发明名称 |
FORFARANDE FOR FORHINDRANDE AV SKUMBILDNING VID AVLEGSNANDE AV RESTMONOMERER FRAN VATTENHALTIGA POLYMERDISPERSIONER AV VINYLKLORIDHALTIGA POLYMERER |
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. |
申请公布号 |
SE441274(B) |
申请公布日期 |
1985.09.23 |
申请号 |
SE19780010326 |
申请日期 |
1978.10.02 |
申请人 |
WACKER-CHEMIE GMBH |
发明人 |
1)K * ROSTOCK;2)H * BIRKE;3)R * WIEDHOLZ;4)J * BAUER;5)T * BALWE |
分类号 |
C08F214/00;C08F6/00;C08F6/06;C08F6/16;C08F14/00;C08F214/06;(IPC1-7):C08F6/16;C08F6/24 |
主分类号 |
C08F214/00 |
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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