摘要:
The object of the present invention is to produce a polymer, which is free from the troubles of the coloration and the decrease in the mechanical properties of molded articles (films, etc.), crosslinkage failure, migration (stain) or the like, by the living radical polymerization method wherein the content of impurities consisting of a transition metal and its ligand employed as a polymerization activator is reduced. A process for producing a polymer is described, comprising: a) the step of performing a polymerization reaction by using a monomer, a transition metal and its ligand and a polymerization initiator to form a polymer; and b) the step of eliminating the transition metal and its ligand contained in the polymer under the condition of a viscosity of 100 Pa.s or below, wherein the step b comprises: bl) the former step of eliminating the transition metal and its ligand insoluble in the polymer; and b2) the latter step of eliminating the transition metal and its ligand dissolved in the polymer.
摘要:
PROBLEM TO BE SOLVED: To solve the problem that production capacity is reduced due to reduction in usage efficiency of a polymerization vessel since cooling is performed and a solvent is added to a reaction system for stopping polymerization in a step of producing a (meth)acrylic copolymer. SOLUTION: There is disclosed a method for producing a radical polymer, wherein in a step of producing a (meth)acrylic block copolymer (a) comprising a methacrylic polymer block (A) consisting essentially of a methacrylate and an acrylic polymer block (B) consisting essentially of an acrylate by living radical polymerization using a transition metal complex catalyst, polymerization is stopped by adding an organic sulfonic acid. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
The present invention is directed to energy-efficient, photoinitiators having the general formula:wherein Z each independently representwherein R1, R2, R3, R4, R5, R6, R7, R8 are as defined in claim 1, and wherein R9 represents (R10)2O or (R10)3N; wherein R10 represents H or an alkyl group having from one to eight carbon atoms; and wherein R11 represents H, an alkyl group having from one to eight carbon atoms, a benzyl group or an aralkyl group. The present invention is also directed to a method of generating a reactive species, methods of polymerizing polymerizable materials, methods of curing an unsaturated oligomer/monomer mixture, and methods of laminating using the photoinitiators of the present invention. In addition, the present invention is directed to ink compositions, adhesive compositions and resins, and methods of printing using the above-described photoinitiators.