Polysar Limited

Erhardt Fischer

Douglas C Edwards

Michael Hugh Richmond

Klaas Tebbens

Jhy-Dou R Lo

A process is provided for preparing a vulcanized carbon black-reinforced chloro- or bromobutyl rubber film comprising admixing a polyfunctional amine vulcanization system with a carbon black-reinforced chloro- or bromobutyl rubber latex containing one or more selected emulsifiers, forming a film from the resulting mixture, drying said film and heating the dried film to provide the vulcanized film. The process may be used in the manufacture of coatings, dipped goods and chemical resistant impermeable treated fabrics.

Process for making vulcanized carbon black-reinforced bromobutyl rubber

A process is provided for producing a silica-synthetic polymer mixture by mixing silica, water and an alkyl trimethylammonium halide, adding this mixture to a latex of the synthetic polymer, coagulating the mixture and recovering the silica-polymer mixture. Such mixtures may be used for the production of rubbery vulcanizates such as shoe soles, light colored shaped articles and the like.

Silica-polymer mixtures

A process is described for the production of particulate rubber wherein a synthetic rubber in latex form is coagulated to yield small particles and the particles are then coated with a rubbery-resinous or resinous polymer, the mixing conditions for each of the coagulation and coating being within certain limits of Reynolds Number and residence time. Such particulate rubber may be used for the manufacture of articles such as tire components or hoses and gaskets.

Particulate rubber process

Conjugated diolefin-vinyl nitrile compound rubbers are produced in powder form by treatment of the coagulated rubber with a conjugated diolefin-vinyl nitrile compound vinyl aromatic hydrocarbon polymer. Such powdered rubbers may be used wherever conjugated diolefin-vinyl nitrile compound rubbers are used.

Powdered rubber

Synthetic rubber-black-plasticizer masterbatches are prepared in a particulate form, in contrast with their normal massed form, by a process which involves halogenating the rubber-black masterbatch after coagulation, but before addition of the plasticizer.

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Sarnia, Canada

Erhardt Fischer