Process for the preparation of polyvinylbutyral having improved
properties
    1.
    发明授权
    Process for the preparation of polyvinylbutyral having improved properties 失效
    具有改进性能的聚乙烯醇缩丁醛的制备方法

    公开(公告)号:US4205146A

    公开(公告)日:1980-05-27

    申请号:US925873

    申请日:1978-07-18

    IPC分类号: C08F8/00 C08F8/28

    摘要: The preparation of polyvinylbutyral is commonly effected by the acetalization of polyvinyl alcohol with n-butyraldehyde, either in an organic solvent or in water. By varying the reaction conditions it is possible to obtain the polyvinylbutyral in a coarse-grain or fine-grained form. The production of polyvinylbutyral having improved properties is possible by using a polyvinylbutyral having a content of from 17 to 24% by weight of vinyl alcohol units as starting material for an after-treatment in the presence of an organic sulfonic acid having an emulsifying effect. The polyvinylbutyral obtained is particularly suitable for the manufacture of compound sheets.

    摘要翻译: 聚乙烯醇缩丁醛的制备通常通过聚乙烯醇与正丁醛在有机溶剂或水中的缩醛化来实现。 通过改变反应条件,可以获得粗粒或细粒形式的聚乙烯醇缩丁醛。 具有改进性能的聚乙烯醇缩丁醛的生产可以通过使用含有17-24%(重量)乙烯醇单元的聚乙烯醇缩丁醛作为在具有乳化作用的有机磺酸存在下进行后处理的原料。 所得聚乙烯醇缩丁醛特别适用于复合片材的制造。

    Plasticizer containing polyvinylbutyral sheets having a reduced adhesion
to glass
    5.
    发明授权
    Plasticizer containing polyvinylbutyral sheets having a reduced adhesion to glass 失效
    含有与玻璃的粘合性降低的聚乙烯醇缩丁醛片的增塑剂

    公开(公告)号:US4161565A

    公开(公告)日:1979-07-17

    申请号:US841394

    申请日:1977-10-12

    摘要: Plasticizer containing polyvinylbutyral sheets are known intermediate layers for glass laminates. Generally, the polyvinylbutyral used for this application contains certain amounts of vinyl alcohol units and vinyl acetate units. In order to adjust an optimum adhesion to glass, certain additives are mixed with the polyvinylbutyral, which additives must not cause discoloration of the laminate and deterioration of the transparency. Betains are especially suitable anti-adhesives, and efficient in very small amounts.

    摘要翻译: 含有聚乙烯醇缩丁醛片的增塑剂是玻璃层压材料的已知中间层。 通常,用于该应用的聚乙烯醇缩丁醛含有一定量的乙烯醇单元和乙酸乙烯酯单元。 为了调节对玻璃的最佳粘合性,某些添加剂与聚乙烯醇缩丁醛混合,这些添加剂不会引起层压板的变色和透明度的劣化。 甜菜是特别合适的抗粘合剂,并且非常少量的高效。