GB1161023A - Process for Polymerizing Tetrafluoroethylene - Google Patents
Process for Polymerizing TetrafluoroethyleneInfo
- Publication number
- GB1161023A GB1161023A GB2722367A GB2722367A GB1161023A GB 1161023 A GB1161023 A GB 1161023A GB 2722367 A GB2722367 A GB 2722367A GB 2722367 A GB2722367 A GB 2722367A GB 1161023 A GB1161023 A GB 1161023A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polymerization
- range
- tetrafluoroethylene
- june
- aqueous medium
- 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
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)
Abstract
1,161,023. Polymerization of tetrafluoroethylene. DAIKIN KOGYO CO. Ltd. 13 June, 1967 [15 June, 1966], No. 27223/67. Heading C3P. Tetrafluoroethylene is polymerized at a temperature of 0‹ to 40‹ C. and a pressure of 0 to 30 atmospheres in an aqueous medium containing an inorganic polymerization initiator system and having a pH within the range of 5À0 to 10À0 while adding a buffer agent in an amount necessary to maintain the aqueous medium at a given pH within the range during the polymerization. Using an initiator system comprising an inorganic peroxide crude polytetrafluoroethylene particles may be prepared which when pulverized give a non-fibrous granular powder having a wet-sieve size of not greater than 40 microns, a shape factor of not more than 15, an anisotropic expansion coefficient within the range of 1À02 to 1À26 and a surface smoothness of at least 15 seconds. In the examples were used; KH 2 PO 4 , Na 2 HPO 4 , Na 2 B 4 O 7 , (NH 4 ) 2 S 2 O 8 , NaHSO 3 and FeSO 4 .
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3821766 | 1966-06-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1161023A true GB1161023A (en) | 1969-08-13 |
Family
ID=12519127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2722367A Expired GB1161023A (en) | 1966-06-15 | 1967-06-13 | Process for Polymerizing Tetrafluoroethylene |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1720479A1 (en) |
GB (1) | GB1161023A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0048308A1 (en) * | 1980-09-19 | 1982-03-31 | Asahi Glass Company Ltd. | Process for producing propylene-tetrafluoroethylene copolymer |
US5153285A (en) * | 1990-07-13 | 1992-10-06 | Hoechst Aktiengesellschaft | Process for the preparation of tetrafluoroethylene polymer in aqueous suspension |
-
1967
- 1967-06-13 GB GB2722367A patent/GB1161023A/en not_active Expired
- 1967-06-14 DE DE19671720479 patent/DE1720479A1/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0048308A1 (en) * | 1980-09-19 | 1982-03-31 | Asahi Glass Company Ltd. | Process for producing propylene-tetrafluoroethylene copolymer |
US5153285A (en) * | 1990-07-13 | 1992-10-06 | Hoechst Aktiengesellschaft | Process for the preparation of tetrafluoroethylene polymer in aqueous suspension |
Also Published As
Publication number | Publication date |
---|---|
DE1720479A1 (en) | 1972-03-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |