Patent US3976618A successfully refreshed from Google Patents.
US3976618A
Expired / Lapsed
US
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Molding made of hydrolyzed ethylene-vinyl acetate copolymer
Assignee: Mitsubishi Chemical Corp
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Filing: 1974-07-30
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Granted: 1976-08-24
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Expires: 1994-07-30
Abstract
Abstract Molding, having an improved heat deflection property, comprising 95 to 50 % by weight of hydrolyzed ethylene-vinyl acetate copolymer and 5 to 50 % by weight of talc. Dispersion of larger amount of talc in molding composition is improved by incorporating 2 to 10 % by weight of elastomers per the copolymer.
Inventors
- 👤 Hiroshi Takida
- 👤 Yoshimi Akamatu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:56
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
68 words
A molding composition comprising 95 to 50 % by weight of hydrolyzed ethylene-vinyl acetate copolymer and 5 to 50 % by weight of talc; said hydrolyzed ethylene-vinyl acetate copolymer having an ethylene content of 20 to 50 % by mole, a vinyl acetate content of 80 to 50 % by mole and a degree of hydrolysis in vinyl acetate component of not less than 90 % by mole.
Claim 2
Dependent Claim
68 words
A molding composition comprising 95 to 50 % by weight of hydrolyzed ethylene-vinyl acetate copolymer and 5 to 50 % by weight of talc; said hydrolyzed ethylene-vinyl acetate copolymer having an ethylene content of 20 to 50 % by mole, a vinyl acetate content of 80 to 50 % by mole and a degree of hydrolysis in vinyl acetate component of not less than 90 % by mole.
Claim 3
Dependent Claim
51 words
The molding composition of claim 1, wherein said hydrolyzed ethylene-vinyl acetate copolymer has an ethylene content of 25 to 40 % by mole, a vinyl acetate content of 75 to 60 % by mole and a degree of hydrolysis in vinyl acetate component of not less than 95 % by mole.
Claim 4
Dependent Claim
56 words
The molding composition of claim 1, wherein said talc has a brightness of not less than 80 and a particle size of not more than 840 μ and shows pH 7 to 9.5 in 5 % by weight aqueous suspension thereof; said brightness being the value measured at 452 mμ in wave length by brightness meter.
Claim 5
Dependent Claim
29 words
The molding composition of claim 1, in which an elastomer is further incorporated in the ratio of 2 to 10 % by weight per the hydrolyzed ethylene-vinyl acetate copolymer.
Claim 6
Dependent Claim
10 words
A molded article comprising the molding composition of claim 1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |