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US4438252A
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US
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Polymer-modified polyols
Assignee: Imperial Chemical Industries Ltd
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Filing: 1982-07-16
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Granted: 1984-03-20
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Expires: 2002-07-16
Abstract
Abstract A polymer-modified polyol comprises a dispersion in a first polyol which has a molecular weight of at least 1000, an average functionality of more than 2, and a Hydroxyl Number of less than 150, of the reaction product of a polyisocyanate and a second polyol which is either (a) a polyethylene glycol having a molecular weight of up to 600 or (b) a polyol, which is not a polyethylene glycol, and which has a molecular weight of less than 250 and is free from nitrogen atoms. A method of forming the polymer-modified polyol, its use in the manufacture of polyurethane products and the polyurethane products so obtained, are included. The dispersions are particularly useful for preparing highly resilient flexible foams.
Inventors
- 👤 William G. Carroll
- 👤 Peter Farley
- 👤 Raymond J. Marklow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:31
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0861; C08G18/0871; C08G18/0876; C08L; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
A polymer-modified polyol comprising a dispersion in a first polyol which has a molecular weight of at least 1000, an average functionality of more than 2, and a Hydroxyl Number of less than 150, of the reaction product of a polyisocyanate and a second polyol which is either (a) a polyethylene glycol having a molecular weight of up to 600 or (b) a polyol, which is not a polyethylene glycol, and which has a molecular weight of less than 250 and is free from nitrogen atoms.
Claim 2
Dependent Claim
86 words
A polymer-modified polyol comprising a dispersion in a first polyol which has a molecular weight of at least 1000, an average functionality of more than 2, and a Hydroxyl Number of less than 150, of the reaction product of a polyisocyanate and a second polyol which is either (a) a polyethylene glycol having a molecular weight of up to 600 or (b) a polyol, which is not a polyethylene glycol, and which has a molecular weight of less than 250 and is free from nitrogen atoms.
Claim 3
Dependent Claim
25 words
A polymer-modified polyol according to claim 1 in which the first polyol is a polyoxyalkylene polyol having a molecular weight of from 1000 to 10,000.
Claim 4
Independent Claim
89 words
A method of forming a polymer-modified polyol in which a polyisocyanate is reacted in the presence of a first polyol which has a molecular weight of at least 1000, an average functionality of more than 2 and a Hydroxyl Number of less than 150, with a second polyol which is either (a) a polyethylene glycol having a molecular weight of up to 600 or (b) a polyol, which is not a polyethylene glycol, and which has a molecular weight of less than 250 and is free from nitrogen atoms.
Claim 5
Independent Claim
89 words
A method of forming a polymer-modified polyol in which a polyisocyanate is reacted in the presence of a first polyol which has a molecular weight of at least 1000, an average functionality of more than 2 and a Hydroxyl Number of less than 150, with a second polyol which is either (a) a polyethylene glycol having a molecular weight of up to 600 or (b) a polyol, which is not a polyethylene glycol, and which has a molecular weight of less than 250 and is free from nitrogen atoms.
Claim 6
Dependent Claim
25 words
A method according to claim 3 in which the polyisocyanate and second polyol are mixed together in a molar ratio of from 0.5:1.0 to 1.5:1.0.
Claim 7
Dependent Claim
40 words
A method according to claim 3 in which the concentration of the reaction product of the polyisocyanate and second polyol in the polymer-modified polyol is between 1 and 80% by weight based on the total weight of the polymer-modified polyol.
Claim 8
Independent Claim
128 words
A method of forming a polymer-modified polyol in which a polyisocyanate is reacted in the presence of a first polyol, which is a polyoxyalkylene polyol having a molecular weight of from 1000 to 10,000 with a second polyol which is either (a) a polyethylene glycol having a molecular weight of up to 600 or (b) a polyol, which is not a polyethylene glycol, and which has a molecular weight of less than 250 and is free from nitrogen atoms, the polyisocyanate and second polyol being mixed together in a molar ratio of from 0.5:1.0 to 1.5:1.0 and the concentration of the reaction product of the polyisocyanate and second polyol in the polymer-modified polyol being between 1 and 80% by weight based on the weight of the polymer-modified polyol.
Claim 9
Independent Claim
128 words
A method of forming a polymer-modified polyol in which a polyisocyanate is reacted in the presence of a first polyol, which is a polyoxyalkylene polyol having a molecular weight of from 1000 to 10,000 with a second polyol which is either (a) a polyethylene glycol having a molecular weight of up to 600 or (b) a polyol, which is not a polyethylene glycol, and which has a molecular weight of less than 250 and is free from nitrogen atoms, the polyisocyanate and second polyol being mixed together in a molar ratio of from 0.5:1.0 to 1.5:1.0 and the concentration of the reaction product of the polyisocyanate and second polyol in the polymer-modified polyol being between 1 and 80% by weight based on the weight of the polymer-modified polyol.
Claim 10
Dependent Claim
111 words
In a method of making a polyurethane product in which a polyisocyanate is reacted with a polyol, the improvement which comprises using as the polyol a polymer-modified polyol comprising a dispersion in a first polyol which has a molecular weight of at least 1000, an average functionality of more than 2, and a Hydroxyl Number of less than 150, of the reaction product of a polyisocyanate and a second polyol which is either (a) a polyethylene glycol having a molecular weight of up to 600 or (b) a polyol, which is not a polyethylene glycol, and which has a molecular weight of less than 250 and is free from nitrogen atoms.
Claim 11
Dependent Claim
111 words
In a method of making a polyurethane product in which a polyisocyanate is reacted with a polyol, the improvement which comprises using as the polyol a polymer-modified polyol comprising a dispersion in a first polyol which has a molecular weight of at least 1000, an average functionality of more than 2, and a Hydroxyl Number of less than 150, of the reaction product of a polyisocyanate and a second polyol which is either (a) a polyethylene glycol having a molecular weight of up to 600 or (b) a polyol, which is not a polyethylene glycol, and which has a molecular weight of less than 250 and is free from nitrogen atoms.
Claim 12
Dependent Claim
16 words
A method according to claim 7 in which the polyurethane product is a flexible polyurethane foam.
Claim 13
Dependent Claim
9 words
Polyurethane products obtained by the method of claim 7.
References Cited (Backward Citations)
US3383351A
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GB1044267A
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GB1501172A
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GB1482213A
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GB1453258A
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GB1571184A
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GB1598967A
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US4332716A
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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) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |