发明名称 |
FOUNDRY MOULDS AND CORES |
摘要 |
A foundry moulding composition comprising (a) a granular refractory material, (b) from 0.25 to 2.5% based on the weight of the refractory material of an aqueous solution of a potassium alkali phenol-formaldehyde resin, said aqueous solution having a solids content of from 50 to 75% and said resin having a weight average molecular weight ( &upbar& Mwr) of from 700 to 2000, a formaldehyde:phenol molar ratio of from 1.2:1 to 2.6:1 and a potassium hydroxide:phenol molar ratio of from 0.5:1 to 1.2:1; (c) from 0.05 to 3% based on the weight of said aqueous solution, of at least one silane, and (d) from 20 to 110% based on the weight of said aqueous solution of at least one ester active to catalyze curing of said resin. |
申请公布号 |
DE3360081(D1) |
申请公布日期 |
1985.05.02 |
申请号 |
DE19833360081 |
申请日期 |
1983.01.20 |
申请人 |
BORDEN (UK) LIMITED |
发明人 |
LEMON, PETER HERBERT RICHARD BRYAN;RAILTON, JEFFREY DAVID;BAKER, DEREK WILLIAM;COPPOCK, VINCENT |
分类号 |
B22C1/00;B22C1/02;B22C1/10;B22C1/22;C08G8/10;C08G8/28;C08K5/10;C08L61/00;C08L61/04;C08L61/08;C08L61/14;(IPC1-7):B22C1/00;B22C1/20 |
主分类号 |
B22C1/00 |
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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