High bio renewable content inks for laminating printing inks

A solvent-borne polyurethane or polyurethane/urea polymer, formed by:

• (a) preparing a polyurethane or polyurethane/urea prepolymer by reacting:
• i. one or more bio-based polyether polyols, bio-based dimer diols, bio-based low molecular weight diols, or bio-based low molecular weight polyols, or combinations thereof;
• wherein the polyols and diols do not contain any dicarboxylic acid moieties;
• and
• ii. one or more polyisocyanates, having two or more isocyanate groups;
• wherein the polyisocyanate is selected from the group consisting of 1,4-diisocyanatobutane;
• 1,6-diisocyanatohexane;
• 1,5-diisocyanato-2,2-dimethylpentane;
• 4-trimethyl-1,6-diisocyanatohexane;
• 1,10-diisocyanatodecane;
• 1,3-diisocyanatocyclo-hexane;
• 1,4-diisocyanatocyclo-hexane;
• 1-isocyanato-5-isocyanatomethyl-3,3,5-trimethylcyclohexane;
• isophorone diisocyanate (IPDI);
• 2,3-diisocyanato-1-methylcyclohexane;
• 2,4-diisocyanato-1-methylcyclohexane;
• 2,6-diisocyanato-1-methylcyclohexane;
• 4,4′-diisocyanatodicyclohexylmethane;
• 2,4′-diisocyanatodicyclohexylmethane;
• 1-isocyanato-3-(4)-isocyanatomethyl-1-methyl-cyclohexane;
• 4,4′-diisocyanatodiphenylmethane;
• 2,4′-diisocyanatodiphenylmethane;
• 2,2,4-trimethyldiisocyanatohexane;
• 2,4,4 trimethyldiisocyanatohexane;
• 1,1′-methylenebis[4-isocyanato-benzene](MDI);
• 1,3-diisocyanatomethyl-benzene (TDI);
• and blends thereof;
• and
• wherein the amount of unreacted isocyanate (NCO %) of the pre-polymer is 0.1 to 3.0;
• and
• (b) chain extending the polyurethane by reaction with a chain extender selected from one or more bio-based monoamines, polyamines, alcohols, or polyols;
• and
• wherein the chain extension reaction is carried out with 80% to 120% equivalents of the chain extension agent, based on the equivalents of unreacted NCO on the prepolymer;
• wherein the % bio-renewable carbon (% BRC) of the polyurethane polymer is equal to or greater than 50%.