Nissan Chemical Industries Limited

Senju Metal Industry Co., Ltd.

Hisao Ikeda

Motohiko Hidaka

Yasuhiro Gunji

Atsumi Aoki

Toshinari Koda

Satoru Miyake

Shuji Tsuchiya

Atsuo Murata

Hideo Suzuki

Fumio Suzuki

Koichi Maeda

Takeo Moro

Yasuhiro Takahashi

Ken'ichi Osawa

Mitsunobu Matsumura

Yoshitane Watanabe

Kenji Suzuki

Toshihiko Taguchi

Akihiro Konno

Hiroshi Murakami

Shozo Asano

Takami Ono

Hiroo Nagai

Hiroyuki Uehara

Fumiyoshi Arima

Syuji Tsuchiya

Suketoshi Tsukamoto

Fumio Mizuochi

Yoshitane Watanbe

Hirosi Murakami

A process for producing &#x3b2;-form tris-(2,3-epoxypropyl)-isocyanurate crystals containing from 2 to 15 wt % of &#x3b1;-form tris-(2,3-epoxypropyl)-isocyanurate in the interior of the crystals, which comprises the following steps (A), (B), (C) and (D):

Method for reducing an organic solvent remaining in &#x3b2;-form tris- (2,3,-epoxypropyl)&#x2014;isocyanurate crystals

A method for reducing organic solvents remaining in tris-(2,3-epoxypropyl)-isocyanurate crystals, which comprises pulverizing, as a material, crystal particles of tris-(2,3-epoxypropyl)-isocyanurate obtained by a recrystallization method, while evaporating a volatile component from the surface of the particles.

Method for reducing organic solvents remaining in tris-(2,3-epoxypropyl)-isocyanurate crystals

Optically active &bgr;-type tris-(2,3-epoxypropyl)-isocyanurate is obtained by a method of reacting isocyanuric acid with an optically active epihalohydrin, or a method of optically resolving a racemic modification of tris-(2,3-epoxypropyl)-isocyanurate by using an amylose or cellulose derivative. It is a method for producing a high melting point type tris-(2,3-epoxypropyl)-isocyanurate obtained by mixing two enantiomers of optically active &bgr;-type tris-(2,3-epoxypropyl)-isocyanurate.

Optically active epoxy compound

Resin compositions for powdery coatings

Resin composition for powder coating

A process for producing an isocyanurate derivative of the formula (1):

Process for producing an isocyanurate derivative

.beta.-form tris-(2,3-epoxypropyl)-isocyanurate crystals containing from 2 to 15 wt % of .alpha.-form tris-(2,3-epoxypropyl)-isocyanurate in the interior of the crystals.

.beta.-form tris-(2, 3-epoxypropyl)-isocyanurate crystals and process

A method for reducing an organic solvent remaining in tris-(2,3-epoxypropyl)-isocyanurate crystals, which comprises pulverizing crystal particles of tris-(2,3-epoxypropyl)-isocyanurate while evaporating a volatile component from the surface of the particles.

Method for reducing an organic solvent remaining in

Weather-resistant resin composition for powder coating

A 2,3-epoxypropyl derivative or a 2-methyl-2,3-epoxypropyl derivative of a compound having carboxyl groups or amido groups is produced as a purified product having an epoxide equivalent of 1.0 to 1.1 times the theoretical epoxide equivalent of the derivative, an ionic halogen content of 10 ppm or less, transparency when molten and a stability against increase in the epoxide equivalent when stored at 150.degree. C. for 24 hours, by a process comprising steps (A) reacting 1.2 to 60 mol of an epihalohydrin or a 2-methyl-epihalohydrin with 1 mol of active hydrogen atoms of the carboxyl or amido group of the compound in the presence of a particular catalyst, thereby forming a reaction product containing a 2-hydroxy-3-halopropyl derivative or a 2-hydroxy-2-methyl-3-halopropyl derivative, (B) dehydrohalogenating the derivative by adding to the reaction product a sufficient amount of an alkali metal hydroxide thereby forming a final slurry containing the 2,3-epoxypropyl derivative of the 2-methyl-2,3-epoxypropyl derivative and the alkali metal halide, (C) washing the final slurry or a liquid product formed by removing the alkali metal halide from the final slurry thereby forming a refined liquid containing the derivative, and (D) removing by evaporation the epihalohydrin or the 2-methyl-epihalohidrin from the refined liquid, thereby forming the 2,3-epoxypropyl derivative or the 2-methyl-2,3-epoxypropyl derivative as the purified product.

Method for producing purified epoxy compound

A resinous substance obtained by reacting a rosin compound containing 1 to 10 equivalents of carboxylic groups per kilogram with triglycidyl isocyanurate. A process for producing it is also disclosed.

Resinous substance

A water-soluble soldering flux and paste solder using the flux are disclosed, the flux comprising, as a main fluxing agent, a resinous reaction product of at least one carboxyl-containing compound having 8 or less carbon atoms, selected from the group consisting of monocarboxylic acids, polycarboxylic acids, and hydroxy-carboxylic acids with tris-(2,3-epoxypropyl)-isocyanurate.

Water-soluble soldering flux and paste solder using the flux

Disclosed are a papermaking method comprising the steps of sheet-formation of an aqueous papermaking stock which contains a cellulose fiber or the said fiber and an inorganic filler, dewatering and drying, charaacterized by the addition of a starch ether derivative of a general formula (I): ##STR1## where St--O represents a starch molecule residue, R.sub.1, R.sub.2 and R.sub.3 independently represent an alkyl group having from 1 to 18 carbon atoms or a benzyl group, provided that two or more of these R.sub.1, R.sub.2 and R.sub.3 must not be a benzyl group or an alkyl group having from 5 to 18 carbon atoms at the same time, and any two of these R.sub.1, R.sub.2 and R.sub.3 may be bonded to form a cyclic structure, the said derivative containing the ether bond preferably in a degree of substitution of from 0.01 from 0.1, to the said papermaking stock in an amount of from 0.05 to 5.0% by weight of the cellulose fiber or the total of the said fiber and the inorganic filler in the said stock, as well as the said starch ether derivative of the formula (I) and a method for preparation of the said derivative.

Papermaking method

Growing community of inventors

Chiba, Japan

Hisao Ikeda