POLYURETHANE RESIN, POLYURETHANE RESIN COMPOSITION, BINDER FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM USING SAID BINDER
PURPOSE:To obtain the title resin excellent in solution stability and an affinity for a magnetic powder by using a polyether polyurethane resin composed of a polyol moiety and a polyether moiety with a chain extended through a urethane bond, wherein the weight-average molecular weight of the resin a...
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Main Authors | , , |
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Format | Patent |
Language | English |
Published |
23.03.1993
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Subjects | |
Online Access | Get full text |
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Summary: | PURPOSE:To obtain the title resin excellent in solution stability and an affinity for a magnetic powder by using a polyether polyurethane resin composed of a polyol moiety and a polyether moiety with a chain extended through a urethane bond, wherein the weight-average molecular weight of the resin and the polyether moiety of the resin are specified. CONSTITUTION:A polyether polyurethane resin composed of a polyol molecule part and a polyether molecule part with a chain extended through a urethane bond, wherein the average molecular weight of the resin is 20000-200000, and the polyether molecule part comprises a polyether polyol manufactured by using a low-molecular-weight diol having an SO3M group (wherein M is an alkali metal or H) (e.g. 2-sulfosodium-1,4-butanediol) as an initiator. |
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Bibliography: | Application Number: JP19920018934 |