Method of water dispersing pregelatinized starch in making gypsum products
    68.
    发明申请
    Method of water dispersing pregelatinized starch in making gypsum products 有权
    水分散预胶化淀粉制备石膏产品的方法

    公开(公告)号:US20070251628A1

    公开(公告)日:2007-11-01

    申请号:US11413528

    申请日:2006-04-28

    申请人: Qiang Yu Weixin Song

    发明人: Qiang Yu Weixin Song

    IPC分类号: B32B13/00

    摘要: The invention provides in one embodiment a gypsum-containing slurry including stucco and an aqueous pre-dispersion of a pregelatinized starch. Also provided is a method of making gypsum wallboard by providing a pre-dispersion of the pregelatinized starch in water, and adding the pregelatinized starch pre-dispersion to the gypsum-containing slurry. The pregelatinized starch can have a particle size distribution within the following range: d (0.1)=about 20μ-35μ, d (0.5)=about 60μ-110μ, d (0.9)=about 100μ-220μ.

    摘要翻译: 本发明在一个实施方案中提供了包含灰泥和预胶化淀粉的预分散水的含石膏浆料。 还提供了通过提供预胶化淀粉在水中的预分散并将预胶化淀粉预分散体加入到含石膏浆料中来制备石膏墙板的方法。 预胶化淀粉的粒度分布可以在以下范围内:d(0.1)=约20mu-35mu,d(0.5)=约60mu-110mu,d(0.9)=约100mu-220mu。

    Gypsum compositions with enhanced resistance to permanent deformation
    70.
    发明授权
    Gypsum compositions with enhanced resistance to permanent deformation 有权
    具有增强的抗永久变形的石膏组合物

    公开(公告)号:US06409824B1

    公开(公告)日:2002-06-25

    申请号:US09557721

    申请日:2000-04-25

    IPC分类号: C04B1100

    摘要: A set gypsum-containing composition is disclosed. In one aspect, the set gypsum-containing composition includes an interlocking matrix of the set gypsum formed from at least calcined gypsum, water, and an enhancing material. The enhancing material can be selected from (i) an organic polyphosphonic compound, or a mixture thereof; (ii) a borate selected from ulexite colemanite, or a mixture thereof; or a mixture of (i) and (ii). In another aspect, the set gypsum-containing composition is treated with an enhancing material which can be selected from (i) an organic phosphonic compound or a mixture thereof; (ii) a borate selected from ulexite, colemanite, or a mixture thereof; (iii) a carboxylic compound or a mixture thereof; or a mixture of (i), (ii) and/or (iii).

    摘要翻译: 公开了一种含石膏的组合物。 在一个方面,所述含石膏组合物包括由至少煅烧的石膏,水和增强材料形成的所述石膏的互锁基质。 增强材料可以选自(i)有机多膦酸化合物或其混合物; (ii)选自乌来石钙质石的硼酸盐或其混合物; 或(i)和(ii)的混合物。 在另一方面,所述含石膏组合物用增强材料处理,所述增强材料可以选自(i)有机膦酸化合物或其混合物; (ii)选自乌来石,钴黑石或其混合物的硼酸盐; (iii)羧酸化合物或其混合物; 或(i),(ii)和/或(iii)的混合物。