Patent ID: 7247688

Claim:
A process for preparing a first generation polymer, comprising the step of free radical polymerization of a composition comprising: at least one ethylenically unsaturated monomer, a source of free radicals, and at least one compound (III) of general formula (IIIA): wherein: R 1 represents: an optionally substituted alkyl, acyl, aryl, aralkyl, alkene or alkyne group, an optionally substituted, aromatic, saturated or unsaturated heterocyclic or carbon ring, a polymeric chain, R 2 , and R 3 , which are identical or different, represent: a hydrogen atom, —S—R 1 , an optionally substituted alkyl, acyl, aryl, aralkyl, alkene or alkyne radical, an optionally substituted, aromatic, saturated or unsaturated heterocyclic or carbon ring, R 2 and R 3 , together, represent the atoms needed to form an optionally substituted, aromatic, saturated or unsaturated heterocyclic or carbon ring, wherein the ethylenically unsaturated monomer corresponds to the formula CXX′ (═CV-CV′) b ═CH 2 and the first generation polymer obtained corresponds to the formula wherein: R 1 represent: an optionally substituted alkyl, acyl, aryl, aralkyl, alkene or alkyne group, an optionally substituted, aromatic, saturated or unsaturated heterocyclic or carbon ring, a polymeric chain, R 2 and R 3 , which are identical or different, represent: a hydrogen atom, —S—R 1 or —S—[CXX′—(CV═CV′) b —CH 2 ] n —R 1 , an optionally substituted alkyl, acyl, aryl, aralkyl, alkene or alkyne radical, an optionally substituted, aromatic, saturated or unsaturated heterocyclic or carbon ring, R 2 and R 3 , together, represent the atoms needed to form an optionally substituted, aromatic, saturated or unsaturated heterocyclic or carbon ring, n is greater than or equal to 1, V and V′, which are identical or different, represent: a hydrogen atom, an alkyl group or a halogen, X and X′, which are identical or different, represent H, a halogen or a group R 4 , OR 4 , O 2 COR 4 , NHCOH, OH, NH 2 , NHR 4 , N(R 4 ) 2 , (R 4 ) 2 N + O − , NHCOR 4 , CO 2 H, CO 2 R 4 , CN, CONH 2 , CONHR 4 or CON(R 4 ) 2 , wherein R 4 are alkyl, aryl, aralkyl, alkaryl, alkene or organosilyl groups which are optionally perfluorinated and optionally substituted by one or more carboxy, epoxy, hydroxyl, alkoxy, amino, halogen or sulfonic groups, and b is 0 or 1.