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Epoxy resins from substituted benzoic acids–formaldehyde resins
Author(s) -
Tanaka Yoshio,
Kakiuchi Hiroshi
Publication year - 1967
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1967.070110730
Subject(s) - benzoic acid , epichlorohydrin , formaldehyde , epoxy , sulfuric acid , sodium hydroxide , synthetic resin , chemistry , solvent , polymer chemistry , organic chemistry , epoxide , materials science , catalysis
Some polybasic acid derivatives were obtained from substituted benzoic acids such as p ‐ and o ‐toluic acids, and p ‐formaldehyde in concentrated sulfuric acid by a method similar to that of Naokawa et al. The structure of these resinous substituted benzoic acid–formaldehyde materials was determined by a paper chromatography and infrared spectrum analysis, and found to bewhere n = 0–2; R = H, R′, and R″ = H or CH 3 , respectively. New glycidyl‐ester‐type epoxy resins were prepared from these substituted benzoic acid–formaldehyde resins and epichlorohydrin in the presence of sodium hydroxide, using dioxane as a solvent. These resins were considered to have the general structure shown above, where n = 0–2, , and R′ and R″ = H or CH 3 , respectively.