Adeka Corporation

Nobuyuki Shimamura

Takashi Usui

Naohiro Fujita

Kazushi Kobayashi

An aqueous dispersion of polyurethane resin is obtained by a chain elongation reaction in water wherein (C) at least one chain extender selected from a group consisting of water-soluble polyamines, hydrazine and derivatives thereof is added to a dispersion liquid obtained by emulsifying and dispersing a mixture in water. The mixture comprises: (B) at least one compound selected from the phosphorous compounds represented by the following formula (1) and (A) an urethane prepolymer and/or a neutralized urethane prepolymer material which has an isocyanate group at the terminal. The urethane prepolymer of component (A) is an urethane prepolymer obtained from (a1) an organic polyisocyanate and (a2) a polymeric polyol. The neutralized urethane prepolymer material of component (A) is a neutralized material obtained by neutralizing an urethane prepolymer which is obtained by further using (a3) a compound having an anionic hydrophilic group and at least two active hydrogens in a molecule together with the components (a1) and (a2).

Aqueous dispersion of polyurethane resin, flame-retardant polyester fiber using the same, and method for producing said fiber

The present invention is an aqueous polyurethane resin composition for a flame retardant coated material comprised of an aqueous dispersion of a polyurethane resin obtained by extending a chain of an urethane prepolymer in an aqueous dispersion. The aqueous dispersion of the urethane prepolymer is obtained by reacting (a) a polyisocyanate component with (b) a polyol component which contains a phosphorus-containing polyol compound represented by the following general formula (1) as an essential component then dispersed the obtained prepolymer in the water, wherein a unit corresponding to the compound represented by the said general formula (1) is contained so that the phosphorus content in the urethane resin solid is 0.3 to 5.0 mass percent; 

Aqueous polyurethane resin composition for flame retardant coated materials and coated products obtained by applying said composition

Disclosed is a glass fiber-reinforced crystalline resin composition superior in the surface properties and the mechanical properties of a molded article thereof. Specifically, provided is a glass fiber-reinforced crystalline resin composition containing a glass fiber sizing agent that is an aqueous resin containing an o-sulfobenzimide compound, a crystalline resin, glass fibers, wherein the glass fibers have been treated with the glass fiber sizing agent. An aqueous polyurethane resin is preferred as the aqueous resin.

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Saitama, Japan

Nobuyuki Shimamura