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US3931059A
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Process for preparing polycarbodiimide foams in the presence of phosphetane oxide or sulfide adducts
Assignee: Bayer AG
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Filing: 1974-08-19
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Granted: 1976-01-06
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Expires: 1994-08-19
Abstract
Abstract A compound adapted to be used to advantage as a catalyst for making carbodiimide foams is prepared by a process wherein A. a phosphetane oxide or phosphetane sulphide of the general Formulae I and II: ##EQU1## wherein X represents a C 1 -C 18 alkyl, C 2 -C 18 alkenyl, C 6 -C 14 aryl, C 7 -C 20 aralkyl, C 1 -C 18 alkoxy or C 6 -C 14 aroxy group and R 1 to R 6 represent hydrogen and/or C 1 -C 4 alkyl groups and is reacted with B. a mono-, di- and/or polyhydric alcohol having a molecular weight of about 32 to about 250, a protonic acid which has a pH of between 1 and 8 in N/10 aqueous solution, a metal salt or an acid chloride.
Inventors
- 👤 Andrea La Spina
- 👤 Werner Dietrich
- 👤 Reinhard Schliebs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:10
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/02; C08G18/025; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6568; C07F9/65681; C07F9/65685; C08G18/06; C08G18/08; C08G18/16; C08G18/166; C08G18/168; C08G2110/00; C08G2110/0025; C08G2110/0041; C08G2110/005; C08G2110/0058; C08G2115/00; C08G2115/06; Y; Y10; Y10S; Y10S521/00; Y10S521/901; Y10S521/902
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
143 words
In a process for making a rigid foam plastic which contains carbodiimide groups from an organic polyisocyanate, the improvement which comprises includig a catalytic amount of an addition compound of a. a phosphetane oxide or phosphetane sulphide of the general formulae I and II ##EQU10## wherein X denotes a C 1 -C 18 alkyl, C 2 -C 18 alkenyl, C 6 -C 14 aryl, C 7 -C 20 aralkyl, C 1 -C 18 alkoxy or C 6 -C 14 aroxy group and R 1 to R 6 denote hydrogen and/or C 1 -C 4 alkyl groups and b. a mono-, di- and/or polyhydric alcohol with a molecular weight of about 32 to about 250, a protonic acid which has a pH of between 1 and 8 in N/10 aqueous solution, a metal salt or an acid chloride and allowing the polyisocyanate to react.
Claim 2
Dependent Claim
143 words
In a process for making a rigid foam plastic which contains carbodiimide groups from an organic polyisocyanate, the improvement which comprises includig a catalytic amount of an addition compound of a. a phosphetane oxide or phosphetane sulphide of the general formulae I and II ##EQU10## wherein X denotes a C 1 -C 18 alkyl, C 2 -C 18 alkenyl, C 6 -C 14 aryl, C 7 -C 20 aralkyl, C 1 -C 18 alkoxy or C 6 -C 14 aroxy group and R 1 to R 6 denote hydrogen and/or C 1 -C 4 alkyl groups and b. a mono-, di- and/or polyhydric alcohol with a molecular weight of about 32 to about 250, a protonic acid which has a pH of between 1 and 8 in N/10 aqueous solution, a metal salt or an acid chloride and allowing the polyisocyanate to react.
Claim 3
Dependent Claim
48 words
The process of claim 1 wherein up to 50 equivalents percent, based on the quantity of isocyanate, of a compound with a molecular weight of about 62 to about 10,000, which contains at least two hydrogen atoms which are reactive with isocyanates are included in the reaction mixture.
Claim 4
Dependent Claim
32 words
The process of claim 1 wherein from about 0.5 to 20% by weight, based on the quantity of isocyanate, of a catalyst which forms isocyanurate groups is included in the reaction mixture.
Claim 5
Dependent Claim
40 words
The process of claimm 1 wherein the polyisocyanate is an undistilled phosgenation product of tolylene diamine or a mixture of tolylene-2,4- and/or -2,6-diisocyanate and 5% to 60% by weight of the distillation residue obtained from the production of tolylene diisocyanate.
Claim 6
Dependent Claim
41 words
The process of claim 1 wherein the polyisocyanate is a mixture of polyisocyanates obtained by the condensation of aniline with formaldehyde followed by phosgenation and 5% to 50% by weight, of the distillation residue obtained from the production of tolylene diisocyanate.
Claim 7
Dependent Claim
31 words
The process of claim 1 wherein a mixture which is stable when stored at room temperature containing the polyisocyanate and the catalyst is heated to 40° to 200°C to start foaming.
Claim 8
Dependent Claim
60 words
A process of making a polycarbodiimide foam from an organic polyisocyanate which comprises heating the polyisocyanate in the presence of a catalytic amount of an addition compound of a phosphetane or phosphetane sulphide and an alcohol, a protonic acid adapted to form a N/10 aqueous solution having a pH of 1 to 8, a metal salt or an acid chloride.
Claim 9
Dependent Claim
60 words
A process of making a polycarbodiimide foam from an organic polyisocyanate which comprises heating the polyisocyanate in the presence of a catalytic amount of an addition compound of a phosphetane or phosphetane sulphide and an alcohol, a protonic acid adapted to form a N/10 aqueous solution having a pH of 1 to 8, a metal salt or an acid chloride.
Claim 10
Dependent Claim
35 words
The process of claim 7 wherein a blowing agent, an organic polyisocyanate and a compound having at least two hydrogen atoms determined by the Zerewitinoff method are heated to form a polycarbodiimide-polyurethane or polyurea foam.
References Cited (Backward Citations)
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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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |