Unitika Ltd.

Sachiko Kokuryo

Koji Fujimoto

Tsuneo Tamura

Kazushige Kojima

Hiroshi Kajimaru

Yohei Kabashima

Takashi Ida

Norio Fukawa

Ken-ichi Kawada

Izumi Yoshida

Daisuke Shirasawa

Masaki Yoshikawa

Toru Tanaka

There is provided a crystalline polylactic acid resin composition comprising 95 to 99.97 parts by mass of a polylactic acid resin (A) having a D-isomer content of not greater than 0.6 mol % or not less than 99.4 mol %, and 0.03 to 5 parts by mass of a crystal nucleus agent (B). There is also provided a crystalline polylactic acid resin composition prepared by melt-kneading 100 parts by mass of a polylactic acid resin (A) having a D-isomer content of not greater than 0.6 mol % or not less than 99.4 mol %, 0.01 to 20 parts by mass of a (meth)acrylate compound (C), and 0.02 to 20 parts by mass of a peroxide (D).

Crystalline polylactic acid resin composition and product molded/formed therefrom

The present invention is to provide an aqueous dispersion of polyester resin with an excellent molecular weight stability, its production method, and an aqueous coating composition. An aqueous dispersion of polyester resin having an acid value of 8 to 40 mg KOH/g and a weight average molecular weight of 9,000 or more contains an organic solvent less than 0.5% by mass. A method for producing the aqueous dispersion of polyester resin comprising a step of at first obtaining an aqueous dispersion of polyester resin containing not lower than 0.5% by mass of an organic solvent by adding the polyester resin and a basic compound to an aqueous medium to make the resulting mixture aqueous and a step of removing the organic solvent from the aqueous dispersion. An aqueous coating composition can be obtained by adding a curing agent to the foregoing aqueous dispersion of polyester resin.

Aqueous dispersion of polyester resin, production method of the same, and aqueous coating composition

The present invention provides a polyamide resin composition in which silicate layers originating from a layered silicate and having the below-described property {circle around (1)} are uniformly dispersed on a molecular level in a polyamide resin to accomplish high strength, high modulus, high heat resistance, high toughness, excellent dimensional stability, and high tensile elongation with a small deviation. {circle around (1)}: average particle size from a photograph observation of transmission electron microscopy is 0.1 &mgr;m or less and not including a maximum particle size of 30 &mgr;m or higher.

Polyamide resin composition and process for producing the same

A polyamide resin composition comprising a copolyamide and silicate layers originating from a swellable fluoromica, dispersed in said copolyamide on a molecular level, wherein an average thickness and an average aspect ratio (length/thickness) of the silicate layers are within specific ranges. Also disclosed is a process for preparing the polyamide resin composition.

A polyamide resin composition comprising (A) a reinforced polyamide resin which comprises 100 parts by weight of a nylon 6 homopolymer or copolymer and 1 to 20 parts by weight of a layered silicate uniformly dispersed in the polymer on the molecular level and (B) a non-reinforced polyamide resin, a test specimen of said composition having a tensile weld strength of 45 MPa or higher and a flexural modulus of 4 GPa or higher.

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Uji, Japan

Sachiko Kokuryo