Title:
COMPOSITE RESIN PARTICLES, FOAMABLE PARTICLES, FOAMED PARTICLES, MOLDED FOAM, AND PRODUCTION METHOD FOR COMPOSITE RESIN PARTICLES
Document Type and Number:
WIPO Patent Application WO/2023/243584
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: composite resin particles that can provide molded foam having excellent strength without undergoing an annealing step in production of the composite resin particles; and foamed particles that allow relatively fast escape of a foaming agent, and are capable of reducing the molding cycle of molded foam. The present invention pertains to the following polystyrene-based composite resin particles (C). The polystyrene-based composite resin particles (C) are for producing molded foam and contain a polyolefin-based resin and a polystyrene-based resin at a mass ratio of 10:90 to 50:50. In an image of the composite resin particles (C) obtained by the following method, (1) a bicontinuous structure of the polyolefin-based resin and the polystyrene-based resin is observed, (2) at least one polystyrene-based resin fine particle having a particle size of at least 1.0 μm is observed, and (3) the area proportion of the polystyrene-based resin fine particles having a particle size of at least 1.0 μm is 1-50%. Image-obtaining method: A thin film obtained by slicing the composite resin particles (C) through the centers of the particles is imaged by a transmission electron microscope to obtain an image in which a square portion thereof has a side of 10 μm and includes the centers of the particles.
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Inventors:
ISAYAMA AKIRA (JP)
YAMASHITA MASASHI (JP)
YAMASHITA MASASHI (JP)
Application Number:
PCT/JP2023/021685
Publication Date:
December 21, 2023
Filing Date:
June 12, 2023
Export Citation:
Assignee:
SEKISUI KASEI CO LTD (JP)
International Classes:
C08J9/18; C08L23/00; C08L25/04
Domestic Patent References:
| WO2016047382A1 | 2016-03-31 | |||
| WO2004085527A1 | 2004-10-07 | |||
| WO2016136460A1 | 2016-09-01 |
Foreign References:
| JP2016190991A | 2016-11-10 | |||
| JP2011202005A | 2011-10-13 | |||
| JP2002284916A | 2002-10-03 | |||
| JP2009114432A | 2009-05-28 | |||
| JP2011042718A | 2011-03-03 |
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (JP)
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