04/02/2012

www.gupta-verlag.de/polyurethanes

NPE2012: Teknor Apex introduces new vinyl compounds with bio-based plasticizers

The new BioVinyl flexible vinyl compounds have already found commercial uses. Two of these are a line of flip-flop sandals produced in the United States by Okabashi Brands, Inc. and a range of shoe welting manufactured by custom extrusion processor Barbour Plastics, Inc. Applications for which Teknor Apex is prepared to supply commercial quantities of BioVinyl compounds include: Automotive window seals, interior and exterior trim, and instrument panel skins.Medical tubing, masks, and collection bags.Consumer products such as footwear and toys.According to business development manager Michael Roberts, development work continues on compounds for other applications, such as blood bags, and wire and cable jacketing. [image_0]Life cycle analysis tests conducted by Dow and reviewed by a third party indicate that every ton of vinyl compound made flexible with Ecolibrium helps to reduce carbon dioxide equivalent emissions by 0.7 ton, or 41%. "Because half of the PVC polymer is derived from seawater and typical plasticizer loadings are 33%, the substitution of the new plasticizers for conventional phthalates makes the carbon footprint of BioVinyl compounds dramatically smaller than that of many plastics,” said business development manager Michael Roberts. "Teknor Apex has compiled comparative data indicating that the global warming potential of BioVinyl compounds, in terms of CO2 emission equivalents, is half that of polyolefin resins and is even lower than that of PLA bioplastic. The cumulative energy demand of BioVinyl compounds, including feedstock and processing, is the lowest in comparison with a wide range of plastics.” Another advantage of BioVinyl compounds cited by Roberts is that the Dow plasticizers are derived from naturally occurring vegetable substances that are not used for food and so are unaffected by supply/demand forces impacting other bio-derived plastics feedstocks such as corn starch. Besides their contribution to sustainability compounds made with the biobased plasticizers are said to enhance compound properties. "The most pronounced property change that we discovered in comparison with conventional phthalate-plasticized compounds was an improvement in heat stability, enabling extrusion processors to carry out longer product runs without prohibitive levels of polymer degradation,” said senior development chemist Nicole Marshall. "In addition, compounds that we developed for weatherstripping and gasketing showed significantly less color change than standard vinyl after accelerated weathering.” Teknor Apex researchers also found that the Dow bio-based plasticizer exhibited greater plasticizing efficiency than most common phthalates. "In preparing developmental BioVinyl grades, we were able to use less plasticizer to obtain the same level of flexibility as in corresponding phthalate-based compounds,” Marshall said.

www.gupta-verlag.de/polyurethanes