Patent ID: 8338549

Claim:
A process for producing a polymer, comprising the following steps: A. obtaining a fatty substance from a renewable resource, wherein at least one fatty acids of the fatty substance comprises a C=C unsaturation; B. producing a C 6-9 olefin (a) having a number of carbon atoms (n) ranging from 6 to 9 by means of the following steps: optionally performing a hydrolysis or a transesterification of the fatty substance so as to form, respectively, fatty acids or fatty esters; reacting by the cracking or oxidizing cleavage of the fatty substance, the fatty acids or the fatty esters, in which said reacting is carried out so as to form saturated species having a number of carbon atoms ranging from 6 to 9 comprising, according to the conditions, an acid, ester, aldehyde or alcohol function; performing an additional hydrogenation step when the function is an aldehyde, acid or ester, so as to form a saturated alcohol; dehydrating the saturated alcohol to form a C 6-9 olefin (a); C. polymerizing one or more monomers, at least one of which is said olefin (a).