Patent No. EP3864005 (titled "Solid Organic Peroxide Composition") was filed by Nouryon Chemicals on Oct 11, 2019. The application was issued on Dec 7, 2022.
This solid organic peroxide composition is designed for stable storage and transport in stainless steel containers by preventing corrosion caused by HCl fumes originating from residual chloroformates or acid chlorides. The composition comprises at least 40 wt% (total weight) of a room-temperature solid organic peroxide selected from peroxydicarbonates (e.g., dicetyl peroxydicarbonate) or diacylperoxides (e.g., dilauroyl peroxide). It further contains 0.001-5 wt% (based on the weight of the organic peroxide) of a room-temperature solid HCl scavenger, such as anionic clays (hydrotalcites or layered double hydroxides). The components may be physically mixed or added individually to the container. The composition is applicable for modifying polypropylene, specifically for producing high melt strength polypropylene (HMS-PP).

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