Patents Represented by Attorney C. W. Vanecek

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  • Rigid foam with improved "k" factor by reacting a polyisocyanate prepolymer and polyester polyol containing low free glycol
    Patent number: 5064873
    Abstract: Rigid cellular polymers are made by reacting an isocyanate-terminated quasi-prepolymer with a polyol component comprising a polyester polyol having a free glycol content of less than about 7 percent by weight of the polyester polyol in the presence of a blowing agent. The combined use of the quasi-prepolymer and the polyester polyol enhances the thermal insulating properties of the foams.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: November 12, 1991
    Assignee: Jim Walter Research Corp.
    Inventors: Scott C. Snider, Michael E. Londrigan, Kenneth G. Trout
  • Hydroxyaryl-tetramethyl-piperidines
    Patent number: 4038280
    Abstract: New 4-(4'-hydroxyaryl)-2,2,6,6-tetramethyl-piperidines are used as stabilisers for organic materials, especially for polymers.
    Type: Grant
    Filed: November 28, 1972
    Date of Patent: July 26, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Donald Richard Randell, Malcolm John Smith
  • Light protecting agents
    Patent number: 4038250
    Abstract: New substituted p-hydroxybenzoic acid phenyl esters are light protecting agents for polymers. They are prepared by acylation of a corrsponding phenol with an appropriate acid chloride.
    Type: Grant
    Filed: April 24, 1975
    Date of Patent: July 26, 1977
    Assignee: Ciba-Geigy Corporation
    Inventor: Hanns Lind