2-Hydroxy,alkoxy,methylolbenzophenone intermediate compounds for the manufacture of improved copolymerizable ultraviolet light absorber compounds
US4302606A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1980 |
| Grant date | Nov 24, 1981 |
| Priority date | — |
| Expiry date | May 23, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C49/84
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to 2-hydroxy,alkoxy,methylolbenzophenone intermediate compounds for the manufacture of copolymerizable ultraviolet light absorber compounds. The intermediates have the formula: ##STR1## where R is alkyl C.sub.1 -C.sub.8, and PA1 n is 1 or 2. The intermediate compounds herein are prepared by converting a 2-hydroxy,alkoxy,benzophenone to the corresponding methylol derivative by a formylation reaction. In the preferred embodiments of the invention, the alkoxy group is methoxy in the 4-position, and methylol is a monomethylol group located at the 3- or 5- position of the phenyl ring containing the hydroxy group. The intermediates of this invention can be transformed into useful copolymerizable ultraviolet light absorber compounds by monoesterification with an .alpha.,.beta.-unsaturated dicarboxylic acid anhydride to produce the corresponding polymerizable half-ester compound, or by esterification with an acryloyl halide to form corresponding acrylate compound. Copolymerization of such compounds with vinyl monomers provide improved ultraviolet light stable copolymers for industrial and commercial applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.