- Patent Title: METHOD FOR PRODUCING LIQUID DISPERSION OF COMPOSITE RESIN PARTICLES, METHOD FOR PRODUCING PRESSURE-SENSITIVE ADHESIVE, METHOD FOR PRODUCING PRESSURE-RESPONSIVE RESIN, METHOD FOR PRODUCING TONER FOR DEVELOPING ELECTROSTATIC CHARGE IMAGE, AND LIQUID DISPERSION OF COMPOSITE RESIN PARTICLES
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Application No.: US17503529Application Date: 2021-10-18
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Publication No.: US20220306852A1Publication Date: 2022-09-29
- Inventor: Kiyohiro YAMANAKA , Yasunobu KASHIMA , Sumiaki YAMASAKI , Takahiro ISHIZUKA , Satoshi INOUE
- Applicant: FUJIFILM Business Innovation Corp.
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Business Innovation Corp.
- Current Assignee: FUJIFILM Business Innovation Corp.
- Current Assignee Address: JP Tokyo
- Priority: JP2021-050365 20210324
- Main IPC: C08L25/14
- IPC: C08L25/14 ; C08F212/08 ; C09J125/14 ; G03G9/087

Abstract:
A method for producing a liquid dispersion of composite resin particles includes polymerizing a styrene compound and an extra vinyl monomer together to give a styrene resin; polymerizing a (meth)acrylate compound in the presence of the styrene resin to give intermediate resin particles A, which are resin particles containing the styrene resin and a (meth)acrylate resin; polymerizing a styrene compound and an extra vinyl monomer in the presence of intermediate resin particles A to give liquid dispersion B, which is a liquid dispersion containing intermediate resin particles B; and adding a polymerization initiator to liquid dispersion B to give a liquid dispersion containing composite resin particles. In the composite resin particles as a whole, the ratio by mass between the styrene and (meth)acrylate resins is between 80:20 and 20:80. There is a difference of 30° C. or more between the lowest and highest glass transition temperatures of the composite resin particles.
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