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Title:
CHLOROPRENE POLYMER LATEX AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2020/137297
Kind Code:
A1
Abstract:
The present invention provides a sulfur-modified chloroprene polymer latex which is characterized by including an emulsifying agent and a sulfur-modified chloroprene polymer obtained by modifying a chloroprene polymer (A) with sulfur (B), and in that the sulfur content Y in the sulfur-modified chloroprene polymer and the z-average particle size X of the sulfur-modified chloroprene polymer satisfy formulas (1) to (3) (formula (1): 0.10 < Y < 0.60; formula (2): 120 < X < 320; and formula (3): Y < 0.0025X – 0.20), wherein the total of a chloroprene monomer (A–1) constituting the chloroprene polymer and a monomer (A–2) copolymerizable with the chloroprene monomer is 100 parts by mass, the amount of sulfur (B) included in the sulfur-modified chloroprene polymer is Y parts by mass, and the z-average particle size of the sulfur-modified chloroprene polymer is X nm. The present invention additionally provides a sulfur-modified chloroprene polymer latex composition that includes the sulfur-modified chloroprene polymer latex, a metal oxide (C), a cross-linking accelerator (D), and an antioxidant (E). With this sulfur-modified chloroprene polymer latex composition, the issue (low storage stability) facing conventional sulfur-modified polychloroprenes having excellent cross-linking properties (especially tensile strength) is remedied.

Inventors:
MURATA TOMOAKI (JP)
OGAWA MASAHIRO (JP)
OGAWA NORIKO (JP)
KAMIJO MASANAO (JP)
Application Number:
PCT/JP2019/045936
Publication Date:
July 02, 2020
Filing Date:
November 25, 2019
Export Citation:
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Assignee:
SHOWA DENKO KK (JP)
International Classes:
C08K5/00; A41D19/00; A41D19/04; C08K3/22; C08L11/02; C08L93/04
Domestic Patent References:
WO2012157658A12012-11-22
Foreign References:
JP2003055409A2003-02-26
JPS6031510A1985-02-18
JPH11116622A1999-04-27
JP2019044116A2019-03-22
JP2011122141A2011-06-23
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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