DE2208077A1 - Verfahren zur Herstellung eines Polytetrafluorethylen- Pulvers - Google Patents
Verfahren zur Herstellung eines Polytetrafluorethylen- PulversInfo
- Publication number
- DE2208077A1 DE2208077A1 DE19722208077 DE2208077A DE2208077A1 DE 2208077 A1 DE2208077 A1 DE 2208077A1 DE 19722208077 DE19722208077 DE 19722208077 DE 2208077 A DE2208077 A DE 2208077A DE 2208077 A1 DE2208077 A1 DE 2208077A1
- Authority
- DE
- Germany
- Prior art keywords
- latex
- polytetrafluoroethylene
- freeze
- dried
- extrusion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims description 29
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims description 29
- -1 polytetrafluoroethylene Polymers 0.000 title claims description 24
- 238000000034 method Methods 0.000 title claims description 20
- 239000000843 powder Substances 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000004816 latex Substances 0.000 claims description 21
- 229920000126 latex Polymers 0.000 claims description 21
- 238000004108 freeze drying Methods 0.000 claims description 10
- 238000005345 coagulation Methods 0.000 claims description 7
- 230000015271 coagulation Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000008346 aqueous phase Substances 0.000 claims description 2
- 238000010908 decantation Methods 0.000 claims 1
- 239000011347 resin Substances 0.000 description 21
- 229920005989 resin Polymers 0.000 description 21
- 238000001125 extrusion Methods 0.000 description 20
- 229920000642 polymer Polymers 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000001035 drying Methods 0.000 description 6
- 239000000314 lubricant Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 4
- 239000012736 aqueous medium Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000000859 sublimation Methods 0.000 description 3
- 230000008022 sublimation Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 101000606535 Homo sapiens Receptor-type tyrosine-protein phosphatase epsilon Proteins 0.000 description 1
- 102100039665 Receptor-type tyrosine-protein phosphatase epsilon Human genes 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000001246 colloidal dispersion Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000011953 free-radical catalyst Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 238000010128 melt processing Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
- C08J3/16—Powdering or granulating by coagulating dispersions
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11815871A | 1971-02-23 | 1971-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2208077A1 true DE2208077A1 (de) | 1972-09-07 |
Family
ID=22376824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19722208077 Pending DE2208077A1 (de) | 1971-02-23 | 1972-02-21 | Verfahren zur Herstellung eines Polytetrafluorethylen- Pulvers |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3692759A (enExample) |
| CA (1) | CA943697A (enExample) |
| DE (1) | DE2208077A1 (enExample) |
| FR (1) | FR2127658A5 (enExample) |
| GB (1) | GB1327159A (enExample) |
| IT (1) | IT947765B (enExample) |
| NL (1) | NL7202338A (enExample) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4276334A (en) * | 1974-01-31 | 1981-06-30 | General Company Limited | Pressure sensitive recording sheet |
| JPS57135405A (en) | 1981-02-17 | 1982-08-21 | Tadahisa Sakamoto | Manufacture of surface material of record disk bearing photograph or illustration |
| US4576869A (en) * | 1984-06-18 | 1986-03-18 | E. I. Du Pont De Nemours And Company | Tetrafluoroethylene fine powder and preparation thereof |
| US4917834A (en) * | 1988-11-16 | 1990-04-17 | General Technology Applications, Inc. | Method for forming homogeneous blends of particulate materials |
| US5185414A (en) * | 1991-01-18 | 1993-02-09 | Ici Americas Inc. | Drying temperature independent polytetrafluoroethylene |
| US5256744A (en) * | 1991-01-18 | 1993-10-26 | Ici Americas Inc. | Drying temperature independent polytetrafluoroethylene |
| JP3303408B2 (ja) * | 1992-07-09 | 2002-07-22 | ダイキン工業株式会社 | 含フッ素樹脂複合微粒子 |
| US5543217A (en) * | 1995-02-06 | 1996-08-06 | E. I. Du Pont De Nemours And Company | Amorphous copolymers of tetrafluoroethylene and hexafluoropropylene |
| US6720360B1 (en) * | 2000-02-01 | 2004-04-13 | 3M Innovative Properties Company | Ultra-clean fluoropolymers |
| GB2434152A (en) * | 2006-01-16 | 2007-07-18 | Whitford Plastics Ltd | Fluoropolymer powdered materials |
| GB2451096A (en) * | 2007-07-17 | 2009-01-21 | Whitford Plastics Ltd | Method of preparing a powdered fluoropolymer blend |
| GB2451097A (en) * | 2007-07-17 | 2009-01-21 | Whitford Plastics Ltd | Silicon carbide-modified fluoropolymer powders |
| ES2743535T3 (es) * | 2008-05-30 | 2020-02-19 | Whitford Corp | Composiciones de fluoropolímeros mezclados |
| CA2737586C (en) * | 2008-09-26 | 2016-11-08 | Whitford Corporation | Blended fluoropolymer compositions and coatings for flexible substrates |
| TW201016800A (en) | 2008-09-26 | 2010-05-01 | Whitford Corp | Blended fluoropolymer coatings for rigid substrates |
| US20100092759A1 (en) * | 2008-10-13 | 2010-04-15 | Hua Fan | Fluoropolymer/particulate filled protective sheet |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3464964A (en) * | 1966-06-13 | 1969-09-02 | Pennsalt Chemicals Corp | Coagulation of polytetrafluoroethylene latex |
-
1971
- 1971-02-23 US US118158A patent/US3692759A/en not_active Expired - Lifetime
-
1972
- 1972-01-31 CA CA133,574A patent/CA943697A/en not_active Expired
- 1972-02-07 GB GB560372A patent/GB1327159A/en not_active Expired
- 1972-02-21 DE DE19722208077 patent/DE2208077A1/de active Pending
- 1972-02-21 FR FR7205696A patent/FR2127658A5/fr not_active Expired
- 1972-02-22 IT IT20839/72A patent/IT947765B/it active
- 1972-02-22 NL NL7202338A patent/NL7202338A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL7202338A (enExample) | 1972-08-25 |
| US3692759A (en) | 1972-09-19 |
| GB1327159A (en) | 1973-08-15 |
| CA943697A (en) | 1974-03-12 |
| FR2127658A5 (enExample) | 1972-10-13 |
| IT947765B (it) | 1973-05-30 |
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