公开(公告)号：US4224437A

公开(公告)日：1980-09-23

申请号：US944404

申请日：1978-09-21

申请人： Kai Rostock ,  Johann Birke ,  Rudolf Wiedholz ,  Johann Bauer ,  Thomas Balwe

发明人： Kai Rostock ,  Johann Birke ,  Rudolf Wiedholz ,  Johann Bauer ,  Thomas Balwe

IPC分类号： C08F214/00 ,  C08F6/00 ,  C08F6/06 ,  C08F6/16 ,  C08F14/00 ,  C08F214/06 ,  C08F6/24

CPC分类号： C08F6/16

摘要： In the process for steam-stripping residual monomer from an aqueous polymer dispersion comprising injecting steam into an aqueous polymer dispersion containing residual monomers and the customary amounts of emulsifiers and/or protective colloids, said dispersion having a solids content of from 15% to 55% by weight with simultaneous evacuation of the gas space above the dispersion whereby said gas space is maintained at a subatmospheric pressure and said residual monomers are volatilized, the improvement consisting of injecting a sufficient volume of steam into said aqueous polymer dispersion whereby from 5% to 50% by weight of the injected steam passes through said dispersion uncondensed, thereby substantially preventing formation of foam above said dispersion.

摘要翻译： 在从含水聚合物分散体蒸汽汽提残余单体的方法中，包括将蒸汽注入含有残余单体的水性聚合物分散体和常规量的乳化剂和/或保护胶体中，所述分散体的固体含量为15％至55％ ，同时排出分散体上方的气体空间，由此所述气体空间保持在低于大气压的压力下，并且所述残余单体挥发，其改进包括将足够体积的蒸汽注入所述聚合物水分散体中，由此5％至50 注入蒸汽的重量％通过所述分散体未冷凝，从而基本上防止在所述分散体上形成泡沫。