Mitsubishi Gas Chemical Company, Inc.

Akira Miyamoto

Senzo Shimizu

Katsuo Sato

Yasumitsu Higuchi

Yoshitaka Yamagishi

Masahiro Kurokawa

Masahiro Harada

Toshiyuki Abe

Toshiaki Nishimura

Mitsuyasu Nagano

Kiyoshi Morishige

Koji Yamamoto

Toshio Hidaka

Hiroka Tanisake

Kazuo Yamamiya

Tetsushi Ichikawa

Yoshimasa Mitui

Masayoshi Maeda

Tamotu Ajiro

Hideki Hara

Masayoshi Okamura

Fumitaka Sato

Fumitaka Satoh

Kohji Yamamoto

A highly reactive aromatic hydrocarbon-formaldehyde resin having a diarlymethane content of not more than 5% by weight, essentially containing reactive groups of any one of CH.sub.2 OH, CH.sub.2 OCH.sub.3 and CH.sub.2 OCH.sub.2 OCH.sub.3 at both molecular terminals and having a xylenol value of at least 15 mol/kg as an index of reactivity with a compound having active hydrogen atoms is prepared by reacting an aromatic hydrocarbon such as xylene, mesitylene or naphthalene with formaldehyde at a molar ratio of the formaldehyde to the aromatic hydrocarbon of 2.0 to 5.0, a sulfuric acid concentration of 15 to 35% by weight in an aqueous layer and a reaction temperature of 80.degree. to 110.degree. C. while controlling a formaldehyde conversion within a range of 50 to 70% by mole over the range 4 to 8 hours. By reaction of the aromatic hydrocarbon-formaldehyde resin with the compound having reactive hydrogen atoms such as phenols and carboxylic acids, a modified aromatic hydrocarbon resin capable of giving a cured resin having a high mechanical strength and a high heat resistance can be obtained.

Highly reactive aromatic hydrocarbon-formaldehyde resin and process for

A novel polyamine compound, N,N'-bis(3-aminomethylbenzyl)-2-hydroxytrimethylenediamine, having the formula ##STR1## which is useful as a hardening agent for epoxy resins and as a modifier for polyamide resins.

Novel polyamine

A process for producing an oligoester which comprises:

Process for producing oligoesters

A hardening agent for epoxy resins comprising an amideamine compound which is a reaction product between (A) a polyamine mainly comprising a compound represented by the formula: ##STR1## wherein n represents 1 or 2, which is obtained by reacting m-xylylenediamine and epichlorohydrin, and (B) a carboxylic acid.

Hardening agent for epoxy resins comprising an amideamine compound

A process for preparing a polyamide is provided. The polyamide is prepared by causing a dicarboxylic acid and a diamine to polycondensate directly under an atmosphere of an inert gas at atmospheric pressure. The polycondensation reaction is mainly carried out in two diamine component-adding steps, one step comprising adding part of the diamine to the molten dicarboxylic acid until the molar ratio of the diamine to the dicarboxylic acid is brought to within the range of from 0.900 to 0.990 while raising continuously the temperature of the reaction mixture to a temperature not exceeding about 5.degree. C. above the melting point of the object polyamide and the other step comprising adding the remainder of the diamine to the reaction mixture maintained at a temperature higher than about 10.degree. C., but not exceeding about 35.degree. C. above the melting point of the object polyamide until the overall molar ratio of the diamine to the dicarboxylic acid is brought to within the range of from 0.995 to 1.005.

Process for preparing polyamide with molten dicarboxylic acid component

A process for preparing a polyamide is provided. The polyamide is prepared by effecting direct polycondensation reaction of a dicarboxylic acid component containing at least 80 mole % of adipic acid and a diamine component containing at least 70 mole % of m-xylylene diamine under an atmosphere of an inert gas and at atmospheric pressure at a controlled temperature which is higher than the melting point of the dicarboxylic acid component and which can maintain the reaction mixture in a uniformly-fluidized state throughout the reaction.

Process for preparing polyamide in uniformly fluidized state

A process for the preparation of a modified aromatic hydrocarbon resin which comprises reacting an aromatic hydrocarbon-formaldehyde resin with an unsaturated polybasic acid or an anhydride thereof, together with a saturated polybasic acid or an anhydride thereof if necessary, in the presence or absence of water, while introducing steam into the reaction system to remove by-produced formaldehyde out of the reaction system, and reacting the formed reaction product with at least one dihydroxy compound selected from the group consisting of (A) a glycol and (B) a hydroxy-terminated oligomer obtained by reacting a glycol with an unsaturated polybasic acid or an anhydride thereof; the cured product of the modified aromatic hydrocarbon resin being excellent in mechanical strength and resistance to water and alkalis.

Process for preparation of modified aromatic hydrocarbon resin

A modified aromatic hydrocarbon resin is prepared by reacting an aromatic hydrocarbon-formaldehyde resin with an unsaturated polybasic acid or an anhydride thereof, if desired, together with a saturated polybasic acid or an anhydride thereof, while making water or water and an aliphatic alcohol present in the reaction system and removing the formaldehyde formed by the reaction. The cured product has a good mechanical strength and a high resistance to water and alkalis.

Processes for producing an oligoester and producing unsaturated polyester resin by use of the oligoester using unsaturated dibasic acid or its anhydride and isophthalic acid as dibasic acid components, and propylene oxide as a polyol component, characterized by (a) the step of reacting isophthalic acid with propylene oxide in the presence of an amine compound catalyst to form an oligoester, (b) the step of removing volatile components from the oligoester by heating it at a temperature range of 180.degree.-300.degree. C., (c) the step of treating the resulting oligoester with silica-alumina compound having adsorbing property, and (d) the step of reacting the oligoester so treated with the unsaturated dibasic acid or its anhydride.

Process for producing an oligoester and producing unsaturated polyester

A polyamide molding composition is disclosed comprising the admixture of glass fibers, nylon 6,6, and an MX nylon, obtained from the condensation of a xylylenediamine and an .alpha.,.omega.-straight chain aliphatic dibasic acid having 6-12 carbon atoms.

Polyamide resin molding composition

A glass fiber-reinforced polyamide resin molding material, comprising a polyamide resin obtained by the condensation reaction of xylylene diamine with at least one member selected from straight-chain aliphatic .alpha.,.omega.-dicarboxylic acids having 6 to 12 carbon atoms and incorporated therein, glass fiber in an amount of 5 to 50% by weight based on the total weight of the polyamide resin and the glass fiber, and a shaped article obtained by molding aforesaid molding material.

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Kanagawa, Japan

Akira Miyamoto