SU316689A1 - METHOD OF OBTAINING - Google Patents

Description

The invention relates to a process for the preparation of new derivatives of oxidiarylmethanecarboxylic acids containing epoxy groups, which can be used in the production of polymers and in their modification.

A known method for producing glycidyl

RO-C - By

 I where R is alkyl Ci-Ci. In this case, the reaction is very sensitive to the alkali content due to the presence of ester rpynntii, which easily reacts with the epoxy group, i.e., it does not produce the desired product, but high molecular compounds without epoxy groups. The proposed method avoids the side process

esters of polyatomic alcohols by the interaction of epichlorohydrin with polyatomic phenols in the presence of alkalis.

Offered mixed alkyl (C1-C glycidyl esters of oxydiphenylmethane carboxylic acids are prepared using the following scheme:

-OH + ClCl-CH-0 / OCHHCl-CHgC -NaCl, H2Q OH 4 o-CHg-CH-CHg 0 / The method is that the alkyl effluoride oxydiphenylmethanecarboxylic acids are reacted with epichlorohydride at a temperature not lower than 60 ° С and the distilled carbonic acid is subjected to interaction with the epichlorohydride at a temperature not lower than 60 ° С per nris and heated with n-hydroxycarboxylic acids at a temperature not lower than 60 ° С per nris and heated with n-hydrochloride carboxylic acids at a temperature of not lower than 60 ° C in reduced hydrogen and hydrochloride carboxylic acids at a temperature not lower than 60 ° С per nris and heated with NaHCl 3 taken in an amount of not more than 1.2 mol with respect to the starting esters. An increase in the amount of alkali and heat caused by the saponification of the layers of the snow-ether group and the splitting of the epoxy ring. The desired product is isolated with lime. Example 1. 121 wt. including (0.5 lshl) p-oxpdifeplmetapcarboxylic acid methyl ester with m. Il. 141 ° C is dissolved in 231 wt. h. (2.5 MOL) zpihlorhydrin iri outweighing. 24 wt. Were iodidally added to the i-ray solution. including crystalline P1elochi for 3 hours and stirring a reaction mass of 55–60 ° C. Next, the reaction mass is maintained at this temeture during 1 hour. After the indicated time has elapsed, the mixture obtained is neutralized with acetic acid and the excess epichlorohydria is quenched, the reaction mixture is dissolved in 150–200 wt. of acetone, sodium chloride is filtered off, and acetone is distilled off. Example 2. 121 wt. hours (0.5. iol) methyl ester of o-oxydiphenylmethane carboxylic acid with so pl. dissolved in 231 wt. h (2.5 mol) of epichlorohydrin with stirring and further processing is carried out as in example 1. Obtain 150 ses. including oxymethylcarboxydiphenylmeta4 epo monoglcidyl ether, 9.367o sidic groups, with a chlorine content of about 1% 121 wt. including (0.5 mol) methyl Pc and a me r 3. of the third mixture of isomers of o- and p-oxydiphenylmethanecarboxylic acids with m. pl. 119-131 ° C. Dissolved in 231 wt. including (2.5 mol) eiichlorohydrin with stirring. Next, the treatment according to Example 1 is carried out. The yield of a mixture of isomerooximelcarboxydiphylmethane is 158 wt. h. The content of epoxy groups in the product is 10.6%, chlorine is about 1%. The subject invention method polucheii slshshannyh alkyl (Ci-C) glptsidilovyh oksidifenilmetapkarbopovyh acids esters, wherein the esters alknlovye oksidifsnilmetaikarbopovyh acids 1yudvergayut reacted with epihlorgndriiom at a temperature not higher than 60 ° C in the presence of alkali in an amount taken by a) ie above 1.2 mole relative to the starting esters, with g is next, followed by isolation of the target product by known nriems.