VAE dispersion for D3 wood adhesives

An adhesive composition comprising an aqueous copolymer dispersion comprising:

• at least one copolymer of at least one vinyl ester of a C1-13 alkanoic acid co-monomer, at least one alpha-olefin co-monomer, and at least one auxiliary co-monomer selected from the group consisting of N-alkylol-containing co-monomers, unsaturated silane co-monomers, glycidyl ether/epoxy co-monomers, cyclic ureido co-monomers, acrylamido glycolic acid co-monomers, and combinations thereof;
• and
• at least one stabilizer selected from the group of polyvinyl alcohols, wherein the group of polyvinyl alcohols comprise a first group of polyvinyl alcohols having a degree of hydrolysis greater than 90 mol % and a second group of polyvinyl alcohols having a degree of hydrolysis equal to or less than 90 mol %, wherein the first group of polyvinyl alcohols having a degree of hydrolysis greater than 90 mol % has a viscosity from 2 mPa*s to 35 mPa*s;
• wherein the copolymer dispersion comprises, based on dried polymer, from 60 to 95 wt % of the C1-13 alkanoic acid, from 1 to 35 wt % of the alpha-olefin, and from 0.1 to 5 wt % of the at least one auxiliary co-monomer, and from 0.5 to 20 wt % of the at least one stabilizer;
• and
• wherein the copolymer dispersion has a viscosity from 2000 mPa*s to 30,000 mPa*s at 25 to 65% solids;
• wherein the adhesive composition has an MFFT lower than 15° C., a D3-3 bond strength greater than 2 N/mm2 according to DIN EN 204:2016, and a bond strength greater than 4 N/mm2 according to DIN EN 14257:2019 (WATT91).