Patent ID: 6458501
Filing Date: 2002-10-01
Classification: C08F,C08L,G03G,Y10S

Abstract:
A process for preparing toner, comprising:(i) preparing a surfactant-free composition comprising monomers and water and no seed polymer; (ii) adding a free radical initiator over the course of at least five minutes to at least a portion of said surfactant-free composition to initiate seed polymerization to form seed polymer without the addition of surfactant, wherein said free radical initiator attaches to said seed polymer, forming ionic, hydrophilic end groups on the seed polymer; (iii) adding additional monomer to the composition formed in (ii) to complete emulsion polymerization thus forming a latex polymer; (iv) aggregating a colorant with the latex polymer; and (v) coalescing or fusing the aggregates to form toner particles.