Superb Durability on Glass C-515.72HR ( 0.35%, 2740* hours)
A study was conducted looking at various Chartwell products in WB Acrylic DAP glass sealant. The sealant was applied to bond 2 clean glass microscope slides with a 1 inch overlap.
After 72 hours of drying, the bonded slides were placed in water at ambient temperature. Time to failure (separation) is as follows:
CONTROL |
< 24 hrs |
B-515.71W |
48 hrs, 0.35% |
C-515.72HRW |
288 hrs @ 0.35%
96 hrs @0/70% |
B-519.71W (new product) |
72 hrs @ 0.35, 0.70% |
| C-515.72HR |
2740* hrs @ 0.35% (*no failure yet!)
96 hrs @ 0.70, 1.00 % |
|
Water-Borne Solid Stain Applied
to Exterior Deck After 6 months exposure
Adhesion of Polyester
Baking Enamel on CRS
Conclusions:
1. Without adhesion promoter
(control>50% of coating removed
2. Addition of D-525.31 to the
graind stage sharply reduces coating removal as follows:
| Control |
50% |
| 2phr |
<1% |
| 3phr |
0% |
3. Excellent humidity and salt-fog resistance
|