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An investigation of the breakdown products of the curatives and antidegradants used to produce food contact elastomers

Project Code: A03038

08/03/2011

TNO BIBRA International Ltd.
Coulier, L ;
Rapra Technology
Forrest, M; Willoughby, B

A literature search has been carried out to obtain information on the known breakdown products of the curatives and antidegradants gioven in the inventory list of additives associated with the Council of Europe (CoE) Rubber Resolution. Additionally, the scope of the literature search included establishing the curative blends used in commercial food contact rubbers as it is common practice in rubber technology to combine two or more curatives to obtain optimum processing and product performance criteria, and because this affects the breakdown products used due to interactions. Over 40 examples of blends used in food contact rubbers were found and reported. From these literature searches it has been possible to predict over 900 possible breakdown products from the 161 curatives and antidegradants present in the CoE list.

This work has demonstrated the importance of considering reaction/breakdown products especially in complex materials such as food contact elastomers. It is clear that starting substances alone should not be considered as the only potential migrants when evaluating a food contact material.

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