● Brief
PVC Defoamer is a metal soap Defoamer , widely used in latex, lotion and water-based coatings.
Technical data:
Appearance: translucent colorless - light yellow viscous liquid
Active matter: 100%
Specific gravity: 0.85 g / ml
Ionicity: non-ion
Water solubility: dispersed in water
Advantages
☉PVC Defoamer is particularly suitable for medium viscosity, PVC in the range of 20% -60% Water-based latex system.
☉PVC Defoamer emulsion paint coating does not appear oil shrinkage, the amount of 0.35% when the overall effect of the best open cans.
☉ little effect on the film, high efficiency, spectrum.
● Application
High viscosity
Recommended dosage is 0.5-0.8% of the total formulation. The recommended dosage is 0.03-0.5% of the total formulation.
Low viscosity
Recommended dosage is 0.1-0.3% of total formulation
Usage and dosage:
☉PVC Defoamer can be added to the original form of paint.
☉PVC Defoamer grinding stage to add 40% of the quality, paint the stage (before adding the emulsion) to add the remaining 60%.
☉ the first time the use of the product by adding the minimum amount until the good results so far.
☉ Before use, stir or shake evenly. (The storage process does not affect the use of stratification efficiency)
● Packaging and storage and transportation
No frost, 40 degrees below, 12 months, 15KG iron drum or 20KG, 170KG plastic drum packaging.
Specific gravity Cup method:
Preparation of non- Defoamer 's emulsion paint sample, the viscosity is about 90KU, each test sample 200g, adding 0.3% by weight Defoamer , constant speed stirring for some time, measured density value. Density greater the greater the degree of defoaming ability The
Defoaming ability:
Density 1 --- stirring speed 3000rpm, stirring time 180 seconds, immediately measured;
Density 2 --- after high-speed mixing, measured after 15 minutes;
Defoaming persistence
Density 3 --- paint samples stored at 50 degrees for 15 days, stirring speed 3000rpm, stirring time 180 seconds, immediately measured;
Performance state
In the construction of the same primer asbestos substrate, respectively, the construction of the coating, observe the wet film surface bubble burst speed, dry film is needle, shrinkage, recording time and details.
Apparent evaluation
100 - smooth performance, no needle, shrinkage and other defects, gloss does not affect;
80 - smooth performance, a small number of eye drops or shrinkage and other defects, a slight impact of gloss;
60 - the performance of some needle eye, shrinkage and other defects, greater impact of gloss;
0 - the performance of full board needle or shrink hole, fog large