Detail of "66848-64-4"

Reference

Copolymerizable compositions

Leitheiser, Robert H.; Szwarc, John J. (Freeman Chemical Corp., USA). U.S. US 4078015 7 Mar 1978, 7 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C08G018-67. NCL: 260859000R. APPLICATION: US 73-320685 2 Jan 1973. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic Processes) Photopolymerizable compns.In this study，66848-64-4 is also used. for the prepn. of printing plates contain 10-50 parts of a polymerizable diurethane monomer, CH2:CRCO2CH2CHR1O2CNHZNHCO2R3 (R = H, Me; R1 = H, Me, Et; R3 = a mono-OH radical contg. 1-12 C atoms; Z = a divalent org. moiety contg. 2 NCO groups) and 90-50 parts of a polymerizable polyurethane which is the reaction product of an org. diisocyanate, a b-hydroxyalkyl ester of an acrylic acid, and a polyol. Thus, a resin useful for prepg. excellent printing plates was prepd. by heating dicyclohexylmethane diisocyanate 1260 g at 50° along with Ph3Sb 4.86 and dibutyltin dilaurate 4.86 g, and then adding hydroxyethyl acrylate 541.8 g over 1 h while maintaining the temp. at 50°. Thereafter toluhydroquinone 0.486 g was added, the reaction maintained at 50° for 1 h, then polypropylene glycol 3000 and dibutyltin dilaurate 4.86 g were added along with Dow Corning Antifoam A 3 drops, and the reaction vessel heated to 75° and held for 1 h. After the addn. of MeOH 57 g over 1/2 h, addnl. toluhydroquinone 0.486 g was added and the reaction vessel maintained at 75° for 2.5 h. Thereafter hydroquinone methyl ether 4.86 and 2-ethylanthraquinone 4.86 g dissolved in tetraethylene glycol dimethylacrylate 10.0 g was added to give the final resin compn. .