公开(公告)号：US20200172682A1

公开(公告)日：2020-06-04

申请号：US16783210

申请日：2020-02-06

Applicant: JSR Corporation

Inventor： Koichiro TANI ,  Ryota FUNAKI ,  Rikimaru KUWABARA ,  Hiroyuki MORITA ,  Takaomi MATSUMOTO

IPC: C08J3/20 ,  C08F236/10 ,  C08L9/06 ,  C08K3/36 ,  C08K5/3435 ,  C08K5/357 ,  C08K5/18 ,  C08K5/17

Abstract: The present invention has as its object the provision of a production process of a rubber composition containing a modified conjugated diene-based polymer, which can provide a rubber composition in which processability is excellent, and a filling agent, when contained, has favorable dispersibility therein.The production process of a rubber composition according to the present invention includes: a first step of kneading a modified conjugated diene-based polymer that is obtained by polymerizing a monomer containing a conjugated diene compound and has at least one nitrogen-containing functional group selected from the group consisting of a primary amino group, a secondary amino group, a tertiary amino group and groups in which these amino groups have been converted into an onium group, and a basic compound having an acid dissociation constant of 8.0 or more; and a second step of kneading the kneaded product obtained in the first step and a cross-linking agent.

公开(公告)号：US20200339768A1

公开(公告)日：2020-10-29

申请号：US16464486

申请日：2017-11-14

Applicant: JSR CORPORATION

Inventor： Rikimaru KUWABARA ,  Akihiko MORIKAWA ,  Shuugo MAEDA

IPC: C08J5/04 ,  C08L53/02

Abstract: Provided is a composition for a fiber-reinforced resin, for producing a fiber-reinforced resin capable of providing a formed article excellent in mechanical strength (e.g., impact resistance and flexural strength). The composition for a fiber-reinforced resin includes a block polymer (A), and a polymer (B) including at least one functional group selected from the group consisting of an epoxy group, an oxazoline group, and an acid anhydride structure.

公开(公告)号：US20210395500A1

公开(公告)日：2021-12-23

申请号：US17292791

申请日：2019-12-02

Applicant: JSR CORPORATION

Inventor： Rikimaru KUWABARA

IPC: C08L15/00 ,  C08L9/06 ,  C08K5/5445 ,  C08L101/02 ,  C08K3/04 ,  C08K3/36 ,  C08J3/24 ,  C08J3/00 ,  B60C1/00

Abstract: This polymer composition includes: a modified conjugated diene-based polymer having at least one nitrogen-containing functional group selected from the group consisting of a primary amino group, a secondary amino group, a tertiary amino group, a primary amino group having been protected or converted into an onium group, a secondary amino group having been protected or converted into an onium group, and a tertiary amino group having been converted into an onium group; and a functional-group-containing polymer having at least one functional group selected from the group consisting of an epoxy group, an acid anhydride structure, an oxazoline group, a hydroxyl group, a carboxyl group, and a sulfo group.