PITTSBURGH--PPG Industries has made three new additions to the management team of its optical monomers group.

John Liebenguth has been named director, sales and marketing, optical monomers. Liebenguth will be responsible for all global sales and marketing activities of the optical monomers group, and will report to Christine Camsuzou, general manager, optical monomers.

Liebenguth's 25-year career with PPG spans various marketing management functions in the company's industrial coatings and packaging coatings businesses. His international experience with PPG includes expatriate assignments in Spain and Mexico as well as projects throughout the Asia/Pacific region.

Pheeraphon Prasertphol has been appointed optical monomers and coatings account manager, Southeast Asia. He has sales responsibility for PPG products in Thailand, Indonesia, Vietnam and India. Prasertphol previously worked for German Standard Co., in Bangkok, Siam Lens Manufacturing and Great Lakes Chemical Corp. in Thailand.

Robin Snyder has been named marketing manager, optical monomers. Snyder assumes the new role in addition to her existing responsibilities with PPG's fiber glass business for roofing products. In her new position,

Snyder is devising and implementing product growth strategy and marketing communications for Trivex lens material. She worked for 10 years with Merrill Lynch before joining PPG.