Kao Corporation

Naoki Kyochika

Akira Yoshida

Kazuhiko Kiuchi

Hitoshi Funada

Shigeru Nagao

Akio Mamba

Shigeo Nakai

Wataru Mizuno

Tsutomu Tanaka

Katsumi Matsuyama

Binder compositions for a mold each comprising a specific alkaline phenol-aldehyde resin are disclosed. Methods for producing a mold using any of the binder compositions are also disclosed.

Binder composition for mold and method for producing mold

A binder resin composition, a curing agent composition, a caking additive composition, a kit, a casting mold composition and a process for manufacturing a casting mold are disclosed, wherein a metallic compound containing a metallic element belonging to Group IB to VIII of the Periodic Table is utilized. The compositions are useful for the production of a sand mold for casting, having an excellent strength, from reclaimed sand, in a self-hardening or gas hardening mold process. The casting mold according to the present invention, which is manufactured in the presence of a metallic compound containing a metallic element belonging to Group IB to VIII of the Perioidic Table has excellent strength.

Composition for mold

A foundry mold is produced from sand by blending, with one another, sand, a binder comprising a ester cured-phenolic resin, a curing agent comprising an organic ester compound and one or more additives containing therein a metal of the groups IB to VIII, and molding and curing the mixture into a foundry mold. The mixture is useful in a self-curing molding method and a vapour curing molding method, and the resulting mold is thereby provided with an unexpected improved mechanical strength. In particular the invention is advantageously effective with used or reclaimed refractory sand.

Process for producing sand mold

A foundry sand mold is produced by molding a granular refractory material with the use of (1) a binder comprising a silane coupling agent, a water-soluble phenolic resin and a silane compound selected from an alkyl silicate having 1 to 8 carbon atoms in the alkyl group, its lower condensate, a silicone oil and a modified silicone oil and (2) a hardening agent comprising an organic ester.

Process for making foundry sand mold

Cellulose fibers can be effectively dyed with an assistant composition comprising (a) a polymer or copolymer of maleic acid, acrylic acid, methacylic acid or a salt thereof and (b) a sulfonate of a monocyclic or polycyclic aromatic compound or a condensate thereof with an aliphatic aldehyde.

Dyeing assistant composition for cellulose fibers

A detergent composition, suitable to clean a dyeing machine, comprises

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Aichi, Japan

Naoki Kyochika