Toner and method for production thereof
 This invention discloses a toner characterized by the toner particles thereof severally possessing a sea-island-lake structure wherein a crystalline (meth)acrylic ester type polymer is present in the form of a plurality of domains in a matrix of a binder resin and a portion of the binder resin is present in the form of a plurality of domains in each of the domains of the polymer. The melt viscosity of the crystalline (meth)acrylic ester type polymer is not less than 50 cPs at 140.degree. C. The toner combines an ability to resist the phenomenon of offset with ideal particle flowability, stability of storage, and charging characteristics. 
Nippon Shokubai, Co., Ltd.
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G03G G03G
inventional inventional
Yoshikuni Mitsuo
Mori Kushino