Patent US3644249A successfully refreshed from Google Patents.
US3644249A
Expired / Lapsed
US
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Polyvinyl chloride resin composition having excellent transparency, surface gloss and impact strength
Assignee: Mitsubishi Chemical Corp
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Filing: 1969-07-08
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Granted: 1972-02-22
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Expires: 1989-07-08
Abstract
Abstract PVC resin compositions of improved transparency, surface gloss and impact resistance are obtained by mixing the PVC with a graft polymer. The graft is produced by grafting first methyl methacrylate and then styrene onto an elastomer of butadiene, nbutyl acrylate, and styrene in the proportions shown in the accompanying ternary constitutional diagram. When the monomer(s) used in preparing the aforesaid graft polymer have a small quantity of C10 to C18 saturated fatty acid dissolved therein, the PVC compositions prepared from the graft polymer show further improvements in their properties.
Inventors
- 👤 Fumio Ide
- 👤 Kenji Okano
- 👤 Seiji Deguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:17
CPC Classifications
C; C08; C08F; C08F285/00; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L51/00; C08L51/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
38 words
The resin composition as claImed in claim 1 wherein said graft polymer is prepared by polymerizing methyl methacrylate and styrene while adding continuously at least one of the monomers to the elastomer over an at least 30-minute period.
Claim 2
Dependent Claim
48 words
The resin composition as claimed in claim 1 wherein at least one of methyl methacrylate and styrene to be polymerized in the presence of elastomer (E) has uniformly dissolved therein 0.5-5 percent by weight based on said graft polymer of a saturated fatty acid having 10-18 carbon atoms.
Claim 3
Dependent Claim
33 words
The resin composition as claimed in claim 1 wherein said elastomer (E) is a terpolymer comprising 55-60 percent by weight 1,3-butadiene, 8-13 percent by weight n-butyl acrylate, and 30-38 percent by weight styrene.
References Cited (Backward Citations)
US3312756A
Cited
US3288886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |