Waterborne Clear Top Coat Emulsion
POLYSOL CAM-91
Introduction.
POLYSOL CAM-91 is a silicone emulsion with excellent resistance to water whiting and staining, making it an excellent choice as an overcoat emulsion for colourful paints and real stone paints.
Applications.
・ Overcoats for colourful paints, real stone paints and other coatings.
・ Other coatings where water resistance is required.
Special features.
・ The best water whiteness resistance of any water-based product.
・ Further improvement in staining resistance.
・ Silicone emulsion with excellent resistance to UV yellowing.
Typical properties.
Appearance Milky white emulsion
Solid content (%) 34.0 to 37.0
Viscosity (mPa.s) 200 or less
pH 8.0 to 9.5
Minimum film-forming temperature (℃) 0 or less
Ionicity Anionic
Tg (℃) 25
High Temperature Stability 60°C, 7 days Good
Determination conditions: solid content (105℃×1hr), viscosity (23℃, BM type viscometer, 60rpm), high temperature stability (60℃×7days), low temperature stability (-3℃, 3 times), mechanical stability (15kg, 10min)
1. Measurement of paint properties
1-1 Water Whitening Resistance
(Coating conditions and drying conditions of overcoat)
The emulsion is applied at 200gr (wet)/m2 to the colourful paint and dried at 20°C and 65% RH for 3 days.
(Water resistance test conditions)
The test body is dipped in water and the whitening state is observed after a period of time.
(Evaluation method and test results)
＜Evaluation method
◎; No whitening at all ○; Slightly greenish in the concave area
△; full greening ×; full whitening
＜Test results
Water impregnation
After 1 day, after 3 days, after 5 days, after 7 days
POLYSOL CAM-91 ◎ ◎～○ ○ ○～△
POLYSOL 4710 CS-12: 4% added ○ △ × × ×
1-2 UV yellowing resistance test results
(Coating conditions and drying conditions of top coat)
(UV yellowing resistance test conditions)
The test body was irradiated with a UV lamp at a distance of 2.5cm for 48 hours. Evaluate visually the degree of yellowing.
(Test results)
/ UV yellowing resistance
POLYSOL CAM-91 ◎ (no yellowing at all)
POLYSOL 4710 CS-12:4% added △ (slight yellowing)
