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1.发明公开A method of manufacturing a foundry mould mix containing binder components and mould binder components therefor 失效一种制备Giessformmischung相关联粘结剂组分，以及用于该过程粘合剂组分的过程。
公开(公告)号：EP0083477A1
公开(公告)日：1983-07-13
申请号：EP82306479.5
申请日：1982-12-06
Applicant: Canadian Patents and Development Limited
Inventor： Szabo, Ervin I. , Whiting, Laurence V.
CPC classification number: B22C1/20
Abstract: A foundry mould binder component comprising at least one acid selected from the group consisting of glycolic acid, lactic acid, a-hydroxy butyric acid, valerolactic acid, a-hydroxy-caproic acid, tartronic acid, tartaric acid, malic acid, mucic acid, citric acid, gluconic acid, and glyceric acid, and a precipitant for the acid. The precipitant is for admixture with or contains the equivalent to at least 50% of the stoichiometric requirement of the total acid content of the binder component when the total acid content is in solution, said precipitant comprising at least one substance selected from the group consisting of cationic metal oxides and cationic metal oxide precursors, said precipitant being substantially non-fluxing with the foundry sand, and substantially nonreactive with respect to other mould components than the said acid, and substantially non-reactive with respect to metal which is to be cast in the mould. Taking one embodiment of the present invention comprising an aqueous solution of 50w/o citric acid and 3¾ w /o of a crushed limestone having a 96 w /o calcium carbonate content, and particles in a size range where 0 w /o is retained on a 140 United States Standard mesh screen and 20 w /o is retained on a 325 United States Standard mesh screen, then any other acid and precipitant mixture are selected to have a precipitation rate no faster than that said embodiment. The precipitant is preferably ground limestone, and the binder component may further include at least one humectant (e.g. sorbitol) admixed with the remainder to retard the loss of mould tensile strength during periods of low humidity.
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2.发明授权A method of manufacturing a foundry mould mix containing binder components and mould binder components therefor 失效一种制造包含粘合剂组分的模压混合物及其模具粘合剂组分的方法
公开(公告)号：EP0083477B1
公开(公告)日：1986-06-04
申请号：EP82306479.5
申请日：1982-12-06
Applicant: Canadian Patents and Development Limited
Inventor： Szabo, Ervin I. , Whiting, Laurence V.
CPC classification number: B22C1/20
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