Anchored polysiloxane-modified polyurethane coatings and uses thereof
First Claim
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1. A polymeric material formed from reactants which comprise:
- polyorganosiloxane having two or more reactive functional groups attached to only a single end of the polyorganosiloxane;
wherein the reactive functional groups are hydroxyl alkyl carbamate groups or amino groups;
wherein the polyorganosiloxane constitutes about 5 to 30 wt. % (on a solids basis) of the total weight of the reactants;
about 30 wt. % to 85 wt. % polyisocyanate (on a solids basis) of the total weight of the reactants; and
polyol.
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Abstract
A polymeric material, prepared by reacting a mixture comprising a polyorganosiloxane having one or more isocyanate-reactive functional groups, polyisocyanate, and polyol, is provided. The isocyanate-reactive functional groups, typically one or two, are attached to only a single end of the polyorganosiloxane chains. The polymeric material may be used to form coatings on a substrate and to inhibit fouling on surfaces exposed to aqueous conditions.
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23 Claims
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1. A polymeric material formed from reactants which comprise:
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polyorganosiloxane having two or more reactive functional groups attached to only a single end of the polyorganosiloxane;
wherein the reactive functional groups are hydroxyl alkyl carbamate groups or amino groups;
wherein the polyorganosiloxane constitutes about 5 to 30 wt. % (on a solids basis) of the total weight of the reactants;about 30 wt. % to 85 wt. % polyisocyanate (on a solids basis) of the total weight of the reactants; and polyol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A polymeric material formed from reactants which comprise:
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amino functional polyorganosiloxane having one or more amino groups attached to only a single end of the polymer chain, wherein the amino functional polyorganosiloxane constitutes about 5 to 30 wt. % (on a solids basis) of the total weight of the reactants; polyisocyanate, which constitutes about 30 wt. % to 85 wt. % (on a solids basis) of the total weight of the reactants; and polyol; wherein the polymeric material has an initial water contact angle of at least about 100°
. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification