Silane functionalized rosins

A silane functionalized rosin composition which comprises a compound of Formula 1:

• wherein X is:
• (i) a heteroatom, or
• (ii) either C(O)O or C(O)NH;
• Z is a linear carbon chain having the formula (CH2)n, a branched hydrocarbon, a hydroxyl group-substituted hydrocarbon, a divalent ether moiety of the formula (CH2)n—O—(CH2)n, or a cycloaliphatic hydrocarbon group;
• each n is an integer of 2 to 4;
• each R is independent selected from the group consisting of alkoxy, OH, H, or alkyl, and wherein at least one of R is alkoxy or OH on each Si atom;
• p is an integer of from 1 to 8;
• the silane functionalized rosin is produced by reaction of a carboxyl functionalized rosin and a functional silane, the carboxyl functionalized rosin is a cycloaddition adduct produced by reaction of:
• (A) a rosin ester, and (B) an ethylenically unsaturated dicarboxylic acid, or anhydride, to thereby form an intermediate, and then reaction of the intermediate with a silane-containing carboxyl-reactive group, and the rosin ester comprises one or more of rosin triethylene glycol ester, rosin glycerol ester, and rosin pentaerythritol ester.