公开(公告)号：US4474904A

公开(公告)日：1984-10-02

申请号：US434462

申请日：1982-10-14

申请人： Peter H. R. B. Lemon ,  Jeffrey D. Railton ,  Derek W. Baker ,  Vincent J. Coppock

发明人： Peter H. R. B. Lemon ,  Jeffrey D. Railton ,  Derek W. Baker ,  Vincent J. Coppock

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

CPC分类号： B22C1/2253 ,  C08G8/10 ,  C08G8/28 ,  C08L61/14

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.

摘要翻译： 一种铸造模制组合物，其包含（a）颗粒耐火材料，（b）基于钾碱性酚醛树脂的水溶液的耐火材料的重量为0.25至2.5％，所述水溶液的固体含量为 50〜75％，所述树脂的重均分子量（＆amp; Upbar＆Mwr）为700〜2000，甲醛：苯酚的摩尔比为1.2:1〜2.6:1，氢氧化钾：苯酚的摩尔比为0.5 ：1〜1.2：1; （c）基于所述水溶液的重量，0.05至3％的至少一种硅烷，和（d）基于所述至少一种酯催化固化的酯水溶液的重量的20至110％ 所说的树脂。