US4970243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of flexible slabstock polyurethane foams
Assignee: Bayer AG
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Filing: 1989-06-06
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Granted: 1990-11-13
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Expires: 2009-06-06
Abstract
Abstract This invention relates to a process for the production of elastic, open-cell flexible slabstock polyurethane foams comprising reacting at an isocyanate index less than about 80 one or more polyisocyanates selected from the group tolylene diisocyanates, hexamethylene diisocyanate, and isophorone diisocyanate, with compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of about 400 to about 10,000, in the presence of water as blowing agent in a quantity of about 5 to about 15 parts by weight for every 100 parts by weight of the isocyanate-reactive compound. The process may optionally include chain-extending and crosslinking agents containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of about 32 to about 399, and may optionally be carried out in the presence of other blowing agents, catalysts, auxiliaries, and additives.
Inventors
- 👤 Gundolf Jacobs
- 👤 Peter Haas
- 👤 Hans-Walter Illger
- 👤 Hans-Joachim Kogelnik
- 👤 Klaus-Dieter Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:50
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7614; C08G18/7621; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/005; C08G2110/0075; C08G2110/0083; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
93 words
A process for the production of an elastic, open-cell flexible slabstock polyurethane foam comprising reacting at an isocyanate index less than about 80, (a) one or more polyisocyanates selected from the group consisting of tolylene diisocyanates, hexamethylene diisocyanate, and isophorone diisocyanate, with (b) a compound containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of about 400 to about 10,000, in the presence of (c) water as blowing agent in a quantity of about 5 to about 15 parts by weight for every 100 parts by weight of component (b).
Claim 2
Dependent Claim
93 words
A process for the production of an elastic, open-cell flexible slabstock polyurethane foam comprising reacting at an isocyanate index less than about 80, (a) one or more polyisocyanates selected from the group consisting of tolylene diisocyanates, hexamethylene diisocyanate, and isophorone diisocyanate, with (b) a compound containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of about 400 to about 10,000, in the presence of (c) water as blowing agent in a quantity of about 5 to about 15 parts by weight for every 100 parts by weight of component (b).
Claim 3
Dependent Claim
17 words
A process according to claim 1 wherein the isocyanate index is from about 40 to about 65.
Claim 4
Dependent Claim
23 words
A process according to claim 1 wherein the polyurethane foam has a gross density of about 8 to about 27 kg/m 3 .
Claim 5
Dependent Claim
23 words
A process according to claim 1 wherein the polyurethane foam has a gross density of about 10 to about 20 kg/m 3 .
Claim 6
Dependent Claim
15 words
A process according to claim 1 wherein component (a) is one or more tolylene diisocyanates.
Claim 7
Dependent Claim
18 words
A process according to claim 5 wherein component (a) is a mixture of 2,4-tolylene diisocyanate and 2,6-tolylene diisocyanate.
Claim 8
Dependent Claim
19 words
A process according to claim 1 wherein component (b) is a polyether containing from 2 to 6 hydroxyl groups.
Claim 9
Dependent Claim
15 words
A process according to claim 7 wherein the polyether contains 2 or 3 hydroxyl groups.
Claim 10
Dependent Claim
92 words
A process according to claim 1 for the production of an elastic, open-cell flexible slabstock polyurethane foam having a gross density of about 10 to about 20 kg/m 3 comprising reacting at an isocyanate index of from about 40 to about 65, (a) a mixture of 2,4-tolylene diisocyanate and 2,6-tolylene diisocyanate, with (b) a polyether containing from 2 to 6 hydroxyl groups, in the presence of (c) water as blowing agent in a quantity of about 5 to about 15 parts by weight for every 100 parts by weight of component (b).
Claim 11
Dependent Claim
32 words
A process according to claim 1 additionally containing (d) a chain-extending or crosslinking agent containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of about 32 to about 399.
Claim 12
Dependent Claim
32 words
A process according to claim 9 additionally containing (d) a chain-extending or crosslinking agent containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of about 32 to about 399.
Claim 13
Dependent Claim
20 words
A process according to claim 1 additionally carried out in the presence of other blowing agents, catalysts, auxiliaries, and additives.
Claim 14
Dependent Claim
20 words
A process according to claim 9 additionally carried out in the presence of other blowing agents, catalysts, auxiliaries, and additives.
References Cited (Backward Citations)
GB892776A
Cited
US4916168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |