US Patent 7790804 Process for stripping polymer polyols
Patent 7790804 was granted and assigned to Bayer MaterialScience on September, 2010 by the United States Patent and Trademark Office.
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Patent abstract
The invention provides a process for the purification of polymer polyols that ensures a reduction of acrylonitrile, styrene as well as the residual amounts of optionally used chain regulator, and of occurring recombination products of the initiator when azo initiators are used, to levels of <25 ppm of acrylonitrile, <50 ppm styrene, <50 ppm chain regulator and <280 ppm of recombination products by stripping using packed columns.
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US Patent 07790804 Process for stripping polymer polyols US Patent 7790804 Process for stripping polymer polyols
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Patent Number
0779080400
Patent Number
779080400
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
077908040
Date of Patent
September 7, 2010
0Patent Application Number
118214560
Date Filed
June 22, 2007
0Official Website
Patent Primary Examiner
Edits on 22 Sep, 2022
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
077908040
Date of Patent
September 7, 2010
0Patent Application Number
118214560
Date Filed
June 22, 2007
0Official Website
Patent Primary Examiner
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US Patent 07790804 Process for stripping polymer polyols
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07790804
Date of patent
September 7, 2010
Patent application number
11821456
Date Filed
June 22, 2007
Patent primary examiner
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