US4469845A
Expired / Lapsed
US
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Blends of a rubber-modified polyvinyl chloride resin and a polymer of a vinyl aromatic monomer and unsaturated dicarboxylic acid anhydride monomer
Assignee: Individual
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Filing: 1983-05-16
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Granted: 1984-09-04
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Expires: 2003-05-16
Abstract
Abstract A polyblend of (a) 80-20 percent of a rubber-modified vinyl chloride resin, prepared by polymerization of vinyl chloride in the presence of 2 to 20 percent of a rubber, and (b) 20-80 percent of copolymers or terpolymers of a vinyl aromatic monomer, such as styrene, an unsaturated dicarboxylic acid anhydride, such as maleic anhydride, and an optional third monomer such as methyl methacrylate or acrylonitrile, and (c) optionally 0-15 percent of an ungrafted rubber such as a block copolymer of 1,3-butadiene and styrene; and/or 0-35 percent of a graft copolymer of rubber, styrene, and methyl methacrylate or acrylonitrile. The polyblends have high heat distortion temperatures, high impact strength, good processability, and can be made in a substantially transparent form.
Inventors
- 👤 Kenneth W. Doak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:04
CPC Classifications
C; C08; C08L; C08L35/00; C08L35/06; C08L51/00; C08L51/06
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
166 words
A polyblend composition comprising: (a) 80-20 percent by weight of a rubber-modified vinyl chloride resin, containing 0-20 percent, based on total monomers, of a copolymerizable, ethylenically unsaturated comonomer, selected from the group consisting of ethylene, propylene, an alpha-olefin containing 4-8 carbon atoms, vinyl acetate, vinylidene chloride, alkyl acrylate, acrylic acid, methacrylic acid, and methyl methacrylate, said resin prepared by polymerization of vinyl chloride monomer and the comonomer, in the presence of 2-20 percent, based on the weight of the resin, of a rubber to form a discretely dispersed graft copolymer, and wherein a major amount of the polymerized vinyl chloride homopolymer or copolymer present in said resin is ungrafted to the rubber; and (b) 20-80 percent by weight of a polymer consisting essentially of a vinyl aromatic monomer and an unsaturated dicarboxylic acid anhydride monomer in weight ratios of 95:5 to 70:30, and 0-25 percent, based on total monomers, of a copolymerizable, ethylenically unsaturated termonomer, selected from the group consisting of methyl methacrylate, acrylonitrile, and methacrylonitrile.
Claim 2
Dependent Claim
166 words
A polyblend composition comprising: (a) 80-20 percent by weight of a rubber-modified vinyl chloride resin, containing 0-20 percent, based on total monomers, of a copolymerizable, ethylenically unsaturated comonomer, selected from the group consisting of ethylene, propylene, an alpha-olefin containing 4-8 carbon atoms, vinyl acetate, vinylidene chloride, alkyl acrylate, acrylic acid, methacrylic acid, and methyl methacrylate, said resin prepared by polymerization of vinyl chloride monomer and the comonomer, in the presence of 2-20 percent, based on the weight of the resin, of a rubber to form a discretely dispersed graft copolymer, and wherein a major amount of the polymerized vinyl chloride homopolymer or copolymer present in said resin is ungrafted to the rubber; and (b) 20-80 percent by weight of a polymer consisting essentially of a vinyl aromatic monomer and an unsaturated dicarboxylic acid anhydride monomer in weight ratios of 95:5 to 70:30, and 0-25 percent, based on total monomers, of a copolymerizable, ethylenically unsaturated termonomer, selected from the group consisting of methyl methacrylate, acrylonitrile, and methacrylonitrile.
Claim 3
Dependent Claim
66 words
The polyblend composition of claim 1 wherein there is added up to 15 percent by weight, based on the weight of the polyblend, a block copolymer selected from the group consisting of an ungrafted block copolymer rubber containing 20-50 percent by weight of a vinyl aromatic monomer and 80-50 percent by weight of 1,3-butadiene, and hydrogenated such block copolymers, in the form of discretely dispersed particles.
Claim 4
Dependent Claim
28 words
The polyblend composition of claim 2 in which the vinyl aromatic monomer in the ungrafted block copolymer rubber is selected from the group consisting of styrene and p-methyl-styrene.
Claim 5
Dependent Claim
108 words
The polyblend composition of claim 1 wherein there is added up to 35 percent by weight, based on the weight of the polyblend, of a graft copolymer selected from the group consisting of (a) a copolymer of 30-80 percent by weight of methyl methacrylate and 70-20 percent by weight of a vinyl aromatic monomer, (b) a copolymer of 20-40 percent acrylonitrile and 80-60 percent by weight of a vinyl aromatic monomer, and (c) a copolymer of 20-40 percent methacrylonitrile and 80-60 percent by weight of a vinyl aromatic monomer; said copolymer being grafted onto 10-60 percent based on the weight of the graft copolymer, of a substrate rubber.
Claim 6
Dependent Claim
53 words
The polyblend composition of claim 4 wherein there is added up to 15 percent by weight, based on the weight of the polyblend, of an ungrafted block copolymer rubber containing 20-50 percent by weight of a vinyl aromatic monomer and 80-50 percent by weight of 1,3-butadiene, in the form of discretely dispersed particles.
Claim 7
Dependent Claim
28 words
The polyblend composition of claim 5 in which the vinyl aromatic monomer in the ungrafted block copolymer rubber is selected from the group consisting of styrene and p-methylstyrene.
Claim 8
Dependent Claim
47 words
The polyblend of claim 4 in which the substrate rubber is selected from the group consisting of polybutadiene and a block copolymer rubber containing 90-45 percent of butadiene and 10-55 percent by weight of a vinyl aromatic monomer selected from the group consisting of styrene and p-methylstyrene.
Claim 9
Dependent Claim
36 words
The polyblend composition of claim 1 wherein said rubber-modified vinyl chloride resin contains up to 10 percent by weight of a copolymerizable ethylenically unsaturated comonomer selected from the group consisting of vinyl acetate, ethylene and propylene.
Claim 10
Dependent Claim
76 words
The polyblend composition of claim 1 wherein the rubber used in the preparation of the rubber-modified vinyl chloride resin is selected from the 8 group consisting of a copolymer of ethylene and a copolymerizable comonomer selected from the group consisting of vinyl acetate, ethyl acrylate, methyl acrylate, propylene and butene-1; a terpolymer of ethylene, propylene and a diene monomer; chlorinated polyethylene; a butyl acrylate-based rubber; and a block copolymer of a vinyl aromatic monomer and butadiene.
Claim 11
Dependent Claim
35 words
The polyblend composition of claim 9 wherein said vinyl aromatic monomer, in said polymer, is selected from the group consisting of styrene and p-methylstyrene, and wherein said unsaturated dicarboxylic acid anhydride monomer is maleic anhydride.
Claim 12
Dependent Claim
20 words
The polyblend composition of claim 10 wherein said maleic anhydride is present in an amount of 10-25 percent by weight.
Claim 13
Dependent Claim
21 words
The polyblend of claim 11 wherein said polymer contains up to 25 percent by weight based on monomers of methyl methacrylate.
Claim 14
Dependent Claim
38 words
The polyblend composition according to claim 10 wherein said vinyl aromatic monomer, in said polymer, is selected from the group consisting of styrene and p-methylstyrene, and contains up to 20 percent by weight based on monomers of acrylonitrile.
Claim 15
Dependent Claim
42 words
The polyblend composition according to claim 4 in which the graft copolymer is a copolymer of 30-80 percent by weight of methyl methacrylate and 70-20 percent by weight of a vinyl aromatic monomer, selected from the group consisting of styrene and p-methylstyrene.
Claim 16
Dependent Claim
42 words
The polyblend composition according to claim 1 wherein said vinyl aromatic monomer, in said polymer, is selected from the group consisting of chlorostyrene, and a mixture of dichlorostyrene with styrene or p-methylstyrene, and wherein said unsaturated dicarboxylic acid anhydride is maleic anhydride.
Claim 17
Dependent Claim
41 words
The polyblend composition according to claim 4 wherein said graft copolymer contains an unsaturated nitrile selected from the group consisting of acrylonitrile and methacrylonitrile, and at least one vinyl aromatic monomer selected from the group consisting of styrene, p-methylstyrene, and alphamethylstyrene.
Claim 18
Dependent Claim
35 words
The polyblend composition according to claim 16 which contains 10-35 percent based on weight of the composition, of said graft copolymer, and the ratio of rubber-modified vinyl chloride resin to polymer is 67:33 to 40:60.
Claim 19
Dependent Claim
38 words
The polyblend composition according to claim 17 wherein said acrylonitrile in said polymer is present in an amount up to 20 percent; and said methyl methacrylate in said polymer, is present in an amount up to 25 percent.
Claim 20
Dependent Claim
53 words
The polyblend composition according to claim 17 wherein the rubber in said rubber-modified vinyl chloride resin is selected from the group consisting of a terpolymer of ethylene, propylene, and a diene termonomer; and a copolymer of ethylene and a comonomer selected from the group consisting of vinyl acetate, ethyl acrylate and methyl acrylate.
Claim 21
Dependent Claim
48 words
The polyblend composition of claim 14 wherein said polymer contains up to 25 percent by weight, based on monomers, of methyl methacrylate and 15-25 percent by weight of maleic anhydride, and the vinyl aromatic monomer in said polymer is selected from the group consisting of styrene and p-methylstyrene.
Claim 22
Dependent Claim
58 words
The polyblend composition according to claim 20 wherein the rubber used in the preparation of the rubbermodified vinyl chloride resin is selected from the group consisting of a copolymer of ethylene and an ethylenically unsaturated comonomer selected from the group consisting of methyl acrylate, ethyl acrylate, and vinyl acetate; and a terpolymer of ethylene, propylene, and a termonomer.
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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) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |