The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 1983
Filed:
Jan. 23, 1981
Kazuyuki Nishikawa, Toyohashi, JP;
Katsumi Hirao, Akashi, JP;
Daicel Chemical Industries, Ltd., Osaka, JP;
Shinto Kogio, Ltd., Nagoya, JP;
Abstract
A binder for casting sand of the present invention comprises 5-95 wt. % of cellulose acetate and 5-95 wt. % of a thermosetting resin precondensate such as an alkylated methylolmelamine, alkylated methylolurea or a mixture of them, and it is used particularly for the casting carried out at a relatively low casting temperature. Up to about 50% of cellulose acetate may be replaced with an acetate of an aliphatic polyhydric alcohol or an alkyl phthalate. In the resin-coated grains of sand of the present invention, the grains of sand are coated with a binder comprising 5-95 wt. % of cellulose acetate and 5-95 wt. % of a thermosetting resin precondensate.