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From Science & Research

From Science & Research • Copolymerization of the extracted cutin with selected petrochemicals raw materials With the copolymerization some standard polyester resins have been copolimerized with the extracted raw cutin (10% and 20%) and the resultant resins have been characterized. Development and application of the Biocopac lacquer Different formulations of lacquer containing from 10 to 100% of cutin have been prepared and characterized in order to find the best formulations for the final bio-lacquer. The more promising formulations have been applied on different metallic substrates (tinplate, tin free steel and aluminium) and some properties such as degree of curing, appearance, sterilization’s resistance were measured. The first results obtained with at least two formulations, showed good values of chemical resistance (MEK - Methyl Ethyl Ketone - test), good adherence (tape test), good mechanical properties and a good resistance to thermal sterilization in water. Production of cans and caps Based on the first best formulations, sheets of tinplate and aluminium have been lacquered. From these lacquered sheets it has been possible to produce two piece cans, crown corks and caps. In all cases the lacquer didn’t show adherence’s loss, rather it has showed a good behaviour in all the products obtained as it can be seen in Fig. 5. Conclusions All these first results are considered very satisfactory and from these first results the researchers are optimistic about the possibility of realize a natural lacquer and chances of getting a polymeric film obtained from tomatoes are becoming a reality. Fig. 5: Samples of cans and caps lacquered with varnish. [1] J. Graça and P Lamosa, ”Linear and Branched Poli (ω-hydroxyacid) Esters in Plant cutin”, J. Agric. Food Chem. 2010,58,9666-9674. [2] J.C. Saam, “Low temperature polycondensation of carboxylic acids and carbinols in heterogeneous media”, J. Polym. Sci., Part A: Polym. Chem.; 1998, 36, 341-356. [3] J.J. Benìtez, R. Garcìa-Segura, A. Heredia, “Plant biopolyester cutin: a tough way to its chemical synthesis”, Biochim. Biophys. Acta; 2004, 1674, 1-3. [4] J.A. Heredia-Guerrero, A. Heredia, R. Garcìa-Segura, J.J. Benìtez, “Synthesis and characterization of a plant cutin mimetic polymer”, Polymer, 2009, 50, 5633-5637 [5] D. Arrieta-Baez, M. Cruz-Carrillo, M. B. Gòmez-Patino, L. G. Zepeda-Vallejo, “ Derivatives of 10,16-dihydroxyhexadecanoic acid isolated from tomato (Solanum lycopersicum) as potential material for aliphatic polyesters”; Mol., 2011, 16, 4923-4936. [6] European patent application EP 2 371 805 A1 “Method for the application of oligo- and polyesters from a mixture of carboxylic acids obtained from suberin and/or cutin and their use thereof” published by VTT Technical Research Centre of Finland on the 5th November 2011. [7] Società Italiana Pirelli, Brevetto per invenzione industriale N° 389360 “Vernici a base di resina estratta dalle bucce di pomodoro” ,1944 A significantly more comprehensive version of this article with more results and details about the project can be downloaded from The project partners: • Stazione Sperimentale per l’Industria delle Conserve Alimentari (IT – RTD Performer) • Centro Tecnologico Agroalimentario Extremadura (ES – RTD Performer) • Fundacion TECNALIA Research & Innovation (ES – RTD Performer) • SYNPO A.S. (CZ – RTD Performer) • Salchi Metalcoat S.r.l. (IT – lacquer manufacturer) • Chiesa Virginio Azienda Agricola (IT – livestock & biogas producer) • Conservas Martinete S.A. (ES – manufacturer of canned tomato) • National Can Hellas S.A. (GR – metal packing) • Rodolfi Mansueto S.p.A. (IT – transformation of tomatoes) • Schekolin AG (LI – manufacturer of lacquers) • Saupiquet S.A.S. (FR – canned seafood producer) 26 bioplastics MAGAZINE [03/13] Vol. 8

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