US5034427A
Expired / Lapsed
US
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Method for preparing moulded polureapolyurethane flexible foams
Assignee: Imperial Chemical Industries Ltd
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Filing: 1989-11-22
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Granted: 1991-07-23
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Expires: 2009-11-22
Abstract
Abstract A method to prepare polyurethane and/or polyurea flexible foams which comprises reacting: A. an organic polyisocyanate composition B. an isocyanate-reactive composition containing: a. at least one high Mw isocyanate-reactive compound b1. a primary or secondary amino-functional compound (so-called chain-extender) of Mw below 1000 in an amount of less than 1% by wt of high Mw isocyanate-reactive compound(s) or b2. a mixture of at least two chain extenders of which at least one is a primary or secondary amino-functional compound of Mw below 1000, in an amount of 0.1% to 10% by wt of high Mw isocyanate-reactive compound(s) C. H2O D. optionally catalysts E. optionally further blowing agents which are different from H2O. F. optionally further conventional additives.
Inventors
- 👤 Roberto Frigo
- 👤 Gian-Carlo Bagaglio
- 👤 Mireille De Witte
- 👤 Gabriel Verhelst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:14
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5024; C08G18/503; C08G18/65; C08G18/6505; C08G18/6523; C08G18/6529; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/005; C08G2110/0075; C08G2110/0083
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
A method to prepare polyurethane and/or polyurea flexible foams which comprises reacting: A. an organic polyisocyanate composition B. an isocyanate-reactive composition containing: a. at least one high Mw isocyanate-reactive compound b 1 . a compound selected from the group consisting of DETDA and isophorone diamine of Mw below 1000 in an amount of less than 1% by wt of high Mw isocyanate-reactive compound(s) or b 2 . a mixture of at least two chain extenders of which at least one is a compound selected from the group consisting of DETDA and isophorone diamine of Mw below 1,000, in an amount of 0.1% to 10% by wt of which Mw isocyanate-reactive compound(s) C. H 2 O D. optionally catalysts E. optionally further blowing agents which are different from H 2 O. F. optionally further conventional additives.
Claim 2
Independent Claim
135 words
A method to prepare polyurethane and/or polyurea flexible foams which comprises reacting: A. an organic polyisocyanate composition B. an isocyanate-reactive composition containing: a. at least one high Mw isocyanate-reactive compound b 1 . a compound selected from the group consisting of DETDA and isophorone diamine of Mw below 1000 in an amount of less than 1% by wt of high Mw isocyanate-reactive compound(s) or b 2 . a mixture of at least two chain extenders of which at least one is a compound selected from the group consisting of DETDA and isophorone diamine of Mw below 1,000, in an amount of 0.1% to 10% by wt of which Mw isocyanate-reactive compound(s) C. H 2 O D. optionally catalysts E. optionally further blowing agents which are different from H 2 O. F. optionally further conventional additives.
Claim 3
Dependent Claim
35 words
A method according to claim 1 in which the primary or secondary amino-functional compound in the mixture b 2 is present in an amount of less than 1% by weight of high Mw isocyanate-reactive compound(s).
Claim 4
Independent Claim
46 words
A method according to any one of claims 1 or 2, wherein the high molecular weight isocyanate-reactive compound(s) has/have a molecular weight of 1000 to 10,000, and a functionality of 2-4, and are selected from the group consisting of polyoxyalkylene polyether polyols and polyoxyalkylene polyether polyamines.
Claim 5
Independent Claim
26 words
A method according to any one of the preceding claims wherein the mixture of chain-extenders b 2 comprises a second chain-extender selected among amino-compounds, amino-alcohols, polyols.
Claim 6
Independent Claim
31 words
A method according to any one of the preceding claims wherein there is used H 2 O in an amount of 1.5% to 10% by wt of high Mw isocyanate-reactive compound(s).
Claim 7
Dependent Claim
27 words
A method according to claim 5 wherein there is used H 2 O in an amount of 2.5% to 6% by weight of high Mw isocyanate-reactive compound(s).
Claim 8
Independent Claim
38 words
A method according to any one of the preceding claims wherein the isocyanate composition (A), the isocyanate-reactive composition (B) and H 2 O are used in such amounts to provide an isocyanate index ranging from 40 to 120.
Claim 9
Dependent Claim
18 words
A method according to claim 7 wherein there is provided an isocyanate index ranging from 50 to 100.
Claim 10
Dependent Claim
128 words
A reaction system for performing a method according to any one of the preceding claims which comprises: A. an organic polyisocyanate composition B. an isocyanate-reactive composition containing: a. at least one high Mw isocyanate-reactive compound b 1 . an amino-functional compound (so-called chain-extender) of Mw below 1000 a primary or secondary in an amount of less than 1% by wt of high Mw isocyanate-reactive compound(s) or b 2 . a mixture of at least two chain extenders of which at least one is an amino-functional compound of Mw below 1000, in an amount of 0.1% to 10% by wt of high Mw isocyanate-reactive compound(s) C. H 2 O D. optionally catalysts E. optionally further blowing agents which are different from H 2 O F. optionally further conventional additives.
Claim 11
Dependent Claim
32 words
A flexible foam which is obtained by using a method according to any one of claims 1 to 8 or which is obtained by using a reaction system according to claim 9.
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) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |