Acrylic derivative of urea
    3.
    发明授权
    Acrylic derivative of urea 失效
    尿素丙烯酸衍生物

    公开(公告)号:US4999455A

    公开(公告)日:1991-03-12

    申请号:US345268

    申请日:1989-05-01

    CPC分类号: C07C275/14 C08G12/04

    摘要: New acrylic derivative of urea: monomethylolacrylamidomethyleneurea.Preparation process, according to which acrylamidomethyleneurea is reacted with formaldehyde.Application to the manufacture of additives suitable for use in aminoplastic resins.

    摘要翻译: 尿素新型丙烯酸衍生物:单甲基丙烯酰胺亚甲基脲。 丙烯酰胺亚甲基脲与甲醛反应制备方法。 适用于适用于氨基塑料树脂的添加剂的制造。

    Additives suitable for use in aminoplastic resins
    4.
    发明授权
    Additives suitable for use in aminoplastic resins 失效
    适用于氨基塑料树脂的添加剂

    公开(公告)号:US4977238A

    公开(公告)日:1990-12-11

    申请号:US443851

    申请日:1989-11-29

    IPC分类号: C08G12/40 C08G12/12 C08G12/22

    CPC分类号: C08G12/22

    摘要: Precondensates of urea and formaldehyde containing monomethylolacrylamidomethyleneurea are produced from pure acrylamidomethyleneurea and urea/formaldehyde precondensate or from the starting substances used for the manufacture of acrylamidomethyleneurea with formaldehyde. They are useful additives for aminoplastic resins, which in turn may be used as glue in the manufacture of chipboard sheets.

    摘要翻译: 尿素和含甲醛的单羟甲基丙烯酰胺亚甲基脲的预缩合物由纯丙烯酰胺基亚甲基脲和脲/甲醛预缩合物或用于制备丙烯酰胺基亚甲基脲与甲醛的起始物质制备。 它们是用于氨基塑料树脂的有用添加剂,其又可以用作制造刨花板片材中的胶水。

    Process for the manufacture of urea-formaldehyde resins
    5.
    发明授权
    Process for the manufacture of urea-formaldehyde resins 失效
    脲醛树脂制造工艺

    公开(公告)号:US5034500A

    公开(公告)日:1991-07-23

    申请号:US289103

    申请日:1988-12-23

    IPC分类号: C08G12/12 C08L61/24

    摘要: Urea-formaldehyde resins, particularly useful for producing particle boards having lower rates of release of formaldehyde are synthesized in several stages including a stage of further condensing a first condensate having a F/U molar ratio of 1.8-2.3 and which was condensed at a pH of between 6 and 8. The further condensing is conducted at a pH of between 6 and 8 until a cloud point with water is reached at 10.degree.-40.degree. C. making it possible to obtain resins which are reactive and stable during storage.

    摘要翻译: 尤其可用于生产具有较低甲醛释放速率的刨花板的脲醛树脂在几个阶段中合成,包括进一步浓缩F / U摩尔比为1.8-2.3的第一缩合物的阶段,并将其在pH 在6和8之间进行进一步的冷凝,其pH在6和8之间进行,直至在10℃-40℃达到浊点,才能获得在储存过程中反应性和稳定性的树脂。

    Process for manufacturing urea/formaldehyde resins
    6.
    发明授权
    Process for manufacturing urea/formaldehyde resins 失效
    制造尿素/甲醛树脂的方法

    公开(公告)号:US4977237A

    公开(公告)日:1990-12-11

    申请号:US442863

    申请日:1989-11-29

    IPC分类号: C08G12/12 C08G12/40

    CPC分类号: C08G12/12

    摘要: New process for manufacturing urea/formaldehyde resins.New process, according to which a urea/formaldehyde precondensate containing monomethylolacrylamidomethyleneurea is added to the urea/formaldehyde resins.Applications for the gluing of wood, in aminoplastic resins.

    摘要翻译: 制造尿素/甲醛树脂的新工艺。 根据该方法,将含有单羟甲基丙烯酰胺亚甲基脲的脲/甲醛预缩合物加入到脲/甲醛树脂中。 用于粘合木材,在氨基塑料树脂中的应用。