POLYESTER MOULDING AND COATING COMPOSITIONS HARDENING BY ULTRA-VIOLET IRRADIATION

摘要

1,254,231. Coated products. FARBENFABRIKEN BAYER A.G. 11 June; 1969 [11 June, 1968], No. 29542/69. Heading B2E. [Also in Division C3] Substrates e.g. glass plates and wood are coated with a composition comprising an unsaturated polyester, a copolymerisable monomeric compound and as a photosensitizer, a benzoin aryl ether of the formula: in which Ar denotes an aromatic radical and R 1 and R 2 , which may be identical or different, each denote a hydrogen atom. a chlorine atom or a methyl group and the coating is hardened by ultra-violet irradiation. The composition may contain synthetic or glass fibres, silicic acid or talc. A wood substrate may first be coated with a nitrocellulose primer. In Example 4, trimethylolpropanediallyl ether is used in the preparation of the polyester.