Mitsubishi Gas Chemical Company, Inc.

Mitsubishi Electric Company

Shun Ogawa

Hisayuki Kuwahara

Shota Arakawa

Takashi Kashiba

Kentaro Ishii

Kenichiro Usuda

Takahiko Sumino

Satoshi Okada

Shinichi Ikeda

Shinpei Iwamoto

Fumihiro Ito

Toshiya Takagi

Shinichi Ayuba

Tomomichi Kanda

Masatoshi Echigo

Takeshi Koyama

Takeshi Hirokane

Takeo Hayashi

Satoshi Yoshinaka

Tsutomu Numoto

A manufacturing method of a multilayer syringe barrel is provided and includes: a finish cutting a remaining gate of a nozzle portion of a multilayer syringe barrel that is injection-molded from a nozzle tip, with a cutting blade of an ultrasonic cutting apparatus including a mechanism for suppressing abnormal vibration; and irradiating a laser beam to a corner portion of the nozzle portion, the corner portion being formed during the finish cutting.

Manufacturing method of multilayer syringe barrel

Disclosed is a polyamide resin composition, including: a polyamide (A) containing a diamine unit including 70 mol % or more of a p-xylylenediamine unit and a dicarboxylic acid unit including 70 mol % or more of a linear aliphatic dicarboxylic acid unit having 6 to 18 carbon atoms; and a filler (B), in which the polyamide (A) includes a polyamide having a phosphorus atom concentration of 50 to 1,000 ppm and a YI value of 10 or less in a color difference test in accordance with JIS-K-7105, and a content of the filler (B) is 1 to 200 parts by mass with respect to 100 parts by mass of the polyamide (A).

Polyamide resin composition

Provided is an oxygen-absorbing multilayer body including an oxygen-absorbing layer containing an oxygen-absorbing composition and a thermoplastic resin layer containing a thermoplastic resin (b), wherein the oxygen-absorbing composition includes at least one compound having a tetralin ring represented by Formula (1), a transition metal catalyst, and a thermoplastic resin (a). 

Oxygen-absorbing multilayer body, oxygen-absorbing container, oxygen-absorbing airtight container, oxygen-absorbing push-through pack, and storage method using same

Oxygen-absorbing resin composition, not responsive to a metal detector, producing no odor after absorption of oxygen and has excellent oxygen-absorbing performance in a wide range of humidity conditions from low to high humidity. An oxygen-absorbing molded article, and a multilayer body, container, injection-molded article and medical containers also provided. The oxygen absorbing resin composition contains a polyester, comprising at least one constituent unit having a tetralin ring component compound, a transition metal catalyst, and a catalyst for producing the polyester. The oxygen-absorbing molded article of the present invention can be formed by molding the oxygen-absorbing resin composition into a film or a sheet. The multilayer body, container, injection-molded article, medical container, etc. of the present invention are obtained by using the oxygen-absorbing resin composition.

Oxygen-absorbing resin composition and oxygen-absorbing molded article using same and multilayer body, container, injection-molded article and medical container using these

Provided is an oxygen-absorbing medical multilayer container including at least three layers including a first resin layer containing a thermoplastic resin (b1), an oxygen-absorbing layer containing an oxygen-absorbing composition, and a second resin layer containing a thermoplastic resin (b2), in this order, where the oxygen-absorbing composition contains at least one compound having a tetralin ring represented by Formula (1), a transition metal catalyst, and a thermoplastic resin (a).

Oxygen-absorbing medical multilayer container and method for storing biological medicine

Provided are a novel oxygen-absorbing resin composition not responsive to a metal detector, producing no odor after absorption of oxygen and having excellent oxygen-absorbing performance, and a multilayer body, container, injection-molded article and medical container using these. Further provided are an oxygen-absorbing resin composition etc. having excellent oxygen-absorbing performance in a wide range of humidity conditions from low humidity to high humidity. The oxygen-absorbing resin composition of the present invention is an oxygen-absorbing resin composition containing a polyamide compound and a transition metal catalyst, wherein the polyamide compound has at least one constituent unit having a tetralin ring. Moreover, the multilayer body, container, injection-molded article, medical container, etc. of the present invention are obtained by using the oxygen-absorbing resin composition of the present invention.

Oxygen-absorbing resin composition, and multilayer body, container, injection-molded body, and medical container using same

Provided is a novel oxygen-absorbing resin composition having excellent oxygen-absorbing performance and suppressing odor generation after absorption of oxygen even if a material responsive to a metal detector is not used. Further provided is an oxygen-absorbing resin composition having excellent oxygen-absorbing performance in a wide range of humidity conditions from low humidity to high humidity. Such an oxygen-absorbing resin composition contains a copolymerized polyolefin compound and a transition metal catalyst, in which the copolymerized polyolefin compound contains at least one constituent unit having a tetralin ring.

Oxygen-absorbing resin composition and oxygen-absorbing multilayer body using same, and molded article and medical container using these

A polyamide resin composed of constitutional units derived from a diamine component 70 mol % or more of which is derived from p-xylylenediamine and constitutional unit derived from a dicarboxylic acid 70 mol % or more of which is derived from an aliphatic dicarboxylic acid having 6 to 18 carbon atoms. The polyamide resin has a number average molecular weight (Mn) of 10,000 to 50,000 and a degree of dispersion (weight average molecular weight/number average molecular weight=Mw/Mn) satisfying the following formula (1):1.5&#x2266;(Mw/Mn)&#x2266;6.0,wherein Mw and Mn are determined by gel permeation chromatography (GPC).

Polyamide resin

A method of producing polyamide by the direct polycondensation of a diamine component and a dicarboxylic acid component without using a solvent, such as water. The diamine component containing 70 mol % or more of p-xylylenediamine is added to a reaction system containing the dicarboxylic acid component under pressure while maintaining the reaction system in a molten state. After the addition of the diamine component, the pressure of the reaction system is reduced to atmospheric pressure over 50 min or more at a pressure falling speed of 1.0 MPa/h or less. By the production method, polyamide with a small molecular weight dispersion is easily produced.

Method for producing polyamide

The invention provides a polyamide having a dicarboxylic acid unit containing a decahydronaphthalenedicarboxylic acid unit in an amount of 60 mol % or more, and a diamine unit.

Polyamide

Disclose is a polyamide resin composition having excellent heat resistance, heat aging resistance and mechanical physical properties, which is produced by incorporating a specified aromatic secondary amine compound and a specified organic sulfur based compound into a polyamide composed of a diamine unit containing a paraxylylenediamine unit as a major component and a dicarboxylic acid unit containing a linear aliphatic dicarboxylic acid unit having from 6 to 18 carbon atoms as a major component.

Polyamide resin composition and molded article

Disclosed is a flame-retardant polyamide resin composition, including: a polyamide (A) containing a diamine unit including 70 mol % or more of a p-xylylenediamine unit and a dicarboxylic acid unit including 70 mol % or more of a linear aliphatic dicarboxylic acid unit having 6 to 18 carbon atoms; an organic halogen compound (B) that serves as a flame retardant; an inorganic compound (C) that serves as a flame retardant aid; and an inorganic filler (D), in which the polyamide (A) includes a polyamide having a phosphorus atom concentration of 50 to 1,000 ppm and a YI value of 10 or less in a color difference test in accordance with JIS-K-7105, and a content of the organic halogen compound (B), a content of the inorganic compound (C), and a content of the inorganic filler (D) are 1 to 100 parts by mass, 0.5 to 50 parts by mass, and 0 to 100 parts by mass, respectively, with respect to 100 parts by mass of the polyamide (A).

Flame-retardant polyamide resin composition

The present invention relates to a curing agent composition for epoxy resins comprising (A) a polyamine compound which is a reaction product of a compound having at least one glycidyl group in a molecule with a diamine having a specific structure, (B) a polyether-modified polysiloxane having a surface tension in the range of 19 dyne/cm to 25 dyne/cm and (C) an amino group-modified polysiloxane having a total amine value in the range of 150 mgKOH/g to 650 mgKOH/g which can provide excellent curing performances, excellent performances of epoxy resin cured coating films and excellent physical properties of epoxy resin cured products, an epoxy resin composition comprising said curing agent composition for epoxy resins and an epoxy resin cured product obtained by curing said epoxy resin composition.

Curing agent composition for epoxy resins and epoxy resin composition

The present invention provides a polyurethane resin composition containing an active hydrogen compound (A) formed by adding m-xylylene diisocyanate and/or hexamethylene diisocyanate to a specific compound (C) at a reaction equivalent ratio ([the number of isocyanate groups]/[the number of hydroxyl groups]) of 0.80 to 0.10; and an organic polyisocyanate compound (B) formed by adding a specific compound (D) to m-xylylene diisocyanate and/or hexamethylene diisocyanate at a reaction equivalent ratio ([the number of isocyanate groups]/[the number of hydroxyl groups]) of 2 to 10; an adhesive and a coating material containing the resin composition; and a multi-layer film and a packaging bag containing any of these.

Polyurethane resin composition

The present invention relates to a curing agent for epoxy resins comprising (A) an epoxy adduct of isophoronediamine, (B) an epoxy adduct of 1,3-bis(aminomethyl) cyclohexane, (C) isophoronediamine and (D) 1,3-bis (aminomethyl) cyclohexane wherein the weight ratio of (D) to (C) (=(D)/(C)) in said curing agent is in the range of 0.04 to 0.22, which can provide an epoxy resin composition with excellent curing performances such as curability under the condition of low temperature, excellent performances of epoxy resin cured coating films, excellent chemical resistance of epoxy resin cured coating films and excellent physical properties of epoxy resin cured products.

Growing community of inventors

Kanagawa, Japan

Shun Ogawa