Catalytic synthesis of dimaleates with ammonium ferric sulfate;

A photosensitive prepolymer of butandiol diglycidylether diacrylate was prepared by butandiol diglycidylether and acrylic acid as two main materials,with triphenyl phosphine as the catalyst and p-hydroxyanisole as the inhibitor.

Catalysts for synthesizing dibutyl maleate;

The influence factors such as amount of catalyst,molar ratio of maleic anhydride to n-butanol,and reaction time on the yield of dibutyl maleate were discussed.

The influences of the reaction conditions on the grafting rate of dibutyl maleate(DBM) to black N330 and the grafted black N330 on the physical properties of NR vulcanizate were investigated.

Synthesis of di-n-butul maleate with phosphotungstic acid pure as catalytic;