Method of impregnating polystyrene beads with an expanding...

Details Method of impregnating polystyrene beads with an expanding... Method of impregnating polystyrene beads with an expanding...

C - Chemistry, Metallurgy

08

J

403/76, 403/80

C08J 9/18 (2006.01)

Patent

CA 1255450

METHOD OF IMPREGNATING POLYSTYRENE BEADS WITH AN EXPANDING AGENT Abstract of the Disclosure A method of impregnating polystyrene beads with an aliphatic hydrocarbon, rendering it into expandable polysty- rene. The method involves the use of an improved impregnating solution or bath. The solution includes water, an expanding agent, the polystyrene beads and soaps which act as anti- agglomeration agents. The beads are maintained in the solu- tion for a selected time period and at a temperature and pressure suitable to permit the expanding agent to impregnate the beads. The beads are then separated from the solution and, after drying, they are ready for use, no further process- ing being required.

491588

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