抄録
Films were prepared by heat treatment of metals, the surfaces of which were covered with aqueous solution of methylated methylol melamine containing various amounts of phosphoric acid. Then, the structure and reaction mechanism of the said films were investigated by infrared analysis, elementary analysis, and X-ray diffraction.
The results obtained were as follows:
(1) When the addition amount of phosphoric acid was 0.5-1.5% by weight against methylated methylol meramine, the condensation occurred by the following formulas (i) and (ii).
>N-CH2OH+HOCH2-N<→>N-CH2-N<+H2O+CH2O……(i)
>N-CH2OCH3+HOCH2-N<→>N-CH2-N<+CH3OH+CH2O……(ii)
(2) When the addition amount of phosphoric acid was less than 0.5%, the reaction did not completely proceed.
(3) When the addition amount of phosphoric acid was more than 1.5%, -CH2OCH3 was decomposed to damage the flexibility of the said films.
