FIELD: polymer production.
SUBSTANCE: invention aims at purifying thermally processed tetrafluoroethylene copolymers so that the latter acquire high optical properties. Method of invention resides in that polymeric latex of thermally processed tetrafluoroethylene copolymers prepared via polymerization in dispersion or in water emulsion is converted into gel form by adding, at mechanical stirring, acid electrolyte to achieve pH of medium below 2 and, after which polymeric gel is washed with acidic aqueous solutions or neutral solutions within a pH range between 1 and 7.
EFFECT: increased purification efficiency.
18 cl, 3 tbl, 6 ex
| Title | Year | Author | Number |
|---|---|---|---|
| MICROSPHERES OF THERMALLY PROCESSED TETRAFLUOROETHYLENE COPOLYMER | 2001 |
|
RU2271366C2 |
| THERMOPROCESSIBLE TETRAFLUOROETHYLENE COPOLYMER | 1994 |
|
RU2141489C1 |
| METHOD OF PRODUCING HEAT-TREATED TETRAFLUOROETHYLENE AND HEXAFLUOROPROPYLENE COPOLYMERS | 2011 |
|
RU2463312C1 |
| PERFLUORODIOXOLS, METHOD OF PREPARING THEREOF (VARIANTS), PERFLUORODIOXOLE HOMOPOLYMERS AND COPOLYMERS, THERMALLY PROCESSIBLE TETRAFLUOROETHYLENE COPOLYMERS | 1994 |
|
RU2139866C1 |
| TETRAFLUOROETHYLENE COPOLYMER | 2003 |
|
RU2315777C2 |
| TETRAFLUOROETHYLENE COPOLYMERS AND METHOD OF PRODUCING TETRAFLUOROETHYLENE COPOLYMERS | 2006 |
|
RU2378292C2 |
| METHOD OF TETRAFLUOROETHYLENE COPOLYMERS PRODUCING (VARIANTS) | 1994 |
|
RU2100378C1 |
| METHOD OF PREPARING VINYLIDENE FLUORIDE- TETRAFLUOROETHYLENE COPOLYMERS | 1998 |
|
RU2139891C1 |
| MODIFIED TETRAFLUOROETHYLENE/ETHYLENE COPOLYMER PRODUCTION PROCESS | 1999 |
|
RU2156776C1 |
| METHOD OF PRODUCING GRANULAR HEAT-RESISTANT COPOLYMERS OF TETRAFLUOROETHYLENE WITH ETHYLENE AND COPOLYMERS OBTAINED USING SAID METHOD | 2009 |
|
RU2398789C1 |
