Composition for odor suppression

Abstract

A composition for odor control includes (A) from 85 wt% to 99.5 wt% of an olefin-based compound and (B) from 15 wt% to 0.5 wt% of an odor suppressant. The odor suppressant includes a blend of (i) an ionomer, (ii) particles of zinc oxide, and (iii) particles of copper oxide. The composition has a methyl mercaptan odor suppression value of greater than 45% as measured in accordance with ASTM D5504-12.

Description

Background technique [0001] Many uses of articles made from olefin-based polymers suffer from unpleasant odors. Common sources of unpleasant odors include emissions of hydrogen sulfide (H 2 S) compositions and thiol-containing compositions. It is desirable in many applications to be able to remove or otherwise suppress the odor of olefin-based polymer articles. Therefore, many industries need to remove sulfur-based odorants (such as H 2 S and thiol) materials. A common example is the ability of plastic garbage bag liners (ie, olefin-based polymer articles) to remove odors. [0002] Particles of metal oxides such as zinc oxide (ZnO) and especially zinc salts are known to consume many odor-producing molecules such as H 2 S and thiols. All other factors being equal, it is well known that ZnO concentration is directly related to odor suppression - ie, as the ZnO concentration increases in a given olefin-based polymer article, so does the effectiveness of odor suppression. ...

AI Technical Summary

Problems solved by technology

High loading of ZnO particles also increases haze, which leads to reduced transparency and / or deterioration of film color in olefin-based polymer films

High loading of ZnO particles also adversely affects mechanical properties such as impact strength and film tear strength

Therefore, processing parameters and end-use mechanical requirements impose practical constraints on loading ZnO particles into olefin-based polymer compositions

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