Method of mitigating ice build-up on a substrate

摘要

The present invention is directed to a method of mitigating ice build-up on a substrate, such as a wind blade, comprising applying to the substrate curable film-forming compositions comprising isocyanate-functional curing agents, film-forming compositions with functional groups reactive with the isocyanates, and polysiloxanes. The film-forming compositions can be applied directly to the surface of the substrate or onto a primer coat and/or topcoat on the substrate.

主权项

1. A method of mitigating ice build-up on a substrate, comprising applying to the substrate a curable film-forming composition; comprising:
(a) a curing agent comprising isocyanate functional groups; (b) at least one film-forming polymer comprising functional groups reactive with the isocyanate groups in (a); and (c) at least one polysiloxane present in the curable film-forming composition in an amount sufficient to mitigate ice build-up on the substrate when subjected to conditions conducive to ice formation; wherein
(i) the polysiloxane (c) comprises polydimethylsiloxane and comprises at least two hydroxyl and/or amine functional groups, or(ii) the polysiloxane (c) comprises at least one polysiloxane comprising at least one functional group that is reactive with functional groups on at least one other component in the curable film-forming composition and at least one polysiloxane that is not reactive with functional groups on other components in the curable film-forming composition; andwherein after application of the curable film-forming composition to the substrate and upon curing, the coated substrate demonstrates a maximum average load force of 450 N when subjected to ICE ADHESION TEST.