Modifiziertes Vinylalkohol-Copolymer, Harzfolie und Wasserlösliche Verpackung

Details

Veröffentlichungs-Nr.

EP4782471

Anmeldetag

22. Januar 2026

Veröffentlichung

29. Juli 2026

Rechtsraum

EP

Abstract

A modified polyvinyl alcohol copolymer has a degree of saponification of 70 mole% or more according to JIS K 6726 (1994) standard, comprising monomer units containing carboxyl groups and monomer units containing lactam functional groups; wherein when a ¹H-NMR spectrum of the copolymer is measured at 400 MHz and 25°C using DMSO-d6 as solvent, an integrated area of the spectrum from 3.65 to 4.00 ppm is defined as 1 and the integrated area from 2.05 to 2.35 ppm in the spectrum is 0.002 to 0.200; wherein when the copolymer is subjected to thermal analysis using a differential scanning calorimeter, in the curve with temperature as X-axis and heat flow as Y-axis, the slope between 100°C and melting point Tm(°C) is between - 0.00100 and -0.00190 W/g°C. The copolymer is applicable for preparing polyvinyl alcohol water-soluble films. The present disclosure also relates to a resin film and water-soluble package.

Anmelder

Firma

Chang Chun Petrochemical Co., Ltd.

Land

🇹🇼 Taiwan