Hydrogen Peroxide → Methyl Methacrylate

Participants

Reaction Conditions

Reaction Steps

IPDI (262 g) was added to a reaction flask under dry air and heated to 80° C. A mixture of GALA (54.2 g), Neopentyl glycol (13.0 g), trimethylolpropane (3.05 g), a saturated polesterdiol (269 g, 1027 g/mol), methyl methacrylate (178.54 g), and p-methoxyphenol (250 mg) was prepared and added to the reactor to keep the temperature at 80° C. When the isocyanate content was 5.76%, triethylamine (23.0 g) was added and the mixture was added to water (2149 g) with stirring. To the dispersion was added 1,2-ethylene diamine (28.1 g) in water (84 g). The dispersion (850 g) was then transferred to a new reaction flask and purged with nitrogen. A mixture of diacetoneacrylamide (7.56 g), maleic anhydride (1.4 g), methyl methacrylate, (71 g), and butyl acrylate (55.5 g) was added slowly. The radical polymerization was initiated by addition of Fe-EDTA (10.5 g, 5 mM), ascorbic acid (6.3 g, 1%), and t-butylhydroperoxide (105 mg). The reaction mixture was kept at 60° C. for 1 h. Then, hydrogen peroxide was added (9.26 g, 30%) to give a dispersion of pH 6.07 and particle size Zave 88 nm.

Provenance & Evidence