US4352896A
Expired / Lapsed
US
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Polyol mixtures containing reactive blowing agents and use thereof for the production of foamed polyurethanes
Assignee: Bayer AG
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Filing: 1981-10-08
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Granted: 1982-10-05
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Expires: 2001-10-08
Abstract
Abstract This invention relates to mixtures of polyols which are liquid at room temperature with functional aldoximes as blowing agents, wherein the aldoxime groups react with polyisocyanates to liberate carbon dioxide and are simultaneously incorporated by means of the functional group thereof into the polyurethane formed. The present invention also relates to a process for the production of polyurethane foams using these incorporated reactive blowing agents as the primary blowing agent in combination with blowing agents known in polyurethane chemistry. The process according to the invention described herein is suitable for the production of various polyurethane foams or cellular polyurethane elastomers, particularly including the production of semi-rigid and rigid polyurethane integral skin foams which are obtained by foaming the reaction mixture in closed molds.
Inventors
- 👤 Richard Kopp
- 👤 Holger Meyborg
- 👤 Jurgen Schwindt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:28
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
111 words
Mixtures containing aldoximes as blowing agents comprising (A) a polyol or polyol mixture which is liquid below 45° C. and has an average molecular weight of from 400 to 10,000 in which is dissolved (B) from 0.1 to 20%, by weight, of an aldoxime reactive blowing agent corresponding to the following general formula: ##STR20## wherein X represents --OH, --COOH, an aromatically-bound amino-NH 2 , or an aromatically-bound --NH-- (C 1 -C 8 ) group; and R represents an aliphatic radical containing from 1 to 9 carbon atoms, a cycloaliphatic radical, an aromatic radical, or an araliphatic radical wherein the aliphatic radical is bound to the aromatic nucleus by an oxygen atom.
Claim 2
Dependent Claim
111 words
Mixtures containing aldoximes as blowing agents comprising (A) a polyol or polyol mixture which is liquid below 45° C. and has an average molecular weight of from 400 to 10,000 in which is dissolved (B) from 0.1 to 20%, by weight, of an aldoxime reactive blowing agent corresponding to the following general formula: ##STR20## wherein X represents --OH, --COOH, an aromatically-bound amino-NH 2 , or an aromatically-bound --NH-- (C 1 -C 8 ) group; and R represents an aliphatic radical containing from 1 to 9 carbon atoms, a cycloaliphatic radical, an aromatic radical, or an araliphatic radical wherein the aliphatic radical is bound to the aromatic nucleus by an oxygen atom.
Claim 3
Dependent Claim
19 words
A mixture according to claim 1, characterized in that the polyol or polyol mixture is liquid at room temperature.
Claim 4
Dependent Claim
27 words
A mixture according to claim 1 or claim 2, characterized in that the polyol or polyol mixture has an average molecular weight of from 600 to 4,000.
Claim 5
Dependent Claim
32 words
A mixture according to claim 1 or claim 2, characterized in that 0.2 to 8.0%, by weight, of the functional aldoxime reactive blowing agent is dissolved in the polyol or polyol mixture.
Claim 6
Dependent Claim
32 words
A mixture according to claim 1 or claim 2, characterized in that 0.25 to 5.0%, by weight, of the functional aldoxime reactive blowing agent is dissolved in the polyol or polyol mixture.
Claim 7
Dependent Claim
18 words
A mixture according to claim 1 or claim 2, characterized in that X represents a secondary hydroxyl group.
Claim 8
Dependent Claim
24 words
A mixture according to claim 1 or claim 2, characterized in that R represents an aliphatic radical containing from 1 to 4 carbon atoms.
Claim 9
Dependent Claim
25 words
A mixture according to claim 1 or claim 2, characterized in that R represents a branched aliphatic radical containing from 1 to 9 carbon atoms.
Claim 10
Dependent Claim
24 words
A mixture according to claim 1 or claim 2, characterized in that R represents a cycloaliphatic radical containing an oxygen atom in the ring.
Claim 11
Dependent Claim
25 words
A mixture according to claim 1 or claim 2, characterized in that X represents an hydroxyl group and R represents an aliphatic or cycloaliphatic radical.
Claim 12
Dependent Claim
31 words
A mixture according to claim 1 or claim 2, characterized in that X represents a secondary hydroxyl group and R represents an aliphatic radical containing from 1 to 4 carbon atoms.
Claim 13
Dependent Claim
19 words
A mixture according to claim 1 or claim 2, characterized in that ##STR21## is the aldoxime reactive blowing agent.
Claim 14
Dependent Claim
120 words
A process for the preparation of a polyurethane foam comprising reacting an organic polyisocyanate with mixtures comprising (A) a polyol or polyol mixture which is liquid below 45° C. and has an average molecular weight of from 400 to 10,000 in which is dissolved (B) from 0.1 to 20%, by weight, of an aldoxime reactive blowing agent corresponding to the following general formula ##STR22## wherein X represents --OH, --COOH, an aromatically-bound amino-NH 2 , or an aromatically-bound --NH--(C 1 --C 8 ) group; and R represents an aliphatic radical containing from 1 to 9 carbon atoms, a cycloaliphatic radical, an aromatic radical, or an araliphatic radical wherein the aliphatic radical is bound to the aromatic nucleus by an oxygen atom.
Claim 15
Dependent Claim
120 words
A process for the preparation of a polyurethane foam comprising reacting an organic polyisocyanate with mixtures comprising (A) a polyol or polyol mixture which is liquid below 45° C. and has an average molecular weight of from 400 to 10,000 in which is dissolved (B) from 0.1 to 20%, by weight, of an aldoxime reactive blowing agent corresponding to the following general formula ##STR22## wherein X represents --OH, --COOH, an aromatically-bound amino-NH 2 , or an aromatically-bound --NH--(C 1 --C 8 ) group; and R represents an aliphatic radical containing from 1 to 9 carbon atoms, a cycloaliphatic radical, an aromatic radical, or an araliphatic radical wherein the aliphatic radical is bound to the aromatic nucleus by an oxygen atom.
Claim 16
Dependent Claim
34 words
A process according to claim 13, characterized in that the polyurethane foaming reaction is conducted in the presence of other compounds having molecular weights of from 62 to 400 and having isocyanate-reactive hydrogen atoms.
Claim 17
Dependent Claim
21 words
A process according to claim 14, characterized in that the mixtures also contain chain-terminators, catalysts, other blowing agents, emulsifiers or stabilizers.
Claim 18
Dependent Claim
85 words
A process for the preparation of a polyurethane foam comprising reacting an organic polyisocyanate with mixtures comprising (A) a polyol or polyol mixture, based on polyether, which is liquid at room temperature and has an average molecular weight of from 600 to 4,000 in which is dissolved (B) from 0.25 to 5.0%, by weight, of incorporable aldoxime reactive blowing agent corresponding to the general formula ##STR23## wherein X represents a secondary hydroxyl group; and R represents an aliphatic radical containing up to 4 carbon atoms.
Claim 19
Dependent Claim
85 words
A process for the preparation of a polyurethane foam comprising reacting an organic polyisocyanate with mixtures comprising (A) a polyol or polyol mixture, based on polyether, which is liquid at room temperature and has an average molecular weight of from 600 to 4,000 in which is dissolved (B) from 0.25 to 5.0%, by weight, of incorporable aldoxime reactive blowing agent corresponding to the general formula ##STR23## wherein X represents a secondary hydroxyl group; and R represents an aliphatic radical containing up to 4 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) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |