Document Type and Number:
Japanese Patent JPS5015258
Kind Code:
B1
Abstract:
1306538 Bis-cyclic sulphites and carbonates E I DU PONT DE NEMOURS & CO 25 March 1970 [26 March 1969] 14450/70 Heading C2C [Also in Division C3] Novel compounds of the formula in which x is 0 or 1,W is a divalent aliphatic or aromatic radical, oxygen, sulphur, or the group -A-Y-B-, where A and B are C 1-6 alkylene or arylene radicals and Y is oxygen or sulphur, R 1 and R 2 are C 1-4 alkyl optionally substituted by F, Cl or Br and R 3-8 are hydrogen, halogen or C 1-4 alkyl and Z is either sulphur or carbon are prepared by reacting a bis-phenol of the formula with at least 2 moles of a ketone R 1 COR 2 in the presence of a Friedel-Crafts catalyst and condensing the resultant bis-(o-hydroxy benzyl alcohol) with phosgene or thionyl chloride to obtain the cyclic carbonate or sulphite. Examples describe the preparation of sulphites in which W is isopropylidene and R 1 and R 2 are trifluoromethyl. The compounds decompose on heating to form unstable bis-benzoquinone methides which react with compounds having at least two reactive sites per molecule. In Example 10 the bis-sulphite ester of 3,31 - isopropylidene bis - [6 - hydroxy - α,α - bis- (trifluoromethyl) benzyl alcohol] is heated with an equimolecular amount of (A) 1,4-butanedithiol (Product mol. weight about 1240) (B) adipic acid (Product mol. weight about 2760) and (C) the dihydrazide of adipic acid. Similarly these compounds may be decomposed and reacted on heating with organic polymers to produce chain-extended or cured polymers (see Division C3).
Application Number:
JP1879570A
Publication Date:
June 03, 1975
Filing Date:
March 06, 1970
Export Citation:
International Classes:
C07C45/56; C07C49/693; C07C50/24; C07D319/08; C07D327/10; C08J3/24; C08K5/1575; C08K5/375; C08K5/45; C08L7/00; C08K5/00; C08L21/00; C08L23/00; C08L33/00; C08L33/02; C08L71/00; C08L101/00; (IPC1-7): C08J3/24; C08K5/15; C08K5/46; C08L23/08; C08L23/16; C08L9/00; C08L11/00