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Waterproof and sealing material
Polyurethane waterproof coating
Polyurethane waterproof coating for railway bridge
DTPU-405, DTPU-406 polyurethane waterproof coating is a two-component reaction-curing polymer waterproof coating, component A is a polyurethane intermediate obtained by reacting polyether polyol and isocyanate, material B is made of curing agent, thickening A color liquid composed of a filler and a filler. When using, mix the A and B components in a certain proportion, stir evenly, apply on the base surface to be applied, and react to cure into a flexible, tough and durable waterproof coating after several hours.
Technical indicators
Executive standard GB/T 19250-2013
|
project |
Polyurethane coating directly with waterproof membrane |
DTPU-401 |
Polyurethane coating directly with waterproof layer |
DTPU-402 |
|
Tensile strength / MPa ≥ |
3.5 |
4.0 |
6.0 |
7.0 |
|
Elongation at break /% ≥ |
450 |
600 |
450 |
700 |
|
Tear strength / (N / mm) ≥ |
35 |
40 |
35 |
40 |
|
Low temperature bending / oC ≤ |
-35 oCNo crack |
No crack |
-35 oCNo crack |
No crack |
|
Impervious to water (O.3MPa 120min) |
impermeable |
impermeable |
impermeable |
impermeable |
|
Solid content / (%) ≥ |
98 |
98 |
98 |
98 |
|
Dry time / h ≤ |
4 |
4 |
4 |
4 |
|
Dry time / h≤ |
24 |
16 |
24 |
16 |
|
Bond strength / MPa ≥ |
2.5 |
3 |
2.5 |
3 |