US4749610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass fiber reinforced flexible composite material using soft fluororesin
Assignee: Central Glass Co Ltd
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Filing: 1987-02-17
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Granted: 1988-06-07
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Expires: 2007-02-17
Abstract
Abstract A glass fiber reinforced flexible composite material is obtained by dispersing or embedding glass fiber in a fluororesin, which is a graft copolymer obtained by grafting a crystalline fluoro-polymer to an elastomeric fluoro-polymer. For example, the graft copolymer is obtained by graft polymerization of vinylidene fluoride with an elastomeric copolymer of vinylidene fluoride, chlorotrifluoroethylene and an unsaturated peroxy compound. The composite material possesses the physical and chemical properties characteristic of fluororesins and is flexible and easily melt processable. Sheets of this composite material using a glass fiber cloth have a soft feel and can easily be joined by high-frequency welding.
Inventors
- 👤 Seiichi Katsuragawa
- 👤 Chikashi Kawashima
- 👤 Tomio Masaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:44
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08F; C08F259/00; C08F259/08; C08J5/0405; C08J5/043; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/16; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3602; Y10T442/365
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
86 words
A glass fiber reinforced composite material, comprising: a fluororesin obtained by graft copolymerization of at least one fluorine-containing vinylic monomer, which gives a crystalline polymer not lower than 130° C. in melting temperature, with an elastomeric fluoro-copolymer which has peroxy bonds and is lower than room temperature in glass transition temperature; and glass fiber which amounts to 3-60 wt % of the composite material and is embedded in and intimately adherent to said fluororesin, said fluororesin being once melted in the presence of said glass fiber.
Claim 2
Dependent Claim
86 words
A glass fiber reinforced composite material, comprising: a fluororesin obtained by graft copolymerization of at least one fluorine-containing vinylic monomer, which gives a crystalline polymer not lower than 130° C. in melting temperature, with an elastomeric fluoro-copolymer which has peroxy bonds and is lower than room temperature in glass transition temperature; and glass fiber which amounts to 3-60 wt % of the composite material and is embedded in and intimately adherent to said fluororesin, said fluororesin being once melted in the presence of said glass fiber.
Claim 3
Dependent Claim
20 words
A composite material according to claim 1, wherein said glass fiber is in the form of a glass fiber cloth.
Claim 4
Dependent Claim
16 words
A composite mateial according to claim 2, wherein said glass fiber cloth is a woven cloth.
Claim 5
Dependent Claim
23 words
A composite material according to claim 2, wherein said glass fiber cloth is laid with and embedded in laminar layers of said fluororesin.
Claim 6
Dependent Claim
18 words
A composite material according to claim 1, wherein said glass fiber is in the form of short fibers.
Claim 7
Dependent Claim
20 words
A composite material according to claim 1, wherein said glass fiber amounts to 5-40 wt % of the composite material.
Claim 8
Dependent Claim
33 words
A composite material according to claim 1, wherein the ratio of said elastomeric fluoro-copolymer to the fluorine-containing crystalline polymer grafted to said fluoro-copolymer is in the range from 50:50 to 90:10 by weight.
Claim 9
Dependent Claim
76 words
A composite material according to claim 1, wherein said elastomeric fluoro-copolymer is selected from the group consisting of ternary copolymers of vinylidene fluoride, chlorotrifluoroethylene and another monomer which has both double bond and peroxy bond, ternary copolymers of vinylidene fluoride, hexafluoropropene and said another monomer, quaternary copolymers of vinylidene fluoride, hexafluoropropene, tetrafluoroethylene and said another monomer, ternary copolymers of tetrafluoroethylene, propylene and said another monomer and ternary copolymers of tetrafluoroethylene, perfluorovinyl ether and said another monomer.
Claim 10
Dependent Claim
18 words
A composite material according to claim 8, wherein said at least one fluorine-containing vinylic monomer comprises vinylidene fluoride.
Claim 11
Dependent Claim
43 words
A composite material according to claim 1, wherein said fluororesin is a graft copolymer obtained by graft polymerization of vinylidene fluoride in the presence of an elastomeric copolymer of vinylidene fluoride chlorotrifluoroethylene and another monomer which has both double bond and peroxy bond.
References Cited (Backward Citations)
US3934064A
Cited
US4612238A
Cited
US4472557A
Cited
JPS6031859A
Cited
JPS6161849A
Cited
US4702956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |