| 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 H or F; R is 1-5C alkyl or the like; (m) is 0-10; and (n) is 3-10. 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 smaller in average particle diameter and higher in softening point than the particles A, or having substantially not a softening point, thus permitting the obtained toner to be prevented from blocking and change of composition in copying, superior in durability, and to be used as a low-temperature fixable toner. |
