US3969262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of synthetic plastics comprising urethane groups and biuret groups
Assignee: Bayer AG
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Filing: 1974-08-27
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Granted: 1976-07-13
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Expires: 1994-08-27
Abstract
Abstract A process is provided for the production of synthetic polyurethane plastics, particularly foam plastics, containing biuret groups by reacting polyisocyanates, polyhydroxyl and/or polycarboxyl compounds, flame inhibitors and, if desired, blowing agents, emulsifiers, activators and other additives which is characterized by using as the polyisocyanate solutions in monomeric polyisocyanates of from about 1 per cent to 85 per cent of polyisocyanates containing biuret groups and having the formula: ##EQU1## in which R is an aromatic, araliphatic or cycloaliphatic radical which may, if desired, be substituted and n is an integer from 0 to 5, wherein the proportion of biuret-polyisocyanates having more than three isocyanate groups is at least 20 per cent by weight based on the total quantity of biuret-polyisocyanates, and the solutions contain from about 0.03 per cent to about 5 per cent by weight of chemically combined emulsifiers.
Inventors
- 👤 Kuno Wagner
- 👤 Werner Dietrich
- 👤 Karl-Josef Kraft
- 👤 Horst Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:54
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7831; C08G18/721; C08G18/725
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A polyisocyanate which comprises a solution in a monomeric polyisocyanate of from about 1 to about 85 percent of a biuret polyisocyanate having the formula: ##EQU3## in which R is an aromatic, araliphatic or cycloaliphatic radical and wherein n is an integer of from 0 to 5 and the proportion of biuret-polyisocyanate having more than three isocyanate groups is at least 20 percent by weight based on the total quantity of biuret-polyisocyanates and the solution contains from about 0.3 to about 5 percent by weight based on the weight of the biuret polyisocyanate of an emulsifier chemically bound to the polyisocyanate, the biuret polyisocyanate being prepared in the presence of the emulsifier, said emulsifier being selected from the group consisting of hydroxyl containing oleyl alcohol polyglycol ether, castor oil polyglycol ether, isononyl phenol polyglycol ether, higher molecular weight n-dodecyl polyglycol ethers having a terminal OH group and the corresponding amine derivatives obtained by cyanoethylation and subsequent hydrogenation by the foregoing compounds.
Claim 2
Dependent Claim
161 words
A polyisocyanate which comprises a solution in a monomeric polyisocyanate of from about 1 to about 85 percent of a biuret polyisocyanate having the formula: ##EQU3## in which R is an aromatic, araliphatic or cycloaliphatic radical and wherein n is an integer of from 0 to 5 and the proportion of biuret-polyisocyanate having more than three isocyanate groups is at least 20 percent by weight based on the total quantity of biuret-polyisocyanates and the solution contains from about 0.3 to about 5 percent by weight based on the weight of the biuret polyisocyanate of an emulsifier chemically bound to the polyisocyanate, the biuret polyisocyanate being prepared in the presence of the emulsifier, said emulsifier being selected from the group consisting of hydroxyl containing oleyl alcohol polyglycol ether, castor oil polyglycol ether, isononyl phenol polyglycol ether, higher molecular weight n-dodecyl polyglycol ethers having a terminal OH group and the corresponding amine derivatives obtained by cyanoethylation and subsequent hydrogenation by the foregoing compounds.
Claim 3
Dependent Claim
18 words
The polyisocyanate of claim 1 wherein the solution of the biuret polyisocyanate contains organic polyisocyanates containing urethane groups.
Claim 4
Dependent Claim
18 words
The polyisocyanate of claim 1 wherein the solution of the biuret polyisocyanate contains organic polyisocyanates containing isocyanurate groups.
Claim 5
Dependent Claim
36 words
The polyisocyanate of claim 1 wherein the proportion of the biuret polyisocyanate having more than three isocyanate groups is from about 40 to about 70 percent by weight based on the total quantity of biuret polyisocyanate.
Claim 6
Dependent Claim
22 words
The polyisocyanate of claim 1 wherein the solution contains from about 0.1 to about 2 percent by weight of chemically combined emulsifiers.
Claim 7
Dependent Claim
28 words
The polyisocyanate of claim 1 wherein the emulsifiers are chemically bound to the isocyanate through an OH, amino, amido, --COOH, --SH or urethane group reactive with NCO groups.
Claim 8
Dependent Claim
74 words
The polyisocyanate of claim 1 wherein the emulsifier is an hydroxyl containing oleyl alcohol polyglycol ether, castor oil polyglycol ether, isononylphenol polyglycol ether, 3-benzyl-4-hydroxy diphenyl polyglycol ether, polyglycol ethers having an average molecular weight of about 2000 which contain an n-dodecyl group and a terminal OH group; the corresponding amine derivatives of the foregoing compounds; the ammonium salts of oleic acids and long chain fatty acids or their salts with primary or secondary amines.
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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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |