Title:
METHOD FOR PRODUCING AQUEOUS EMULSION OF ETHYLENE-VINYL ACETATE-BASED COPOLYMER
Document Type and Number:
Japanese Patent JP2004224995
Kind Code:
A
Abstract:
To provide a method for producing an aqueous emulsion of ethylene-vinyl acetate-based copolymer, containing or producing no formalin which is a harmful substance, and controlled as having a small particle diameter.
This method for producing the aqueous emulsion of the ethylene-vinyl acetate-based copolymer is provided by using a transition metal salt, erythorbic acids and/or ascorbic acids as reducing agents in a redox system catalyst, initiating the polymerization at 15-35°C temperature, elevating temperature to a prescribed polymerization temperature of 50-80°C by 0-60 min after the starting of the polymerization by using only the heat of the polymerization as a heat source and continuing the polymerization at 50-80°C afterwards.
Inventors:
SHIRAHASE TORU
ISE KATSUTOSHI
ISE KATSUTOSHI
Application Number:
JP2003017056A
Publication Date:
August 12, 2004
Filing Date:
January 27, 2003
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO
International Classes:
C08F2/16; C08F4/40; C08F218/08; (IPC1-7): C08F2/16; C08F4/40; C08F218/08
Attorney, Agent or Firm:
Takashi Kuboyama
Toru Nakayama
Masayuki Enomoto
Toru Nakayama
Masayuki Enomoto
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