Patent US4391944A successfully refreshed from Google Patents.
US4391944A
Expired / Lapsed
US
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Vinyl chloride copolymer and composition containing the same
Assignee: Kanegafuchi Chemical Industry Co Ltd
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Filing: 1981-09-15
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Granted: 1983-07-05
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Expires: 2001-09-15
Abstract
Abstract A copolymer comprising (a) vinyl chloride or a mixture of vinyl chloride and a monomer copolymerizable therewith and (b) 1,2-polybutadiene oligomer and/or epoxidized 1,2-polybutadiene oligomer. The plasticized copolymer can be molded into soft moldings having a low compression set and high tensile and tear strengths. Also, by the incorporation of the copolymer into vinyl chloride homopolymer or copolymers, hard moldings having delustered surface can be obtained without conducting delustering operation.
Inventors
- 👤 Kazumasa Yamane
- 👤 Masahiro Kobayashi
- 👤 Masaniko Takada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:50
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F214/00; C08F214/02; C08F214/04; C08F214/06; C08F291/00; C08F291/06; C08F291/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A composition comprising (A) a copolymer prepared by polymerizing a reaction system comprising a monomeric mixture of (a) vinyl chloride or a mixture of at least 50% by weight vinyl chloride and a monomer copolymerizable therewith and (b) 0.001 to 10 parts by weight per 100 parts by weight of the monomeric component (a) of a compound having the following general formula: ##STR3## wherein X and Y are independently hydrogen, hydroxyl or carboxyl, n is an integer of 2 to 100 and m is 0 or an integer of 1 to 80, the polymerization being carried out employing a free-radical polymerization initiator; and (B) 25 to 200 parts by weight of a plasticizer per 100 parts by weight of said copolymer, the composition giving a molding having a compression set of not more than 50% and a tensile strength of not less than 1.30 kg/mm 2 .
Claim 2
Dependent Claim
147 words
A composition comprising (A) a copolymer prepared by polymerizing a reaction system comprising a monomeric mixture of (a) vinyl chloride or a mixture of at least 50% by weight vinyl chloride and a monomer copolymerizable therewith and (b) 0.001 to 10 parts by weight per 100 parts by weight of the monomeric component (a) of a compound having the following general formula: ##STR3## wherein X and Y are independently hydrogen, hydroxyl or carboxyl, n is an integer of 2 to 100 and m is 0 or an integer of 1 to 80, the polymerization being carried out employing a free-radical polymerization initiator; and (B) 25 to 200 parts by weight of a plasticizer per 100 parts by weight of said copolymer, the composition giving a molding having a compression set of not more than 50% and a tensile strength of not less than 1.30 kg/mm 2 .
References Cited (Backward Citations)
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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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |