Patents Assigned to Vulnax International Limited
  • Ozone-stabilized rubbery elastomers
    Patent number: 4638026
    Abstract: Rubbery elastomers are stabilized against the deleterious effects of ozone by having homogeneously incorporated therein, antiozonant effective amounts of an organic lactam compound.
    Type: Grant
    Filed: October 19, 1984
    Date of Patent: January 20, 1987
    Assignee: Vulnax International Limited
    Inventors: Bernard Sambuis, Daniel Gavory
  • Vulcanization process and compositions for use therein
    Patent number: 4246375
    Abstract: The use of C.sub.10 to C.sub.14 alkanoic acids, especially lauric acid, as a processing aid in the vulcanization of polychloroprene rubbers by heating in the presence of magnesium oxide, zinc oxide and thiophosphoric-N,N',N"-trimethyltriamide. Also the manufacture of pre-formed mixtures of the acid and the amide in the ratio of 0.5:1 to 2:1 for use in this process.The use of these acids overcome the technical problem of blooming on storage which is obtained when the more usual stearic acid is used in the process.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: January 20, 1981
    Assignee: Vulnax International Limited
    Inventors: Peter Hill, Jack Thompson