Patent ID: 7910664

Claim:
A method for preparing a multi-branched polymer, which comprises carrying out at least one nucleophilic substitution reaction selected from the group consisting of (A), (B), (C) and (D) reactions according to the following reaction scheme 1: wherein X is H or CH 3 ; R is selected from the group consisting of the following R 1 , R 3 and R 4 ; R 1 is selected from the group consisting of: (OCH 2 CH 2 ) n OZ, (OCH 2 CHCH 3 ) n OZ, (OCHCH 3 CH 2 ) n OZ, (OCH 2 CH 2 ) n (OCH 2 CHCH 3 ) m (OCH 2 CH 2 ) k OZ, OCH 2 CH 2 ) n (OCHCH 3 CH 2 ) m (OCH 2 CH 2 ) k OZ, (OCH 2 CHCH 3 ) n (OCH 2 CH 2 ) m (OCH 2 CHCH 3 ) k OZ, (OCHCH 3 CH 2 ) n (OCH 2 CH 2 ) m (OCHCH 3 CH 2 ) k OZ, (OCH 2 CHCH 3 ) n (OCH 2 CH 2 ) m (OCHCH 3 CH 2 ) k OZ and (OCHCH 3 CH 2 ) n (OCH 2 CH 2 ) m (OCH 2 CHCH 3 ) k OZ; R 3 is (O(CH 2 ) n CO) m OZ; R 4 is (NH(CH 2 ) n CO) m NZ 2 ; wherein each of n, m and k represents an integer between 0 and 200; Q is selected from the group consisting of H, CH 3 , CH 2 CH 3 , CH 2 CH 2 OH and CH 2 CH 2 NH 2 ; W is selected from Br, I and H; Z is selected from the group consisting of H, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, isopentyl, neopentyl, cyclopentyl, hexyl, cyclohexyl, vinyl (—CH═CH 2 ), —CCH, propargyl, allyl, benzyl, acetyl (COCH 3 ), propionyl, isobutyryl, neopetyryl, CH 2 CH 2 CH 2 Si(OMe) 3 , CH 2 CH 2 CH 2 Si(OEt) 3 , CH 2 CH 2 CH 2 SiMe(OMe) 2 , CH 2 CH 2 CH 2 SiMe(OEt) 2 , CH 2 CH 2 CH 2 Si(OMe)Me 2 , CH 2 CH 2 CH 2 Si(OEt)Me 2 , CH 2 CH 2 OH and CH 2 CH 2 NH 2 ; and L is a halogen atom.