Patent ID: 7230062
Filing Date: 2007-06-12
Classification: C08F

Abstract:
1. An acrylic copolymer consisting of at least a first acrylic monomer represented by the following general formula (1): where R 1 and R 2 may be the same or different from each other, each of which represents a group selected from the group consisting of an aliphatic hydrocarbon group, an aliphatic group and an aromatic hydrocarbon group (here, the main chain of the aliphatic hydrocarbon group is composed of 3 or less carbon atoms; the aliphatic group is one obtained by substituting some of the carbon atoms in the aliphatic hydrocarbon group with at least one atom selected from the group consisting of an oxygen atom, a sulfur atom, a silicon atom and a nitrogen atom; and the aromatic hydrocarbon group is one which is composed of 4 or less fused benzene rings, may include at least one substituent group selected from the group consisting of the aliphatic hydrocarbon group and the aliphatic group, and may be one obtained by substituting some of the carbon atoms in the aromatic hydrocarbon group with at least one atom selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom), and R a second acrylic monomer represented by the following general formula (2): where R 5 and R 6 may be the same or different from each other, and at least one of R 5 and R 6 represents a group selected from the group consisting of an aliphatic hydrocarbon group and an aliphatic group (here, the main chain of the aliphatic hydrocarbon group is composed of 4 to 60 carbon atoms; and the aliphatic group is one obtained by substituting some of the carbon atoms in the aliphatic hydrocarbon group with at least one atom selected from the group consisting of an oxygen atom, a sulfur atom, a silicon atom and a nitrogen atom), and in the case where one of the R 5 and R 6 represents neither the aliphatic hydrocarbon group nor the aliphatic group, it represents a group selected from the group consisting of an aliphatic hydrocarbon group, an aliphatic group and an aromatic hydrocarbon group (here, the aliphatic group is one obtained by substituting some of the carbon atoms in the aliphatic hydrocarbon group with at least one atom selected from the group consisting of an oxygen atom, a sulfur atom, a silicon atom and a nitrogen atom; and the aromatic hydrocarbon group may include at least one substituent group selected from the group consisting of the aliphatic hydrocarbon group and the aliphatic group, and may be one obtained by substituting some of the carbon atoms in the aromatic hydrocarbon group with at least one atom selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom), and R wherein the first acrylic monomer makes up 50 to 99% of total monomer units in the copolymer.