Imasab SA de CV has sold its 50 per cent stake in polyester specialist KoSa to the company's other 50 per cent owners, Koch International Equity Investments BV and Koch Equities Inc - both of which are subsidiaries of Wichita, Kansas-based Koch Industries Inc.

"KoSa's mission is unchanged, that is, to be the leader in the polyester industry," said George Gregory, the company's chief executive officer.

"We are excited about the prospects of this transition and look forward to continued strong and close working relationships with our many customers," added Bill Caffey, KoSa's chairman of the board.

KoSa manufactures commodity and specialty polyester products as part of four global businesses: Packaging Resins, Technical Fibers, Textile Fibers and Intermediates and Polymer. The company is headquartered in Houston, Texas, and has regional offices in Charlotte, North Carolina, Frankfurt, Germany and Toluca, Mexico.