Mitsui Toatsu Chemicals, Incorporated

Takayoshi Masuda

Tsukuru Izukawa

Satoshi Ozaki

Haruhiko Kawakami

Masayuki Kimura

Toshio Nozawa

Yoshimoto Watanabe

Tsutomu Takase

Shinji Ando

Fumio Yamazaki

Tadashi Kobayashi

Hiroshi Takayanagi

Hosei Shinoda

Masaru Honjo

Masami Ohtaguro

Yukio Fukui

Naomi Hori

Sinji Ando

Katuyoshi Asano

Kouji Matui

Mitsugu Kita

Masahiko Hashiba

Ariko Suekane

Akira Usagawa

Ryoji Kawashima

Seiji Esaki

The present invention relates to a novel polyol obtained by using a specified polyhydric alcohol, polyoxyalkylene polyol, aliphatic amine and/or alkamlamine as a raw material and adding an organic polycarboxylic acid or its anhydride and an alkylene oxide; a polyurethane resin prepared from said novel polyol and an organic polyisocyanate; a rigid polyurethane foam prepared by using a hydrochlorofluorocarbon or hydrofluorocarbon foaming agent which has very low public hazards; and a composite utilizing thereof. The production of rigid polyurethane foam by using the polyol of the invention can be carried out in good operation efficiency and low public hazards. Additionally, properties of the foam thus obtained is equivalent to those of rigid polyurethane foams obtained by using conventional chlorofluorocarbons. Consequently, the rigid polyurethane foam of the invention is very useful for insulation materials and structural insulation materials.

Polyol, polyurethane resin and utilization thereof

The present invention relates to a polyol, polyurethane resin, rigid polyurethane foam, preparation process thereof and a preparation process of a rigid polyurethane foam composite. The polyol comprises an epoxy resin based polyol, which may be combined with a phenol resin based polyol component and/or an aromatic amine based polyol component. The polyurethane resin, foam and composite using the polyol as a raw material has resistance to dissolution in a hydrochlorofluorocarbon and a hydrofluorocarbon which are foaming agents having very low public environmental hazards and can be used as a thermal insulation material or a thermal insulation structure for refrigerators, freezers, insulation panels, ships and vehicles.

Polyol and rigid polyurethane foam

A polyurethane resin, rigid polyurethane foam and composite thereof prepared by using a polyol comprising a phenol resin base polyol mixed with an aminophenol base polyol or a polyphenylpolyxylylenepolyamine base polyol or a polymethylenepolyphenylpolyamine base polyol.

Polyol and utilization thereof

The present invention relates to a novel polyurethane resin, a foam prepared from the resin, a preparation process of the foam, and preparation process of a rigid polyurethane foam composite having a face material. The primary object of the present invention is to provide a rigid polyurethane foam and a rigid polyurethane foam composite fitted with a face material which are prepared by using a hydrochlorofluorocarbon foaming agent having very low public hazards such as ozone layer destruction and green house phenomenon of the earth. The above object can be achieved by using a combination of a polyether polyol initiated from a phenol resin with an alkanolamine or an aliphatic polyhydroxy compound in the production of rigid polyurethane foams. Foams thus obtained have equivalent properties to those of foams obtained by using chlorofluorocarbons (CFC) which are conventional foaming agents.

Polyurethane resin and utilization thereof

Photochlorination of aromatic compounds having at least one alkyl side chain is carried out in the presence of an alkylene polyamine previously mixed with an aromatic compound having at least one chlorinated side chain whereby side reactions are suppressed. Aromatic compounds having a monochlorinated side chain are stabilized with an alkylene polyamine. Stainless steel apparatuses can be used in both cases.

Process for preparing aromatic compounds having chlorinated side chains

A process for preparing polyoxyalkylene polyamine having secondary amino groups at the end of polymer chain by reaction of polyoxyalkylene polyol with primary amine is disclosed. Polyoxyalkylene polyamine having higher content of the secondary amino groups can be obtained by using a catalyst containing (1) Ni and Zn, (2) Co and Zn, or (3) Ni, Co and Zn; by using a conventionally known catalyst in the presence of monohydric alcohol; or by using the catalyst containing (1) Ni and Zn, (2) Co and Zn, or (3) Ni, Co and Zn, in the presence of monohydric alcohol.

Preparation process of polyoxyalkylene polyamine having terminal

In the manufacturing method of ethylene glycol and/or propylene glycol, these glycols can be prepared with a highly selectivity and at a high yield by applying the catalyst comprising a carboxylic acid and a carboxylic acid salt or a metal salt of formic acid alone.

Method for preparing ethylene glycol and/or propylene glycol

A process for copolymerizing lactide and glycolide by using a specific amount of stannous octoate as a catalyst in the presence of a polymerization regulator at temperature of 200.degree.-230.degree. C. to prepare dl-lactic acid-glycolic acid-copolymers which contain 50-60 mol % of a dl-lactic acid unit and 40-50 mol % of a glycolic acid unit and have inherent viscosity of 0.4-0.6 in chloroform.

Preparation process of dl-lactic acid-glycolic acid-copolymer

Disclosed herein is a granule containing physiologically-active substance which comprises at least

Granule containing physiologically-active substance, method for

An agent for bloat-prevention or -treatment which is useful for preventing or treating bloat caused by feeding large quantities of legume pasture or concentrate feed to ruminants comprises a mixture of a saccharide fatty acid ester and fatty acid salt.

Saccharide fatty acid ester for bloat-prevention or bloat-treatment

This invention provides a method for purifying crude fatty acid esters of saccharide containing at least fatty acid glycerides as impurity, and which method comprises decomposing the fatty acid glycerides by the treatment thereof with a lipid splitting enzyme or with a combination of a lipid splitting enzyme and a reducing agent in the presence of water.

Method for purifying fatty acid esters of saccharide

An improved process for the production of polytetramethylene ether glycol is disclosed. Polytetramethylene ether glycol is obtained with a high yield by subjecting tetrahydrofuran to ring opening polymerization in the presence or absence of an organic solvent with the use of, as a catalyst, a lithium halide in conjunction with fuming sulfuric acid. Average molecular weight of the glycol product can be controlled in the range of 1000-3000 at will by varying the amounts of the lithium halide and fuming sulfuric acid used.

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Tokai, Japan

Takayoshi Masuda