Resin binders for foundry molding sands
    1.
    发明授权
    Resin binders for foundry molding sands 失效
    铸造型砂用树脂粘合剂

    公开(公告)号:US4585809A

    公开(公告)日:1986-04-29

    申请号:US579148

    申请日:1984-02-10

    CPC分类号: C04B26/04 B22C1/222

    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。