| 配方类型： |
ADHESIVES |
| 配方说明： |
Wallpaper Adhesive |
| 配方组成： |
Polyvinyl Acetate Emulsion (55% Solids)/100
Plasticizer/10-50
Clay filler/030
cooked Starch or Dextrine/0-1000
Preservative/1-2
Stabilizer/1-2
Wetting Agent/0-0.2
This gives a neutral product that does not penetrate the paper.
Emulsion adhesives
Resin-emulsion adhesives are emulsions of plasticized resins dispersed
in a water base. They are often extended with starch paste or the like
and thus require the incorporation of a preservative. The resin most
commonly used in emulsion adhesives is polyvinyl acetate. The following
is a typical polyvinyl acetate emulsion-adhesive formula:
Polyvinyl Acetate Adhesiv
Starch/10 kg.
Water/75-100
Defoamer/1-2
Odorant (Masking Agent)/0-1
Urea/5.5 kg.
Water/90 liter
Water/15 liter |
| 配制方法： |
The plasticizers most commonly used in polyvinyl acetate emulsion adhesives are dibutyl phthalate and orthonitrobiphenyl (ONB). Dibutyl phthalate imparts good flexibility and softness with relatively low volatility. ONB is not quite so efficient as dibutyl phthalate as a plasticizer, but is widely used because of its economy as either an extender-plasticizer or as primary plasticizer.
Dimethyl phthalate is used in some cases because of its low cost and as it is a better solvent for bonding to cellulose acetate film or sheeting in making windows in or laminations to paper. Tricresyl phosphate and "Santicizer" 140 are used where flame resistance, oil resistance, and low volatility are desired. "Santicizer" 140 is more efficient than tricresyl phosphate and has better light stability and less odor.
"Santicizer" M-17 is an excellent plasticizer for bonding acetate overlays to paper because of its superior light stability. "Santicizer" 8 imparts good flow and wetting action and has excellent grease resis |
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