US4735970A
Expired / Lapsed
US
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Process for the production of a cellular polyurethane
Assignee: Bayer AG
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Filing: 1987-03-02
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Granted: 1988-04-05
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Expires: 2007-03-02
Abstract
Abstract The present invention is directed to a process for preparing a cellular polyurethane by reacting with an NCO-reactive component in the presence of a homogeneous mixture of an optionally water-containing adduct of carbon dioxide an amine containing at least one secondary amino group, low primary amino groups and at least one primary or secondary hydroxyl group (provided there are not more primary hydroxyl groups than amino groups), an amine catalyst and optionally monofluorotrichlormethane. The present invention is directed to the homogeneous mixture these three components.
Inventors
- 👤 Claus-Dieter Sommerfeld
- 👤 Werner Rasshofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:42
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/6505; C08G18/6523; C08G18/6535; C08G18/30; C08G18/32; C08G18/3271; C08G18/3296
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
191 words
A process for the production of a cellular polyurethane which comprises reacting: (A) a polyisocyanate with (B) an NCO-reactive component comprising (1) a compound containing at least one NCO-reactive group and having a molecular weight of 60 to 1999 and a functionality of 2 to 8, (2) optionally a compound containing at least one NCO-reactive group and having a molecular weight of 1000 to about 12,000 and a functionality of 2 to 8, in the presence of a homogeneous mixture which comprises, based on 100 parts by weight of B 1. +B 2., (3) about 0.05 to 25 parts by weight of an optionally water-containing adduct of carbon dioxide with an -amine-containing at least one secondary amino group, no primary amino groups, and at least one primary or secondary hydroxyl group provided there are not more primary hydroxyl groups than amino groups, and (4) about 0.05 to 25 parts by weight of an amine catalyst, and (5) about 0.5 50 parts by weight of monofluorotrichloromethane, optionally in the presence of (C) water and/or further inorganic or organic blowing agents, foam stabilizers and other additives usual in the production of cellular polyurethanes.
Claim 2
Dependent Claim
191 words
A process for the production of a cellular polyurethane which comprises reacting: (A) a polyisocyanate with (B) an NCO-reactive component comprising (1) a compound containing at least one NCO-reactive group and having a molecular weight of 60 to 1999 and a functionality of 2 to 8, (2) optionally a compound containing at least one NCO-reactive group and having a molecular weight of 1000 to about 12,000 and a functionality of 2 to 8, in the presence of a homogeneous mixture which comprises, based on 100 parts by weight of B 1. +B 2., (3) about 0.05 to 25 parts by weight of an optionally water-containing adduct of carbon dioxide with an -amine-containing at least one secondary amino group, no primary amino groups, and at least one primary or secondary hydroxyl group provided there are not more primary hydroxyl groups than amino groups, and (4) about 0.05 to 25 parts by weight of an amine catalyst, and (5) about 0.5 50 parts by weight of monofluorotrichloromethane, optionally in the presence of (C) water and/or further inorganic or organic blowing agents, foam stabilizers and other additives usual in the production of cellular polyurethanes.
Claim 3
Dependent Claim
56 words
The process of claim 1 wherein component B 3. is prepared by reacting carbon dioxide with an amine at temperatures of about -25° C. to 160° C. in the absence of optionally halogenated aliphatic hydrocarbon solvents, optionally nitrated, halogenated or alkylated aromatic hydrocarbon solvent, lower aliphatic alcohol solvents, acid amide solvents, lactam solvents, and aprotic-polar solvents.
Claim 4
Dependent Claim
57 words
The process of claim 1 wherein component B 3. has (a) a basic nitrogen content of about 3.5 to 17.5% by weight, (b) a hydroxyl group content about 8.5 to 23% by weight, (c) a carbon dioxide content of about 1 to 37% by weight and (d) a water content of 0 to about 15% by weight.
Claim 5
Dependent Claim
24 words
The process of claim 1 wherein said polyisocyanate of component A is based on toluene diisocyanate or a phosgenation product of an aniline-formaldehyde condensate.
Claim 6
Dependent Claim
28 words
The process of claim 1 wherein component B 1. comprises a polyether containing 3 to 6 hydroxyl groups and having a molecular weight of about 200 to 1000.
Claim 7
Dependent Claim
16 words
The process of claim 1 wherein the amine used to prepare component B 3. is N-methyl-2-aminoethanol.
Claim 8
Dependent Claim
14 words
The process of claim 1 where reaction is carried out by the frothing method.
Claim 9
Dependent Claim
78 words
A homogeneous mixture consisting of (3) about 0.05 to 25 parts by weight of an optionally water-containing adduct of carbon dioxide with an amine containing at least one secondary amino group, no primary amino groups and at least one primary or secondary hydroxyl group provided there are not more primary hydroxyl groups than amino groups, (4) about 0,05 to 25 parts by weight of an amine catalyst and (5) about 0.5 to 50 parts by weight of monofluorotrichloromethane.
Claim 10
Dependent Claim
78 words
A homogeneous mixture consisting of (3) about 0.05 to 25 parts by weight of an optionally water-containing adduct of carbon dioxide with an amine containing at least one secondary amino group, no primary amino groups and at least one primary or secondary hydroxyl group provided there are not more primary hydroxyl groups than amino groups, (4) about 0,05 to 25 parts by weight of an amine catalyst and (5) about 0.5 to 50 parts by weight of monofluorotrichloromethane.
Claim 11
Dependent Claim
59 words
The homogeneous mixture of claim 8 wherein component B 3. has (a) a basic nitrogen content of about 3.5 to 17.5% by weight, (b) a hydroxyl group content of about 8.5% to 23% by weight, (c) a carbon dioxide content of about 1 to 37% by weight and (d) a water content of 0 to about 15% by weight.
Claim 12
Dependent Claim
16 words
The mixture of claim 8 wherein the amine used to prepare component B 3 is N-methyl-2-aminoethanol.
Claim 13
Dependent Claim
20 words
The process of claim 1 wherein said amine contains one secondary amino group and one primary or secondary hydroxyl group.
Claim 14
Dependent Claim
21 words
The homogeneous mixture of claim 8 wherein said amine contains one secondary amino group and one primary or secondary hydroxyl group.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |