Roger D. Wollenberg

TPC Group, Inc. engages in production of value-added products derived from niche petrochemical raw materials such as C4 hydrocarbons. It sells products into a specialty and intermediate markets, including synthetic rubber, fuels, lubricant additives, plastics and surfactants. Its products include butadiene, butane-1, fuel products, polyisobutylene, isobutylene derivative, propylene tetramer and pentamer. The company was founded in 1943 and is headquartered in Houston, TX.

TPC Group LLC manufactures chemicals required for the production of synthetic rubber, nylon, adhesives, catalysts and additives. The firm engages in the production and sale of petrochemicals. It sells its products to chemical and petroleum based companies. The company was founded in 1940 and is headquartered in Houston, TX.

Hexion, Inc. engages in the manufacture of thermoset resins. Its products are used in several applications including abrasives, adhesives, chemical intermediates, civil engineering, coatings, composites, crop protection, electrical/electronics, engineered wood, fertilizers and pesticides, fibers and textiles, foams, friction materials, furniture, molding compounds, oilfield, oriented strand board, particleboard and fiberboard, plywood, and laminated veneer lumber, and refractories. The company was founded in 1899 and is headquartered in Columbus, OH.

Hexion Specialty Chemicals, Inc. used to produce binding, bonding resins and adhesives. It used to produce building-block chemical formaldehyde for various wood and industrial markets through its network of 50 manufacturing facilities in nine countries. The company was headquartered in Columbus, OH.