Patent ID: 6489425
Filing Date: 2002-12-03
Classification: C08F,C08L

Abstract:
A styrene random copolymer comprising at least one unit of styrene derivative and at least one unit of macromonomer, said at least one unit of styrene derivative being polymerized from a styrene derivative monomer of formula (1), said at least one unit of macromonomer being polymerized from a macromonomer of formula (2), whereinR1 is selected from the group consisting of hydrogen, halogen, and alkyl groups with 1Ëœ20 carbon atoms, R2 is at least one selected from the group consisting of saturated hydrocarbons with 1Ëœ20 carbon atoms, aromatic groups, and cycloalkyl groups with the proviso that R2 is not â€”COâ€” or â€”CH2â€”C6H4â€”, R3 is a saturated hydrocarbon group with 1Ëœ10 carbon atoms, X is at least one ion polymerizable monomer unit selected from the group consisting of monomers of formulae (A) to (K): R4, R5, R6, R7, R8, and R9 are the same or different and are selected from the group consisting of hydrogen, halogen, alkyl groups with 1Ëœ20 carbon atoms, and alkoxy groups with 1Ëœ20 carbon atoms, R10, R11, R12, R13, R16, and R17 are the same or different and are selected from the group consisting of alkyl groups with 1Ëœ20 carbon atoms, R14 and R15 are the same or different and are selected from the group consisting of hydrogen and alkyl groups with 1Ëœ20 carbon atoms, R18 is selected from the group consisting of hydrogen and alkyl groups with 1Ëœ4 carbon atoms, R19 is selected from the group consisting of alkyl groups with 1Ëœ4 carbon atoms, and l is the degree of polymerization for X and is an integer from about 10 to about 1,000, wherein the amount of the macromonomer is 0.1Ëœ50% by weight based on the weight of the random copolymer, and wherein the weight average molecular weight of the random copolymer ranges from about 50,000 to about 2,000,000.