Patent US4299627A successfully refreshed from Google Patents.
Patent US3928256A successfully refreshed from Google Patents.
US3928256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of carbodiimide-isocyanurate foams
Assignee: BASF Corp
•
Filing: 1974-02-25
•
Granted: 1975-12-23
•
Expires: 1994-02-25
Abstract
Abstract Rigid cellular foam compositions characterized by carbodiimide and isocyanurate linkages are prepared by catalytically condensing an organic polyisocyanate in the presence of a catalytically sufficient amount of a co-catalyst system of certain tertiary amino alcohols and a tertiary amine trimerization catalyst.
Inventors
- 👤 Moses Cenker
- 👤 Thirumurti L Narayan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/02; C08G18/025; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1825; C08G2110/00; C08G2110/0025; C08G2110/0041; C08G2110/005; C08G2115/00; C08G2115/02; C08G2115/06; Y; Y10; Y10S; Y10S521/00; Y10S521/901; Y10S521/902
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
BY PROCESS FOR THE PREPARATION OF A CELLULAR FOAM CHARACTERIZED BY CARBODIIMIDE AND ISOCYANURATE LINKAGES WHICH COMPRISES CONDENSING AN ORGANIC POLYISOCYANATE IN THE PRESENCE OF A CATALYTICALLY SUFFICIENT AMOUNT OF A CATALYST SYSTEM CONSISTING ESSENTIALLY OF A TERTIARY AMINE TERIMERIZATION CATALYS SELECTED FROM THE GROUP CONSISTING OF 1,3,5-TRIS(N,N-DIALK YLAMINOALKYL)-S-HEXAHYDROTRIAZINES AND ALKYLENE OXIDE AND WATER ADDUCTS THEREOF AND A B-HYDROXYALKYL N-SUBSTITUTED TERTIARY AMINE HAVING A MOLECULAR WEIGHT OF FROM 89 TO 304 AND CONTAINING FROM 1 TO 3 TERTIARY AMINO GROUPS WHEREIN EACH NITROGEN ATOM IS SUBSTITUTED BY AT LEAST ONE B-HYDROXYALKYL GROUP WHEREIN THE ALKYL GROUP CONTAINS FROM 1 TO 4 CARBON ATOMS.
Claim 2
Dependent Claim
103 words
BY PROCESS FOR THE PREPARATION OF A CELLULAR FOAM CHARACTERIZED BY CARBODIIMIDE AND ISOCYANURATE LINKAGES WHICH COMPRISES CONDENSING AN ORGANIC POLYISOCYANATE IN THE PRESENCE OF A CATALYTICALLY SUFFICIENT AMOUNT OF A CATALYST SYSTEM CONSISTING ESSENTIALLY OF A TERTIARY AMINE TERIMERIZATION CATALYS SELECTED FROM THE GROUP CONSISTING OF 1,3,5-TRIS(N,N-DIALK YLAMINOALKYL)-S-HEXAHYDROTRIAZINES AND ALKYLENE OXIDE AND WATER ADDUCTS THEREOF AND A B-HYDROXYALKYL N-SUBSTITUTED TERTIARY AMINE HAVING A MOLECULAR WEIGHT OF FROM 89 TO 304 AND CONTAINING FROM 1 TO 3 TERTIARY AMINO GROUPS WHEREIN EACH NITROGEN ATOM IS SUBSTITUTED BY AT LEAST ONE B-HYDROXYALKYL GROUP WHEREIN THE ALKYL GROUP CONTAINS FROM 1 TO 4 CARBON ATOMS.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein the organic polyisocyanate is selected from the group consisting of toluene diisocyanate, methylene diphenyl diisocyanate, polyphenyl polymethylene polyisocyanate and mixtures thereof.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein the tertiary amine is 1,3,5-tris(N,N-dimethylamino)-s-hexahydrotriazine.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein the Beta -hydroxyalkyl N-substituted tertiary amine is an N,N-dialkylamino alkanol.
Claim 6
Dependent Claim
11 words
The process of claim 4 wherein the N,N-dialkylamino alkanol is N,N-dimethylaminoethanol.
Claim 7
Dependent Claim
38 words
The process of claim 1 carried out in the presence of from 0.01 to 0.5 equivalent of a polyol having an average functionality of 2 to 8 and an average hydroxyl equivalent of from about 100 to 3000.
Claim 8
Dependent Claim
17 words
The process of claim 6 carried out in the presence of a catalyst which promotes urethane linkages.
Claim 9
Dependent Claim
18 words
The process of claim 7 wherein the catalyst which promotes urethane linkages is dibutyltin diacetate or dibutyltin dilaurate.
Claim 10
Dependent Claim
15 words
The process of claim 1 carried out in the presence of a fluorocarbon blowing agent.
Claim 11
Dependent Claim
13 words
The process of claim 1 carried out in the presence of tris(2-chloroethyl) phosphate.
References Cited (Backward Citations)
US3001973A
Cited
US2954365A
Cited
US3341482A
Cited
US2993870A
Cited
US2995530A
Cited
US3294753A
Cited
US3448065A
Cited
US3438908A
Cited
US3793236A
Cited
US3717596A
Cited
US3799896A
Cited
US3806475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |