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Title:
A METHOD FOR PREPARING AQUEOUS COPOLYMER DISPERSIONS
Document Type and Number:
WIPO Patent Application WO/2019/126913
Kind Code:
A1
Abstract:
The invention relates to a method for preparing an aqueous dispersion of a copolymer comprising polymerized comonomers vinyl ester and ethylene, characterized in that ethylene and the vinyl ester are charged in multiple steps, where the initial charge ratio of ethylene to the vinyl ester is 0.2 to 0.6:1; and the vinyl ester is copolymerized with ethylene in the presence of a) anionic surfactant 1, which has the following chemical formula: C nH 2n+1O-EO x-POy-Q (I), where n is an integer between 6 and 44, inclusive; x is an integer between 0 and 11, inclusive; y is an integer between 0 and 11, inclusive; at least one of x and y is non-zero; and Q is any one selected from among sulphate, sulfonate, carboxylate and phosphate salts.

Inventors:
WANG, Feng (Walter) (Building 3, 1535 Hongmei Rd Caohejing Hi-Tech Park, Shanghai 3, 200233, CN)
CHEN, Honggang (Henry) (Building 3, 1535 Hongmei Rd Caohejing Hi-Tech Park, Shanghai 3, 200233, CN)
HUANG, Lingyun (Roy) (Building 3, 1535 Hongmei Rd Caohejing Hi-Tech Park, Shanghai 3, 200233, CN)
JIA, Xiaohui (Jesse) (Building 3, 1535 Hongmei Rd Caohejing Hi-Tech Park, Shanghai 3, 200233, CN)
ZHU, Liliang (Eric) (Building 3, 1535 Hongmei Rd Caohejing Hi-Tech Park, Shanghai 3, 200233, CN)
Application Number:
CN2017/118186
Publication Date:
July 04, 2019
Filing Date:
December 25, 2017
Export Citation:
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Assignee:
WACKER CHEMIE AG (Hanns-Seidel-Platz 4, Muenchen, Muenchen, DE)
WANG, Feng (Walter) (Building 3, 1535 Hongmei Rd Caohejing Hi-Tech Park, Shanghai 3, 200233, CN)
International Classes:
C08F218/08; C08F2/00; C08F2/22; C08F2/24; C08F2/30; C08F210/02
Foreign References:
CN102333799A2012-01-25
CN102030858A2011-04-27
CN101041704A2007-09-26
CN103140514A2013-06-05
US20130102702A12013-04-25
US20140088249A12014-03-27
US20120015201A12012-01-19
US20130338299A12013-12-19
Attorney, Agent or Firm:
NTD PATENT AND TRADEMARK AGENCY LTD. (10th Floor, Tower C Beijing Global Trade Center,36 North Third Ring Road East, Dongcheng District, Beijing 3, 100013, CN)
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