发明名称 |
Binder for casting sand and resin-coated grains of sand |
摘要 |
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.
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申请公布号 |
US4379865(A) |
申请公布日期 |
1983.04.12 |
申请号 |
US19810227875 |
申请日期 |
1981.01.23 |
申请人 |
DAICEL CHEMICAL INDUSTRIES, LTD.;SHINTO KOGIO, LTD. |
发明人 |
NISHIKAWA, KAZUYUKI;HIRAO, KATSUMI |
分类号 |
B22C1/22;C08L61/00;C08L61/20;(IPC1-7):B22C1/00;C08G12/00;C08G12/12 |
主分类号 |
B22C1/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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