US4242249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer/polyols via non-aqueous dispersion stabilizers
Assignee: Lyondell Chemical Technology LP
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Filing: 1979-04-03
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Granted: 1980-12-30
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Expires: 1999-04-03
Abstract
Abstract This invention relates to polymer/polyols prepared from an ethylenically unsaturated monomer or a mixture of such monomers and characterized by the utilization, in the preparation thereof, of certain preformed stabilizers tailored to the monomer system employed, a method of preparing such polymer/polyols, and to the preformed stabilizers themselves. In general, the stabilizer, compatible with the polyol portion of the polymer/polyol, comprises a copolymer of an anchor portion consisting of an ethylenically unsaturated monomer or mixture of such monomers and a solvatable portion consisting of a propylene oxide polymer having a number average molecular weight of at least 800. The resulting polymer/polyols are stable, fluid, essentially free from scrap and seeds as produced and contain relatively small polymer particles. In accordance with one aspect of this invention, the polymer particles are essentially spherical in shape.
Inventors
- 👤 Russell Van Cleve
- 👤 George H. Armstrong
- 👤 Donald W. Simroth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:22
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/06; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08G18/632; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06; Y10S516/07
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
210 words
A process for producing a fluid, stable polymer/polyol composition which comprises: adding a preformed stabilizer, which is a graft or addition copolymer comprising (a) an anchor portion consisting essentially of a polymer or an ethylenically unsaturated monomer of a mixture of such monomers chemically bonded to (b) a solvatable portion consisting of a propylene oxide polymer having a number average molecular weight of at least about 800, said performed stabilizer having a viscosity in excess of 40,000 centipoises at 25° C., to a normally liquid polypropylene oxide polyol having a number average molecular weight of at least about 400 and a hydroxyl number of from about 20 to about 280, said preformed stabilizer being present in the polyol in an amount sufficient to stabilize a polymer particle dispersed therein against phase separation, in order to provide a homogeneous mixture of said preformed stabilizer and said polyol, and subsequently polymerizing a reaction mixture comprising (I) said homogeneous mixture of preformed stabilizer and polyol, (II) from about 10 to about 40 weight percent of an ethylenically unsaturated monomer or a mixture of such monomers, said weight percent being based on the total weight of the monomer or monomer mixture and the polyol in said homogeneous mixture, and (III) a free radical catalyst.
Claim 2
Dependent Claim
210 words
A process for producing a fluid, stable polymer/polyol composition which comprises: adding a preformed stabilizer, which is a graft or addition copolymer comprising (a) an anchor portion consisting essentially of a polymer or an ethylenically unsaturated monomer of a mixture of such monomers chemically bonded to (b) a solvatable portion consisting of a propylene oxide polymer having a number average molecular weight of at least about 800, said performed stabilizer having a viscosity in excess of 40,000 centipoises at 25° C., to a normally liquid polypropylene oxide polyol having a number average molecular weight of at least about 400 and a hydroxyl number of from about 20 to about 280, said preformed stabilizer being present in the polyol in an amount sufficient to stabilize a polymer particle dispersed therein against phase separation, in order to provide a homogeneous mixture of said preformed stabilizer and said polyol, and subsequently polymerizing a reaction mixture comprising (I) said homogeneous mixture of preformed stabilizer and polyol, (II) from about 10 to about 40 weight percent of an ethylenically unsaturated monomer or a mixture of such monomers, said weight percent being based on the total weight of the monomer or monomer mixture and the polyol in said homogeneous mixture, and (III) a free radical catalyst.
Claim 3
Dependent Claim
39 words
The process of claim 1 wherein said anchor portion consists of a copolymer of a first monomer that forms a polymer insoluble in the first monomer and a second monomer that forms a polymer soluble in the second monomer.
Claim 4
Dependent Claim
11 words
The process of claim 2 wherein said first monomer is acrylonitrile.
Claim 5
Dependent Claim
27 words
The process of claim 2 wherein the weight ratio of the first monomer to the second monomer is in the range of from about 30/70 to 80/20.
Claim 6
Dependent Claim
32 words
The process of claim 4 wherein the first monomer is acrylonitrile and the second monomer is a member selected from the group consisting of styrene, ethyl acrylate, vinyl acetate, and methyl methacrylate.
Claim 7
Dependent Claim
11 words
The process of claim 5 wherein the second monomer is styrene.
Claim 8
Dependent Claim
80 words
The process of claim 1 wherein (1) is a mixture of monomers comprising a first monomer that forms a polymer soluble in the first monomer and a second monomer that forms a polymer insoluble in the second monomer and wherein (a) is a polymer of a mixture of the first monomer and second, the ratio of the first monomer to the second monomer in (1) being different than the ratio of the first monomer to the second monomer in (a).
Claim 9
Dependent Claim
20 words
The process of claim 1 wherein the solvatable portion has a number average molecular weight of at least about 1800.
Claim 10
Dependent Claim
20 words
The process of claim 1 wherein the solvatable portion has a number average molecular weight of at least about 2600.
Claim 11
Dependent Claim
28 words
The process of claim 1 wherein the ethylenically unsaturated monomer is a member selected from the group consisting of acrylonitrile, styrene, ethyl acrylate, vinyl acetate, and methyl methacrylate.
Claim 12
Dependent Claim
26 words
The process of claim 1 wherein the polypropylene oxide polymer has ethylenic terminal unsaturation, on the average, at no more than one end of the polymer.
Claim 13
Dependent Claim
35 words
The process of claim 1 wherein the solvatable portion is a reaction product of the polypropylene oxide polymer and an equimolar to semimolar amount of an organic compound containing a group which enhances hydrogen abstraction.
Claim 14
Dependent Claim
12 words
The process of claim 12 wherein said organic compound is toluene diisocyanate.
Claim 15
Dependent Claim
28 words
The process of claim 1 wherein the stabilizer is present in an amount of at least about 1 percent, based on the total weight of the polymer/polyol composition.
Claim 16
Dependent Claim
29 words
The process of claim 1 wherein the stabilizer is present in an amount of from about 1 to 6 percent, based upon the total weight of the polymer/polyol composition.
Claim 17
Dependent Claim
55 words
The process of claim 1 wherein the mixture of monomers in the reaction mixture consists of acrylonitrile and styrene in the ratio of from about 30/70 to 60/40 and the anchor portion is formed from a mixture of acrylonitrile and styrene in the ratio of from about 30/70 to 50/50, the ratios being by weight.
Claim 18
Dependent Claim
16 words
The process of claim 16 wherein the anchor portion ratio is from about 30/70 to 40/60.
Claim 19
Dependent Claim
55 words
The process of claim 1 wherein the mixture of monomers in the reaction mixture consists of acrylonitrile and styrene in the ratio of from about 0/100 to 30/70 and the anchor portion is formed from a mixture of acrylonitrile and styrene in the ratio of from about 40/60 to 50/50, the ratios being by weight.
Claim 20
Dependent Claim
56 words
The process of claim 1 wherein the mixture of monomers in the reaction mixture consists of acrylonitrile and styrene in the ratio of from about 60/40 to 100/0 and the anchor portion is formed from a mixture of acrylonitrile and styrene in the ratio of from about 50/50 to about 80/20, the ratios being by weight.
Claim 21
Dependent Claim
27 words
The process of claim 19 wherein the mixture of monomers in the reaction mixture consists of acrylonitrile and styrene in the ratio of from 60/40 to 80/20.
Claim 22
Dependent Claim
49 words
The process of claim 1 wherein the mixture of monomers in the reaction mixture consists of acrylonitrile and styrene in the ratio of about 20/80 and the anchor portion is formed from a mixture of acrylonitrile and styrene in the ratio of about 50/50, the ratios being by weight.
Claim 23
Dependent Claim
49 words
The process of claim 1 wherein the mixture of monomers in the reaction mixture consists of acrylonitrile and styrene in the ratio of about 30/70 and the anchor portion is formed from a mixture of acrylonitrile and styrene in the ratio of about 50/50, the ratios being by weight.
Claim 24
Dependent Claim
49 words
The process of claim 1 wherein the mixture of monomers in the reaction mixture consists of acrylonitrile and styrene in the ratio of about 40/60 and the anchor portion is formed from a mixture of acrylonitrile and styrene in the ratio of about 30/70, the ratios being by weight.
Claim 25
Dependent Claim
49 words
The process of claim 1 wherein the mixture of monomers in the reaction mixture consists of acrylonitrile and styrene in the ratio of about 50/50 and the anchor portion is formed from a mixture of acrylonitrile and styrene in the ratio of about 30/70, the ratios being by weight.
Claim 26
Dependent Claim
35 words
The process of claim 1 wherein (1) comprises a mixture of acrylonitrile and a comonomer in which the comonomer is present in an amount of at least about 70 percent by weight of the mixture.
Claim 27
Dependent Claim
30 words
The process of claim 1 wherein the ethylenically unsaturated monomer or a mixture of such monomers in (1) is present in an amount of at least about 30 weight percent.
Claim 28
Dependent Claim
23 words
The process of claim 1 wherein said normally liquid polypropylene oxide polyol has a number average molecular weight of less than about 2000.
Claim 29
Dependent Claim
13 words
The process of claim 1 wherein said polypropylene oxide polymer is a polyol.
Claim 30
Dependent Claim
10 words
The polymer/polyol composition produced by the process of claim 1.
Claim 31
Dependent Claim
10 words
The polymer/polyol composition produced by the process of claim 2.
Claim 32
Dependent Claim
10 words
The polymer/polyol composition produced by the process of claim 5.
Claim 33
Dependent Claim
10 words
The polymer/polyol composition produced by the process of claim 10.
Claim 34
Dependent Claim
10 words
The polymer/polyol composition produced by the process of claim 16.
Claim 35
Dependent Claim
10 words
The polymer/polyol composition produced by the process of claim 18.
Claim 36
Dependent Claim
10 words
The polymer/polyol composition produced by the process of claim 19.
Claim 37
Dependent Claim
11 words
The polymer/polyol composition produced by the the process of claim 25.
Claim 38
Dependent Claim
10 words
The polymer/polyol composition produced by the process of claim 26.
Claim 39
Dependent Claim
10 words
The polymer/polyol composition produced by the process of claim 27.
Claim 40
Dependent Claim
10 words
The polymer/polyol composition produced by the process of claim 28.
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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) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |