Photolytic process for the formation of carbon-containing free radicals and its applications to free radical polymerization in particular
US4668356A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1984 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | Aug 22, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/74
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the formation of carbon-containing free radicals R., which optionally include functional groups, wherein thermal and/or photochemical energy is supplied to a thiocarbonyl-containing ester corresponding to the general formula (I): ##STR1## in which: R denotes a saturated or unsaturated, linear or branched, aliphatic or aromatic, acyclic or alternatively mono- or poly-cyclic or mono- or poly-heterocyclic, carbon-containing radical which in addition can optionally include functional groups; PA0 R' and R" denote, independently of each other, an alkyl, alkenyl, aryl, aralkyl or alkaryl radical, or alternatively form together a 5- or 6-membered nitrogen-containing heterocycle which can also contain an additional heteroatom chosen from nitrogen and sulfur and which can optionally be substituted or fused to at least one other aliphatic or aromatic ring; PA0 R.sub.1 and R.sub.2 denote, independently of each other, a hydrogen atom or a lower alkyl radical, and PA0 n is an integer equal to 0, 1, 2 or 3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.