发明授权
- 专利标题： Foundry moulds and cores
- 专利标题（中）： 铸造模具和核心
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申请号： US434462申请日： 1982-10-14
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公开(公告)号： US4474904A公开(公告)日： 1984-10-02
- 发明人: Peter H. R. B. Lemon , Jeffrey D. Railton , Derek W. Baker , Vincent J. Coppock
- 申请人： Peter H. R. B. Lemon , Jeffrey D. Railton , Derek W. Baker , Vincent J. Coppock
- 专利权人： Lemon Peter H R B,Railton Jeffrey D,Baker Derek W,Coppock Vincent J
- 当前专利权人： Lemon Peter H R B,Railton Jeffrey D,Baker Derek W,Coppock Vincent J
- 优先权： GBX8201668 19820121
- 主分类号： B22C1/00
- IPC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 ; C08K3/36
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 (M.sub.wr) 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.
公开/授权文献
- US5684448A Shape memory actuated switching device 公开/授权日：1997-11-04
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