Castor oil derived hydroxy functional acrylic copolymers for surface coating applications

A polyurethane composition comprising a reaction product of:

• (a) acrylic polyols as solvent borne hydroxy functional acrylic copolymers/resin including an acrylic backbone which is a reaction product consisting of sole hydroxy functional monomer which is selectively anhydride modified castor oil as renewable material solely sourcing hydroxyl value in the range of 40 to about 90 mg KOH/gm and acid number value of maximum up to 15 mg KOH/gm, and
• monomers consisting of alkyl or aryl acrylates, alkyl methacrylates, styrene, derivative of styrene, vinyl/ethylenic type monomers and their derivatives and mixtures thereof free of any —OH functional monomers,
• said acrylic polyol reaction product having said solely sourced hydroxyl value in the range of 40 to about 90 mg KOH/gm and acid number value of maximum up to 15 mg KOH/gm sourced from said sole hydroxy functional monomer of said selectively anhydride modified castor oil for superior gloss retention as compared to gloss retention involving monomers free of any anhydride modification based sourcing of hydroxyl values and additional monomers including —OH functional groups;
• and
• (b) an isocyanate.

Thermoset polymers comprising a reaction product of:

• (a) acrylic polyols as solvent borne hydroxy functional acrylic copolymers/resin including an acrylic backbone which is a reaction product consisting of sole hydroxy functional monomer which is selectively anhydride modified castor oil as renewable material solely sourcing hydroxyl value in the range of 40 to about 90 mg KOH/gm and acid number value of maximum up to 15 mg KOH/gm, and
• monomers consisting of alkyl or aryl acrylates, alkyl methacrylates, styrene, derivative of styrene, vinyl/ethylenic type monomers and their derivatives and mixtures thereof free of any —OH functional monomers,
• said acrylic polyol reaction product having said solely sourced hydroxyl value in the range of 40 to about 90 mg KOH/gm and acid number value of maximum up to 15 mg KOH/gm sourced from said sole hydroxy functional monomer of said selectively anhydride modified castor oil for superior gloss retention as compared to gloss retention involving monomers free of any anhydride modification based sourcing of hydroxyl values and additional monomers including —OH functional groups;
• and
• (b) an amino resin.

A coating composition comprising:

• (a) acrylic polyols as solvent borne hydroxy functional acrylic copolymers/resin including an acrylic backbone which is a reaction product consisting of sole hydroxy functional monomer which is selectively anhydride modified castor oil as renewable material solely sourcing hydroxyl value in the range of 40 to about 90 mg KOH/gm and acid number value of maximum up to 15 mg KOH/gm, and
• monomers consisting of alkyl or aryl acrylates, alkyl methacrylates, styrene, derivative of styrene, vinyl/ethylenic type monomers and their derivatives and mixtures thereof free of any —OH functional monomers,
• said acrylic polyol reaction product having said solely sourced hydroxyl value in the range of 40 to about 90 mg KOH/gm and acid number value of maximum up to 15 mg KOH/gm sourced from said sole hydroxy functional monomer of said selectively anhydride modified castor oil for superior gloss retention as compared to gloss retention involving monomers free of any anhydride modification based sourcing of hydroxyl values and additional monomers involving hydrophilic ionic groups including —OH functional groups;
• (b) Cross linker;
• and
• (c) pigments.