Patent US4143003A successfully refreshed from Google Patents.
US4143003A
Expired / Lapsed
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Polyurethanes made with linear polyamines
Assignee: Bayer AG
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Filing: 1977-05-27
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Granted: 1979-03-06
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Expires: 1997-05-27
Abstract
Abstract This invention relates to a process for the production of polyurethane resins (more particularly foam resins) in which linear polyamines containing at least four tertiary nitrogen atoms are used as catalysts. The compounds correspond to the general formula: ##STR1## wherein the groups R, which may be the same or different, represent methyl or ethyl groups; m represents an integer of from 2 to 7; and the integers n, which may be the same or different, represent 2 or 3.
Inventors
- 👤 Peter Haas
- 👤 Johannes Blahak
- 👤 Hans-Joachim Meiners
- 👤 Werner Mormann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:38
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; B; B60; B60G; B60G11/00; B60G11/14; B60G11/32; B60G11/48; B60G11/52; C08G18/1808; B60G2204/00; B60G2204/10; B60G2204/12; B60G2204/124
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
98 words
A process for the production of polyurethane resins comprising reacting: (a) polyisocyanates, with (b) higher molecular weight compounds having at least two hydrogen atoms which are reactive with isocyanates, and, optionally, (c) chain lengthening agents, in the presence of (d) tertiary amines as catalysts wherein component (d) are compounds corresponding to the following general formula: ##STR14## wherein the groups R, which may be the same or different, represent C 1 -C 5 alkyl radicals; m represents an integer of from 2 to 7; and the integers n, which may be the same or different, represent 2 or 3.
Claim 2
Dependent Claim
98 words
A process for the production of polyurethane resins comprising reacting: (a) polyisocyanates, with (b) higher molecular weight compounds having at least two hydrogen atoms which are reactive with isocyanates, and, optionally, (c) chain lengthening agents, in the presence of (d) tertiary amines as catalysts wherein component (d) are compounds corresponding to the following general formula: ##STR14## wherein the groups R, which may be the same or different, represent C 1 -C 5 alkyl radicals; m represents an integer of from 2 to 7; and the integers n, which may be the same or different, represent 2 or 3.
Claim 3
Dependent Claim
27 words
The process of claim 1, wherein cellular polyurethane resins are produced by including in the reaction mixture a blowing agent and optionally stabilizers and other known additives.
Claim 4
Dependent Claim
14 words
The process of claim 1, wherein the R groups are methyl or ethyl groups.
Claim 5
Dependent Claim
13 words
The process of claim 1, wherein the R groups are all methyl groups.
Claim 6
Dependent Claim
15 words
The process of claim 1, wherein m represents an integer of from 2 to 4.
Claim 7
Dependent Claim
56 words
Compounds corresponding to the following general formula: ##STR15## wherein the groups R, which may be the same or different, represent methyl or ethyl groups; m represents an integer of from 2 to 7; and the integers n, which may be the same or different, represent 2 or 3, but at least one of them represents 3.
Claim 8
Dependent Claim
56 words
Compounds corresponding to the following general formula: ##STR15## wherein the groups R, which may be the same or different, represent methyl or ethyl groups; m represents an integer of from 2 to 7; and the integers n, which may be the same or different, represent 2 or 3, but at least one of them represents 3.
Claim 9
Dependent Claim
6 words
A compound of claim 6 ##STR16##
Claim 10
Dependent Claim
6 words
A compound of claim 6 ##STR17##
Claim 11
Dependent Claim
6 words
A compound of claim 6 ##STR18##
Claim 12
Dependent Claim
3 words
The compound ##STR19##
Claim 13
Dependent Claim
3 words
The compound ##STR19##
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) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |