Reference

Photocurable compositions

Photocurable compositions. (Asahi Chemical Industry Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58204013 A2 28 Nov 1983 Showa, 4 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08F299-00; C08F002-48. APPLICATION: JP 82-87300 25 May 1982. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Photocurable compns. contain photopolymerizable unsatd. compds. and a photopolymn. initiator compn. comprising [A] 31 photoinitiator exhibiting high photosensitivity but low surface curing, [B] 31 photoinitiator exhibiting low photosensitivity but high surface curing, and [C] 31 photoinitiator which can compensate for defects of A and B and is effective in controlling the properties of the cured product. Thus, a substrate was coated with a compn. contg. SP1509 (bisphenol A epoxy resin acrylate), trimethylolpropane triacrylate, 2-hydroxyethyl acrylate, and a photopolymn. initiator compn. of benzil dimethoxy ketal [91234-65-0], 2-ethylanthraquinone [84-51-5], and 1-chloroanthraquinone [82-44-0]. The mixt. was irradiated with UV light to give an excellent photocured polymer [91264-52-7].

Photosensitive coating materials

Photosensitive coating materials. (Asahi Chemical Industry Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58204060 A2 28 Nov 1983 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C09D005-00. ICA: C08F002-48; C08F299-02; C08F299-06. APPLICATION: JP 82-87298 25 May 1982. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Section cross-reference(s): 56, 74 Photosensitive coating materials contain (1) a photocurable component composed of (a) an epoxy (meth)acrylate prepolymer or a (meth)acrylic acid ester prepolymer having ethylenic unsatd. moieties on both ends, (b) a urethane acrylate prepolymer, and (c) a monomer contg. ethylenically unsatd. moieties; (2) 0.2-10 wt.% (based on the photocurable component) of a photopolymn. initiator; (3) 0.1-3 wt.% unsatd. silane (4) 0.2-5 wt.% unsatd. phosphate ester; and (5) 1-30 wt.% 2,4-diamino-6-phenyl-1,3,5-triazine (I). The coating materials show good adhesion to metals, anticorrosion characteristics, high resistance to chem. and heat, and are useful as photosensitive paints and inks. Thus, a bisphenol A epoxy acrylate (SP 1509), tetramethylolmethane triacrylate, Bu2Sn dilaurate, and tolylene diisocyanate reacted to give a urethane acrylate prepolymer (II). A Cu foil was coated with a compn. contg. SP 1509, II, trimethylolpropane triacrylate, 2-hydroxyethyl methacrylate, Irgacure 651 [24650-42-8], 1-chloroanthraquinone [82-44-0], 2-ethylanthraquinone [84-51-5], mono(2-methacryloyloxyethyl) phosphate, I, (3-methacryloyloxypropyl)trimethoxysilane, phthalocyanine green, and talc to give a photosensitive plate, which was exposed to light to cure the layer.