RADICAL POLYMERIZATION METHOD APPLIED FOR HALOGENATED POLYMERS, HALOGENATED POLYMERS AND THEIR PRODUCTS Russian patent published in 2008 - IPC C08F2/00 C08F14/06 C08F14/08 C08F8/22 C08F293/00 

FIELD: chemistry.

SUBSTANCE: invention refers to radical polymerization method of halogenated polymers production. Radical polymerization method is applied for halogenated polymers production. Besides radical polymerization method is used for polymer production of chlorinated vinyl monomer(s). Method implies usage of (A) one or more ethylene non-saturated monomers at least one of which is selected from chlorinated vinyl monomers group, (B) molecular iodine and (C) one or more radical generating agents selected from diazo-compounds, peroxides and dialkyldiphenylalkans. Method includes stages according to which at least a part of each compound (A), (B) and (C) are placed into reactor. Then reactor content interacts as optional residue of each compound (A), (B) and (C) is added until at most 70 moles % chlorinated vinyl monomer(s) placed into reactor react(s), if ethylene non-saturated monomer or monomers placed into reactor are exclusively chlorinated vinyl monomer(s), or until at most 95 moles % chlorinated vinyl monomer(s) placed into reactor react(s), if at least one ethylene non-saturated monomer placed into reactor is non-halogenated monomer. Then reaction is carried through. This method is used for production of polymer with number-average molecular weight M_n more than 1,0x10⁴ and ratio M_z/M_w lower than 1.65. Radical polymerization method is applied for block-interpolymer production at least one block of which is polymer block of chlorinated vinyl monomer(s) containing (A') one or more ethylene non-saturated monomers and (B') one or more polymers of chlorinated vinyl monomer(s) selected from polymers produced by stated method and intermediate block-interpolymer. Block-interpolymer characterized with number-average molecular weight M_n more than 1.5x10 and polydispersity ratio M_w/M_n lower than 1.60. Product is made of one or more specified chlorinated vinyl monomer(s) and block-interpolymer. It is possible to reactivate polymer chain growth from chlorinated vinyl monomer(s) by additional mutual reaction, even after release from polymerization medium that makes possible to produce block-interpolymers containing at least one polymer block of chlorinated vinyl monomer(s). Products based on specified polymers have improved mechanical properties.

EFFECT: method enables to synthesize polymers from chlorinated vinyl monomer.

18 cl, 2 tbl, 8 ex