Patent ID: 8383752

Claim:
A method of making a polymerisable ethylenically unsaturated macromonomer comprising the steps of i) providing a chosen unsaturated non-mineral oil or a mixture of unsaturated non-mineral oils having a first blend of triglycerides; ii) treating the chosen unsaturated non-mineral oil or mixture of unsaturated non-mineral oils with a transesterification catalyst to produce a second blend of triglycerides different from the first blend; iii) reacting the second blend of triglycerides with an enophile having an acid, ester or anhydride moiety to form an adduct; iv) reacting the adduct with an ethylenically unsaturated monomer having a moiety reactive with the acid, ester or anhydride moiety of the enophile to form an intermediate; v) reacting the intermediate of step iv) with a chain extender having at least two moieties reactive with the acid, ester or anhydride moiety of the enophile to form the ethylenically unsaturated macromonomer.