Anti-sagging gypsum product and a method to manufacture

    公开(公告)号:US10793472B2

    公开(公告)日:2020-10-06

    申请号:US14379730

    申请日:2012-12-03

    Abstract: The present invention provides a composition, a gypsum board and their preparation method and the use of ascorbic acid as an anti-sagging additive in a gypsum board. Said gypsum board comprises set gypsum prepared from the composition; while said composition comprises hemi-hydrate gypsum, water and a compound comprising group and no carboxylate groups. The set gypsum prepared from the said composition shows better anti-sagging or deformation resisting property. The gypsum board of the present invention is hardly distorted and has stronger stability even in the condition of high humidity, thus improve the quality of the gypsum board to meet the demands of the customer.

    Preparation method of (3S,4S)-3-hexyl-4-((R)-2-hydroxytridecyl)-oxetan-2-one and the product of that method
    4.
    发明授权
    Preparation method of (3S,4S)-3-hexyl-4-((R)-2-hydroxytridecyl)-oxetan-2-one and the product of that method 有权
    (3S,4S)-3-己基-4 - ((R)-2-羟基十三烷基) - 氧杂环丁烷-2-酮的制备方法和该方法的产物

    公开(公告)号:US08431726B2

    公开(公告)日:2013-04-30

    申请号:US12990111

    申请日:2008-05-26

    CPC classification number: C07D305/12 C07D213/70

    Abstract: The present invention relates to a method for the preparation of (3S,4S)-3-hexyl-4-((R)-2-hydroxytridecyl)-oxetan-2-one and a product of the method. The method includes the following steps: a) reducing a substance represented by formula (II) to obtain a substance represented by formula (III), and then oxidizing the substance represented by formula (III) to form a substance represented by formula (IV); b) acylating n-octanoic acid to obtain n-octanoyl chloride using thionyl dichloride, then condensing the obtained n-octanoyl chloride with 2-mercapto-pyridine under basic condition to form a substance represented by formula (V), and then converting the substance represented by formula (V) to a substance represented by formula (VI); c) reacting the substance obtained in the step a) with the substance obtained in the step b) under catalytic condition of Lewis acid to generate a substance represented by formula (VII), and then reacting with a Lewis acid. The meanings of the signs in these formulas are the same as those in the description.

    Abstract translation: 本发明涉及制备(3S,4S)-3-己基-4 - ((R)-2-羟基十三烷基)氧杂环丁烷-2-酮的方法和该方法的产物。 该方法包括以下步骤:a)还原由式(II)表示的物质以获得由式(III)表示的物质,然后氧化由式(III)表示的物质以形成由式(IV)表示的物质, ; b)用正辛酸酰化得到正辛酰氯,然后在碱性条件下将所得正辛酰氯与2-巯基 - 吡啶缩合形成式(Ⅴ)表示的物质,然后转化成物质 由式(Ⅴ)代表由式(Ⅵ)表示的物质; c)在路易斯酸的催化条件下,使步骤a)中获得的物质与步骤b)中获得的物质反应,生成由式(Ⅶ)表示的物质,然后与路易斯酸反应。 这些公式中的符号的含义与描述中的符号的含义相同。

    PREPARATION METHOD OF (3S,4S)-3-HEXYL-4-((R)-2-HYDROXYTRIDECYL)-OXETAN-2-0NE AND THE PRODUCT OF THAT METHOD
    10.
    发明申请
    PREPARATION METHOD OF (3S,4S)-3-HEXYL-4-((R)-2-HYDROXYTRIDECYL)-OXETAN-2-0NE AND THE PRODUCT OF THAT METHOD 有权
    (3S,4S)-3-甲基-4 - ((R)-2-羟基吡啶基) - 异-2-烯的制备方法及其制法

    公开(公告)号:US20110046400A1

    公开(公告)日:2011-02-24

    申请号:US12990111

    申请日:2008-05-26

    CPC classification number: C07D305/12 C07D213/70

    Abstract: The present invention relates to a method for the preparation of (3S,4S)-3-hexyl-4-((R)-2-hydroxytridecyl)-oxetan-2-one and a product of the method. The method includes the following steps: a) reducing a substance represented by formula (II) to obtain a substance represented by formula (III), and then oxidizing the substance represented by formula (III) to form a substance represented by formula (IV); b) acylating n-octanoic acid to obtain n-octanoyl chloride using thionyl dichloride, then condensing the obtained n-octanoyl chloride with 2-mercapto-pyridine under basic condition to form a substance represented by formula (V), and then converting the substance represented by formula (V) to a substance represented by formula (VI); c) reacting the substance obtained in the step a) with the substance obtained in the step b) under catalytic condition of Lewis acid to generate a substance represented by formula (VII), and then reacting with a Lewis acid. The meanings of the signs in these formulas are the same as those in the description.

    Abstract translation: 本发明涉及制备(3S,4S)-3-己基-4 - ((R)-2-羟基十三烷基)氧杂环丁烷-2-酮的方法和该方法的产物。 该方法包括以下步骤:a)还原由式(II)表示的物质以获得由式(III)表示的物质,然后氧化由式(III)表示的物质以形成由式(IV)表示的物质, ; b)用正辛酸酰化得到正辛酰氯,然后在碱性条件下将所得的正辛酰氯与2-巯基 - 吡啶缩合形成式(Ⅴ)表示的物质,然后转化成物质 由式(Ⅴ)代表由式(Ⅵ)表示的物质; c)在路易斯酸的催化条件下,使步骤a)中获得的物质与步骤b)中获得的物质反应,生成由式(Ⅶ)表示的物质,然后与路易斯酸反应。 这些公式中的符号的含义与描述中的符号的含义相同。

Patent Agency Ranking