Patent ID: 6762257
Filing Date: 2004-07-13
Classification: C07D,C08F

Abstract:
A controlled radical polymerization chain transfer agent comprising a compound of the formula: wherein R1 and R2 are each independently selected from H, an alkyl group, a nitrile, a cycloalkyl group, a heterocyclic group, an arenyl group and an aryl group, or R1 and R2 taken together with the carbon to which they are attached form a carbocyclic ring;R3 and R4 are each independently selected from an alkyl group, a cycloalkyl group, an aryl group, an arenyl group, a heterocyclic group or R3 and R4 taken together with the carbon to which they are attached form a carbocyclic ring; Yâ€”S is a xanthate group, a thioxanthate group, or a dithioester group; Q is a linking group selected from a covalent bond, aryl group, (â€”CH2â€”)o, â€”COâ€”Oâ€”(CH2)oâ€”, â€”COâ€”Oâ€”(CH2CH2O)oâ€”, â€”COâ€”NR8â€”(CH2)oâ€”, â€”COâ€”Sâ€”(CH2)oâ€”, where o is 1 to 12, and R8 is H, an alkyl group, a cycloalkyl group, and arenyl group, a heterocyclic group or an aryl group; and n is 0 or 1.