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Metabolix To Present Data Showing That New Biobased PHA Polymeric Modifiers Significantly Improve Performance Characteristics Of PVC

Metabolix, Inc. (NASDAQ: MBLX), an innovation-driven bioscience company focused on delivering sustainable solutions for plastics, chemicals and energy, today announced that new biobased PHA (polyhydroxyalkanoate) copolymers significantly improve the mechanical and environmental performance characteristics of polyvinyl chloride (PVC). PVC is a polymer with a diverse use pattern ranging from construction materials to medical applications and an estimated global demand of approximately 35 million metric tons per year. Dr. Yelena Kann, Ph.D., senior polymer scientist at Metabolix, will present the findings in a presentation titled “New Biobased PHA Rubber Copolymers for PVC Modification” at the Society of Plastics Engineers’ Vinyltec 2012 conference on Wednesday, October 24, 2012.

Metabolix developed a series of PHA copolymers and demonstrated that they were miscible with PVC resins. Based on miscibility and performance requirements, Metabolix researchers created specific compositions of PHA copolymers to improve plasticization, impact and processing modification of rigid and flexible PVC.
  • In plasticization, PHA copolymers performed as high molecular weight, readily dispersible plasticizers and enabled formulation of compounds with low additive migration, low extractables, volatile loss and staining.
  • In impact modification, PHA rubber copolymers outperformed the best available MBS core/shell impact modifiers and did not compromise PVC transparency or UV stability.
  • As a processing aid, the metal-adhering properties of PHA copolymers promoted homogeneous shear melting of PVC particles and prevented overheating and degradation.

Together, the results demonstrate that these newly developed biobased PHA copolymers can produce significant improvements in the modification and processing of PVC.

“The significant performance benefits PVC gained from blending with PHA copolymers underscores the versatility and value of Metabolix’s PHA technology,” said Oliver Peoples, chief scientific officer and vice president of research at Metabolix. “These developments will allow us to broaden the addressable market opportunity for our materials, beyond our traditional focus on those markets requiring biodegradation.”

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