FIELD: chemistry.
SUBSTANCE: 0.001-0.1 wt %, in terms of weight of polytetrafluoroethylene (PTFE), of a defined carboxylic acid salt such as ammonium laurate, 0.001-0.02 wt %, in terms of weight of PTFE, of an emulsifying agent of the type of a defined fluorine-containing carboxylic acid (e.g. ammonium perfluorooctanoate), and 1-20 wt % in terms of weight of PTFE, of a defined non-ionic surfactant are dissolved in a low-concentration aqueous dispersion of PTFE containing 1-40 wt % fine PTFE particles; and the low-concentration aqueous dispersion of PTFE is concentrated to concentration of 60-75 wt %.
EFFECT: dispersion is less liable to colouring a coating during thermal treatment, does not contain hazardous ionic impurities, has high stability of friction properties.
10 cl, 3 tbl, 11 ex
| Title | Year | Author | Number |
|---|---|---|---|
| AQUEOUS DISPERSION OF POLYTETRAFLUOROETHYLENE AND PREPARATION METHOD THEREOF | 2005 |
|
RU2400499C2 |
| POLYTETRAFLUOROETHYLENE AQUEOUS DISPERSION AND PRODUCT THEREOF | 2006 |
|
RU2419642C2 |
| METHOD OF PREPARING AQEOUS DISPERSION OF PURIFIED POLYTETRAFLUOROETHYLENE | 2005 |
|
RU2387672C2 |
| METHOD OF PRODUCING AQUEOUS DISPERSION OF FLUORINE-CONTAINING POLYMER, HAVING LOW CONTENT OF FLUORINE-CONTAINING EMULSIFYING AGENT | 2007 |
|
RU2439083C2 |
| FLUOROPOLYMER AQUEOUS DISPERSION | 2007 |
|
RU2434022C2 |
| FLUOROPOLYMER DISPERSION CONTAINING NO OR SMALL AMOUNT OF LOW-MOLECULAR WEIGHT FLUORINATED SURFACTANT | 2002 |
|
RU2294940C2 |
| METHOD OF PURIFYING FLUORINATED COMPOUND | 2009 |
|
RU2510713C2 |
| METHOD FOR CONCENTRATION OF AQUEOUS DISPERSION OF FLUOROPOLYMER | 1993 |
|
RU2092500C1 |
| METHOD FOR PRODUCING MODIFIED POLYTETRAFLUOROETHYLENE, METHOD FOR PRODUCING MODIFIED POLYTETRAFLUOROETHYLENE POWDER AND METHOD FOR PRODUCING STRETCHED POROUS MATERIAL | 2019 |
|
RU2803928C2 |
| COATING COMPOSITION | 2004 |
|
RU2261877C1 |
