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Title:
POLYMER PARTICLES, THICKENER, AND COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2021/199465
Kind Code:
A1
Abstract:
The present invention provides: polymer particles which can be dissolved in a dissolution medium without generating lumps, and can uniformly improve the viscosity of a composition; and a thickener using said polymer particles. The polymer particles according to the present invention are characterized in that: the number-average particle diameter is 1-50 μm; the coefficient of variation in the number-based particle size distribution is at least 30%; and when the weight-average molecular weight of all the polymer particles is denoted by A, the weight-average molecular weight of small particles having a cumulative number percentage of at most 5% from the small diameter side in the number-based particle size distribution of the polymer particles is denoted by B, and the weight-average molecular weight of large particles having a particle diameter corresponding to at least 5 times the number-average particle diameter of the polymer particles is denoted by C, expression (1) and expression (2) are satisfied. 0.90≤(B/A)<1.0 expression (1) (C/B)<1.25 expression (2)

Inventors:
TAKAHASHI TOMOYUKI (JP)
Application Number:
PCT/JP2020/037330
Publication Date:
October 07, 2021
Filing Date:
September 30, 2020
Export Citation:
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Assignee:
SEKISUI KASEI CO LTD (JP)
International Classes:
C08F6/04; C08F20/10; C08L33/04; C08L101/00; C09K3/00
Attorney, Agent or Firm:
YAMAMOTO, Takuya (JP)
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