PEROXIDE DOSING IN SUSPENSION METHOD ACCORDING TO WHICH STEROL IS POLYMERISED Russian patent published in 2009 - IPC C08F2/18 C08F12/08 C08J9/00 C08F4/32 

FIELD: chemistry.

SUBSTANCE: described is method of suspension polymerisation, mainly excluding application of vinyl chloride for polymerisation of sterol monomer or sterol-containing monomer mixture, which includes stage of continuous or semi-continuous dosing into reaction mixture at temperature of polymerisation of initiator, selected from group consisting of peroxydicarbonates, peroxicarbonates, peroxiesters, peroxiketals, diacetyl peroxides, dialkyl peroxides, azo-initiators, ketone peroxides, where said initiators can be functionalised, and their mixtures, starting from time moment, at which no monomer quantity is polymerised, up to the moment, when at least 70% of all monomer is polymerised, where at said temperature of polymerisation at least one initiator, which is dosed, has period of half-life equal from 0.5 to 60 minutes.

EFFECT: obtaining polymer at improved regulation with molecular weight and molecular-weight distribution, requiring shorter polymerisation time.

11 cl, 3 tbl, 11 ex