Novel molding materials
    6.
    发明授权
    Novel molding materials 失效
    新型成型材料

    公开(公告)号:US5043365A

    公开(公告)日:1991-08-27

    申请号:US407232

    申请日:1989-09-14

    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。

    Process for producing duroplastic molding compounds
    9.
    发明授权
    Process for producing duroplastic molding compounds 失效
    生产塑料模塑料的方法

    公开(公告)号:US5977214A

    公开(公告)日:1999-11-02

    申请号:US930637

    申请日:1998-01-20

    CPC分类号: C08J3/22

    摘要: In the process according to the invention molding compounds based on duroplastic bonding agents are produced thereby that the bonding agents are mixed as a melt with the filler and additive substances. Curing is achieved thereby that the temperature of the mixture during the mixing process increases above the onset temperature of the curing reaction and, after the desired degree of curing has been attained, is suddenly lowered.

    摘要翻译: PCT No.PCT / EP97 / 00964 Sec。 371日期1998年1月20日 102(e)日期1998年1月20日PCT 1997年2月27日PCT PCT。 第WO97 / 32921号公报 日期1997年9月12日根据本发明的方法,生产基于硬脂酸粘合剂的成型化合物,由此将粘合剂作为熔体与填料和添加剂物质混合。 实现固化,从而混合过程中混合物的温度升高到固化反应的起始温度之上,并且在达到所需的固化程度之后,突然降低。