Sumitomo Chemical Company, Limited

Hayashibara Biochemical Laboratories, Inc.

Atsuo Mori

Shuji Kitamura

Kozo Tsuji

Kozo Kotani

Kiyohiko Nakae

Kohji Yamatsuta

Taisuke Okita

Masaaki Hama

An adhesive composition comprising (1) a polyolefin having therein at least one repeating unit containing a carbonyl group and (2) at least one of calcium chloride, magnesium chloride or a mixture thereof.

Adhesive composition

A sand mold composition for the metal casting comprising a molding sand and pullulan as a binder therefor. As compared with prior art, the present composition has following advantages: in the molding step, no gas, dust, noise, or vibration is generated; in the pouring and sand stripping steps, neither noxious gas nor offensive odor is emitted; although the mold has a sufficiently high strength at room temperature for the convenient handling, it is readily broken down after the casting and so renders the knock-out and sand stripping very easy; and the recovered sand can be reused as such, practically without any after-treatment. The molding cycle is comparable to that of conventional oil sand or carbon dioxide-bonded mold.

Sand mold composition for metal casting

A resin-coated high pressure glass bottle prepared by forming a first layer with pullulan on the exterior surface of a high pressure glass bottle and then overcoating this first layer with a resin of high alkali resistance, e.g. an epoxy, urethane or ethyl cellulose resin.

Resin-coated glass bottles

The present invention provides for a curable polyurethane composition comprising a keto compound and a liquid mixture of an organic aliphatic polyfunctional polyisocyanate and a compound having active hydrogen, the keto compound having the general formula: ##EQU1## wherein R.sub.1 and R.sub.2 are each an alkyl group, an aromatic group, and a heterocyclic group, which may be the same or different, and R.sub.2 is a lower alkylene or alkenyl group having 1 to 2 carbon atoms. The curable polyurethane composition is characterized by exhibiting a long pot life due to the existence of the aforementioned keto compound therein.

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Takatsuki, Japan

Atsuo Mori