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    LOW DUST GYPSUM WALLBOARD
    1.
    发明申请
    LOW DUST GYPSUM WALLBOARD 审中-公开

    公开(公告)号：US20190382311A1

    公开(公告)日：2019-12-19

    申请号：US16521072

    申请日：2019-07-24

    Applicant: United States Gypsum Company

    Inventor： Qiang YU ,  Weixin D. SONG

    IPC: C04B28/14 ,  B32B13/04 ,  B32B13/08 ,  B32B13/14 ,  B32B17/02 ,  B32B29/00 ,  B32B13/02

    Abstract: This invention provides low dust low density gypsum wallboard products having high total core void volumes, corresponding to low densities in the range of about 10 to 30 pcf. The wallboards have a set gypsum core formed between two substantially parallel cover sheets, the set gypsum core preferably having a total void volume from about 80% to about 92%, and made from a slurry including stucco, pregelatinized starch, and a naphthalenesulfonate dispersant. The combination of the pregelatinized starch and the naphthalenesulfonate dispersant also provides a glue-like effect in binding the set gypsum crystals together. The wallboard formulation, along with small air bubble voids (and water voids) provides dust control during cutting, sawing, routing, snapping, nailing or screwing down, or drilling of the gypsum-containing products. This invention also provides a method of making the low dust low density gypsum products including the introduction of soap foam in an amount sufficient to form a total void volume, including air voids, preferably from about 80% to about 92% in the set gypsum core, corresponding to a set gypsum core density from about 10 pcf to about 30 pcf. The wallboards produced by the method generate significantly less dust during working.

    LIGHT WEIGHT GYPSUM WALLBOARD
    7.
    发明申请
    LIGHT WEIGHT GYPSUM WALLBOARD 审中-公开
    轻量GYPSUM墙板

    公开(公告)号：US20160304397A1

    公开(公告)日：2016-10-20

    申请号：US15198122

    申请日：2016-06-30

    Applicant: United States Gypsum Company

    Inventor： Qiang YU ,  Weixin D. SONG ,  Michael R. LYNN

    IPC: C04B11/00 ,  C04B24/22 ,  C04B22/16 ,  C04B24/38

    CPC classification number: C04B11/00 ,  C04B22/16 ,  C04B24/226 ,  C04B24/383 ,  C04B28/14 ,  C04B2103/0045 ,  C04B2103/408 ,  C04B2111/0062 ,  Y02W30/97 ,  Y10T428/249953 ,  Y10T428/2978 ,  Y10T428/31971 ,  Y10T428/31993 ,  Y10T442/665 ,  C04B14/42 ,  C04B18/24

    Abstract: The invention generally provides gypsum-containing slurries including stucco, naphthalenesulfonate dispersant, and pregelatinized starch. The naphthalenesulfonate dispersant is present in an amount of about 0.1% -3.0% by weight based on the weight of dry stucco. The pregelatinized starch present in an amount of at least about 0.5% by weight up to about 10% by weight of pregelatinized starch by weight based on the weight of dry stucco in the formulation. Other slurry additives can include trimetaphosphate salts, accelerators, binders, paper fiber, glass fiber, and other known ingredients. The invention also comprises the gypsum-containing products made with such slurries, for example, gypsum wallboard, and a method of making gypsum wallboard.

    Abstract translation: 本发明通常提供含石膏，萘磺酸盐分散剂和预胶化淀粉的含石膏的浆料。 基于干灰泥的重量，萘磺酸盐分散剂的存在量为约0.1重量％至3.0重量％。 所述预胶凝淀粉以基于制剂中干灰泥重量的重量计至少约0.5重量％至至多约10重量％的预胶化淀粉的量存在。 其它浆料添加剂可以包括三偏磷酸盐，促进剂，粘合剂，纸纤维，玻璃纤维和其它已知成分。 本发明还包括用这种浆料制成的含石膏的产品，例如石膏墙板，以及制造石膏墙板的方法。

    LIGHT WEIGHT GYPSUM BOARD
    8.
    发明申请
    LIGHT WEIGHT GYPSUM BOARD 审中-公开
    轻重量塑胶板

    公开(公告)号：US20140186643A1

    公开(公告)日：2014-07-03

    申请号：US14198463

    申请日：2014-03-05

    Applicant: United States Gypsum Company

    Inventor： Qiang YU ,  Weixin D. SONG ,  Michael R. LYNN

    IPC: C04B28/14

    CPC classification number: C04B11/00 ,  C04B22/16 ,  C04B24/226 ,  C04B24/383 ,  C04B28/14 ,  C04B2103/0045 ,  C04B2103/408 ,  C04B2111/0062 ,  Y02W30/97 ,  Y10T428/249953 ,  Y10T428/2978 ,  Y10T428/31971 ,  Y10T428/31993 ,  Y10T442/665 ,  C04B14/42 ,  C04B18/24

    Abstract: The invention generally provides gypsum-containing slurries including stucco, naphthalenesulfonate dispersant, and pregelatinized starch. The naphthalenesulfonate dispersant is present in an amount of about 0.1%-3.0% by weight based on the weight of dry stucco. The pregelatinized starch is present in an amount of at least about 0.5% by weight up to about 10% by weight of pregelatinized starch by weight based on the weight of dry stucco in the formulation. Other slurry additives can include trimetaphosphate salts, accelerators, binders, paper fiber, glass fiber, and other known ingredients. The invention also comprises the gypsum-containing products made with such slurries, for example, gypsum wallboard, and a method of making gypsum wallboard.

    Abstract translation: 本发明通常提供含石膏，萘磺酸盐分散剂和预胶化淀粉的含石膏的浆料。 基于干灰泥的重量，萘磺酸盐分散剂的存在量为约0.1重量％至3.0重量％。 基于制剂中干灰泥的重量，预胶化淀粉的存在量为预胶化淀粉的至少约0.5重量％至多约10重量％。 其它浆料添加剂可以包括三偏磷酸盐，促进剂，粘合剂，纸纤维，玻璃纤维和其它已知成分。 本发明还包括用这种浆料制成的含石膏的产品，例如石膏墙板，以及制造石膏墙板的方法。

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