A group of manufacturers, distributors and suppliers of a chemical used in the tire-making process has asked a judge to dismiss a lawsuit that claims the chemical caused some former Uniroyal Goodrich Tire Co. workers to get cancer.

The 16 defendants in the lawsuit, including Exxon Mobil Corp., Sun Petroleum Products Co., Texaco, Standard Oil Co., Shell Canada and Shell Chemical, submitted documents to Eau Claire (Wis.) County Circuit Judge Lisa Stark this week contending they did nothing wrong.