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2. 发明授权

US4769076A Binders for manufacture of precision casting molds 失效
标题翻译：用于制造精密铸造模具的粘合剂
公开(公告)号：US4769076A
公开(公告)日：1988-09-06
申请号：US881274
申请日：1986-07-02
申请人： Yoshitane Watanabe , Akira Kitajima , Keiko Tasaki , Isamu Yuuki
发明人： Yoshitane Watanabe , Akira Kitajima , Keiko Tasaki , Isamu Yuuki
IPC分类号： B22C1/18 , B22C1/20 , B28B7/28
CPC分类号： B22C1/205
摘要： Binders for manufacture of precision casting molds are provided, which are highly stable and are advantageous in that these may impart a high strength to the green molds as obtained by forming an accumulative refractory coat layer on a water-soluble pattern and then taking off the pattern from the coat layer, that no interlayer cleavage occurs in the accumulative coat layer when the pattern is taken off in the formation of the green mold, that the binders may impart a high strength to fired molds, that the castings as obtained by the use of the present fired molds are free from the surface roughness and other surface faults and that the dimension accuracy of the castings is not deteriorated at all by the use of the present binders.The binders of the present invention are characterized by containing the following components (a), (b) and (c) and optionally (d):(a) an organo-silicasol capable of providing 5-50 parts by weight of SiO.sub.2 in the binder;(b) 1-50 parts by weight of an alkyl silicate, an alkoxy-organosilane or a mixture thereof in the binder;(c) 1-30 parts by weight of a binder-soluble amine in the binder;(d) 1-30 parts by weight of an alkoxide of Ti, Zr, Sn, Al or In or a mixture thereof in the binder.
摘要翻译：提供了用于制造精密铸造模具的粘合剂，其是高度稳定的，并且有利的是这些可以赋予生坯模具高的强度，所述模具通过在水溶性图案上形成累积的耐火涂层，然后脱模在涂层形成时，当在模具的形成中取出图案时，在累积涂层中不发生层间剥离，粘合剂可赋予烧结模具高的强度，通过使用本发明的模具没有表面粗糙度和其他表面缺陷，并且通过使用本发明的粘合剂，铸件的尺寸精度根本不劣化。本发明的粘合剂的特征在于含有以下组分（a），（b）和（c）和任选的（d）：（a）能够提供5-50重量份SiO 2的有机二氧化硅粘合剂（b）1-50重量份的粘合剂中的硅酸烷基酯，烷氧基 - 有机硅烷或它们的混合物; （c）粘合剂中1-30重量份的粘合剂可溶性胺; （d）1-30重量份的Ti，Zr，Sn，Al或In的醇盐或它们在粘合剂中的混合物。

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