CLARIANT MASTERBATCHES NORTH AMERICA - The color concentrates maker in Holden, Mass., named Kirk Jacobs business director of additive masterbatches.
COPERION GROUP - The maker of compounding extruders in Stuttgart, Germany, named Gunter Bachmann chief executive officer.
EPDM ROOFING ASSOCIATION - The trade group in Bethesda, Md., named Kathy Prunty associate executive director. Prunty previously was member services director for the Polyisocyanurate Insulation Manufacturing Association in Bethesda, Md.
GAS INJECTION WORLDWIDE LTD. - The supplier of gas-assisted molding equipment in Hong Kong named Terry Pearson chairman. Pearson was chairman of Cinpres Gas Injection Ltd.
HYBRID PLASTICS INC. - The maker of Poss-brand nanomaterials in Hattiesburg, Miss., named Chris DeArmitt chief scientist. He had been with BASF AG in Ludwigshafen, Germany.
INDUSTRIAS ROMI SA - The maker of injection molding machines and tools in Santa Barbara D'Oeste, Brazil, named Livaldo Aguiar dos Santos chief executive officer.
LONDON METAL EXCHANGE - Neil Banks, development director for the nonferrous metals and plastics futures market in London, plans to retire in mid-September.
PLASTICOLORS INC. - The supplier of pigment and chemical dispersions in Ashtabula, Ohio, named Mark Przybysz chief financial officer.
SOLO CUP CO. - The disposable food-service product manufacturer in Highland Park, Ill., named Ronald Wesel vice president of food-service marketing, Wesel was previously with Pregis Corp.
SOUTHEAST RECYCLING DEVELOPMENT COUNCIL INC. - The trade group in Cantonment, Fla., named Diane Davis executive director.
TREX CO. INC. - Paul Fletcher is resigning effective Sept. 7 as senior vice president and chief financial officer of the manufacturer of composite decking and railing in Winchester, Va. The company is looking for a replacement.
W. AMSLER EQUIPMENT INC. - The maker of PET stretch blow molding equipment in Richmond Hill, Ontario, named Bob Milne U.S. sales coordinator and Heidi Amsler sales manager.
ENTHONE INC., a specialty chemicals supplier in West Haven, Conn., named Bioh Kim process integration manager for electronic materials. ... Allen Trent retired as Southeast sales consultant for MARTIN AUTOMATIC INC., an auxiliary equipment maker in Rockford, Ill. The company named Craig Thomson southern regional manager. ... UNITED GROUP, a Monroe, La., marketing and sales consortium of product distributors, named Jeff Albritton chief financial officer.