DE1950767C3 - Verfahren zum Herstellen von körnigem Polytetrafluorethylen - Google Patents
Verfahren zum Herstellen von körnigem PolytetrafluorethylenInfo
- Publication number
- DE1950767C3 DE1950767C3 DE1950767A DE1950767A DE1950767C3 DE 1950767 C3 DE1950767 C3 DE 1950767C3 DE 1950767 A DE1950767 A DE 1950767A DE 1950767 A DE1950767 A DE 1950767A DE 1950767 C3 DE1950767 C3 DE 1950767C3
- Authority
- DE
- Germany
- Prior art keywords
- polymerization
- buffer
- polymer
- medium
- dispersant
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims description 18
- 230000008569 process Effects 0.000 title claims description 10
- -1 polytetrafluoroethylene Polymers 0.000 title claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims description 7
- 238000006116 polymerization reaction Methods 0.000 claims description 61
- 239000000872 buffer Substances 0.000 claims description 47
- 239000002270 dispersing agent Substances 0.000 claims description 33
- 239000002609 medium Substances 0.000 claims description 26
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 6
- 239000003505 polymerization initiator Substances 0.000 claims description 4
- 239000012736 aqueous medium Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 description 34
- 238000006243 chemical reaction Methods 0.000 description 12
- 238000002474 experimental method Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 239000003999 initiator Substances 0.000 description 6
- 239000012190 activator Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 229910021645 metal ion Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 3
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 235000012501 ammonium carbonate Nutrition 0.000 description 3
- 239000001099 ammonium carbonate Substances 0.000 description 3
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 3
- YOALFLHFSFEMLP-UHFFFAOYSA-N azane;2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluorooctanoic acid Chemical compound [NH4+].[O-]C(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F YOALFLHFSFEMLP-UHFFFAOYSA-N 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- GDTSJMKGXGJFGQ-UHFFFAOYSA-N 3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound O1B([O-])OB2OB([O-])OB1O2 GDTSJMKGXGJFGQ-UHFFFAOYSA-N 0.000 description 1
- 239000004160 Ammonium persulphate Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910000792 Monel Inorganic materials 0.000 description 1
- HOGKWLXRMABQDU-UHFFFAOYSA-N OB(O)OB(O)O.N.N.N.N Chemical compound OB(O)OB(O)O.N.N.N.N HOGKWLXRMABQDU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 235000019395 ammonium persulphate Nutrition 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001246 colloidal dispersion Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000012611 container material Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000004815 dispersion polymer Substances 0.000 description 1
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000004965 peroxy acids Chemical class 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F14/00—Homopolymers and 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
- C08F14/18—Monomers containing fluorine
- C08F14/26—Tetrafluoroethene
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Polymerisation Methods In General (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US76631468A | 1968-10-09 | 1968-10-09 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE1950767A1 DE1950767A1 (de) | 1970-07-16 |
| DE1950767B2 DE1950767B2 (de) | 1979-03-01 |
| DE1950767C3 true DE1950767C3 (de) | 1979-10-18 |
Family
ID=25076069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1950767A Expired DE1950767C3 (de) | 1968-10-09 | 1969-10-08 | Verfahren zum Herstellen von körnigem Polytetrafluorethylen |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3629219A (enExample) |
| JP (2) | JPS4816711B1 (enExample) |
| DE (1) | DE1950767C3 (enExample) |
| FR (1) | FR2020219A1 (enExample) |
| GB (1) | GB1281907A (enExample) |
| NL (1) | NL6914098A (enExample) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3629219A (en) * | 1968-10-09 | 1971-12-21 | Du Pont | Process for increasing the surface area of granular polytetrafluoroethylene resin |
| US3855191A (en) * | 1973-04-04 | 1974-12-17 | Du Pont | Polytetrafluoroethylene molding powders of tetrafluoroethylene and perfluoro (alkyl vinyl ether) copolymer |
| JPS53136013U (enExample) * | 1977-04-04 | 1978-10-27 | ||
| JPS542306U (enExample) * | 1977-06-08 | 1979-01-09 | ||
| JPS5533563U (enExample) * | 1978-08-26 | 1980-03-04 | ||
| US4596837A (en) * | 1982-02-22 | 1986-06-24 | Daikin Industries Ltd. | Semisintered polytetrafluoroethylene article and production thereof |
| US5229480A (en) * | 1992-09-03 | 1993-07-20 | E. I. Du Pont De Nemours And Company | Vinyl fluoride polymerization |
| DE4331971A1 (de) * | 1993-09-21 | 1995-03-23 | Hoechst Ag | Polytetrafluorethylen-Mikropulver, ihre Herstellung und Verwendung |
| DE4332712A1 (de) * | 1993-09-25 | 1995-03-30 | Hoechst Ag | Verfahren zur Herstellung eines modifizierten Polytetrafluorethylens und seine Verwendung |
| JP4080554B2 (ja) * | 1995-12-06 | 2008-04-23 | ダイキン工業株式会社 | テトラフルオロエチレンの乳化重合方法 |
| US7314898B2 (en) * | 2004-12-29 | 2008-01-01 | 3M Innovative Properties Company | Microsphere-filled polytetrafluoroethylene compositions |
| US7485609B2 (en) * | 2005-09-29 | 2009-02-03 | Kimberly-Clark Worldwide, Inc. | Encapsulated liquid cleanser |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2393967A (en) * | 1942-12-24 | 1946-02-05 | Du Pont | Process for polymerizing tetrafluoroethylene |
| US3629219A (en) * | 1968-10-09 | 1971-12-21 | Du Pont | Process for increasing the surface area of granular polytetrafluoroethylene resin |
-
1968
- 1968-10-09 US US766314A patent/US3629219A/en not_active Expired - Lifetime
-
1969
- 1969-09-09 JP JP44071025A patent/JPS4816711B1/ja active Pending
- 1969-09-17 NL NL6914098A patent/NL6914098A/xx unknown
- 1969-10-06 GB GB49070/69A patent/GB1281907A/en not_active Expired
- 1969-10-08 DE DE1950767A patent/DE1950767C3/de not_active Expired
- 1969-10-08 FR FR6934326A patent/FR2020219A1/fr not_active Withdrawn
-
1972
- 1972-12-23 JP JP47128892A patent/JPS4929628B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US3629219A (en) | 1971-12-21 |
| JPS4816711B1 (enExample) | 1973-05-24 |
| DE1950767B2 (de) | 1979-03-01 |
| GB1281907A (en) | 1972-07-19 |
| JPS4929628B1 (enExample) | 1974-08-06 |
| NL6914098A (enExample) | 1970-04-13 |
| DE1950767A1 (de) | 1970-07-16 |
| FR2020219A1 (enExample) | 1970-07-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C3 | Grant after two publication steps (3rd publication) |