Patent US4668740A successfully refreshed from Google Patents.
US4668740A
Expired / Lapsed
US
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Vinyl chloride polymer resin composition
Assignee: Mitsubishi Chemical Corp
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Filing: 1985-04-15
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Granted: 1987-05-26
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Expires: 2005-04-15
Abstract
Abstract A vinyl chloride polymer resin composition having excellent processability and flowability is comprised of (A) 100 weight parts of a vinyl chloride polymer composition comprising 5 to 100 weight % of a vinyl chloride polymer having an average polymerization degree of 300 to 700 and 95 to 0 weight % of a vinyl chloride polymer having an average molecular weight higher than 700, and (B) 0.1 to 30 weight parts of a methyl methacrylate polymer comprised of at least 40 weight % of methyl methacrylate and having a reduced viscosity (ηsp/C) of 0.1 to 2 l/g.
Inventors
- 👤 Kenji Okano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:10
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L33/00; C08L33/04; C08L33/06; C08L33/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
A vinyl chloride polymer resin composition having excellent processability and flowability, which comprises (a) 100 parts by weight of a vinyl chloride polymer composition selected from the group consisting of a homopolymer of vinyl chloride having an average polymerization degree of 400 to 500, and a polymer mixture consisting of 80 to 20% by weight of a homopolymer of vinyl chloride having an average polymerization degree of 400 to 500 and 20 to 80% by weight of a homopolymer of vinyl chloride having an average polymerization degree of 800 to 1000, and (b) 0.1 to 30 parts by weight of a methyl methacrylate polymer, exclusive of the graft-type methacrylate polymers, comprised of at least 40% by weight of methyl methacrylate units and having a reduced viscosity (ηsp/C) of 0.1 to 2 l/g as measured at 25° C. with respect to a solution of 0.1 g of the polymer dissolved in 100 ml of chloroform.
Claim 2
Dependent Claim
154 words
A vinyl chloride polymer resin composition having excellent processability and flowability, which comprises (a) 100 parts by weight of a vinyl chloride polymer composition selected from the group consisting of a homopolymer of vinyl chloride having an average polymerization degree of 400 to 500, and a polymer mixture consisting of 80 to 20% by weight of a homopolymer of vinyl chloride having an average polymerization degree of 400 to 500 and 20 to 80% by weight of a homopolymer of vinyl chloride having an average polymerization degree of 800 to 1000, and (b) 0.1 to 30 parts by weight of a methyl methacrylate polymer, exclusive of the graft-type methacrylate polymers, comprised of at least 40% by weight of methyl methacrylate units and having a reduced viscosity (ηsp/C) of 0.1 to 2 l/g as measured at 25° C. with respect to a solution of 0.1 g of the polymer dissolved in 100 ml of chloroform.
Claim 3
Dependent Claim
33 words
A vinyl chloride polymer resin composition according to claim 1 wherein the vinyl chloride polymer composition (A) is comprised of a vinyl chloride homopolymer having an average polymerization degree of 400 to 500.
Claim 4
Dependent Claim
59 words
A vinyl chloride polymer resin composition according to claim 1 wherein the vinyl chloride polymer composition (A) is comprised of 20 to 80% by weight of a vinyl chloride homopolymer having an average polymerization degree of 400 to 500 and 80 to 20% by weight of a vinyl chloride homopolymer having an average polymerization degree of 800 to 1000.
Claim 5
Dependent Claim
42 words
A vinyl chloride polymer resin composition according to claim 1 wherein the methyl methacrylate polymer is comprised of 70 to 95% by weight of methyl methacrylate units and 5 to 30% by weight of units derived from ethyl acrylate or butyl acrylate.
Claim 6
Dependent Claim
25 words
A vinyl chloride polymer resin composition according to claim 1 wherein the methyl methacrylate polymer has a reduced viscosity (ηsp/C) of 0.3 to 0.4 l/g.
Claim 7
Dependent Claim
37 words
A vinyl chloride polymer resin composition according to claim 1 wherein the amount of the methyl methacrylate polymer is 1 to 10% by weight based on 100 parts by weight of the vinyl chloride polymer composition (A).
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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) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |