Patents Assigned to Phillips Petroleum Co., Inc.
  • Patent number: 4126662
    Abstract: An injection molded polymer having limited surface gloss is provided by preparing an admixture of an injection moldable polymer substrate and an additive chosen from among the group consisting of finely divided textile fibers, finely divided hydrocarbon polymers, and blowing agents and injection molding an article from the admixture. In the embodiment of the invention employing blowing agents the admixing is carried out at a temperature below that at which the blowing agent is activated and the injection molding is carried out at a temperature sufficient to activate the decomposition of the blowing agent.
    Type: Grant
    Filed: October 9, 1975
    Date of Patent: November 21, 1978
    Assignee: Phillips Petroleum Co., Inc.
    Inventor: Terence C. Middlebrook