发明名称 |
PROCESSO PARA PREPARACAO DE POLIVINILBUTIRAL COM PROPRIEDADES APERFEICOADAS |
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. |
申请公布号 |
BR7804657(A) |
申请公布日期 |
1979.03.20 |
申请号 |
BR19787804657 |
申请日期 |
1978.07.19 |
申请人 |
HOECHST AG |
发明人 |
HUTTEN U;EBIGT J;HERMANN H |
分类号 |
C08F8/00;C08F8/28;(IPC1-7):C08F8/28 |
主分类号 |
C08F8/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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