US4933416A
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Polyisocyanate compositions
Assignee: Imperial Chemical Industries Ltd
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Filing: 1988-03-04
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Granted: 1990-06-12
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Expires: 2008-03-04
Abstract
Abstract A polyisocyanate composition comprising a reaction product of a stoichiometric excess of an organic polyisocyanate and: (i) a polymeric polyol having an average nominal hydroxyl functionality greater than 2 and an average hydroxyl equivalent weight of from about 500 to about 5000, and (ii) a polymeric polyamine having an average nominal primary and/or secondary amino functionality of from about 2 to about 3 and an average amine equivalent weight of from about 500 to about 5000, the polyol and the polyamine having glass transition temperatures below room temperature. The composition is especially useful in the production of elastomers by the RIM process.
Inventors
- 👤 Herbert R. Gillis
- 👤 Eduard F. Cassidy
- 👤 Alain Parfondry
- 👤 Jan W. Leenslag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:46
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G18/6685; C08G18/08; C08G18/10; C08G18/12; C08G18/30; C08G18/32; C08G18/3225; C08G18/3253; C08G18/3256; C08G18/4009; C08G18/4804; C08G18/482; C08G18/50; C08G18/5021; C08G18/5024; C08G18/503; C08G2120/00; C08G2125/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
158 words
A liquid polyisocyanate prepolymer composition having a free-NCO content in the range of 8-25 percent by weight comprising a reaction product under substantially anhydrous conditions of a stoichiometric excess of an organic polyisocyanate and: (I) a polymeric polyol having an average nominal hydroxyl functionality greater than 2 and an average hydroxyl equivalent weight of from about 500 to about 5000, and (II) a polymeric polyamine having an average nominal primary and/or secondary amino functionality of from about 2 to about 3 and an average amine equivalent weight of from about 500 to 5000, the polyol and the polyamine having glass transition temperature below room temperature, whereby the ratio of --NCO groups on said organic polyisocyanate to the hydroxyl and amino groups on said polyol and said polyamine range from about 4.5:1 to about 35:1 and the relative proportions of polyol and polyamine correspond to an initial hydroxyl to amino group ratio in the range of 5:95 to 95:5.
Claim 2
Dependent Claim
158 words
A liquid polyisocyanate prepolymer composition having a free-NCO content in the range of 8-25 percent by weight comprising a reaction product under substantially anhydrous conditions of a stoichiometric excess of an organic polyisocyanate and: (I) a polymeric polyol having an average nominal hydroxyl functionality greater than 2 and an average hydroxyl equivalent weight of from about 500 to about 5000, and (II) a polymeric polyamine having an average nominal primary and/or secondary amino functionality of from about 2 to about 3 and an average amine equivalent weight of from about 500 to 5000, the polyol and the polyamine having glass transition temperature below room temperature, whereby the ratio of --NCO groups on said organic polyisocyanate to the hydroxyl and amino groups on said polyol and said polyamine range from about 4.5:1 to about 35:1 and the relative proportions of polyol and polyamine correspond to an initial hydroxyl to amino group ratio in the range of 5:95 to 95:5.
Claim 3
Dependent Claim
19 words
A composition according to claim 1 wherein the organic polyisocyanate comprises 4,4'-diphenylmethane diisocyanate, 2,4'-diphenylmethane diisocyanate or a mixture thereof.
Claim 4
Dependent Claim
26 words
A composition according to claim 1 or claim 2 wherein the average nominal hydroxyl functionality of the polyol is in the range from 2.5 to 4.
Claim 5
Dependent Claim
18 words
A composition according to claim 3 wherein the average nominal hydroxyl functionality of the polyol is about 3.
Claim 6
Dependent Claim
23 words
A composition according to claim 1 wherein the average hydroxyl equivalent weight of the polyol is in the range from 800 to 2000.
Claim 7
Dependent Claim
13 words
A composition according to claim 1 wherein the polyol is a polyether polyol.
Claim 8
Dependent Claim
15 words
A composition according to claim 6 wherein the polyether is a polyoxypropylene or poly(oxyethylene-oxypropylene) triol.
Claim 9
Dependent Claim
22 words
A composition according to claim 1 wherein at least 70% of the amino groups in the polymeric polyamine are primary amino groups.
Claim 10
Dependent Claim
23 words
A composition according to claim 1 wherein the average nominal amino functionality of the polyamine is in the range from 2.5 to 3.
Claim 11
Dependent Claim
23 words
A composition according to claim 1 wherein the average amine equivalent weight of the polyamine is in the range from 800 to 2000.
Claim 12
Dependent Claim
20 words
A composition according to claim 10 wherein the average amine equivalent weight is in the range from 800 to 1700.
Claim 13
Dependent Claim
13 words
A composition according to claim 1 wherein the polyamine is a polyether polyamine.
Claim 14
Dependent Claim
15 words
A composition according to claim 12 wherein the polyether is a polyoxypropylene diamine or triamine.
Claim 15
Dependent Claim
18 words
A composition according to claim 1 wherein the NCO content is in the range from 12 to 20.
Claim 16
Dependent Claim
47 words
A composition according to claim 1 comprising the product obtained by reacting the excess of organic polyisocyanate with a mixture of the polymeric polyol and the polymeric polyamine or sequentially with the polymeric polyol and the polymeric polyamine or with the polymeric polyamine and the polymeric polyol.
Claim 17
Dependent Claim
38 words
A composition according to claim 15 comprising the product obtained by reacting the excess of organic polyisocyanate with the polymeric polyol to form an isocyanate terminated polyol based prepolymer and subsequently reacting the prepolymer with the polymeric polyamine.
Claim 18
Dependent Claim
21 words
A composition according to claim 1 wherein the hydroxyl to amino group ratio is in the range from 25:75 to 75:25.
Claim 19
Dependent Claim
21 words
A composition according to claim 17 wherein the hydroxyl to amino group ratio is in the range from 35:65 to 65:35.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |