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Emulsifier, aqueous emulsifier solution, method for producing aqueous emulsifier solution, and oil dispersion in water
Emulsifier, aqueous emulsifier solution, method for producing aqueous emulsifier solution, and oil dispersion in water
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机译：乳化剂，水性乳化剂溶液，生产乳化剂溶液的方法，以及水中的油分散体
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摘要
PROBLEM TO BE SOLVED: To provide an emulsifier capable of easily dispersing a water-insoluble or sparingly water-soluble organic drug in an aqueous medium containing water as a main component to prepare an oil-in-water dispersion having excellent dispersion stability. An emulsifier used for dispersing a water-insoluble or sparingly water-soluble organic drug in water, and a polymer satisfying the following requirements [1] to [4]. [1] AB block copolymer. [2] The polymer block A is a polymer block having a glass transition temperature of 0 ° C. or lower and occupying 10 to 40% by mass of the AB block copolymer. [3] A water-soluble or water-soluble polymer block in which the polymer block B contains 50 to 100% by mass of a structural unit (B-1) derived from a monomer (B-1) such as polyethylene glycol monomethyl ether methacrylate. be. [4] The number average molecular weight is 5,000 to 20,000, and the molecular weight distribution is 1.5 or less. [Selection diagram] None
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