PLASTIC TRENDS INC. - The pipe fittings maker in Shelby Township, near Sterling Heights, Mich., named three sales vice presidents: Jim Porteous, waterworks; Rick Hanger, plumbing and industrial; and David Wheater, U.S. pipe division. The firm is a subsidiary of Royal Group Technologies Ltd., based in Woodbridge, Ontario.
RICHCO INC. - Samantha Richardson, wife of co-founder and chairman Craig Richardson, has taken over for her husband, who died Oct. 3 from a heart attack at age 71.
SARNAFIL INC.-Richard Foley, president of the roof membrane producer in Canton, Mass., will retire May 31. Brian Whelan, vice president of sales and marketing, will replace Foley.
TYCO INTERNATIONAL LTD. - The diversified manufacturer in Pembroke, Bermuda, named David Robinson president of its plastics and adhesives group. That group produces plastic film, molded products, adhesives and laminates.
ZEON CHEMICALS LP - The Louisville, Ky., elastomer producer named Gary Grindrod president and chief executive officer.
* Industrial roll grinder firm PRECISION ROLL GRINDERS INC. of Allentown, Pa., named Bob Rourke national sales and marketing manager and Ernest LaBranche account manager. ... INVENSYS EUROTHERM INC., an automation and controls fim in Leesburg, Va., named Lee Jones regional sales director. ... Foam and corrugated packaging maker ALPHA PACKAGING SOLUTIONS INC. in Cincinnati named Ken Wise and Gary Brian senior account managers. President Rick Brian now is responsible for marketing. ... GRETAG- MACBETH LLC, a supplier of color-control software and instruments, named Donna Annacone sales director, Americas South. The firm is in New Windsor, N.Y. ... CAST NYLONS LTD., a custom shapes maker in Willoughby, Ohio, named Kurt Broll technical sales engineer. ... PET equipment maker ANKER SYSTEMS LTD. in Accrington, England, named Stephen Young technical sales director. ... PLASTICS DYNAMICS INC., a manufacturers' representative in Granger, Ind., named Jan Coulter territory saleswoman. ... Specialty polymers supplier P.D. GEORGE CO. of St. Louis named Gary Gray area sales manager for its varnish/compound unit. ... TEKNOR COLOR CO. of Pawtucket, R.I., named Donna Lottmann a sales representative.