Room temperature curable silane-terminated polyurethane...

Details Room temperature curable silane-terminated polyurethane... Room temperature curable silane-terminated polyurethane...

C - Chemistry, Metallurgy

08

L

C08L 75/04 (2006.01) C08G 18/08 (2006.01) C08G 18/12 (2006.01) C08G 18/34 (2006.01) C08G 18/42 (2006.01) C08G 18/48 (2006.01) C08G 18/66 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2149652

2149652 9413723 PCTABS00032 This invention provides aqueous dispersions of externally chain extended polyurethane compositions terminated by hydrolyzable and/or hydrolyzed silyl groups and containing anionic solubilizing or emulsifying groups, particularly carboxyl groups. The invention also provides methods of making both anionically and cationically stabilized polyurethane dispersions. This invention further provides polyurethane dispersions which are substantially organic solvent free (e.g. less than about 7 weight percent organic solvent) which cure to water and solvent resistant, tough, scratch resistant, preferably light stable (non-yellowing) polyurethane films. Such films are particularly useful as coatings for wood substrates, including wood floorings, furniture, and marine surfaces, and also as removable coatings on composition vinyl. The stabilized polyurethane dispersions may also be formulated into chip-resistant coatings.

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