×

Coating compositions capable of producing surfaces with dry-erase properties

  • US 9,376,585 B2
  • Filed: 08/26/2014
  • Issued: 06/28/2016
  • Est. Priority Date: 08/26/2014
  • Status: Active Grant
First Claim
Patent Images

1. A waterborne coating composition comprising:

  • (a) a carboxylic acid functional polyacrylate having a calculated Tg of greater than 50°

    C. that is a reaction product of reactants comprising;

    (a1) at least 50% by weight, based on the total weight of the reactants, of a hardening vinyl aromatic monomer selected from the group consisting of dimethylstyrene, 2,5-dimethylstyrene, 3,4-dimethylstyrene, 3,5-dimethylstyrene, 2-ethylstyrene, α

    -methylstyrene, 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, 4-methoxystyrene and styrene;

    (a2) a plasticizing ethylenically unsaturated monomer that does not include carboxylic acid or hydroxyl groups, the monomer selected from the group consisting of methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, iso-butyl acrylate, n-hexyl acrylate, 2-ethylhexyl acrylate, dodecyl acrylate, n-hexyl methacrylate, n-octyl methacrylate, 2-ethylhexyl methacrylate, decyl methacrylate, dodecyl methacrylate; and

    (a3) a carboxylic-acid functional ethylenically unsaturated monomer selected from the group consisting of acrylic acid, (meth)acrylic acid, maleic acid, maleic anhydride, fumaric acid, crotonic acid, maleic acid monoalkyl esters, fumaric acid monoalkyl esters, itaconic acid and propylacrylic acid; and

    (b) a water-miscible polyaziridine,wherein the coating composition is substantially free of isocyanate functionality; and

    wherein the carboxylic acid groups of the polyacrylate are base-neutralized during or after the reaction.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×