherein there is also present from about 3 to about 40 weight percent of the combination of (a) and (b) of N-ethylmorpholine.
Claim 11
Dependent Claim
28 words
A cocatalyst according to claim 7 wherein there is also present from about 3 to about 40 weight percent of the combination of (a) and (b) of N,N-dimethylcyclohexylamine.
Claim 12
Dependent Claim
29 words
A cocatalyst according to claim 7 wherein said amide is present in the form of a solution containing from about 25 percent to about 75 percent in a diluent.
Claim 13
Dependent Claim
17 words
A cocatalyst according to claim 10 wherein said diluent is a mixture of ethylene glycol and dimethylformamide.
Claim 14
Dependent Claim
29 words
A cocatalyst according to claim 7 wherein said glycinate is present in the form of a solution containing from about 25 percent to about 75 percent in a diluent.
Claim 15
Dependent Claim
12 words
A cocatalyst according to claim 12 wherein said diluent is diethylene glycol.
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) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |