Barrier Additves
A barrier additive is an additive that improves barrier properties or reduces permeability to certain chemicals such as oxgen or carbon dioxide. (RDC 3/10/2011)
"L. M. Robeson and J. A. Faucher disclose in J. Polymer Science, Part B 7, 35-40 (1969) that certain additives can be incorporated into polymers to increase their modulus and gas barrier properties through an antiplasticization mechanism. This article discloses utilizing additives with polycarbonate, polyvinyl chloride, polyphenylene oxide, and polythyelene oxide."
"In WO 01/12521, Plotzker et al. propose the use of additives selected from 4-hydroxybenzoates and related molecules to increase the gas barrier properties of PET."
Recent US Patents
10/26/2010
7,820,258
Container and composition for enhanced gas barrier properties
Shi et al of the Coca Cola Company, Georgia has developed container comprising a polyester composition with enhanced carbon dioxide and oxygen barrier properties. This polyester contains to 3 to 10 wt% of a purine derivative (barrier additive). (RDC 2/15/2011)