配方类型:

ELASTOMERS, POLYMERS, AND RESINS

配方说明:

配方组成:

B) seed:
ferric sulfate hydrate/0.09 g
monomer blend/30.00 ml
A) reactor precharge:
sodium persulfate (10% sol'n.)/14.40 ml
"discolite" sol'n./4.50 ml
EDTA disodium salt/0.18 g
C) feed 1:
sodium vinyl sulfonate (25% sol,n.)/25.8 ml
"discolite" sol'n./139.5 ml
D) feed 2:
deionized water/93.6 ml
sodium persulfate (10% sol'n)/43.2 ml
sodium acetate/14.4 ml
E) feed 3:
monomer blend
residue of blend I
blend I:
vinyl acetate monomer/662.40 g
butyl acrylate monomer/172.8 g
sodium vinyl sulfonate (25% sol'n.)/3.00 g
deionized water/360 ml
vinyl acetate/butyl acrylate, inexpensive formulation
"surfynol" 104/1.50 g

配制方法:

purge reactor with nitrogen and add part A. deaerate with nitrogen. heat. when temperture reaches 60 C add part B. after 20 min gradually add parts C, D, and E. complete addition of parts C and E in 2 h; complete addition of part D in 2 h, 20 min. when temperature reaches 64 C, remove heat. maintain reactor temperature at 65 C for remainder of addition period and for an additional 40 min. continue stirring until cool to room temperature.
emulsion properties: total solids-55% pH-2.1 (adjust to 5.5 before testing) surface tension-53.9 dynes/cm brookfield visc. (spindle #1)-83 cps @ 30 rpm 71.5 cps @ 60 rpm particle size distrbution, bimodal-major 0.27 μ minor 0.41 μ coagulum/grit-0.05% mechanical stability-passed 1/2 h on hamilton beach blender