Patent US3531699A successfully refreshed from Google Patents.
Patent US3959408A successfully refreshed from Google Patents.
US3959408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl chloride resins blended with two step graft resins
Assignee: Kureha Corp
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Filing: 1974-04-09
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Granted: 1976-05-25
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Expires: 1994-04-09
Abstract
Abstract Vinyl chloride resin composition having excellent impact resistance, weather resistance and processability which comprises a vinyl chloride resin and a multicomponent resin blended therewith, said multicomponent resin being prepared by (1) graft polymerizing acrylonitrile, and a vinyl monomer which is methyl methacrylate and/or styrene, and a cross-linking agent onto cross-linked copolymer rubber obtained by emulsion-polymerizing an alkyl acrylate, butadiene and a cross-linking agent or onto a cross-linked terpolymer rubber obtained by emulsion-polymerizing an alkyl acrylate, butadiene, methyl methacrylate and a cross-linking agent and (2) further graft polymerizing thereonto an alkyl methacrylate and a cross-linking agent. Quantitative limitations are included.
Inventors
- 👤 Haruhiko Yusa
- 👤 Hideyuki Hashizume
- 👤 Masanori Oota
- 👤 Kazuo Takahashi
- 👤 Susumu Chubachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:35
CPC Classifications
C; C08; C08F; C08F285/00; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L51/00; Y; Y10; Y10S; Y10S525/00; Y10S525/902
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
230 words
A method for producing a vinyl chloride resin composition having excellent impact resistance over a wide range of processing conditions, weather resistance, and processability, which comprises blending 95 to 70 parts by weight of a vinyl chloride resin and 5 to 30 parts by weight of a multicomponent resin, said multicomponent resin being a two-step graft polymerizate prepared by (1 ) graft-polymerizing 45 to 10 parts by weight of a monomer mixture comprising 10 to 50% by weight of acrylonitrile and 50 to 90% by weight of a member selected from the group consisting of methyl methacrylate, styrene, and mixtures of methylmethacrylate and styrene, containing 0.01 to 3% by weight of a cross-linking agent copolymerizable therewith onto a latex containing 50 to 80 parts by weight of a cross-linked rubber copolymer obtained by emulsion-polymerization of a monomer mixture comprising 40 to 95% by weight of an alkyl acrylate having from 2 to 12 carbon atoms in the alkyl radical, 5 to 40% by weight of butadiene, 0 to 30% by weight of methyl methacrylate and 0.01 to 3% by weight of a cross-linking agent copolymerizable therewith and then (2) graft-polymerizing 5 to 25 parts by weight of an alkyl methacrylate having from 1 to 4 carbon atoms in the alkyl radical containing 0.01 to 3% by weight of a cross-linking agent copolymerizable therewith onto the product of the first step.
Claim 2
Independent Claim
230 words
A method for producing a vinyl chloride resin composition having excellent impact resistance over a wide range of processing conditions, weather resistance, and processability, which comprises blending 95 to 70 parts by weight of a vinyl chloride resin and 5 to 30 parts by weight of a multicomponent resin, said multicomponent resin being a two-step graft polymerizate prepared by (1 ) graft-polymerizing 45 to 10 parts by weight of a monomer mixture comprising 10 to 50% by weight of acrylonitrile and 50 to 90% by weight of a member selected from the group consisting of methyl methacrylate, styrene, and mixtures of methylmethacrylate and styrene, containing 0.01 to 3% by weight of a cross-linking agent copolymerizable therewith onto a latex containing 50 to 80 parts by weight of a cross-linked rubber copolymer obtained by emulsion-polymerization of a monomer mixture comprising 40 to 95% by weight of an alkyl acrylate having from 2 to 12 carbon atoms in the alkyl radical, 5 to 40% by weight of butadiene, 0 to 30% by weight of methyl methacrylate and 0.01 to 3% by weight of a cross-linking agent copolymerizable therewith and then (2) graft-polymerizing 5 to 25 parts by weight of an alkyl methacrylate having from 1 to 4 carbon atoms in the alkyl radical containing 0.01 to 3% by weight of a cross-linking agent copolymerizable therewith onto the product of the first step.
Claim 3
Dependent Claim
41 words
A method for producing a vinyl chloride resin composition as claimed in claim 1, in which said composition comprises 95 to 80 parts by weight of said vinyl chloride resin and 5 to 20 parts by weight of said multicomponent resin.
Claim 4
Dependent Claim
183 words
A method for producing a vinyl chloride resin composition as claimed in claim 1, in which said multicomponent resin is obtained by a two-step graft polymerization, which comprises (1) graft-polymerizing 10 to 45 parts by weight of a monomer mixture comprising 10 to 50% by weight of acrylonitrile, 90 to 50% by weight of methyl methacrylate and styrene and 0.01 to 3% by weight of a cross-linking agent copolymerizable therewith onto a latex containing 50 to 80 parts by weight of a cross-linked rubber copolymer obtained by emulsion-polymerization of a monomer mixture comprising 40 to 95% by weight of an alkyl acrylate having 2 to 0.1 carbon atoms in the alkyl radical, 5 to 40% by weight of butadiene, 0.1 to 30% by weight of methyl methacrylate and 0.01 to 3% by weight of a cross-linking agent copolymerizable therewith and then (2) graft-polymerizing 5 to 25 parts by weight of an alkyl methacrylate having from 1 to 4 carbon atoms in the alkyl radical containing 0.01 to 3% by weight of a cross-linking agent copolymerizable therewith onto the product of the first step.
Claim 5
Dependent Claim
188 words
A method for producing a vinyl chloride resin composition as claimed in claim 1, in which said multicomponent resin is obtained by a two-step graft polymerization, which comprises (1) graft-polymerizing 10 to 45 parts by weight of a monomeric mixture comprising 10 to 50% by weight of acrylonitrile and 90 to 50% by weight of a member selected from the group consisting of methylmethacrylate, styrene and mixtures of methylmethacrylate and styrene and 0.01 to 3% by weight of a cross-linking agent copolymerizable therewith onto a latex containing 50 to 80 parts by weight of a cross-linked rubber copolymer obtained by emulsion-polymerization of a monomer mixture comprising 70 to 95% by weight of an alkyl acrylate having 2 to 12 carbon atoms in the alkyl radical, 5 to 30% by weight of butadiene, and 0.01 to 3% by weight of a cross-linking agent copolymerizable therewith and then (2) graft-polymerizing 5 to 25 parts by weight of an alkyl methacrylate having from 1 to 4 carbon atoms in the alkyl radical containing 0.01 to 3% by weight of a cross-linking agent copolymerizable therewith onto the product of the first step.
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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) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |