Patent US3907928A successfully refreshed from Google Patents.
US3907928A
Expired / Lapsed
US
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Polyvinyl chloride resin composition
Assignee: JSR Corp
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Filing: 1973-09-14
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Granted: 1975-09-23
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Expires: 1993-09-14
Abstract
Abstract The present invention relates to a polyvinyl chloride resin composition prepared by mixing polyvinyl chloride resin with a graft polymer which is produced by grafting methyl methacrylate, styrene and acrylonitrile to a styrene-butadiene copolymer. More particularly, the present invention relates to a polyvinyl chloride resin composition prepared by mixing polyvinyl chloride resin with a graft polymer and, in the preparation of the latter from styrene-butadiene copolymer methyl methacrylate, styrene and acrylonitrile, the styrene-butadiene copolymer latex is first treated by heating and agitating under a specified condition at least in the presence of a certain amount of methyl methacrylate, and then the remainder of methyl methacrylate, styrene and, acrylonitrile is added in the presence of polymerization initiator until the polymerization reaction is completed. The polyvinyl chloride resin composition can provide molded matters having excellent impact resistance and superior transparency in a wide range of molding conditions, for example, by the blow molding process.
Inventors
- 👤 Hirohide Kumabe
- 👤 Akio Morimoto
- 👤 Yozo Kitagawa
- 👤 Nobuhide Shiraishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:52
CPC Classifications
C; C08; C08F; C08F285/00; C08F279/00; C08F279/02; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L51/00; C08L51/04; Y; Y10; Y10S; Y10S525/00; Y10S525/942
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
193 words
POLYVINYL CHLORIDE RESIN COMPOSITION PREPARED BY MIXING 95 TO 70 PARTS BY WEIGHT OF POLYVINYL CHLORIDE RESIN WITH 5 TO 30 PARTS OF THE GRAFT POLYMER WHICH IS PRODUCED FROM 30 TO 60 PARTS BY WEIGHT OF SOLID RUBBER MATERIAL BASED ON 100 PARTS OF THE GRAFT POLYMER OF STYRENE-BUTADIENE COPOLYMER LATEX, IN WHICH THE COMBINED STYRENE AMOUNTS TO LESS THAN 50% BY WEIGHT MORE THAN 80* BY WEIGHT OF THE COPOLYMER LATEX PARTICLES ARE OF A PARTICLE DIAMETER SMALLER THAN 0.15 U AND 70 TO 40 PARTS BY WEIGHT OF MONOMERS CONSISTING OF 30 TO 70* BY WEIGHT OF METHYL METHACRYLATE, 70 TO 30% BY WEIGHT OF SYRENE AND 0 TO 20% BY WEIGHT OF ACRYLONITRILE, BY GRAFT POLYMERIZATION COMPRISING FIRST MIXING IN THE ABSENCE OF AN ADDED POLYMERIZATION INITIATOR 85 TO 15% BY WEIGHT OF METHYL METHACRYLATE USED FOR THE GRAFT POLYMERIZATION WITH THE COPOLYMER LATEX AND AGITATING THEM FOR 0.5 TO 7 HOURS AT A TEMPERATURE OF 60* TO 95*C AND THEN ADDING THE REMAINDER OF METHYL METHACRYLATE, STYRENE AND ACRYLONITRILE OVER MORE THAN A 2 HOUR PERIOD IN THE PRESENCE OF A POLYMERIZATION INITIATORR UNTIL THE POLYMERIZATION IS COMPLETED.
Claim 2
Dependent Claim
193 words
POLYVINYL CHLORIDE RESIN COMPOSITION PREPARED BY MIXING 95 TO 70 PARTS BY WEIGHT OF POLYVINYL CHLORIDE RESIN WITH 5 TO 30 PARTS OF THE GRAFT POLYMER WHICH IS PRODUCED FROM 30 TO 60 PARTS BY WEIGHT OF SOLID RUBBER MATERIAL BASED ON 100 PARTS OF THE GRAFT POLYMER OF STYRENE-BUTADIENE COPOLYMER LATEX, IN WHICH THE COMBINED STYRENE AMOUNTS TO LESS THAN 50% BY WEIGHT MORE THAN 80* BY WEIGHT OF THE COPOLYMER LATEX PARTICLES ARE OF A PARTICLE DIAMETER SMALLER THAN 0.15 U AND 70 TO 40 PARTS BY WEIGHT OF MONOMERS CONSISTING OF 30 TO 70* BY WEIGHT OF METHYL METHACRYLATE, 70 TO 30% BY WEIGHT OF SYRENE AND 0 TO 20% BY WEIGHT OF ACRYLONITRILE, BY GRAFT POLYMERIZATION COMPRISING FIRST MIXING IN THE ABSENCE OF AN ADDED POLYMERIZATION INITIATOR 85 TO 15% BY WEIGHT OF METHYL METHACRYLATE USED FOR THE GRAFT POLYMERIZATION WITH THE COPOLYMER LATEX AND AGITATING THEM FOR 0.5 TO 7 HOURS AT A TEMPERATURE OF 60* TO 95*C AND THEN ADDING THE REMAINDER OF METHYL METHACRYLATE, STYRENE AND ACRYLONITRILE OVER MORE THAN A 2 HOUR PERIOD IN THE PRESENCE OF A POLYMERIZATION INITIATORR UNTIL THE POLYMERIZATION IS COMPLETED.
Claim 3
Dependent Claim
32 words
Polyvinyl chloride resin composition according to claim 1, wherein combined styrene amounts to 10 to 45% by weight in the styrene-butadiene copolymer that is used as base polymer to the graft polymer.
Claim 4
Dependent Claim
205 words
Polyvinyl chloride resin composition prepared by mixing 95 to 70 parts by weight of polyvinyl chloride resin with 5 to 30 parts by weight of the graft polymer that is produced from 30 to 60 parts by weight of solid rubber material based on 100 parts of the graft polymer of styrenebutadiene copolymer latex, in which combined styrene amounts to less than 50% by weight, and more than 80% by weight of the copolymer latex particles are of the particle diameter smaller than 0.15 Mu , and 70 to 40 parts by weight of monomers consisting of 30 to 70% by weight of methyl methacrylate, 70 to 30% by weight of styrene and 0 to 20% by weight of acrylonitrile, by graft polymerization comprising first mixing in the absence oF an added polymerization initiator 85 to 15% by weight of methyl methacrylate used for the graft polymerization and a fraction or the total quantity of acrylonitrile with the copolymer latex and agitating them for 0.5 to 7 hours at a temperature of 60* to 95*C and then adding the remainder of methyl methylacrylate, styrene and acrylonitrile, over more than a 2 hour period in the presence of a polymerization initiator until the polymerization is complete.
Claim 5
Dependent Claim
205 words
Polyvinyl chloride resin composition prepared by mixing 95 to 70 parts by weight of polyvinyl chloride resin with 5 to 30 parts by weight of the graft polymer that is produced from 30 to 60 parts by weight of solid rubber material based on 100 parts of the graft polymer of styrenebutadiene copolymer latex, in which combined styrene amounts to less than 50% by weight, and more than 80% by weight of the copolymer latex particles are of the particle diameter smaller than 0.15 Mu , and 70 to 40 parts by weight of monomers consisting of 30 to 70% by weight of methyl methacrylate, 70 to 30% by weight of styrene and 0 to 20% by weight of acrylonitrile, by graft polymerization comprising first mixing in the absence oF an added polymerization initiator 85 to 15% by weight of methyl methacrylate used for the graft polymerization and a fraction or the total quantity of acrylonitrile with the copolymer latex and agitating them for 0.5 to 7 hours at a temperature of 60* to 95*C and then adding the remainder of methyl methylacrylate, styrene and acrylonitrile, over more than a 2 hour period in the presence of a polymerization initiator until the polymerization is complete.
References Cited (Backward Citations)
US3018268A
Cited
US3287443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |