Silicone-Containing Polyesters, Coating Compositions Containing the Same, and Coatings Formed Therefrom

Abstract

A silicone-containing polyester polyol can include a reaction product prepared from reactants including: a diol; a polyol having at least three hydroxyl groups; a dimer of a fatty acid having two carboxylic acid groups, or an anhydride or ester thereof; and a silicone component having siloxane linkages and at least two reactive functional groups selected from hydroxyl groups, amino groups, thiol groups, carboxylic acid groups, anhydride groups, or combinations thereof. A coating composition for preparing an anti-fingerprinting, soft touch coating can include the silicone-containing polyester polyol and a crosslinker reactive with the silicone-containing polyester polyol.

The invention claimed is: 
     
         1 . A coating composition, comprising:
 (a) a silicone-containing polyester polyol comprising a reaction product prepared from reactants comprising:
 (i) a diol; 
 (ii) a polyol comprising at least three hydroxyl groups; 
 (iii) a dimer of a fatty acid comprising two carboxylic acid groups, or an anhydride or ester thereof; and 
 (iv) a silicone component comprising siloxane linkages and at least two reactive functional groups selected from hydroxyl groups, phenolic groups, amino groups, thiol groups, carboxylic acid groups, anhydride groups, or combinations thereof; and 
   (b) a crosslinker reactive with the silicone-containing polyester polyol, wherein the crosslinker comprises a phenolic resin, an epoxy resin, a beta-hydroxy (alkyl) amide resin, an alkylated carbamate resin, an isocyanate, a polyacid, an anhydride, an organometallic acid-functional material, a polyamine, a polyamide, an aminoplast, and/or a combination thereof.   
     
     
         2 . The coating composition of  claim 1 , wherein the crosslinker comprises blocked isocyanate groups, epoxide groups, acids groups, anhydride groups, amino groups, amide groups, aminoplast-based compounds, and/or combinations thereof. 
     
     
         3 . The coating composition of  claim 1 , wherein the crosslinker comprises a polyisocyanate. 
     
     
         4 . The coating composition of  claim 1 , wherein the crosslinker comprises an aminoplast. 
     
     
         5 . The coating composition of  claim 1 , wherein the coating composition comprises from 15 to 60 weight % of the crosslinker, based on the total solids weight of the coating composition. 
     
     
         6 . The coating composition of  claim 1 , further comprising an ultraviolet light absorber and/or stabilizer. 
     
     
         7 . The coating composition of  claim 1 , further comprising a second silicone component different from the silicone component used to prepare the silicone-containing polyester polyol, wherein the second silicone component comprises at least one reactive functional group reactive with the crosslinker. 
     
     
         8 . The coating composition of  claim 7 , wherein the second silicone component comprises a hydroxyl-functional silicone-containing polyacrylate. 
     
     
         9 . The coating composition of  claim 7 , wherein the second silicone component comprises a polymer comprising a side chain comprising alternating silicon and oxygen atoms. 
     
     
         10 . The coating composition of  claim 1 , further comprising a non-aqueous solvent. 
     
     
         11 . The coating composition of  claim 1 , wherein the silicone component comprises at least two hydroxyl groups. 
     
     
         12 . The coating composition of  claim 1 , wherein the silicone component comprises a hydroxyl group and a carboxylic acid group. 
     
     
         13 . The coating composition of  claim 1 , wherein the silicone-containing polyester polyol has a weight average molecular weight of from 2,500 to 5,000 g/mol. 
     
     
         14 . The coating composition of  claim 1 , wherein the silicone-containing polyester polyol has a hydroxyl value of from 100 to 250 mg KOH/g. 
     
     
         15 . An automotive substrate at least partially coated with a coating composition comprising:
 (a) a silicone-containing polyester polyol comprising a reaction product prepared from reactants comprising:
 (i) a diol; 
 (ii) a polyol comprising at least three hydroxyl groups; 
 (iii) a dimer of a fatty acid comprising two carboxylic acid groups, or an anhydride or ester thereof; and 
 (iv) a silicone component comprising siloxane linkages and at least two reactive functional groups selected from hydroxyl groups, phenolic groups, amino groups, thiol groups, carboxylic acid groups, anhydride groups, or combinations thereof; and 
   (b) a crosslinker reactive with the silicone-containing polyester polyol.   
     
     
         16 . The automotive substrate of  claim 15 , wherein the automotive substrate comprises a metallic substrate comprising tin, steel, aluminum, aluminum alloy, zinc-aluminum alloy, steel coated with zinc-aluminum alloy, and/or aluminum plated steel. 
     
     
         17 . The automotive substrate of  claim 15 , wherein the automotive substrate comprises a non-metallic substrate comprising a polymeric and/or textile material. 
     
     
         18 . The automotive substrate of  claim 15 , wherein the crosslinker comprises a phenolic resin, an epoxy resin, a beta-hydroxy (alkyl) amide resin, an alkylated carbamate resin, an isocyanate, a polyacid, an anhydride, an organometallic acid-functional material, a polyamine, a polyamide, an aminoplasts, and/or a combination thereof. 
     
     
         19 . The automotive substrate of  claim 18 , wherein the crosslinker comprises a polyisocyanate. 
     
     
         20 . The automotive substrate of  claim 15 , further comprising:
 a primer layer arranged over at least a portion of the automotive substrate, wherein the primer layer is formed from a primer composition; and   a basecoat layer arranged over a at least a portion of the primer layer, wherein the basecoat layer is formed from a basecoat composition, wherein the basecoat composition comprises a pigment,   wherein the primer composition and/or the basecoat composition comprises the coating composition.