Takemoto Yushi Kabushiki Kaisha

Kazuhisa Okada

Mitsuo Kinoshita

Masahiro Iida

Akihiro Furuta

A process for producing an alkylene oxide adduct can continuously produce the alkylene oxide adduct by using a microflow reactor having a tubular flow passage and a micromixer connected to a supply port of the microflow reactor. Liquid state alkylene oxide, alkylene catalyst and an organic compound having an active hydrogen atom(s) are reacted while passing therethrough under the conditions of a temperature of the flow passage of 70 to 200&#xb0; C. and a pressure of the supply port of the flow passage of 1 to 10 MPa.

Process for producing alkylene oxide adduct and alkylene oxide adduct

Method of producing polyetherester monomer and cement dispersants

Cement dispersants which contain two specified kinds of water-soluble vinyl copolymers mixed at a specified ratio can produce cement compositions such as concrete with water/cement ratio of 20-40 weight % with a reduced slump loss and provide a high early strength.

Methods of using cement dispersants for producing concrete

A cement dispersant composed of water-soluble vinyl copolymers which include specified kinds of constituent units at specified ratios and of which the weight average molecular weight pullulan converted by GPC method is 15000-150000 and the ratio of weight average molecular weight to number average molecular weight is 2-7 is used together with cement, aggregates and water to produce concrete with the water-to-cement ratio of 20-45%.

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Gamagori, Japan

Kazuhisa Okada