GB588590A - The preparation of articles consisting essentially of a polymer of tetrafluoroethylene - Google Patents
The preparation of articles consisting essentially of a polymer of tetrafluoroethyleneInfo
- Publication number
- GB588590A GB588590A GB5105/45A GB510545A GB588590A GB 588590 A GB588590 A GB 588590A GB 5105/45 A GB5105/45 A GB 5105/45A GB 510545 A GB510545 A GB 510545A GB 588590 A GB588590 A GB 588590A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polymer
- water
- tetrafluoroethylene
- ethyl
- liquid
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Articles, e.g. sheets, of tetrafluoroethylene polymers and copolymers are made by forming a slurry of the finely-divided polymer in a liquid which wets the polymer and is readily vaporizable at atmospheric or reduced pressure at 327 DEG C., sedimenting the polymer therefrom in a layer, removing the supernatant liquid, e.g. by filtration under reduced pressure, allowing to stand until free from volatile liquid, e.g. by circulating warm air over it, and sintering at a temperature above 327 DEG C. The baked article may be quenched, e.g. in water, to improve its transparency. Non - porous articles are obtained by pressing the sediment at 50 to 10,000 pounds per square inch after removing the supernatant liquid. Suitable liquids are methyl and ethyl alcohols, acetone, acetic acid, ethyl acetate, hexane, tetrachloroethylene, ethyl ether, pinene, triethanolamine, dibutyl phthalate and mixtures of ethyl alcohol and water or ethyl acetate and hexane. Wetting agents such as sodium sulphosuccinate may be used with water. The process may be made continuous. The product may be moulded, drawn, pressed, hammered or machined by sawing, drilling, punching, shaping, milling or grinding. Copolymers of tetrafluoroethylene with ethylene or isobutylene are described.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US928293XA | 1944-03-01 | 1944-03-01 | |
US588590XA | 1944-03-01 | 1944-03-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB588590A true GB588590A (en) | 1947-05-28 |
Family
ID=26738095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5105/45A Expired GB588590A (en) | 1944-03-01 | 1945-03-01 | The preparation of articles consisting essentially of a polymer of tetrafluoroethylene |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB588590A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3303154A (en) * | 1962-10-18 | 1967-02-07 | Nitto Chemical Industry Co Ltd | Coating compositions |
US4433082A (en) * | 1981-05-01 | 1984-02-21 | E. I. Du Pont De Nemours And Company | Process for making liquid composition of perfluorinated ion exchange polymer, and product thereof |
-
1945
- 1945-03-01 GB GB5105/45A patent/GB588590A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3303154A (en) * | 1962-10-18 | 1967-02-07 | Nitto Chemical Industry Co Ltd | Coating compositions |
US4433082A (en) * | 1981-05-01 | 1984-02-21 | E. I. Du Pont De Nemours And Company | Process for making liquid composition of perfluorinated ion exchange polymer, and product thereof |
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