Patent ID: 6949298
Filing Date: 2005-09-27
Classification: C08F,C08L,Y10T

Abstract:
1. A method for producing a styrene-hydrogenated diene block copolymer (A), comprising: introducing at least one functional group selected from the group consisting of a boronic acid group and boron-containing groups capable of being converted into a boric acid group in the presence of water, by an addition reaction, to an olefinic double bond of a starting styrene-hydrogenated diene block copolymer; thereby obtaining said styrene-hydrogenated diene block copolymer (A) which contains in its side chain said at least one functional group; wherein an amount of said functional group contained in the block copolymer (A) is 100 to 2000 μeq/g and a weight ratio of styrene units to hydrogenated diene units contained in the block copolymer (A), [(styrene unit)/(hydrogenated diene unit)], is 5/95 to 70/30.