| 摘要 |
PURPOSE:To prevent blocking of a toner fixable at low temperature by coating the surface of each specified particle with a specified F-containing silane compound. CONSTITUTION:The surface of each of the heat-fixable core particles A is coated by buring with smaller particles B in a depth not larger than the particle diameter of B, and further the surfaces of the particles B and those of the composite particles consisting of A and B are coated with the F-containing silane compound represented by formula I in which X is 1-6C alkyl containing F; Y is phenylene or SO3; R is H or 1-5C alkyl or alkoxy; (m) is 0-3; and (n) is 0 or 1. A compound of formula II and the like can be used for said compound of formula I. The particles B are made of an organic polymer higher in softening point and smaller in average particle diameter than the particles A, or the particles B have substantially not a softening point. |
