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公开(公告)号:US4585809A
公开(公告)日:1986-04-29
申请号:US579148
申请日:1984-02-10
IPC分类号: B22C1/22 , C04B26/04 , C08F220/04 , C08L33/02 , C08L33/04 , C09J133/02 , C08K3/36 , C09K3/00
摘要: An aqueous dispersion of a copolymer comprising:(A) from 20 to 90 percent by weight of an unsaturated carboxylic acid of the formula ##STR1## where R.sub.1, R.sub.2, R.sub.3 are hydrogen, alkyl, or --(CH.sub.2).sub.n COOM and M is a proton or an alkali metal or alkaline earth metal or an ammonium cation, and(B) from 10 to 80 percent of at least one other comonomer different from and copolymerizable with A; methods of making a ready-to-use foundry molding sand by mixing such a dispersion with sand; and such ready-to-use foundry molding sands.
摘要翻译: 共聚物的水分散体,其包含:(A)20至90重量%的下式的不饱和羧酸,其中R 1,R 2,R 3为氢,烷基或 - (CH 2)n COOM,M为 质子或碱金属或碱土金属或铵阳离子,和(B)10%至80%的至少一种不同于且可与A共聚的其它共聚单体; 通过将这种分散体与砂混合来制备即用型铸造型砂的方法; 和这种即用型铸造型砂。