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US4152350A
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Process for the preparation of polyisocyanates containing biuret groups
Assignee: Bayer AG
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Filing: 1977-11-14
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Granted: 1979-05-01
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Expires: 1997-11-14
Abstract
Abstract This invention relates to an improved process for the preparation of polyisocyanate mixtures containing biuret groups by the reaction of organic diisocyanates with compounds which react with isocyanate groups to form biuret groups, to the polyisocyanate mixtures obtained by this process and to the use thereof for the preparation of polyurethane resins by the isocyanate polyaddition process.
Inventors
- 👤 Edgar Mohring
- 👤 Kuno Wagner
- 👤 Hanns P. Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:16
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/46; C07C275/58; C07C275/60; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7831; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
44 words
A process for the preparation of polyisocyanate mixtures containing biuret groups by the reaction of excess quantities of organic polyisocyanates with compounds which react with isocyanate groups to form biuret groups, characterized in that the organic polyisocyanates are reacted with a mixture with contains
Claim 2
Dependent Claim
44 words
A process for the preparation of polyisocyanate mixtures containing biuret groups by the reaction of excess quantities of organic polyisocyanates with compounds which react with isocyanate groups to form biuret groups, characterized in that the organic polyisocyanates are reacted with a mixture with contains
Claim 3
Dependent Claim
12 words
(A) at least one monohydric primary or secondary aliphatic or cycloaliphatic alcohol;
Claim 4
Dependent Claim
12 words
(A) at least one monohydric primary or secondary aliphatic or cycloaliphatic alcohol;
Claim 5
Dependent Claim
21 words
(B) at least one monoamine or polyamine having at least one aliphatically, cycloaliphatically or araliphatically bound primary amino group; and, optionally,
Claim 6
Dependent Claim
21 words
(B) at least one monoamine or polyamine having at least one aliphatically, cycloaliphatically or araliphatically bound primary amino group; and, optionally,
Claim 7
Dependent Claim
9 words
(C) water or a compound which splits off water.
Claim 8
Dependent Claim
9 words
(C) water or a compound which splits off water.
Claim 9
Dependent Claim
47 words
A process according to claim 1, characterized in that the organic polyisocyanates are reacted with such quantities of the mixture of components (A), (B) and (C) that an equivalent ratio of isocyanate groups to (primary amino groups+alcoholic hydroxyl groups+water) of from about 3:1 to 100:1 is present.
Claim 10
Dependent Claim
66 words
A process according to claim 1, characterized in that components (A), (B) and (C) are put into the process in such quantities that the equivalent ratio of the hydroxyl groups of component (A) to water (component (C)) is from about 1:0 to 1:2 and the equivalent ratio of (hydroxyl groups of component (A)+water) to (primary amino groups of component (B)) is from about 2:1 to 1:2.
Claim 11
Dependent Claim
20 words
The process of claim 1 wherein the monohydric aliphatic or cycloaliphatic alcohol is a monohydric primary aliphatic or cycloaliphatic alcohol.
Claim 12
Dependent Claim
13 words
Polyisocyanate mixtures containing biuret groups obtainable according to the process of claim 4.
Claim 13
Dependent Claim
109 words
A process for the preparation of polyisocyanate mixtures containing biuret groups comprising reacting (A) excess quantities of organic polyisocyanates with (B) a biuretizing mixture comprising (i) at least one monohydric primary or secondary aliphatic or cycloaliphatic alcohol, (ii) at least one monoamine or polyamine having at least one aliphatically, cycloaliphatically or araliphatically bound primary amino group, and (iii) water or a compound which splits off water wherein the equivalent ratio of hydroxyl groups of component (i) to water is from about 1:0 to 1:2 and the equivalent ratio of hydroxyl groups of component (i) plus water to primary amino groups of component (ii) is from about 5:1 to 1:5.
Claim 14
Dependent Claim
109 words
A process for the preparation of polyisocyanate mixtures containing biuret groups comprising reacting (A) excess quantities of organic polyisocyanates with (B) a biuretizing mixture comprising (i) at least one monohydric primary or secondary aliphatic or cycloaliphatic alcohol, (ii) at least one monoamine or polyamine having at least one aliphatically, cycloaliphatically or araliphatically bound primary amino group, and (iii) water or a compound which splits off water wherein the equivalent ratio of hydroxyl groups of component (i) to water is from about 1:0 to 1:2 and the equivalent ratio of hydroxyl groups of component (i) plus water to primary amino groups of component (ii) is from about 5:1 to 1:5.
Claim 15
Dependent Claim
33 words
The process of claim 6 wherein the equivalent ratio of isocyanate groups to hydroxyl groups of component (i) plus primary amino groups of component (ii) plus water is from about 3:1 to 100:1.
Claim 16
Dependent Claim
33 words
The process of claim 7 wherein the equivalent ratio of isocyanate groups to hydroxyl groups of component (i) plus primary amino groups of component (ii) plus water is from about 5:1 to 15:1.
Claim 17
Dependent Claim
30 words
The process of claim 6 wherein the equivalent ratio of hydroxyl groups of component (i) plus water to primary amino groups of component (ii) is from about 2:1 to 1:2.
Claim 18
Dependent Claim
95 words
The process of claim 6 wherein component (i) is a monohydric alcohol of the formula Y--OH wherein Y is a straight- or branched-chain aliphatic hydrocarbon group having from 1 to 15 carbon atoms or a cycloaliphatic hydrocarbon group having from 4 to 15 carbon atoms, and wherein component (ii) is a diamine of the formula R'--(NH 2 ) 2 wherein R' is an aliphatic hydrocarbon group having from 2 to 12 carbon atoms, a cycloaliphatic hydrocarbon group having from 4 to 17 carbon atoms or an araliphatic group having from 8 to 10 carbon atoms.
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) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |