Cold set phenol-formaldehyde resin
    1.
    发明授权
    Cold set phenol-formaldehyde resin 失效
    冷定型酚醛树脂

    公开(公告)号:US4311619A

    公开(公告)日:1982-01-19

    申请号:US139304

    申请日:1980-04-14

    IPC分类号: B22C1/22 C08G8/04 C08G8/10

    CPC分类号: C08G8/04 B22C1/2253

    摘要: A phenol-aldehyde resin useful in such applications as a cold-set binder for cores and molds used in the foundry industry and reactive prepolymers used in reaction injection molding compositions produced by the steps of reacting a phenol and aldehyde in a mole ratio of 1 to 1-2.3 in the presence of catalytic amounts of an organic compound of aluminum, zirconium or titanium.

    摘要翻译: 可用于铸造工业中使用的用于芯和模具的冷定型粘合剂和反应性注射成型组合物中使用的反应性预聚物的酚醛树脂,其通过以下步骤制备:将酚和醛以摩尔比1与 1-2.3在催化量的铝,锆或钛的有机化合物的存在下进行。

    Process for preparing cores and molds
    4.
    发明授权
    Process for preparing cores and molds 失效
    制备核心和模具的工艺

    公开(公告)号:US4445565A

    公开(公告)日:1984-05-01

    申请号:US512252

    申请日:1983-07-11

    IPC分类号: B22C1/18

    CPC分类号: B22C1/185

    摘要: A combination binder and hardener therefor for a foundry aggregate wherein a linear metal polyphosphate or ammonium polyphosphate is used as the binder, the hardener is a mixture of phosphoric acid and a source of polyvalent metal cations.

    摘要翻译: 用于铸造骨料的组合粘合剂和硬化剂,其中使用线性金属多磷酸盐或多磷酸铵作为粘合剂,所述固化剂是磷酸和多价金属阳离子源的混合物。