Patent US4597182A successfully refreshed from Google Patents.
Patent US4647602A successfully refreshed from Google Patents.
US4647602A
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Method of dispersing fluoroplastics in polymeric compositions
Assignee: Bank One Youngstown NA
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Filing: 1985-05-01
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Granted: 1987-03-03
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Expires: 2005-05-01
Abstract
Abstract This invention provides a method of dispersing a fluoroplastic in a polymer composition. The method comprises the steps of comminuting the fluoroplastic to a uniform dispersion, admixing with the fluoroplastic a finely divided solid adherent material that will coat at least a portion of said fluoroplastic to form a coated fluoroplastic and combining said coated fluoroplastic with a polymer using intensive mixing means.
Inventors
- 👤 Boguslaw G. Wilczak
- 👤 Edward V. Wilkus
- 👤 Alexander F. Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:07
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/16; C; C08; C08J; C08J3/00; C08J3/005
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
63 words
A method of dispersing a fluoroplastic in a polymer composition, said method comprising the steps of: (a) comminuting the fluoroplastic to a uniform dispersion; (b) admixing with the fluoroplastic a finely divided solid adherent material that will coat at least a portion of said fluoroplastic to form a coated fluoroplastic; and (c) combining said coated fluoroplastic with a polymer using intensive mixing means.
Claim 2
Independent Claim
63 words
A method of dispersing a fluoroplastic in a polymer composition, said method comprising the steps of: (a) comminuting the fluoroplastic to a uniform dispersion; (b) admixing with the fluoroplastic a finely divided solid adherent material that will coat at least a portion of said fluoroplastic to form a coated fluoroplastic; and (c) combining said coated fluoroplastic with a polymer using intensive mixing means.
Claim 3
Dependent Claim
24 words
A method as defined in claim 1 wherein the fluoroplastic is comminuted to a range of from about 4 to 35 U.S. standard mesh.
Claim 4
Dependent Claim
33 words
A method as defined in claim 2 wherein the finely divided solid material is selected from the group consisting of aluminum silicate, silica, talc, alumina, wollastonite, graphitic carbon blacks and amorphous carbon blacks.
Claim 5
Dependent Claim
19 words
A method as define in claim 3 wherein the finely divided solid material is pretreated with derivatives of silane.
Claim 6
Dependent Claim
17 words
A method as defined in claim 3 wherein the finely divided solid material pretreatment includes a silicone.
Claim 7
Dependent Claim
33 words
A method as defined in claim 4 wherein the polymer composition contains a polymer selected from the group consisting of polyolefins, chlorinated polyolefins, ethylene vinyl acetate copolymers, ethylene-propylene rubber, ethylene-propylene terpolymer and polychloroprene.
Claim 8
Dependent Claim
31 words
A method as defined in claim 5 wherein the fluoroplastic is selected from the group consisting of polytetrafluoroethylene, fluorinated ethylene copolymer, perfluoroalkyoxy resin, ethylene-tetrafluoroethylene copolymer, polyvinylidene fluoride, polychlorotrifluoroethylene, ethylene-chlorotrifluoroethylene and polyvinylfluoride.
Claim 9
Dependent Claim
12 words
A method as defined in claim 6 wherein the fluoroplastic is polytetrafluoroethylene.
Claim 10
Dependent Claim
17 words
A method as defined in claim 7 wherein the finely divided solid material is aluminum is slicate.
Claim 11
Dependent Claim
13 words
A method as define in claim 8 wherein the polymer is a polyolefin.
Claim 12
Dependent Claim
12 words
A method as defined in claim 9 wherein the polymer is polyethylene.
Claim 13
Dependent Claim
12 words
A method as defined in claim 11 wherein the fluoroplastic is polytetrafluoroethylene.
Claim 14
Independent Claim
62 words
A method of dispersing a fluoroplastic in a polymer composition, said method consisting essentially of: (a) comminuting polytetrafluoroethylene to a uniform dispersion; (b) dry blending with said polytetrafluoroethylene a finely divided solid adherent material that will coat at least a portion of said polytetrafluoroethylene to form a coated polytetrafluoroethylene; and (c) combining said coated polytetrafluoroethylene with a polymer using intensive mixing means.
Claim 15
Independent Claim
62 words
A method of dispersing a fluoroplastic in a polymer composition, said method consisting essentially of: (a) comminuting polytetrafluoroethylene to a uniform dispersion; (b) dry blending with said polytetrafluoroethylene a finely divided solid adherent material that will coat at least a portion of said polytetrafluoroethylene to form a coated polytetrafluoroethylene; and (c) combining said coated polytetrafluoroethylene with a polymer using intensive mixing means.
References Cited (Backward Citations)
US3793287A
Cited
US3702267A
Cited
US3980612A
Cited
US4123401A
Cited
US3998770A
Cited
US4026863A
Cited
US4263184A
Cited
US4334037A
Cited
US4451616A
Cited
US4257929A
Cited
US4338376A
Cited
US4440879A
Cited
US4370436A
Cited
US4387168A
Cited
US4507439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |