公开(公告)号：DE3667306D1

公开(公告)日：1990-01-11

申请号：DE3667306

申请日：1986-08-19

Applicant: STAMICARBON

Inventor： SCHELLEKENS RONALD MICHAEL ALE ,  RUTTEN HENDRIKUS JOHANNES JOSE ,  LEMSTRA PIETER JAN

IPC: B29C55/00 ,  B29D7/00 ,  C08J5/18 ,  D01D5/00 ,  D01F6/14

Abstract: High modulus and high strength articles of polyvinyl-­alcohol are obtained by thermoreversible gelation of a 5-50 wt.% solu­tion of a polyvinylalcohol with an M w of 2.5 × 10⁴ to 5 × 10⁵ in water, followed by solvent removal and high stretching.Pref. gelation is obtained by cooling to a temperature of at least 40 ◊C below the gelation temperature.With this process low costs of solvent removal and regeneration are obtained.

公开(公告)号：AT48446T

公开(公告)日：1989-12-15

申请号：AT86201436

申请日：1986-08-19

Applicant: STAMICARBON

Inventor： SCHELLEKENS RONALD MICHAEL ALE ,  RUTTEN HENDRIKUS JOHANNES JOSE ,  LEMSTRA PIETER JAN

IPC: B29C55/00 ,  B29D7/00 ,  C08J5/18 ,  D01D5/00 ,  D01F6/14

Abstract: High modulus and high strength articles of polyvinyl-­alcohol are obtained by thermoreversible gelation of a 5-50 wt.% solu­tion of a polyvinylalcohol with an M w of 2.5 × 10⁴ to 5 × 10⁵ in water, followed by solvent removal and high stretching.Pref. gelation is obtained by cooling to a temperature of at least 40 ◊C below the gelation temperature.With this process low costs of solvent removal and regeneration are obtained.