Title:
CROSSLINKED POLYARYLENE SULFIDE, COMPOSITION, AND METHOD FOR PRODUCING MOLDED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2022/137648
Kind Code:
A1
Abstract:
A problem addressed by the present invention is to provide a method for producing a crosslinked polyarylene sulfide (PAS) in which variations in melt viscosity between lots are suppressed and the quality stability is excellent. More particularly, the present invention is a method for producing a crosslinked PAS characterized by comprising a step for obtaining a compression-molded product by compression molding a powdery uncrosslinked PAS; a step for measuring the porosity of the compression-molded product; a step for obtaining a pulverized material by pulverizing the portion of the compression-molded product that falls within a prescribed porosity range; a step for obtaining a granulated material by granulating the pulverized material; and a step for executing oxidative crosslinking on the granulated material yielded by the previous step. Also provided are a method for producing a composition including the crosslinked PAS and a method for producing a molded article by melt-molding the composition.
Inventors:
FUNAHASHI CHIKARA (JP)
WATANABE HIDEKI (JP)
FURUSAWA TAKASHI (JP)
WATANABE HIDEKI (JP)
FURUSAWA TAKASHI (JP)
Application Number:
PCT/JP2021/031291
Publication Date:
June 30, 2022
Filing Date:
August 26, 2021
Export Citation:
Assignee:
DAINIPPON INK & CHEMICALS (JP)
International Classes:
B29C43/34; C08J3/12; C08G75/0259; C08G75/0277; C08J3/24
Foreign References:
| JPH04248841A | 1992-09-04 | |||
| JPH0665376A | 1994-03-08 | |||
| JPH04128011A | 1992-04-28 | |||
| JPH061855A | 1994-01-11 | |||
| JPH04129704A | 1992-04-30 | |||
| JP2020007387A | 2020-01-16 |
Attorney, Agent or Firm:
OGAWA Shinji (JP)
Download PDF: