公开(公告)号：US11927914B2

公开(公告)日：2024-03-12

申请号：US16463070

申请日：2017-12-13

申请人： SANYO CHEMICAL INDUSTRIES, LTD.

发明人： Takuya Koshima

IPC分类号： G03G9/087 ,  C08F220/18 ,  C08F220/68

CPC分类号： G03G9/08706 ,  C08F220/1818 ,  C08F220/68 ,  G03G9/087

摘要： The present invention provides an electrophotographic toner binder containing, as a main component, a polymer whose constituent monomer is a monomer having an ethylenically unsaturated bond, the electrophotographic toner binder being excellent in low-temperature fixability, hot-offset resistance, and storage stability. The present invention provides an electrophotographic toner binder containing a polymer (A) containing a monomer (a) and a monomer (x) different from the monomer (a) as essential constituent monomers, wherein the monomer (a) is a (meth)acrylate having a C18-C36 acyclic hydrocarbon group, the polymer (A) has an acid value of 40 or less, and the polymer (A) satisfies the following relational expression (1):

1.1 (cal/cm3)0.5≤|SP(x)−SP(a)|≤8.0 (cal/cm3)0.5  relational expression (1):

wherein SP(a) is the SP value of a structural unit derived from the monomer (a) constituting the polymer (A); and

SP(x) is the SP value of a structural unit derived from the monomer (x) different from the monomer (a) constituting the polymer (A).