Detail of "3337-59-5"

Reference

Thermally stable, rigid polyesters from aromatic dibasic acids and thermally stable, rigid bisphenols

Thermally stable, rigid polyesters from aromatic dibasic acids and thermally stable, rigid bisphenols. Frazer, August Henry (du Pont de Nemours, E. I., and Co., USA). U.S. US 4065432 27 Dec 1977, 11 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C08G063-18. NCL: 260047000C. APPLICATION: US 76-751088 16 Dec 1976. DOCUMENT TYPE: Patent CA Section: 39 (Textiles) Section cross-reference(s): 25 Rigid chlorobisphenols were prepd. and polymd. with dicarboxylic acids to give heat-resistant polyester fibers. Thus, 2,2-bis[(4-acetoxy-3,5-dichlorophenyl)carbonyloxymethyl]propane (I) [65758-05-6] was polymd. with terephthalic acid under N for 18 h at 275°, 5.5 h at 305°, and 2 h at 305°/<0.05 mm Hg to give the polyester II [65764-62-7] m. 320°, that could be manually spun into fiber at ~270° and that had inherent viscosity 0.43 dL/g (0.5 g/dL at 30° in syn-C2H2Cl4-PhOH). I was prepd. by acetylation of the resp. diol [65758-16-9] precursor which was prepd.Except for chemicals metioned above, 65789-55-1 is also used. by reaction of 2,2-dimethyl-1,3-propanediol [126-30-7] with Me 3,5-dichloro-4-hydroxybenzoate [3337-59-5]. .