FIELD: organic chemistry.
SUBSTANCE: invention relates to partially amorphicized polyvinyl alcohol with the crystallinity degree less 45%. The aim of invention: preparing polyvinyl alcohol with the definite crystallinity as powder that can be filtered easily from reaction medium and swelling easily in cold water. These properties, in turn, promote to preparing spinning solutions for formation of fibers. This aim is solved by partially amorphicized polyvinyl alcohol with crystallinity degree above 5% but less 45% that exhibits above indicated properties. Polyvinyl alcohol shows particles size 500 mcm, not above, and the polymerization degree from 300 to 20000. Polyvinyl alcohol is prepared by alkaline saponification in medium water/(C1-C3)-alcohol.
EFFECT: valuable properties of polyvinyl alcohol.
5 cl, 2 tbl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF SYNTHESIS OF AMORPHOUZED POLYVINYL ALCOHOL | 2001 |
|
RU2205191C1 |
| METHOD OF POLYVINYL ALCOHOL SYNTHESIS | 1989 |
|
SU1713251A3 |
| LOW-BRANCHED HIGH-MOLECULAR POLYVINYL ACETATE, METHOD FOR ITS PREPARING AND POLYVINYL ALCOHOL BASED ON THEREOF | 2002 |
|
RU2265617C2 |
| MODIFIED POLYVINYL BUTYRAL AND METHOD FOR ITS PRODUCTION | 1992 |
|
RU2086566C1 |
| AQUEOUS EMULSION AND USE THEREOF | 2006 |
|
RU2405008C2 |
| METHOD OF PRODUCING POLYVINYL ALCOHOL COMPOSITION FOR MAKING FILM MATERIALS FOR MEDICAL PURPOSES | 2011 |
|
RU2499012C2 |
| METHOD OF PREPARING CATION-STABILISED AND WATER-REDISPERSIBLE POLYMER POWDER COMPOSITIONS | 2007 |
|
RU2434894C2 |
| METHOD OF PREPARING POLYVINYLIC ALCOHOL | 0 |
|
SU717070A1 |
| DISPERSANT FOR SUSPENSION POLYMERISATION, VINYLCHLORIDE RESIN AND METHOD OF OBTAINING THEREOF | 2011 |
|
RU2583156C2 |
| METHOD FOR OBTAINING COMPOSITION OF WATER-SOLUBLE POLYMERS | 2014 |
|
RU2574257C1 |
