配方类型:

ELASTOMERS, POLYMERS, AND RESINS

配方说明:

配方组成:

vinyl acetate/95.0
water/q.s. 38%
sodium vinyl sulfonate (25.0% aq. sol'n.)/5.0
potassium persulfate/0.6
"abex" 18-S (35% active)/8.2
sodium vinyl sulfonate/vinyl acetate
sodium bisulfite (2% sol'n.)/0.5

配制方法:

purge water for 20 umin with nitrogen. add the "abex" aurfactant and 25% of the vinyl acetate/SVS mixture. purge for another 5 min with nitrohen. heat the reaction mixtuur to 55 C and add the potassium persulfate initiator. allow the potassium persulfate catalyst to mix for a few min and then aaa 10% of the sodium bisulfite activator solution. when the temjperature increases a few degrees, begin the addition of the monomer mixture and activator concurrently. control between 68-72 C for the remainder of the addition period (about 1 h).
heat the latex to 80 C for 1 h. cool to room temperature and filter.
total solids-38.0% brookfield visc. #2, 30 rpm-490 cps