METHOD FOR PRODUCING COMPOSITE RESIN PARTICLE DISPERSION, METHOD FOR PRODUCING PRESSURE-SENSITIVE ADHESIVE, METHOD FOR PRODUCING PRESSURE-RESPONSIVE RESIN, METHOD FOR PRODUCING TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT, AND COMPOSITE RESIN PARTICLES
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United States of America Patent
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Issued Date -
Dec 21, 2023
app pub date -
Aug 31, 2023
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Mar 24, 2021
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Abstract
A method for producing a composite resin particle dispersion includes: performing polymerization A by polymerizing a styrene compound and a vinyl monomer other than the styrene compound to form a styrene-based resin; performing polymerization B by polymerizing a (meth)acrylic acid ester compound in the presence of the styrene-based resin to form intermediate resin particles containing the styrene-based resin and a (meth)acrylic acid ester-based resin; and performing polymerization C by polymerizing a styrene compound and a vinyl monomer other than the styrene compound in the presence of the intermediate resin particles to form composite resin particles. The mass ratio of the styrene-based resin to the (meth)acrylic acid ester-based resin in the composite resin particles is from 80:20 to 20:80. A difference between the lowest glass transition temperature and the highest glass transition temperature in the composite resin particles is 30° C. or more.
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