Aromatic diamino carbonic acid esters
    2.
    发明授权
    Aromatic diamino carbonic acid esters 失效
    芳香二氨基碳酸酯

    公开(公告)号:US3929863A

    公开(公告)日:1975-12-30

    申请号:US17138171

    申请日:1971-08-12

    Applicant: BAYER AG

    CPC classification number: C08G18/3868 C08G18/10 C08G18/3243 C08G18/3855

    Abstract: Novel aromatic diamines having the general formula

    WHEREIN N IS AN INTEGER OF FROM 2 TO 8, X is sulfur or oxygen, and R is an n-valent hydrocarbon radical which may be interrupted by O or S atoms and which is obtained by removing OH or SH groups from a polyol or polythiol having a molecular weight of less than 600, are prepared by reacting a compound having the formula (HX)nR where X, n and R are as defined above with about nequivalents of an isatoic acid anhydride in the presence of a strong base. The aromatic diamines of the invention are particularly useful as the active hydrogen containing component for reaction with polyisocyanates in the preparation of synthetic resins by the isocyanate-polyaddition process.

    Abstract translation: 新型芳族二胺,具有通式为:其中2为8的整数,X为硫或氧,R为可被O或S原子间隔的n价烃基,其通过除去OH或 通过使具有式(HX)n R的化合物,其中X,n和R如上所定义的化合物与约n当量的丙酮酸酐反应制备分子量小于600的多元醇或多硫醇的SH基团 存在强大的基础。 本发明的芳族二胺在通过异氰酸酯加聚方法制备合成树脂时,特别适用于与多异氰酸酯反应的含活性氢成分。

    Blowing agents
    3.
    发明授权
    Blowing agents 失效
    发泡剂

    公开(公告)号:US3725321A

    公开(公告)日:1973-04-03

    申请号:US25693372

    申请日:1972-05-25

    Applicant: BAYER AG

    CPC classification number: C08J9/101 C08J9/06 Y10S264/05

    Abstract: The invention relates to the use of 2,4-dioxo-1,2-dihydro-4Hbenzoxazine as well as derivatives therefrom as blowing agents for the production of cellular and porous articles. These compounds do not liberate any corrosive, discolorizing, malodorous or toxic decomposition products.

    Abstract translation: 本发明涉及2,4-二氧代-1,2-二氢-4H-苯并恶嗪及其衍生物作为生产细胞和多孔制品的发泡剂。 这些化合物不会释放任何腐蚀性,变色,恶臭或有毒的分解产物。

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