Patent ID: 8911832
Filing Date: 2014-12-16
Classification: C09D

Abstract:
1. A method of mitigating ice build-up on a substrate, comprising applying to the substrate a first curable film-forming composition, wherein the first curable film-forming composition comprises: (a) a polymeric polyol and a polyisocyanate curing agent; or (b) a polysiloxane polymer and a silane curing agent comprising at least two alkoxy and/or acyloxy functional groups; and applying to the first curable film-forming composition a second curable film-forming composition, wherein the second curable film-forming composition comprises: (i) (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) a polysiloxane present in the second curable film-forming composition in an amount sufficient to mitigate ice build-up on the substrate when subjected to conditions conducive to ice formation; or (ii) a polysiloxane polymer and a silane curing agent comprising at least two alkoxy and/or acyloxy functional groups; wherein upon application of the curable film-forming compositions to the substrate and upon curing, the first curable film-forming composition demonstrates a lower Young's modulus than the second curable film-forming composition, and the coated substrate demonstrates a maximum average load force of 400 N when subjected to ICE ADHESION TEST.