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专利名称：Water dispersible moulds发明人：Richard Melling,Nigel Challand申请号：US08/039147申请日：19930615公开号：US05573055A公开日：19961112
摘要：A water dispersible mould for making a casting, the mould comprising a water-insoluble particulate material-and a binder therefor, the binder including polyphosphatechains and/or borate ions. The invention also provides a process for making a waterdispersible mould for making a casting, the process including the steps of: (a) providing awater- insoluble particulate material; (b) combining the particulate material with a binderincluding polyphosphate chains and/or borate ions, the chains and/or ions being
dissolved in water; (c) forming, either during or after step (b), the particulate material andbinder mixture into a desired shape; and (d) removing free water from the mixture. Thepolyphosphate chains may be derived from a water soluble phosphate glass and theborate ions may be derived from a soluble borate glass.
申请人：BORDEN (UK) LIMITED
代理机构：Roylance, Abrams, Berdo & Goodman, LP.
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