Patent ID: 7157520
Filing Date: 2007-01-02
Classification: C08F,C08L,Y10S,Y10T

Abstract:
1. A process for producing a powdery linear polymer, comprising: a step of forming a latex (A) of a multilayer polymer having a multilayer structure comprising a linear polymer (S) having a glass transition temperature below 40.degree. C. and a linear polymer (H) having a higher glass transition temperature disposed in totally at least two layers and containing 35–75 wt. %, as a whole, of the linear polymer (S) with the proviso that the linear polymer (S) cannot be contained in excess of 30 wt. % in an outermost layer of the multilayer structure, a moderate coagulation step of adding a coagulant to the latex (A) to coagulate 70–98 wt. % of the multilayer polymer, and a further coagulation step of further adding a coagulant to the latex to complete the coagulation of the multilayer polymer.