US4198488A
Expired / Lapsed
US
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Polymer-polyols and polyurethanes based thereon
Assignee: Lyondell Chemical Technology LP
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Filing: 1978-06-26
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Granted: 1980-04-15
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Expires: 1998-06-26
Abstract
Abstract Fluid, stable polymer-polyols are provided which consist of an organic polyol medium and an interpolymer of a minor amount of polymerized ethylenically unsaturated dicarboxylic acid anhydride, such as maleic acid anhydride, and a major amount of at least one different polymerized ethylenically unsaturated monomer, the interpolymer being in the form of particles that are stably dispersed in the polyol. Polyurethane foams produced from these polymer/polyols display improved load bearing and compression set when compared with polymer/polyols produced in a similar manner without the ethylenically unsaturated dicarboxylic acid anhydride; elastomers so produced have improved tensile modulus and tear properties.
Inventors
- 👤 Kenneth Drake
- 👤 Kenneth L. Hoy
- 👤 Carl G. Seefried, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:02
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08G18/638; C08F; C08F283/00; C08F283/06; C08F291/00; C08F291/06; C08F291/08; C08G18/4009; C08G18/4072
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
98 words
A fluid, stable polymer/polyol which comprises: (1) from about 60 to about 90 weight percent of an organic polyol medium consisting essentially of at least one normally liquid polyol and (2) from about 10 to about 40 weight percent of an interpolymer of (a) a minor amount of polymerized ethylenically unsaturated dicarboxylic acid anhydride and (b) a major amount of at least one different polymerized ethylenically unsaturated monomer, said interpolymer being in the form of particles that are stably dispersed in the polyol and said weight percents being based on the total weight of the polymer and polyol.
Claim 2
Dependent Claim
98 words
A fluid, stable polymer/polyol which comprises: (1) from about 60 to about 90 weight percent of an organic polyol medium consisting essentially of at least one normally liquid polyol and (2) from about 10 to about 40 weight percent of an interpolymer of (a) a minor amount of polymerized ethylenically unsaturated dicarboxylic acid anhydride and (b) a major amount of at least one different polymerized ethylenically unsaturated monomer, said interpolymer being in the form of particles that are stably dispersed in the polyol and said weight percents being based on the total weight of the polymer and polyol.
Claim 3
Dependent Claim
35 words
The polymer/polyol of claim 1 wherein said polymerized ethylenically unsaturated dicarboxylic acid anhydride is present in an amount of from about 0.5 to about 20 weight percent based upon the total weight of the interpolymer.
Claim 4
Dependent Claim
27 words
The polymer/polyol of claim 2 wherein said polymerized ethylenically unsaturated dicarboxylic acid anhydride is present in an amount of from about 0.5 to about 10 weight percent.
Claim 5
Dependent Claim
27 words
The polymer/polyol of claim 2 wherein said polymerized ethylenically unsaturated dicarboxylic acid anhydride is present in an amount of from about 2.5 to about 6 weight percent.
Claim 6
Dependent Claim
16 words
The polymer/polyol of claim 1 wherein said ethylenically unsaturated dicarboxylic acid anhydride is maleic acid anhydride.
Claim 7
Dependent Claim
17 words
The polymer/polyol of claim 1 wherein said different polymerized ethylenically unsaturated monomer consists of acrylonitrile and styrene.
Claim 8
Dependent Claim
15 words
The polymer/polyol of claim 1 wherein said normally liquid polyol consists of a poly(oxypropylene) polyol.
Claim 9
Dependent Claim
20 words
The polymer/polyol of claim 1 wherein said polymer/polyol contains a seed level of less than about 20 mg/100 g polymer/polyol.
Claim 10
Dependent Claim
17 words
The polymer/polyol of claim 8 wherein the seed level is less than about 5 mg/100 g polymer/polyol.
Claim 11
Dependent Claim
104 words
A process for producing a fluid, stable polymer/polyol which comprises polymerizing, in the presence of a free radical catalyst, (1) from about 10 to about 40 weight percent of a monomer mixture of (a) a minor amount of an ethylenically unsaturated dicarboxylic acid anhydride and (b) a major amount of at least one different ethylenically unsaturated monomer, dispersed in (2) from about 60 to about 90 weight percent of an organic polyol medium consisting essentially of at least one normally liquid polyol, said weight percents of the monomer mixture and polyol medium being based on the total weight of the monomers and polyol medium.
Claim 12
Dependent Claim
104 words
A process for producing a fluid, stable polymer/polyol which comprises polymerizing, in the presence of a free radical catalyst, (1) from about 10 to about 40 weight percent of a monomer mixture of (a) a minor amount of an ethylenically unsaturated dicarboxylic acid anhydride and (b) a major amount of at least one different ethylenically unsaturated monomer, dispersed in (2) from about 60 to about 90 weight percent of an organic polyol medium consisting essentially of at least one normally liquid polyol, said weight percents of the monomer mixture and polyol medium being based on the total weight of the monomers and polyol medium.
Claim 13
Dependent Claim
38 words
The process of claim 10 wherein said ethylenically unsaturated dicarboxylic acid anhydride is present in an amount of from about 0.5 to about 20 weight percent, said weight being based on the total weight of said monomer mixture.
Claim 14
Dependent Claim
26 words
The process of claim 11 wherein said ethylenically unsaturated dicarboxylic acid anhydride is present in an amount of from about 0.5 to about 10 weight percent.
Claim 15
Dependent Claim
26 words
The process of claim 11 wherein said ethylenically unsaturated dicarboxylic acid anhydride is present in an amount of from about 2.5 to about 6 weight percent.
Claim 16
Dependent Claim
15 words
The process of claim 10 wherein said ethylenically unsaturated dicarboxylic acid anhydride is maleic anhydride.
Claim 17
Dependent Claim
16 words
The process of claim 10 wherein said different ethylenically unsaturated monomer consists of acrylonitrile and styrene.
Claim 18
Dependent Claim
44 words
A method for producing an elastomeric polyurethane which comprises reacting a mixture comprising: (a) a polymer/polyol composition as claimed in claim 1, and (b) an organic polyisocyanate in contact with (c) a catalyst for the reaction of (a) and (b) to produce a polyurethane.
Claim 19
Dependent Claim
10 words
The elastomeric polyurethane produced by the method of claim 16.
Claim 20
Dependent Claim
45 words
A method for producing a polyurethane foam which comprises reacting: (a) a polymer/polyol as claimed in claim 1, and (b) an organic polyisocyanate in contact with (c) a catalyst for the reaction of (a) and (b), (d) a blowing agent, and (e) a foam stabilizer.
Claim 21
Dependent Claim
10 words
The polyurethane foam produced by the method of claim 18.
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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) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |