Formaldehyde → Benzene, ethenyl-, polymer with 1,3-butadiene

Participants

Reaction Steps

14.7 kg of Latex A-1 and 2.5 kg of deionized water are charged into a 40 l reactor equipped with a stirrer, heating and cooling apparatus, and a raw material supplying tube. Then, 72 g of acetic anhydride and 1.4 kg of deionized water are added and mixed at 40° C. After stirring and mixing for about 1 minute, the mixture is allowed to stand for 10 minutes. Then, 30 g of the sodium salt of a condensate of beta-naphthalene sulfonic acid and formaldehyde; 110 g of potassium hydroxide (48%) and 880 g of deionized water are added, while stirring. A butadiene/styrene copolymer rubber latex with an average particle size of 0.25 μm is obtained. The pH of this latex is 7.5 and the solid content is 29.1%.

Provenance & Evidence