Title:
POLYMER-CONTAINING O/W-TYPE EMULSION COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2022/138482
Kind Code:
A1
Abstract:
Provided is an O/W-type emulsion composition having enhanced emulsion stability. More specifically, provided is an O/W-type emulsion composition which contains a water-absorbent polymer, wherein the water-absorbent polymer satisfies the following conditions (A), (B), and (C). (A): The particle size after water swelling is 100-600 μm. (B): at least one among (B-1) and (B-2) is satisfied. (B-1): The slope in the log-log plot of the steady-flow viscosity of an aqueous solution of 1 mass% of the polymer is -1 to 0 (exclusive of 0, in the range of shear rate of 0.1-1,000 s-1). (B-2): Yield stress/yield strain balance of an aqueous solution of 1 mass% of the polymer is at least 10. (C): When an aqueous solution of 1 mass% of the polymer and 0.5 mass% of sodium chloride is sieved with an aperture of 75 μm, the amount of polymer remaining on the sieve is at most 50 mass% with respect to the amount of the aqueous solution containing polymer, and when 100 g of said composition is centrifuged at 2,000 rpm for 10 minutes at 25 °C, a separation liquid volume is less than 3 g.
Inventors:
MIYAMOTO MAKIKO (JP)
YAMAGUCHI HIROFUMI (JP)
YAMAGUCHI HIROFUMI (JP)
Application Number:
PCT/JP2021/046706
Publication Date:
June 30, 2022
Filing Date:
December 17, 2021
Export Citation:
Assignee:
SUMITOMO SEIKA CHEMICALS (JP)
International Classes:
C08F20/04; C08K3/36; C08K5/00; C08K5/06; C08L101/14
Domestic Patent References:
| WO2016002751A1 | 2016-01-07 | |||
| WO2018198737A1 | 2018-11-01 |
Foreign References:
| JP2015224240A | 2015-12-14 | |||
| JP2018095637A | 2018-06-21 | |||
| JP2016023143A | 2016-02-08 | |||
| JP2016147813A | 2016-08-18 | |||
| JP2017081875A | 2017-05-18 |
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (JP)
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