New thiuram disulfide, their preparation and their use in the polymerization of vinyl monomers

摘要

PCT No. PCT/FR89/00172 Sec. 371 Date Dec. 3, 1990 Sec. 102(e) Date Dec. 3, 1990 PCT Filed Apr. 17, 1989 PCT Pub. No. WO89/10371 PCT Pub. Date Nov. 2, 1989.This compound (I) is prepared by reaction of a compound (II) with carbon disulphide in the presence of an oxidizing agent. It can be used as an agent performing the triple function of initiator, chain transfer agent and termination agent in the radical polymerization of vinyl monomers. The alpha , omega -difunctional vinyl oligomers and polymers thus obtained are fireproofing polymers or polymers which can be employed as additives in the preparation of fireproofing polymers. They can also be employed to manufacture block polymers by condensation of their end functional groups in the presence of at least one other functional oligomer or polymer, these block polymers also being fireproofing polymers. IMAGE (I) IMAGE R1, R2=especially C1-C12 alkyl optionally interrupted by -0-or, IMAGE cycloalkyl, aryl, -Y-R4 (Y=single bond, -0- or -NR5); R4=phosphate or phosphonate functional group; at least one of R1 and R2 consisting of or carrying at least one phosphate or phosphonate functional group.