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US4025469A
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Novel catalyst system for trimerization organic isocyanates
Assignee: Armstrong World Industries Inc
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Filing: 1976-03-26
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Granted: 1977-05-24
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Expires: 1996-03-26
Abstract
Abstract A novel catalyst system is described that is useful in the trimerization of organic isocyanates. The system comprises (1) N,N',N"-trisdialkylaminoalkyl-s-hexahydrotriazine and (2) a compound selected from the group consisting of 3,5-bis(N,N-dialkylaminoalkyl)-1,3,5-tetrahydrooxadiazine, 5-(N,N-dialkylaminoalkyl)-1,3,5-dihydrodioxazine and the mixtures thereof.
Inventors
- 👤 William J. Kauffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:19
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; C08G18/2009; C08G18/02; C08G18/022; C08G18/10; C08G2115/00; C08G2115/02; Y; Y10; Y10S; Y10S521/00; Y10S521/902
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
57 words
In a method for the trimerization of organic isocyanates by the reaction of the isocyanate group, the improvement which comprises the step of carrying out said trimerization in the presence of a catalytically sufficient amount of a catalyst system comprising (1) N,N',N"-trisdialkylaminoalkyl-s-hexahydrotriazine and (2) a compound selected from the group consisting of 3,5-bis(N,N-dialkylaminoalkyl)-1,3,5-tetrahydrooxadiazine, 5-(N,N-dialkylaminoalkyl)-1,3,5-dihydrodioxazine and mixtures thereof.
Claim 2
Dependent Claim
57 words
In a method for the trimerization of organic isocyanates by the reaction of the isocyanate group, the improvement which comprises the step of carrying out said trimerization in the presence of a catalytically sufficient amount of a catalyst system comprising (1) N,N',N"-trisdialkylaminoalkyl-s-hexahydrotriazine and (2) a compound selected from the group consisting of 3,5-bis(N,N-dialkylaminoalkyl)-1,3,5-tetrahydrooxadiazine, 5-(N,N-dialkylaminoalkyl)-1,3,5-dihydrodioxazine and mixtures thereof.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said catalyst system comprises, N,N',N"-trisdialkylaminoalkyl-s-hexahydrotriazine and 3,5-bis(N,N-dialkylaminoalkyl)-1,3,5-tetrahydrooxadiazine.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein said catalyst system comprises N,N',N"-tris(dimethylaminopropyl)hexahydro-s-triazine and 3,5-bis(N,N-dimethylaminopropyl)-1,3,5-tetrahydrooxadiazine.
Claim 5
Dependent Claim
18 words
The method of claim 2 wherein said hexahydrotriazine:said tetrahydrooxadiazine are in the ratio of from 3:2 to 2:3.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein said catalyst system comprises N,N',N"-trisdialkylaminoalkyl-s-hexahydrotriazine and 5-(N,N-dialkylaminoalkyl)-1,3,5-dihydrodioxazine.
Claim 7
Dependent Claim
18 words
The method of claim 5 wherein said hexahydrotriazine and dihydrodioxazine are in the ratio of 1:10 to 10:1.
Claim 8
Dependent Claim
18 words
The method of claim 1 wherein said hexahydrotriazine:said tetrahydrooxadiazine:said dihydrodioxazine are in the ratio of 1:10:0 to 10:1:10.
Claim 9
Dependent Claim
60 words
In a process for the manufacture of a cellular foam characterized by isocyanurate linkages of the type wherein an organic polyisocyanate is catalytically condensed in the presence of a trimerization catalyst, the improvement comprising employing as the trimer catalyst a catalyst system comprising (1) N,N',N"-trisdialkylaminoalkyl-s-hexahydrotriazine and (2) a compound selected from the group consisting of 3,5-bis(N,N-dialkylaminoalkyl)-1,3,5-tetrahydrooxadiazine, 5-(N,N-dialkylaminoalkyl)-1,3,5-dihydrodioxazine and mixtures thereof.
Claim 10
Dependent Claim
60 words
In a process for the manufacture of a cellular foam characterized by isocyanurate linkages of the type wherein an organic polyisocyanate is catalytically condensed in the presence of a trimerization catalyst, the improvement comprising employing as the trimer catalyst a catalyst system comprising (1) N,N',N"-trisdialkylaminoalkyl-s-hexahydrotriazine and (2) a compound selected from the group consisting of 3,5-bis(N,N-dialkylaminoalkyl)-1,3,5-tetrahydrooxadiazine, 5-(N,N-dialkylaminoalkyl)-1,3,5-dihydrodioxazine and mixtures thereof.
Claim 11
Dependent Claim
13 words
The process of claim 8 wherein said catalyst system comprises N,N',N"-trisdialkylaminoalkyl-s-hexahydrotriazine and 3,5-bis(N,N-dialkylaminoalkyl)-1,3,5-tetrahydrooxadiazone.
Claim 12
Dependent Claim
13 words
The process of claim 8 wherein said catalyst system comprises N,N',N"-tris(dimethylaminopropyl)hexahydro-s-triazine and 3,5-bis(N,N-dimethylaminopropyl)-1,3,5-tetrahydrooxadiazine.
Claim 13
Dependent Claim
14 words
The process of claim 8 wherein said hexahydrotriazine:said tetrahydrooxadiazine are from 3:2 to 2:3.
Claim 14
Dependent Claim
13 words
The process of claim 8 wherein said catalyst system comprises N,N',N"-trisdialkylaminoalkyl-s-hexahydrotriazine and 5-(N,N-dialkylaminoalkyl)-1,3,5-dihydrodioxazine.
Claim 15
Dependent Claim
17 words
The process of claim 8 wherein said hexahydrotriazine:said dihydrodioxazine are in the ratio of 1:10 to 10:1.
Claim 16
Dependent Claim
18 words
The process of claim 8 wherein said hexahydrotriazine:said tetrahydrooxadiazine:said dihydrodioxazine are in the ratio of 1:10:0 to 10:1:10.
Claim 17
Dependent Claim
24 words
The process of claim 8 wherein the organic polyisocyanate is selected from the group consisting of toluene diisocyanate, methylene diphenyl diisocyanate and mixtures thereof.
References Cited (Backward Citations)
US2993870A
Cited
US3446779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |