Method for producing saponified ethylene-vinyl acetate...

Details Method for producing saponified ethylene-vinyl acetate... Method for producing saponified ethylene-vinyl acetate...

2005-06-07

2005-06-07

Reddick, Judy M. (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S056000

Reexamination Certificate

active

06903159

ABSTRACT:
A method for producing a saponified ethylene-vinyl acetate copolymer which comprises saponifying an ethylene-vinyl acetate copolymer in an alcohol-based solvent with an alkali catalyst, wherein an amount between 100 ppm and 15,000 ppm of water with respect to the ethylene-vinyl acetate copolymer is supplied into the alcohol-based solvent. According to this method, discoloration, etc. of a saponified ethylene-vinyl acetate copolymer is inhibited, and visual characteristics of the saponified copolymer are improved.

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