Patent ID: 8362176

Claim:
A process for making a polymerisable ethylenically unsaturated macromonomer from unsaturated non-mineral oil, the oil being a mixture of triglycerides, some of which comprise at least one fatty acid having at least two non-conjugated unsaturated bonds at least one of which is ethylenically unsaturated, the process comprising the steps of i) conjugating the non-conjugated unsaturated bonds; ii) reacting the reaction product of step i) with an enophile having an acid, ester or anhydride moiety to form an adducts; iii) 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; iv) reacting the intermediate of step iii) with a chain extender having at least two moieties reactive with the acid, ester or anhydride moiety of the enophile to form the macromonomer; wherein the oil has an iodine value of from 110 to 180g of iodine per 100g of oil.