US4308359A
Expired / Lapsed
US
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Method for the modification of polyvinylidene fluoride
Assignee: Dynamit Nobel AG
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Filing: 1978-10-23
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Granted: 1981-12-29
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Expires: 1998-10-23
Abstract
Abstract A graft polymer of polyvinylidene fluoride wherein the polyvinylidene fluoride has grafted thereon a polymer of an ethylenically unsaturated compound and a process for preparing such graft polymer by contacting polyvinylidene fluoride with a monomer of an ethylenically unsaturated compound in the presence of a radical forming catalyst while the polyvinylidene fluoride is maintained in the solid phase under conditions for polymerization of the ethylenically unsaturated compound.
Inventors
- 👤 Robert Buning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:40
CPC Classifications
C; C08; C08F; C08F259/00; C08F259/08
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
134 words
A graft polymer of polyvinylidene fluoride wherein the polyvinylidene fluoride has grafted thereon at least 0.5 percent by weight and up to 98 percent by weight of a polymer of an ethylenically unsaturated compound selected from the group consisting of styrene, a vinyl halide and an olefin prepared by contacting in the solid phase polyvinylidene fluoride with a monomer of an ethylenically unsaturated compound selected from the group consisting of styrene, a vinyl halide and an olefin and diffusing said monomer and a radical forming catalyst into said polyvinylidene fluoride in such an amount that said polyvinylidene fluoride remains in the solid phase and thereafter maintaining said polyvinylidene fluoride in the solid phase under polymerization conditions for said ethylenically unsaturated compound and polymerizing said ethylenically unsaturated compound in the absence of water and/or solvent.
Claim 2
Dependent Claim
134 words
A graft polymer of polyvinylidene fluoride wherein the polyvinylidene fluoride has grafted thereon at least 0.5 percent by weight and up to 98 percent by weight of a polymer of an ethylenically unsaturated compound selected from the group consisting of styrene, a vinyl halide and an olefin prepared by contacting in the solid phase polyvinylidene fluoride with a monomer of an ethylenically unsaturated compound selected from the group consisting of styrene, a vinyl halide and an olefin and diffusing said monomer and a radical forming catalyst into said polyvinylidene fluoride in such an amount that said polyvinylidene fluoride remains in the solid phase and thereafter maintaining said polyvinylidene fluoride in the solid phase under polymerization conditions for said ethylenically unsaturated compound and polymerizing said ethylenically unsaturated compound in the absence of water and/or solvent.
Claim 3
Dependent Claim
103 words
A graft polymer of polyvinylidene fluoride wherein the polyvinylidene fluoride has grafted thereon at least 0.5 percent by weight and up to 98 percent by weight of a polymer of methylmethacrylate and said graft polymer is insoluble in tetrahydrofuran prepared by contacting in the solid phase polyvinylidene fluoride with methylmethacrylate and diffusing said methylmethacrylate and a radical forming catalyst into said polyvinylidene fluoride in such an amount that said polyvinylidene fluoride remains in the solid phase and thereafter maintaining said polyvinylidene fluoride in the solid phase under polymerization conditions for said methylmethacrylate and polymerizing said methylmethacrylate in the absence of water and/or solvent.
Claim 4
Dependent Claim
103 words
A graft polymer of polyvinylidene fluoride wherein the polyvinylidene fluoride has grafted thereon at least 0.5 percent by weight and up to 98 percent by weight of a polymer of methylmethacrylate and said graft polymer is insoluble in tetrahydrofuran prepared by contacting in the solid phase polyvinylidene fluoride with methylmethacrylate and diffusing said methylmethacrylate and a radical forming catalyst into said polyvinylidene fluoride in such an amount that said polyvinylidene fluoride remains in the solid phase and thereafter maintaining said polyvinylidene fluoride in the solid phase under polymerization conditions for said methylmethacrylate and polymerizing said methylmethacrylate in the absence of water and/or solvent.
Claim 5
Dependent Claim
118 words
A graft polymer of polyvinylidene fluoride when the polyvinylidene fluoride has grafted thereon at least 0.5 percent by weight and up to 98 percent by weight of a polymer of an ethylenically unsaturated compound which graft polymer is resistant to solvents for polymethacrylic compounds prepared by contacting in the solid phase polyvinylidene fluoride with a monomer of an ethylenically unsaturated compound and diffusing said monomer and a radical forming catalyst into said polyvinylidene fluoride in such an amount that said polyvinylidene fluoride remains in the solid phase and thereafter maintaining said polyvinylidene fluoride in the solid phase under polymerization conditions for said ethylenically unsaturated compound and polymerizing said ethylenically unsaturated compound in the absence of water and/or solvent.
Claim 6
Dependent Claim
118 words
A graft polymer of polyvinylidene fluoride when the polyvinylidene fluoride has grafted thereon at least 0.5 percent by weight and up to 98 percent by weight of a polymer of an ethylenically unsaturated compound which graft polymer is resistant to solvents for polymethacrylic compounds prepared by contacting in the solid phase polyvinylidene fluoride with a monomer of an ethylenically unsaturated compound and diffusing said monomer and a radical forming catalyst into said polyvinylidene fluoride in such an amount that said polyvinylidene fluoride remains in the solid phase and thereafter maintaining said polyvinylidene fluoride in the solid phase under polymerization conditions for said ethylenically unsaturated compound and polymerizing said ethylenically unsaturated compound in the absence of water and/or solvent.
Claim 7
Dependent Claim
112 words
A graft polymer of polyvinylidene fluoride when the polyvinylidene fluoride has grafted thereon at least 0.5 percent by weight and up to 98 percent by weight of a polymer of an ethylenically unsaturated compound which graft polymer is resistant to tetrahydrofuran prepared by contacting the solid phase polyvinylidene fluoride with a monomer of ethylenically unsaturated compound and diffusing said monomer and a radical forming catalyst into said polyvinylidene fluoride in such an amount that said polyvinylidene fluoride remains in solid phase and thereafter maintaining said polyvinylidene fluoride in the solid phase under polymerization conditions for said ethylenically unsaturated compound and polymerizing said ethylenically unsaturated compound in the absence of water and/or solvent.
Claim 8
Dependent Claim
112 words
A graft polymer of polyvinylidene fluoride when the polyvinylidene fluoride has grafted thereon at least 0.5 percent by weight and up to 98 percent by weight of a polymer of an ethylenically unsaturated compound which graft polymer is resistant to tetrahydrofuran prepared by contacting the solid phase polyvinylidene fluoride with a monomer of ethylenically unsaturated compound and diffusing said monomer and a radical forming catalyst into said polyvinylidene fluoride in such an amount that said polyvinylidene fluoride remains in solid phase and thereafter maintaining said polyvinylidene fluoride in the solid phase under polymerization conditions for said ethylenically unsaturated compound and polymerizing said ethylenically unsaturated compound in the absence of water and/or solvent.
Claim 9
Dependent Claim
12 words
A graft polymer according to claim 1 wherein said compound is styrene.
Claim 10
Dependent Claim
14 words
A graft polymer according to claim 1 wherein said compound is a vinyl halide.
Claim 11
Dependent Claim
13 words
A graft polymer according to claim 1 wherein said compound is an olefin.
Claim 12
Dependent Claim
14 words
A graft polymer according to claim 6 wherein said vinyl halide is vinyl chloride.
Claim 13
Dependent Claim
14 words
A graft polymer according to claim 6 wherein said vinyl halide is vinyl fluoride.
Claim 14
Dependent Claim
14 words
A graft polymer according to claim 6 wherein said vinyl halide is vinylidene fluoride.
Claim 15
Dependent Claim
12 words
A graft polymer according to claim 6 wherein said olefin is ethylene.
Claim 16
Dependent Claim
12 words
A graft polymer according to claim 6 wherein said olefin is propylene.
Claim 17
Dependent Claim
28 words
A graft polymer according to claim 1 wherein said polyvinylidene fluoride has a melt flow index at 265° C. and 12.5 kp load of between 0.1 and 80.
Claim 18
Dependent Claim
39 words
A graft polymer according to claim 1 wherein the polymer of the ethylenically unsaturated compound is present in the graft polymer composition in an amount between 0.5 and 30 weight percent based on the weight of the graft copolymer.
Claim 19
Dependent Claim
23 words
A graft polymer according to claim 1 wherein the graft polymer itself has a molecular weight between 1000×10 3 and 21×l0 3 .
Claim 20
Dependent Claim
27 words
A graft polymer according to claim 15 wherein the polyvinylidene fluoride portion of the graft polymer has a molecular weight between 500×10 3 and 10×10 3 .
Claim 21
Dependent Claim
38 words
A graft polymer according to claim 16 wherein the scion branch of the graft polymer corresponding to the polymer of the ethylenically unsaturated compound has a molecular weight within the range of 1×10 3 to 500×10 3 .
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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |