US4642326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinylidene fluoride base blend polymer
Assignee: Central Glass Co Ltd
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Filing: 1984-11-16
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Granted: 1987-02-10
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Expires: 2004-11-16
Abstract
Abstract A blend polymer composition, which is superior to polyvinylidene fluoride (PVDF) in impact resistance and retains favorable properties of PVDF, is obtained by blending 1-100 parts, and preferably 1-50 parts, by weight of a copolymer of vinylidene fluoride (VDF) and hexafluoroacetone (HFA) with 100 parts by weight of PVDF. Preferably the mole ratio of copolymerized VDF to HFA is from 96:4 to 50:50.
Inventors
- 👤 Takashi Yasumura
- 👤 Toshio Koishi
- 👤 Isao Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:45
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16; C08L2205/00; C08L2205/02; C08L61/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
49 words
A blend polymer composition comprising: 100 parts by weight of a polyvinylidene fluoride resin; and 1 to 100 parts by weight of a copolymer of vinylidene fluoride and hexafluoroacetone; wherein the mole ratio of vinylidene fluoride to hexafluoroacetone in said copolymer is in the range from 96:4 to 50:50.
Claim 2
Dependent Claim
49 words
A blend polymer composition comprising: 100 parts by weight of a polyvinylidene fluoride resin; and 1 to 100 parts by weight of a copolymer of vinylidene fluoride and hexafluoroacetone; wherein the mole ratio of vinylidene fluoride to hexafluoroacetone in said copolymer is in the range from 96:4 to 50:50.
Claim 3
Dependent Claim
21 words
A blend polymer composition according to claim 1, wherein the amount of said copolymer is 1 to 50 parts by weight.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |