DE2147568A1 - Verfahren zur Herstellung eines Formpulvers aus granulärem Polytetrafluoräthylen - Google Patents
Verfahren zur Herstellung eines Formpulvers aus granulärem PolytetrafluoräthylenInfo
- Publication number
- DE2147568A1 DE2147568A1 DE19712147568 DE2147568A DE2147568A1 DE 2147568 A1 DE2147568 A1 DE 2147568A1 DE 19712147568 DE19712147568 DE 19712147568 DE 2147568 A DE2147568 A DE 2147568A DE 2147568 A1 DE2147568 A1 DE 2147568A1
- Authority
- DE
- Germany
- Prior art keywords
- powder
- polymer
- slurry
- particle size
- deformability
- 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
- 239000000843 powder Substances 0.000 title claims description 43
- 238000000034 method Methods 0.000 title claims description 24
- -1 polytetrafluoroethylene Polymers 0.000 title claims description 19
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims description 19
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims description 19
- 230000008569 process Effects 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000000465 moulding Methods 0.000 title description 10
- 239000002245 particle Substances 0.000 claims description 36
- 239000012736 aqueous medium Substances 0.000 claims description 5
- 230000004048 modification Effects 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 description 35
- 239000002002 slurry Substances 0.000 description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 230000007423 decrease Effects 0.000 description 6
- 238000006116 polymerization reaction Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000013019 agitation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002609 medium Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000003868 ammonium compounds Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000007511 glassblowing Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011005 laboratory method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000003797 telogen phase Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000011800 void material 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S526/00—Synthetic resins or natural rubbers -- part of the class 520 series
- Y10S526/909—Polymerization characterized by particle size of product
Landscapes
- Chemical & Material Sciences (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)
- Compositions Of Macromolecular Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US7523570A | 1970-09-24 | 1970-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2147568A1 true DE2147568A1 (de) | 1972-03-30 |
Family
ID=22124404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19712147568 Pending DE2147568A1 (de) | 1970-09-24 | 1971-09-23 | Verfahren zur Herstellung eines Formpulvers aus granulärem Polytetrafluoräthylen |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3690569A (enExample) |
| JP (1) | JPS5246981B1 (enExample) |
| CA (1) | CA949274A (enExample) |
| DE (1) | DE2147568A1 (enExample) |
| FR (1) | FR2108474A5 (enExample) |
| GB (1) | GB1327323A (enExample) |
| NL (1) | NL7113186A (enExample) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2338285A1 (de) * | 1972-07-29 | 1974-02-14 | Daikin Ind Ltd | Koerniges polytetrafluoraethylenpulver |
| EP0784069A3 (de) * | 1995-12-21 | 1998-01-07 | Dyneon GmbH | Nichtrieselfähige Formpulver aus modifizierten Polytetrafluorethylenen |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3981852A (en) * | 1974-06-17 | 1976-09-21 | E. I. Du Pont De Nemours And Company | Polytetrafluoroethylene molding powder |
| US3981853A (en) * | 1974-06-17 | 1976-09-21 | E. I. Du Pont De Nemours And Comany | Polytetrafluoroethylene molding powder from polytetrafluoroethylene fine powder |
| DE4218965A1 (de) * | 1992-06-10 | 1993-12-16 | Hoechst Ag | Verfahren und Vorrichtung zur Herstellung eines Polymerisates des Tetrafluorethylens in wäßriger Suspension |
| DE19500871A1 (de) * | 1995-01-13 | 1996-07-18 | Basf Ag | Verfahren zum Recyclen von Diaphragmen |
| JP3453759B2 (ja) * | 1995-03-15 | 2003-10-06 | ダイキン工業株式会社 | ポリテトラフルオロエチレン成形用粉末の製造方法 |
| EP3215564B1 (en) * | 2014-11-03 | 2020-09-30 | Arkema, Inc. | Processes for increasing density of polymer flakes and powders |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3115486A (en) * | 1960-11-30 | 1963-12-24 | Du Pont | Process for the preparation of polytetrafluoroethylene molding powder |
| US3150834A (en) * | 1962-02-19 | 1964-09-29 | Grace W R & Co | Method of comminuting thermoplastic materials |
| GB1082859A (en) * | 1963-10-14 | 1967-09-13 | Daikin Ind Ltd | Polytetrafluoroethylene fibrous powders and process for producing the same |
| NL6716757A (enExample) * | 1966-12-15 | 1968-06-17 |
-
1970
- 1970-09-24 US US75235A patent/US3690569A/en not_active Expired - Lifetime
-
1971
- 1971-08-31 CA CA121,840A patent/CA949274A/en not_active Expired
- 1971-09-06 GB GB4146971A patent/GB1327323A/en not_active Expired
- 1971-09-22 JP JP46073526A patent/JPS5246981B1/ja active Pending
- 1971-09-23 FR FR7134295A patent/FR2108474A5/fr not_active Expired
- 1971-09-23 DE DE19712147568 patent/DE2147568A1/de active Pending
- 1971-09-24 NL NL7113186A patent/NL7113186A/xx unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2338285A1 (de) * | 1972-07-29 | 1974-02-14 | Daikin Ind Ltd | Koerniges polytetrafluoraethylenpulver |
| EP0784069A3 (de) * | 1995-12-21 | 1998-01-07 | Dyneon GmbH | Nichtrieselfähige Formpulver aus modifizierten Polytetrafluorethylenen |
Also Published As
| Publication number | Publication date |
|---|---|
| US3690569A (en) | 1972-09-12 |
| NL7113186A (enExample) | 1972-03-28 |
| GB1327323A (en) | 1973-08-22 |
| FR2108474A5 (enExample) | 1972-05-19 |
| CA949274A (en) | 1974-06-18 |
| JPS5246981B1 (enExample) | 1977-11-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OHN | Withdrawal |