US3915922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl chloride composition
Assignee: Kanegafuchi Chemical Industry Co Ltd
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Filing: 1973-03-20
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Granted: 1975-10-28
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Expires: 1993-03-20
Abstract
Abstract A polyvinyl chloride composition consisting of 100 parts by weight of vinyl chloride resins, 1 to 15 parts by weight of a finely divided silica having an average particle size of from 1 to 9 Mu which is prepared by removing alumina component from montmorillonite type clay such as Japanese acid clay and bentonite through mineral acid and other additives. The vinyl chloride resins includes polyvinyl chloride, copolymer of vinyl chloride and Alpha , Beta -ethylenically unsaturated monomer and mixture of polyvinyl chloride and other resins being compatible with polyvinyl chloride. As a finely divided silica, there may be also preferably employed one having a hydrophobic property which is prepared by further treating the above silica with a treating agent of silane type selected from the group consisting of alkylalkoxysilane and vinylalkoxysilane. The composition can give an unplasticized or plasticized article having an excellent electric insulation.
Inventors
- 👤 Kazuo Suzuki
- 👤 Yoshiaki Hayashi
- 👤 Kouzou Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:33
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/12; C08; C08K; C08K3/00; C08K3/34; C08K3/36; C08K9/00; C08K9/04; C08K9/06; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/40; C01P2006/80; C01P2006/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 words
POLYVINYL CHLORIDE COMPOSITION HAVING IMPROVED ELECTRICAL INSULATING PROPORTIONS COMPRISING 100 PARTS BY WEGHT OF A VINYL CHLORIDE RESIN AND 1 TO 15 PARTS BY WEIGHT OF A FILLER CONSISTING ESSENTIALLY OF FINELY DIVIDED SILICA HAVING AN AVERAGE PARTICLES SIZE OF FROM 1 TO 9 U WHICH IS PREPARED BY SUBSTANTIALL REMOVING ALUMINA COMPONENT FROM JAPANESE ACID CLAY THROUGH A MINERIAL ACID SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, HYDROCHLORIC ACID AND NITRIC ACID.
Claim 2
Dependent Claim
74 words
POLYVINYL CHLORIDE COMPOSITION HAVING IMPROVED ELECTRICAL INSULATING PROPORTIONS COMPRISING 100 PARTS BY WEGHT OF A VINYL CHLORIDE RESIN AND 1 TO 15 PARTS BY WEIGHT OF A FILLER CONSISTING ESSENTIALLY OF FINELY DIVIDED SILICA HAVING AN AVERAGE PARTICLES SIZE OF FROM 1 TO 9 U WHICH IS PREPARED BY SUBSTANTIALL REMOVING ALUMINA COMPONENT FROM JAPANESE ACID CLAY THROUGH A MINERIAL ACID SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, HYDROCHLORIC ACID AND NITRIC ACID.
Claim 3
Dependent Claim
73 words
The polyvinyl chloride composition of claim 1, wherein said finely divided silica is one treated with a treating agent of silane type having the following general formula: R4 nSi(OR'')n wherein R is methyl group, ethyl group or vinyl group, R'' is methyl group or ethyl group, and n is an integer of from 1 to 3, inclusive, in an amount of 0.3 to 5 % by weight to the silica to be treated.
Claim 4
Dependent Claim
35 words
The polyvinyl chloride composition of claim 1, wherein said finely divided silica is employed in an amount of from 3 to 10 parts by weight to 100 parts by weight of a vinyl chloride resin.
Claim 5
Dependent Claim
35 words
The polyvinyl chloride composition of claim 2, wherein said finely divided silica is employed in an amount of from 3 to 10 parts by weight to 100 parts by weight of a vinyl chloride resin.
Claim 6
Dependent Claim
55 words
The polyvinyl chloride composition of claim 1, in which at least one plasticizer selected from the group consisting of di-2-ethylhexyl phthalate, diisodecyl phthalate, ditridecyl phthalate, tri-2-ethylhexyl trimellitate, tetra-2-ethylhexyl pyromellitate and tricresyl phosphate is further added in an amount of 20 to 100 parts by weight to 100 parts by weight of a vinyl chloride resin.
Claim 7
Dependent Claim
15 words
The polyvinyl chloride composition of claim 1, wherein said vinyl chloride resin is polyvinyl chloride.
Claim 8
Dependent Claim
55 words
The polyvinyl chloride composition of claim 1, wherein said vinyl chloride resin is a copolymer of vinyl chloride and one member selected from the group consisting of vinyl acetate, methyl acrylate, ethyl acrylate, methyl methacrylate and vinyl butyl ether; the ratio of vinyl chloride unit in the copolymer being more than 50 % by mole.
Claim 9
Dependent Claim
57 words
The polyvinyl chloride composition of claim 1, wherein said vinyl chloride resin is a mixture of polyvinyl chloride and at least one member selected from the group consisting of ethylene-vinyl acetate copolymer, vinyl chloride-grafted ethylene-vinyl acetate copolymer and methyl methacrylate-styrene-butadiene terpolymer; the ratio of vinyl chloride unit in the mixture being more that 50 % by mole.
Claim 10
Dependent Claim
81 words
A plasticized polyvinyl chloride composition comprising 100 parts by weight of polyvinyl chloride, 5 to 10 parts by weight of a finely divided silica having an average particle size of from 1 to 9 Mu which is prepared by substantially removing alumina component from Japanese acid clay through sulfuric acid and 40 to 55 parts by weight of at least one plasticizer selected from the group consisting of di-2-ethylhexyl phthalate, diisodecyl phthalate, ditridecyl phthalate, tri-2-ethylhexyl trimellitate, tetra-2-ethylhexyl pyromellitate and tricresyl phosphate.
Claim 11
Dependent Claim
81 words
A plasticized polyvinyl chloride composition comprising 100 parts by weight of polyvinyl chloride, 5 to 10 parts by weight of a finely divided silica having an average particle size of from 1 to 9 Mu which is prepared by substantially removing alumina component from Japanese acid clay through sulfuric acid and 40 to 55 parts by weight of at least one plasticizer selected from the group consisting of di-2-ethylhexyl phthalate, diisodecyl phthalate, ditridecyl phthalate, tri-2-ethylhexyl trimellitate, tetra-2-ethylhexyl pyromellitate and tricresyl phosphate.
Claim 12
Dependent Claim
74 words
The plasticized polyvinyl chloride composition of claim 9, wherein said finely divided silica is one treated with a treating agent of silane type having the following general formula: R4 nSi(OR'')n wherein R is methyl group, ethyl group or vinyl group, R'' is methyl group or ethyl group, and n is an integer of from 1 to 3, inclusive, in an amount of 0.3 to 5 % by weight to the silica to be treated.
References Cited (Backward Citations)
US3622364A
Cited
US3692816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |