C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/76 (2006.01) C08G 18/08 (2006.01) C08G 18/38 (2006.01) C08G 18/62 (2006.01) C09D 5/02 (2006.01) C09D 175/04 (2006.01)
Patent
CA 2431815
A water dispersible polyurethane dispersion suitable for use as a curable film- forming composition is provided wherein the dispersion comprises, in water, the reaction product of (i) an acrylic polyol having hydrophilic groups, (ii) a polyol hydrosilylation reaction product of an alkylpolysiloxane and an unsaturated hydroxyalkyl compound, and (iii) a polyisocyanate component. Preferably, the acrylic polyol comprises a copolymer containing aromatic groups and having a glass transition temperature of at least about 0~C.
L'invention concerne une dispersion en polyuréthane dispersible dans l'eau, qui convient comme composition feuillogène durcissable. La dispersion comprend, dans de l'eau, le produit de réaction: i) d'un polyol acrylique présentant des groupes hydrophiles; ii) d'un produit de réaction d'hydrosilylation au polyol d'un alkylpolysiloxane et d'un composé hydroxyalkyle insaturé; et iii) d'un constituant polyisocyanate. De préférence, le polyol acrylique comprend un copolymère contenant des groupes aromatiques et présentant une température de transition vitreuse d'au moins environ 0 ·C.
Klanica Joseph A.
Rearick Brian K.
Borden Ladner Gervais Llp
Ppg Industries Ohio Inc.
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