Air filter coating compositions containing mixture of silica and magnesium silicate gelling agents
    2.
    发明授权
    Air filter coating compositions containing mixture of silica and magnesium silicate gelling agents 失效
    含二氧化硅和硅酸镁胶体混合物的空气过滤器涂料组合物

    公开(公告)号:US3639280A

    公开(公告)日:1972-02-01

    申请号:US3639280D

    申请日:1967-09-28

    Applicant: FMC CORP

    CPC classification number: B01J20/22 B01D39/14 C07F9/12 Y10S516/922

    Abstract: This application discloses triorganic phosphate coating compositions for viscous-impingement air filters in which the triorganic phosphate is thickened by a combination of about 0.1 to 1.0 parts of a magnesium silicate, with at least 10 percent of its particles which are less than 1 micron in any dimension and whose silica to magnesia ratio is about 1.05 to about 1.30 to 1, and 0.1 to 3 parts of pyrogenic silica having a particle size no greater than 0.025 microns. These gel compositions have good high-temperature viscosity stability and exhibit low syneresis losses. Satisfactory gels can be prepared using as little as one percent pyrogenic silica with 0.5 percent of the magnesium silicate.

    Abstract translation: 本申请公开了用于粘性冲击空气过滤器的三有机磷酸盐涂料组合物,其中三有机磷酸盐通过约0.1至1.0份硅酸镁的组合而增稠,其中至少10%的颗粒在任何 尺寸,其二氧化硅与氧化镁比为约1.05至约1.30至1,和0.1至3份具有不大于0.025微米的粒度的热解二氧化硅。 这些凝胶组合物具有良好的高温粘度稳定性和低脱水收缩损失。 可以使用0.5%的硅酸镁使用少至1%的热解二氧化硅来制备令人满意的凝胶。

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