Thiuram disulphides containing phosphate or phosphonate functional groups, their preparation and their use in the manufacture of fireproofing vinyl polymers
US5200545A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1990 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Dec 3, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
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. ##STR1## R.sub.1, R.sub.2 =especially C.sub.1 -C.sub.12 alkyl optionally interrupted by --0--or, ##STR2## cycloalkyl, aryl, --Y--R.sub.4 (Y=single bond, --0-- or --NR.sub.5); R.sub.4 =phosphate or phosphonate functional group; at least one of R.sub.1 and R.sub.2 consisting of or carrying at least one phosphate or phosphonate functional group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.