Mitsubishi Petrochemical Company Limited

Research Association for Utilization of Light Oil

K.i. System Co., Ltd.

Sadao Kitagawa

Yuta Kumano

Shiroh Gotoh

Isao Okada

Takashi Yokoi

Teruo Saito

Makoto Imanari

Masaki Fujii

Yoshihisa Watanabe

Shin-ichi Yamauchi

Masaki Saito

Akira Ako

Mitsushige Baba

Shoichi Masukawa

Mitsumasa Kaitoh

Mitushige Baba

Mitsumasa Kaito

Lignin and alkali are efficiently sorted out of alkaline black liquor discharged from the paper manufacturing/pulp and paper manufacturing industries and the treated water is made as purified water. Acid is added to the black liquor and its pH is adjusted to 2.5 to 3.5. An aggregating agent is added to have lignin contained in the black liquor settled and the black liquor is separated into lignin and clean water. Ozone gas, preferably in the micro bubble state, is given to the clean water for contact reaction.

Black liquor treatment method

Disclosed is a resin molding comprising a molding composed of a resin composition comprising 100 parts by weight of a substrate resin comprising 100 to 30% by weight of at least one propylene polymer selected from the group consisting of propylene/ethylene block copolymers having an ethylene content of 3 to 45% by weight and propylene/ethylene random copolymers having an ethylene content of 0.5 to 10% by weight and 0 to 70% by weight of an elastomer, and at least one member selected from the group consisting of (A) 0.01 to 10 parts by weight of a 1,3-diene polymer having at least one terminal hydroxyl group or a hydrogenation product thereof, (B) 0.01 to 40 parts by weight of a copolymer of ethylene with an unsaturated compound containing a carboxyl group (including an acid anhydride group) and (C) 0.01 to 40 parts by weight of a copolymer of ethylene with an unsaturated compound containing a hydroxyl group, with the proviso that if at least two members of components (A), (B) and (C) are used in combination, the total amount does not exceed 40 parts by weight, which preferably has a coating formed directly on the surface of said molded body. One preferred application of this coated resin molding is an automotive part, especially a bumper.

Resin molding

A resin composition comprising an olefin resin (A), a copolymer of olefin with non-conjugated diene (B) and at least one polymer (C) selected from the group consisting of the following polymers;

Olefin resin composition

Disclosed is a coated resin molding comprising a molding composed of a resin composition comprising 100 parts by weight of a substrate resin comprising 100 to 30% by weight of at least one propylene polymer selected from the group consisting of propylene/ethylene block copolymers having an ethylene content of 3 to 45% by weight and propylene/ethylene random copolymers having an ethylene content of 0.5 to 10% by weight and 0 to 70% by weight of an elastomer, and at least one member selected from the group consisting of (A) 0.01 to 10 parts by weight of a 1,3-diene polymer having at least one terminal hydroxyl group or a hydrogenation product thereof, (B) 0.01 to 40 parts by weight of a copolymer of ethylene with an unsaturated compound containing a carboxyl group (including an acid anhydride group) and (C) 0.01 to 40 parts by weight of a copolymer of ethylene with an unsaturated compound containing a hydroxyl group, with the proviso that if at least two members of components (A), (B) and (C) are used in combination, the total amount does not exceed 40 parts by weight, and a coating formed directly on the surface of said molded body. One preferred application of this coated resin molding is an automotive part, especially a bumper.

Coated resin molding

A thermoplastic elastomer comprising 55-90 parts by weight of a crosslinked acrylic rubber having a glass transition temperature of 0.degree. C. or lower and 45-10 parts by weight a copolymer of a methacrylate ester with a maleimide, which has a glass transition temperature of 110.degree. C. or higher. This thermoplastic elastomer may be produced by a first step of polymerizing an acrylic ester in the presence of a polyfunctional monomer with or without a chain transfer agent and a second step of adding a methacrylate ester and a maleimide to the resulting acrylic rubber to carry out copolymerization.

Thermoplastic elastomer and a process for its production

A polymer prepared by subjecting to conditions of radical graft polymerization a copolymer of an .alpha.-olefin and an aliphatic nonconjugated diene and a monomer that is capable of radical polymerization with said copolymer is described. This polymer has high miscibility with a dissimilar resin and has a high practical value for use as a compatibilizing agent in blending two or more resins.

Unsaturated copolymer resin composite

Alkaline earth metal salts of aziridine-2-carboxylic acid, typically Ca salt, are produced by a reaction of a 2,3-dihalopropionic acid derivative or an .alpha.-haloacrylic acid derivative with an aqueous ammonia in the presence of an alkaline earth metal hydroxide, typically Ca(OH).sub.2. Salts of aziridine-2-carboxylic acid are recovered from such a reaction product as referred to above by a liquid chromatographic technique in which a weak or weakened cation exchanger is utilized.

Production of aziridine-2-carboxylic acid salts

A modified copolymer prepared by modifying an unsaturated copolymer resin comprising at least one .alpha.-olefin having 2 to 12 carbon atoms and at least one 1,4-dienes represented by formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are defined as hereinbefore, thereby to introduce a hydroxyl group or epoxy group into at least 1% of an olefinically unsaturated bond in the resin. This copolymer has excellent printability and adhesive properties and also has a good durability.

Modified copolymer

Dioxane derivatives are disclosed which are represented by the formula (I): ##STR1## wherein, R stands for a hydrogen atom or an aliphatic residue having 1 to 10 carbon atoms; R.sup.1 and R.sup.2 stand for a hydrogen atom or a hydrocarbon residue having 1 to 10 carbon atoms, respectively; and R, R.sup.1 and R.sup.2 which exist plurally may be the same or different, respectively. Such dioxane derivatives (I) are produced by reacting a glycolaldehyde represented by the formula (II) ##STR2## with an amine represented by the formula (III)

2,5-diamino-1,4-dioxane derivatives and process for production thereof

A thermoplastic, substantially resinous, unsaturated, random copolymer of ethylene, propylene or 4-methyl-1-pentene with a branched 1,4-diene of the formula ##STR1## wherein R.sup.1 is an alkyl group of a maximum of 8 carbon atoms, and each of R.sup.2 and R.sup.3 is hydrogen or an alkyl of a maximum of 8 carbon atoms, exclusive of the case where both R.sup.2 and R.sup.3 are both hydrogen.

Unsaturated copolymers

This invention relates to a process for producing an .alpha.-olefin polymer having a high stereoregularity in a high yield by polymerizing .alpha.-olefin in the presence of a catalyst composed of solid catalyst component (I) prepared by contacting (A) magnesium halide, (B) aromatic carboxylic acid ester, (C) halogen compound of titanium, and (D) siloxyaluminum compound with each other, and (II) an organometallic compound of a metal of Group I to III in the Periodic Table.

Process for producing .alpha.-olefin polymer

A process for producing olefin polymers comprising contacting an ethylenically unsaturated monomer comprising at least one olefin monomer with a catalyst system comprising a combination of a catalyst component I and a catalyst component II as described hereunder:

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Yokkaichi, Japan

Sadao Kitagawa