公开(公告)号：US5043365A

公开(公告)日：1991-08-27

申请号：US407232

申请日：1989-09-14

申请人： Arno Gardziella ,  Alois Kwasniok ,  Peter Adolphs ,  Ralf Wetzig

发明人： Arno Gardziella ,  Alois Kwasniok ,  Peter Adolphs ,  Ralf Wetzig

IPC分类号： B22C1/00 ,  C08G18/18 ,  C08G18/54

CPC分类号： B22C1/00 ,  C08G18/542

摘要： A granular molding material with a binder comprising a phenol novolac and a polyisocyanate which hardens upon addition of amine catalysts wherein the molar ratio of phenol to formaldehyde in the novolac is 1:0.25 to 1:0.5 and has the formula ##STR1## wherein R, R' and R" are individually selected from the group consisting of hydrogen, alkyl of 1 to 12 carbon atoms, hydroxy, cycloalkyl of 3 to 12 carbon atoms and an anellated ring and X is an integer from 0 to 4 or >4 with the percent molar distribution based on X is as follows:______________________________________ when X = 0: 20-55% X = 1: 15-30% X = 2: 10-30% X = 3: 0-50% X .gtoreq. 4: 0-2.5% ______________________________________ for the production of improved foundry cores and molds.

摘要翻译： 一种具有粘合剂的粒状模制材料，其包含苯酚酚醛清漆和多异氰酸酯，其在加入胺催化剂时硬化，其中酚醛与酚醛清漆之间的摩尔比为1:0.25至1:0.5，并具有式“ R'和R“分别选自氢，1至12个碳原子的烷基，羟基，3至12个碳原子的环烷基和一个安定的环，X是0-4或> 4的整数， 基于X的摩尔分数百分比如下：当X = 0:20-55％-X = 1：15-30％-X = 2:10-30％-X = 3:0-50％-X > / = 4：0-2.5％ - 用于生产改进的铸造芯和模具。