Process for the production of sterically stabilised...

Details Process for the production of sterically stabilised... Process for the production of sterically stabilised...

C - Chemistry, Metallurgy

08

F

400/3004, 400/30

C08F 2/20 (2006.01) C09D 3/727 (1980.01)

Patent

CA 1164130

. 31076 ABSTRACT OF DISCLOSURE A process is described for making sterically stabilised non-aqueous dispersions of composite polymer microparticles, in which (1) monomers including at least one crosslinking monomer are polymerised in an aqueous medium at a temperature at least 10° higher than the glass transition temperature of the polymer to be formed, in the presence of a block or graft copolymer stabilising agent, under conditions such that there is at no time present a separate monomer phase, (2) further monomers, not including any crosslinking monomer, are polymerised in the dis- persion thus obtained, the presence of a separate monomer phase again being avoided, and (3) the microparticles are transferred from the resulting dispersion into a non-aqueous medium which is a solvent for the non-crosslinked-polymer generated in (2). The microparticles are of value for incorporation into coating comp- ositions the main film-forming constituent of which is compatible with the non-crosslinked component of the particles.

366969

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