Clariant launches new CESA® ProTect brand oxygen scavenger additives for polyester packaging

Clariant launches new CESA ProTect brand oxygen scavenger additives for polyester packaging. 
  • Unmatched shelf-life extension for packaged food and beverages
  • Bottles for fruit juice and beer are large target markets
  • Combines enhanced food protection with sustainable packaging design

Muttenz, October 21, 2019 – Clariant, a focused, innovative and entrepreneurial specialty chemical company, today announced the creation of a new brand of patent protected oxygen scavenger additive masterbatches – CESA ProTect.

The primary target market for the new additive masterbatch is monolayer polyethylene terephthalate (PET) packaging, although it may also be beneficial for other polyester-based materials. Well known for its ubiquitous use in soft-drink and water bottles, PET has many advantages. Compared to other polymers, it has excellent transparency, is food contact compliant, easy to process and it is the most recycled polymer today.

“PET is already a good barrier material,” notes Antonello Decortes, Global Product Manager at Clariant, “but sensitive applications may still suffer from oxygen inlet. This is not a problem for water or most carbonated soft drinks, but fruit juices lose vitamin potency and undergo a color shift, dairy products can sour, coffee capsules suffer flavor loss, and as little as 1 ppm of oxygen can change the taste and odor of beer. CESA ProTect additives can help extend the shelf life of these products and ensure that less food is thrown away.”

The active ingredients in CESA ProTect masterbatches do not slow down penetration of oxygen through the container’s PET wall. Instead, it is an “oxygen scavenger,” which absorbs O2 molecules as they enter so they cannot reach the protected product.

CESA ProTect is active only after processing, and PET-treated containers are protected after production and can be filled and shipped. CESA ProTect is also suitable for cold chain distribution as it has perfomed well when used on refrigerated products.

Exactly how long CESA ProTect additive masterbatches can protect food and beverages, Decortes says, depends on a number of factors, including additive loading, package size and design. In testing of a 23g, 0.5-liter bottle, a 3,6% loading of CESA ProTect masterbatch successfully held oxygen levels below 1 ppm for 588 days or more than 18 months. In contrast, untreated PET maintained levels below 1 ppm for just 22 days, and a competitive oxygen scavenger lasted just 63 days. Even at a loading of 2%, CESA ProTect masterbatches were found to be effective for 266 days.

“Based on these test results,” says to Alessandro Dulli, Global Head of Segment and Business Development, Packaging, “we believe that CESA ProTect is one of the most powerful oxygen-scavenging masterbatch on the market.”

CESA ProTect masterbatch also appears to have little, if any, impact on appearance or mechanical properties of the packaging. When CESA ProTect is used at recommended dosages, finished containers of different sizes and shapes maintain a level of transparency in line with market expectations. The product is highly compatible with PET and does not appear to impact processing. Food contact approvals are pending.

To discover more on how Clariant is supporting a circular economy for plastics through sustainable innovations and collaborations, please visit us in hall 8A, booth J11. Our press kit is available for download on


Request to Clariant

Please enter your contact information so we are able to process your request. Thank you for your interest.

Stefanie Nehlsen
Stefanie Nehlsen
Global Trade Media Relations
+41 61 469 63 63
This information corresponds to the present state of our knowledge and is intended as a general description of our products and their possible applications. Clariant makes no warranties, express or implied, as to the information’s accuracy, adequacy, sufficiency or freedom from defect and assumes no liability in connection with any use of this information. Any user of this product is responsible for determining the suitability of Clariant’s products for its particular application.<br />
<br />
* Nothing included in this information waives any of Clariant’s General Terms and Conditions of Sale, which control unless it agrees otherwise in writing. Any existing intellectual/industrial property rights must be observed. Due to possible changes in our products and applicable national and international regulations and laws, the status of our products could change. Material Safety Data Sheets providing safety precautions, that should be observed when handling or storing Clariant products, are available upon request and are provided in compliance with applicable law. You should obtain and review the applicable Material Safety Data Sheet information before handling any of these products. For additional information, please contact Clariant.<br />
<br />
* For sales to customers located within the United States and Canada the following applies in addition: No express or implied warranty is made of the merchantability, suitability, fitness for a particular purpose or otherwise of any product or service.<br />
<br />
© Trademark of Clariant registered in many countries.<br />
® 2019 Clariant International Ltd 

You are about to leave the Clariant domain

The link you activated will take you outside the Clariant site in about 10 seconds. If you want to stop this, press "Cancel".