Method of mitigating ice build-up on a substrate
AssigneePPG Industries Ohio, Inc.
InventorsBruce A Connelly, Edward Francis Rakiewicz, Davina J Schwartzmiller, Michael Zalich, Scott Joseph Moravek, Jane N. Valenta, Steven R Zawacky
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Abstract
The present invention is directed to a method of mitigating ice build-up on a substrate, comprising applying to the substrate combinations of curable film-forming compositions. The curable film-forming compositions may comprise functional film-forming polymers and curing agents or any of various polysiloxanes and optionally silanes with reactive groups. The film-forming compositions can be applied directly to the surface of the substrate or to a primer coat on the substrate.
Claims22
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.
The method of claim wherein a primer film-forming composition is applied to the substrate prior to the application of the first curable film-forming composition.
A method of mitigating ice build-up on a substrate, comprising applying to the substrate a curable film-forming composition, wherein the curable film-forming composition comprises 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 composition to the substrate and upon curing, the coated substrate demonstrates a maximum average load force of 400 N when subjected to ICE ADHESION TEST.
Dependencies are inferred from the claim text.