US4200568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinylidene fluoride compositions, and fabricated products thereof having increased notch impact toughness and elongation at rupture
Assignee: Dynamit Nobel AG
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Filing: 1979-02-12
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Granted: 1980-04-29
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Expires: 1999-02-12
Abstract
Abstract A composition comprising a polyvinylidene fluoride and a fluoroelastomer, especially a fluoroelastomer containing moieties of vinylidene fluoride and hexa- or pentafluoropropylene, and methods for the preparation of formed articles from such composition and formed articles thereof having improved notch impact toughness and elongation at rupture. This is a continuation, filed June 8, 1977, now abandoned, which in turn is a continuation of 609,870 filed Sept. 2, 1975 (now abandoned).
Inventors
- 👤 Werner Trautvetter
- 👤 Gregor Weisgerber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:04
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
67 words
A cross-linkable composition comprising polyvinylidene fluoride and between 1 and 30 percent by weight of a fluoroelastomer having a reduced viscosity between 60 and 400 ml/g, measured at 30° C. on a 0.5 solution in acetone, said fluoroelastomer being a copolymer of 75-85 mol percent of vinylidene fluoride and 15-25 mol percent of hexafluoropropylene or pentafluoropropylene or a mixture thereof, said composition containing a chemical cross-linking agent.
Claim 2
Dependent Claim
67 words
A cross-linkable composition comprising polyvinylidene fluoride and between 1 and 30 percent by weight of a fluoroelastomer having a reduced viscosity between 60 and 400 ml/g, measured at 30° C. on a 0.5 solution in acetone, said fluoroelastomer being a copolymer of 75-85 mol percent of vinylidene fluoride and 15-25 mol percent of hexafluoropropylene or pentafluoropropylene or a mixture thereof, said composition containing a chemical cross-linking agent.
Claim 3
Dependent Claim
44 words
A composition comprising polyvinylidene fluoride and 1 to 30 percent by weight of a fluoroelastomer which is a terpolymer of 50-80 mol percent of vinylidene fluoride, 5-25 mol percent of tetrafluoroethylene and 15-25 mol percent of hexafluoropropylene or pentafluoropropylene and a chemical cross-linking agent.
Claim 4
Dependent Claim
44 words
A composition comprising polyvinylidene fluoride and 1 to 30 percent by weight of a fluoroelastomer which is a terpolymer of 50-80 mol percent of vinylidene fluoride, 5-25 mol percent of tetrafluoroethylene and 15-25 mol percent of hexafluoropropylene or pentafluoropropylene and a chemical cross-linking agent.
Claim 5
Dependent Claim
64 words
A composition according to claim 1 wherein said polyvinylidene fluoride has a reduced viscosity, measured at 120° C. on a 0.5% solution in cyclohexanone, between 80 and 200 ml/g, a melt flow index number, measured pursuant to ASTM D 1238, Cond. j, of about 1 to 200 and an average molecular weight, measured osmotically at 90° C. in dimethylformamide, of 50,000 to about 250,000.
Claim 6
Dependent Claim
31 words
A composition according to claim 1 wherein said cross-linking agent is an aliphatic or cycloaliphatic diamine derivative and is present in an amount of 5-15 millimoles per 100 grams of fluoroelastomer.
Claim 7
Dependent Claim
29 words
A composition according to claim 1 wherein said cross-linking agent is an aromatic dihydroxy compound and is present in an amount of 5-15 millimoles per 100 grams of fluoroelastomer.
Claim 8
Dependent Claim
25 words
A composition according to claim 7 wherein said cross-linking agent is selected from the group consisting of hexamethylene diamine carbamate, 4,4'-methylene-bis-cyclohexylamine carbamate and dicinnamylidene-1,6-hexane diamine.
Claim 9
Dependent Claim
25 words
A composition according to claim 5 wherein said cross-linking agent is selected from the group consisting of hydroquinone, a bisphenol, p,p'-biphenol, 2,4-dihydroxybenzopheneone and a phenolphthalein.
Claim 10
Dependent Claim
24 words
A composition according to claim 7 wherein said cross-linking agent is a bisphenol and the bisphenol is bisphenol A, bisphenol AF or bisphenol S.
Claim 11
Dependent Claim
29 words
A composition according to claim 5 wherein the composition additionally contains a vulcanization accelerator which is present in an amount of 0.2 to 20 millimoles per 100 grams elastomer.
Claim 12
Dependent Claim
25 words
A composition according to claim 9 wherein the vulcanization accelerator is present in an amount of 0.5 to 5 millimoles per 100 grams of elastomer.
Claim 13
Dependent Claim
48 words
A composition according to claim 9 wherein the vulcanization accelerator is selected from the group consisting of a secondary aliphatic amine, a tertiary aliphatic amine, a cycloaliphatic amine having a boiling point above 150° C., a quaternary ammonium salt, an aliphatic phosphonium salt and an aliphatic-aromatic phosphonium salt.
Claim 14
Dependent Claim
27 words
A composition according to claim 11, wherein said vulcanization accelerator is selected from the group consisting of tributylamine, dicyclohexylamine, methyltrioctylammonium chloride allyltriphenylphosphonium chloride and benzyltriphenyl phosphonium chloride.
Claim 15
Dependent Claim
17 words
A cross-linkable composition according to claim 1 containing magnesium oxide or calcium hydroxide as an acid acceptor.
Claim 16
Dependent Claim
29 words
A cross-linkable composition according to claim 13 wherein the magnesium oxide or calcium hydroxide is present in an amount of 5 to 15 gm per 100 gm of fluoroelastomer.
Claim 17
Dependent Claim
13 words
A composition according to claim 13 wherein the cross-linking agent is bisphenol AF.
Claim 18
Dependent Claim
12 words
A composition according to claim 13 wherein the cross-linking agent is p,p'-bisphenol.
Claim 19
Dependent Claim
13 words
A composition according to claim 13 wherein the cross-linking agent is diamine carbamate.
Claim 20
Dependent Claim
16 words
A composition according to claim 15 additionally containing an accelerator, said accelerator being allyltriphenyl phosphonium chloride.
Claim 21
Dependent Claim
14 words
A composition according to claim 16 containing an accelerator, said accelerator being methyltrioctylammonium chloride.
Claim 22
Dependent Claim
26 words
A process for forming an article from a molding composition comprising polyvinylidene fluoride, the improvement which comprises employing as the composition, the composition of claim 1.
Claim 23
Dependent Claim
26 words
In a process for forming an article from a composition comprising polyvinylidene fluoride, the improvement which comprises employing as the composition, the composition of claim 1.
Claim 24
Dependent Claim
26 words
In a process for forming an article from a composition comprising polyvinylidene fluoride, the improvement which comprises employing as the composition, the composition of claim 9.
Claim 25
Dependent Claim
22 words
A process according to claim 20 wherein the composition is passed through a pair of calendar rollers to prepare a sheet thereof.
Claim 26
Dependent Claim
25 words
A process according to claim 20 wherein said article is formed by filling a mold with said composition and compressing said composition in said mold.
Claim 27
Dependent Claim
33 words
A process according to claim 20 wherein said article of said composition is formed by passing said composition in heated form through an extrusion die and an extrudite thereof is formed and cooled.
Claim 28
Dependent Claim
31 words
A process according to claim 20 wherein said article is formed by heating the composition in an injection molding machine and in a plastified condition injecting said composition into a mold.
Claim 29
Dependent Claim
9 words
A formed article of the composition of claim 1.
Claim 30
Dependent Claim
9 words
A formed article of the composition of claim 1.
Claim 31
Dependent Claim
9 words
A formed article of the composition of claim 9.
Claim 32
Dependent Claim
109 words
A process for improving the notch impact toughness and other physical properties of a polyvinylidene fluoride molding composition which consists essentially of: (a) adding to a polyvinylidene fluoride resinous composition between 1 and 30 weight percent of a fluoroelastomer having a reduced viscosity between 60 and 400 ml/g measured at 30° C. on a 0.5 solution in acetone, said fluoroelastomer being a copolymer of 75-85 mol percent of vinylidene fluoride and 15-25 mol percent of hexafluoropropylene or pentafluoropropylene or a mixture thereof; (b) compounding the resulting polyvinylidene fluoride-fluoroelastomer composition together with a chemical curing agent; and (c) subjecting the compounded composition to a temperature of 180° to 280° C.
Claim 33
Dependent Claim
109 words
A process for improving the notch impact toughness and other physical properties of a polyvinylidene fluoride molding composition which consists essentially of: (a) adding to a polyvinylidene fluoride resinous composition between 1 and 30 weight percent of a fluoroelastomer having a reduced viscosity between 60 and 400 ml/g measured at 30° C. on a 0.5 solution in acetone, said fluoroelastomer being a copolymer of 75-85 mol percent of vinylidene fluoride and 15-25 mol percent of hexafluoropropylene or pentafluoropropylene or a mixture thereof; (b) compounding the resulting polyvinylidene fluoride-fluoroelastomer composition together with a chemical curing agent; and (c) subjecting the compounded composition to a temperature of 180° to 280° C.
Claim 34
Dependent Claim
49 words
A process according to claim 30 wherein the fluorelastomer is initially mixed with a vulcanizer additive on a cooled roller mixer and thereafter the fluoroelastomer-vulcanizer composition is added to melted polyvinylidene fluoride and the polyvinylidene-fluoroelastomer composition is subjected to thermoplastic fabrication at a temperature of 180° to 280° C.
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) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |