Waterproof Coating Material of Present Invention

 Various waterproof coating materials have been developed in recent years. They can be applied to concrete, asphalt, foamed polyurethane boards, modified bitumen, and many other roof base materials. The waterproof coating material of present invention is designed to be non-solvent, so that it can be applied in a variety of applications. It can also be prepared as a two-pack curable composition.

The waterproof coating material of present invention can be cured in a constant humidity room for three to four days. In a one-pack curable composition, all formulation components are mixed before application. A curing catalyst is added. The composition is then curable by moisture in the air after application. A curing catalyst may be selected from a group consisting of hydrolyzable ester compounds, ketone solvents, alcohol solvents, and halogenated solvents.

For high-solid type applications, the waterproof coating material of present invention may contain reactive silyl group-containing polyoxyalkylene polymer. The reactive silyl groups can form a siloxane bond and reduce the water absorption rate of the coating film. A reactive silyl group-containing polyoxyalkylene can also be applied as a non-solvent type.



A waterproof coating material of present invention is preferably high solid, has a thickness of 4 to 120 mils, and has a strength of 1.2 MPa or lower. The thickness of the coating film can be achieved by applying it in one application. Generally, waterproof coating materials with component (A) or component (B) have better workability and elongation, while waterproof coating materials with component (B) have lower water absorption rate and lower strength.

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