US 7,732,549 B2 · Multi-branched polymer

Abstract

The aim of the present invention is to provide a multi-branched polymer, in which branch terminals can be easily modified and which have a high degree of branching and narrow dispersion. By polymerizing a compound having 2 or more polymerization-initiation sites and polymerizable unsaturated bonds with a living radical polymerization method using a metal catalyst, it is possible to produce a multi-branched polymer with narrow dispersion and a high degree of branching and having repeating units represented by the formula (I): wherein R1 to R3 each independently represents hydrogen or a hydrocarbon group, R1 may be bonded to R3 to form a ring; X represents a connecting group having a valence of 3 or higher; Y may be the same or different and each represents a functional group which may have a halogen atom at a terminal thereof; and a is an integer of 2 or larger.

Claims12

Dependent claims

A multi-branched polymer having repeating units represented by a formula (IV):

(wherein R1 to R3 each independently represents hydrogen or a hydrocarbon group, R1 may be bonded to R3 to form a ring;
Y may be the same or different and each represents a functional group with a structure where a halogen atom becomes an active halogen atom when the halogen atom is bound to a constituting carbon atom;
a is an integer of 2 or larger;
and V represents an polyoxyalkylene group having a valence of 3 or higher).

1 more element

A process for preparing multi-branched polymer comprising:

living radical polymerization of the compounds represented by a formula (VI):
(wherein R8 to R10 each independently represents hydrogen or a hydrocarbon group, and R8 may be bonded to R10 to form a ring;
X1 represents a connecting group having a valence of 3 or higher;
Y1 may be the same or different and each represents a functional group with a structure where a halogen atom becomes an active halogen atom when the halogen atom is bound to a constituting carbon atom;
a1 is an integer of 2 or larger, Y1 is selected from the functional groups of;
and,
when X1 is an aromatic hydrocarbon group or an aromatic heterocyclic group, Y1 is selected from the functional groups of;
and R11 represents a chlorine atom, a bromine atom, or an iodine atom) using a metal catalyst, wherein
the reactions at the polymerization-initiation site and the polymerizable unsaturated bond in formula (VI) are performed simultaneously.

6 more elements

Dependencies are inferred from the claim text.

Multi-branched polymer

Life of this patent

Multi-branched polymer

Life of this patent

Abstract

Claims12