US3890267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding material
Assignee: Mitsubishi Chemical Corp
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Filing: 1973-04-30
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Granted: 1975-06-17
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Expires: 1993-04-30
Abstract
Abstract Molding material, available for engineering plastics, comprising 95 to 20 % by weight of hydrolyzed ethylene-vinyl acetate copolymer and 5 to 80 % by weight of glass fiber. An ethylene content of the copolymer is 15 to 60 % by mole and the copolymer is hydrolyzed to the extent of more than 98 % by mole in vinyl acetate component. Moreover, the compounding of a viscosity modifier and a thermoplastic urethane resin is useful.
Inventors
- 👤 Mitio Fukushima
- 👤 Teruo Iwanami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:35
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08K3/00; C08K3/40; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L23/0861; C08L29/00; C08L29/02; C08L29/04; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
65 words
A MOLDING MATERIAL CONSISTING ESSENTIALLY OF 95 TO 20% BY WEIGHT OF A COPOLYMER CONSISTING ESSENTIALLY OF ETHYLENE AND VINYL ACETATE WHICH HAS BEEN HYDROLYZED AND 5 TO 80% BY WEIGHT OF GLASS FIBER, SAID COPOLYMER HAVING ETHYLENE CONTENT OF 15 TO 60% BY MOLE AND BEING HYDROLYZED TO THE EXTENT OF AT LEAST 98% BY MOLE OF THE VINYL ACETATE COMPONENT OF THE COPOLYMER.
Claim 2
Dependent Claim
65 words
A MOLDING MATERIAL CONSISTING ESSENTIALLY OF 95 TO 20% BY WEIGHT OF A COPOLYMER CONSISTING ESSENTIALLY OF ETHYLENE AND VINYL ACETATE WHICH HAS BEEN HYDROLYZED AND 5 TO 80% BY WEIGHT OF GLASS FIBER, SAID COPOLYMER HAVING ETHYLENE CONTENT OF 15 TO 60% BY MOLE AND BEING HYDROLYZED TO THE EXTENT OF AT LEAST 98% BY MOLE OF THE VINYL ACETATE COMPONENT OF THE COPOLYMER.
Claim 3
Dependent Claim
167 words
The molding material of claim 1, in which a viscosity modifier is further blended with said molding material in an amount of 0.0001 to 0.5% by weight with said copolymer; said viscosity modifier being one capable of making the ratio of the melt viscosity of said copolymer after standing for 10 minutes at 230*C. to that after standing for 5 minutes at 230*C. fall in the range of 1.05 to 3.0, said viscosity member being selected from the group consisting of hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, phosphorous acid, hypophosphorous acid, and boric acid; oxalic acid, citric acid, maleic acid, tartaric acid, formic acid, itaconic acid, lactic acid, adipic acid and malic acid; disodium hydrogenphosphate, sodium dihydrogenphosphate, sodium hydrogenoxalate, potassium hydrogenphosphate and potassium hydrogenformate, titanium oxysulfate; chelate compounds of titanium and aluminum; chromium chloride, zirconium acetate; mono-, di- and tri-alkylphosphine, mono-, di- and tri-arylphosphine, mono- and di-alkylphosphonic acid, mono- and di-arylphosphonic acid; ethyl phosphite, diphenylisodecyl phosphite, phenyldiisodecyl phosphite, trioctadecyl phosphite, triisodecyl phosphite and ethyl phosphate.
Claim 4
Dependent Claim
38 words
The molding material of claim 2, wherein said viscosity modifier is at least one member selected from the group consisting of phosphorous acid, phosphoric acid, sodium dihydrogenphosphate, disodium hydrogenphosphate, sulfuric acid, citric acid, oxalic acid and diphenylisodecyl phosphite.
References Cited (Backward Citations)
US3355415A
Cited
US3578630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |