Title:
THERMALLY EXPANDABLE POLYVINYLIDENE CHLORIDE MICROSPHERE AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/041978
Kind Code:
A1
Abstract:
A thermally expandable polyvinylidene chloride microsphere and a preparation method therefor. The method comprises: dissolving 250-550 parts of water phase polymerization inhibitor, 20-100 parts of dispersant, and 3-15 parts of dispersant monomer in deionized water on the basis of parts by weight; adjusting the pH value of the solution and cooling down to obtain a water phase for further use; dissolving 5-15 parts of crosslinking agent and 20-45 parts of initiator in 1000-2000 parts of mixed monomers and cooling down to obtain an oil phase for further use; mixing the water phase and the oil phase and then carrying out homogenization while stirring to obtain a homogenized mixed solution; adding 300-550 parts of foaming agent to the homogenized mixed solution and carrying out homogenization while stirring to obtain a homogenized mixed solution containing the foaming agent; and reacting the homogenized mixed solution containing the foaming agent while stirring, after the reaction is finished, cooling down to room temperature, filtering an obtained suspension to obtain a filtrate, dewatering the filtrate by centrifugation, and carry out drying to obtain thermally expandable polyvinylidene chloride microspheres.
Inventors:
ZHAO XINBEN (CN)
WU YUPENG (CN)
WU ZHIGANG (CN)
HAN JINMING (CN)
SU LANHUI (CN)
CHAI YUDENG (CN)
MA CONGLI (CN)
ZHOU HONGXIN (CN)
SU GANG (CN)
LU JUNMING (CN)
WU YUPENG (CN)
WU ZHIGANG (CN)
HAN JINMING (CN)
SU LANHUI (CN)
CHAI YUDENG (CN)
MA CONGLI (CN)
ZHOU HONGXIN (CN)
SU GANG (CN)
LU JUNMING (CN)
Application Number:
PCT/CN2021/101495
Publication Date:
March 03, 2022
Filing Date:
June 22, 2021
Export Citation:
Assignee:
ZHEJIANG QUZHOU JUSU CHEMICAL IND CO LTD (CN)
ZHEJIANG JUHUA CO LTD ELECTROCHEMISTRY PLANT (CN)
ZHEJIANG JUHUA CO LTD ELECTROCHEMISTRY PLANT (CN)
International Classes:
C08F220/48; C08F2/00; C08F2/18; C08F214/22; C08F220/06; C08F220/14; C08F222/14; C08F226/06; C08F230/08; C08J9/20; C08J9/32
Foreign References:
| CN112159547A | 2021-01-01 | |||
| CN112126007A | 2020-12-25 | |||
| CN110922631A | 2020-03-27 | |||
| CN108084483A | 2018-05-29 | |||
| CN108047480A | 2018-05-18 | |||
| US3615972A | 1971-10-26 | |||
| US3945956A | 1976-03-23 | |||
| US6235394B1 | 2001-05-22 | |||
| US6509384B2 | 2003-01-21 | |||
| CN102746454A | 2012-10-24 | |||
| CN106832110A | 2017-06-13 | |||
| CN102633936A | 2012-08-15 |
Attorney, Agent or Firm:
NINGBO AOSHENG PATENT AGENT COMPANY LIMITED. (CN)
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