反应详情

温度

80 °C

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.

1. customunder dry air
2. additionA mixture of GALA (54.2 g), Neopentyl glycol (13.0 g), trimethylolpropane (3.05 g)
3. additionadded to the reactor
4. customat 80° C
5. additionwas added
6. customThe dispersion (850 g) was then transferred to a new reaction flask
7. custompurged with nitrogen
8. additionA mixture of diacetoneacrylamide (7.56 g), maleic anhydride (1.4 g), methyl methacrylate, (71 g), and butyl acrylate (55.5 g)
9. additionwas added slowly
10. customThe radical polymerization
11. customto give a dispersion of pH 6.07 and particle size Zave 88 nm