Takeda Chemical Industries, Inc.

Kojin Co., Ltd.

Takeo Wada

Hideaki Matsuda

Hiroshi Onaka

Kazumi Matsuura

Kazuo Okada

Masayasu Kamijo

Shinichiro Katsuta

Mitsuo Kato

A hydraulic inorganic compositions which comprises a hydraulic inorganic powder at least one of polysaccharides selected from the group consisting of .beta.-1,3-glucans, pullulan and XCD-Polymer in an amount of 0.1-10 parts by weight in relation to 100 parts by weight of the hydraulic inorganic powder, and water in an effective amount. The composition preferably further contains a reinforcing fiber, a filler, in particular mountain leather, a coagulant and/or a second molding aid, in particular, methyl cellulose. The composition is hardened by hydration under normal pressure to provide a hardened molded article such as a cement board.

Hydraulic inorganic composition and molded articles thereof

A process for producing acidic boratozirconium chloride sols which comprises: reacting a zirconium compound with a boron compound in molar ratios of B/Zr of 0.3-1.2 together with a compound of a metal M, the metal M being selected from the group consisting of divalent, trivalent, tetravalent and pentavalent metals in molar ratios of M/Zr of about 0.01-1 in water in the presence of chloride ions in molar ratios of Cl/Zr of not less than about 1. The acidic boratozirconium chloride sol may be converted to basic boratozirconium sols by reacting the acidic sol with a basic carbonate compound such as ammonium carbonate. The sols, either acidic or basic, are readily gelled by contact with a dehydration solvent such as methanol or actone. The gel is calcined at relatively low temperatures to provide zirconia which is either very pure or stabilized in varied degrees.

Process for producing zirconium sols and gels, and process for producing

A process for producing acidic boratozirconium chloride sols which comprises: reacting a zirconium compound with a boron compound in molar ratios of B/Zr of 0.3-1.2 together with a compound of a metal M other than boron, the metal M being selected from the group consisting of divalent, trivalent, tetravalent and pentavalent metals in molar ratios of M/Zr of about 0.01-1 in water in the presence of chloride ions in molar ratios of Cl/Zr of not less than about 1. The acidic boratozirconium chloride sol may be converted to basic boratozirconium sols by reacting the acidic sol with a basic carbonate compound such as ammonium carbonate. The sols, either acidic or basic, are readily gelled by contact with a dehydration solvent such as methanol or acetone. The gel is calcined at relatively low temperatures to provide zirconia which is either very pure or stabilized in varied degrees.

A process for preparing ceramic moldings containing no organic matter with retention of their original shapes which comprises mixing 100 parts by weight of ceramic powders and/or fibers, 0.1 to 50 parts by weight of papermaking organic fibers and/or wet-end additives and 3 to 200 parts by weight of mountain leather, molding the resulting mixture to obtain an unburned molding having enough mechanical strength to withstand molding processings and, subjecting the unburned molding to burning treatment.

Process for preparing ceramic molding

A hormite inclusion complex which comprises hormite having adsorbed and/or supported thereon at least one member selected from the group consisting of s sulphur and a sulphur-donating agent. The hormite inclusion complex is for example used in the vulcanization of rubber, there are entirely eliminated the scorching and bloom phenomena which have often been encountered in the utilization of sulphur or sulphur-donating agent alone according to the conventional procedures.

Hormite inclusion complex with adsorbed sulphur or sulphur donor

Method for production of a zeolitic material represented by the formula:

Growing community of inventors

Kawanishi, Japan

Takeo Wada