| 配方類型： |
MISCELLANEOUS |
| 配方說明： |
Resin Emulsion |
| 配方組成： |
Solvent/10.00
Step 3
Water/43.20
Ammonium Caseinate* Soln. (10% solids)/-
Resin/40.00
Oleic Acid/0.65
Solvent/10.00
Oleic Acid/0.25
Resin/40.00
Potassium Hydroxide Soln. (2.5%)/6.15
Potassium Hydroxide Soln. (2.5%)/6.15
Water/24.50
Ammonium Caseinate* Soln. (10% solids)/15.00
* When a long shelf is required, a preservative for the caseinate (such
as "Dowicide" G" is added. |
| 配制方法： |
Step 1: Dissolve resin and oleic acid in solvent. For optimum particle size, the solution should have a viscosity of 25-35 poises.
Since this range is very critical, with a particular combination of resin and solvent it may be necessary to adjust the resin or solvent proportions given in the table.
Step 2: Slowly add the potassium hydroxide solution (2.5%) to the resin solution with stirring to obtain a homogeneous dispersion. This is a critical step, results depending on rate of addition of the alkali, degree of agitation, and temperature. Optimum cOnditions are determined through trial.
Step 3: Next add ammonium caseinate (if used) and disperse thoroughly.
Then add sufficient water to the emulsion, with continued agitation, to obtain a 40% solids emulsion. The resin emulsion is now ready for compounding with a latex to produce an emulsion adhesive.
Several guide lines are useful in the preparation of the resin emulsions discussed above. The pH of resin emulsions should be mildly alk |
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