Photopolymerizable and thermally polymerizable compositions
US4299938A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1980 |
| Grant date | Nov 10, 1981 |
| Priority date | — |
| Expiry date | Jun 9, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/029
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Substances (I) capable of being converted into higher-molecular weight materials under the influence of a cationic catalyst, such as 1,2-epoxides, aminoplasts, vinyl monomers or prepolymers, or phenoplasts, are so converted by exposure to actinic irradiation or by heating in the presence of an aryloxysulfoxonium salt of formula ##STR1## where either R.sup.6 and R.sup.7 separately denote lower alkyl (optionally substituted by halogen and interrupted in the chain by --O-- or --SO.sub.2 --), or an aryl or aryloxy group, or R.sup.6 and R.sup.7 together denote a divalent group forming with the S atom a heterocyclic radical; R.sup.8 denotes an aryl group; M denotes an atom of a metal or metalloid; X denotes a halogen atom; and n is 4, 5, or 6, for instance, PA1 p-chlorophenoxy-p-tolyl-p-phenoxysulfoxonium hexafluorophosphate and 1-phenoxy-1-oxidotetrahydrothiophenium tetrafluorborate. When I is an epoxide resin or a resol resin, it may be photopolymerized by means of II and subsequently crosslinked with a latent heat-curing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.