Method of forming waterproofing material

Details Method of forming waterproofing material Method of forming waterproofing material

1979-01-22

1980-07-29

Lawrence, Evan K.

Coating processes

With winding, balling, rolling, or coiling

118 69, 427322, 4273982, 4273983, 4273985, B05D 304, B05D 312

Patent

active

042151600

ABSTRACT:
A method of preparing a preformed sheet-like waterproofing material in the form of a laminate structure of a sheet-like flexible support member having on one side thereof a flexible membrane of an adhesive bituminous composition. The method requires placing the flexible sheet-like polymeric support member in facing relationship with a forming surface, applying a coating of an adhesive bituminous composition having a temperature above the melting point of the polymeric support member to the opposite surface of the support and simultaneously cooling the forming surface at a rate at least sufficient to maintain the support member thereon below its melting point for a time at least sufficient to permit the bituminous composition to cool below the melting point of the support member. The present method alleviates the utilization of a non-structural release sheet during formation or packaging of the waterproofing composite structure.

REFERENCES:
patent: 2330202 (1943-09-01), Brennan
patent: 2347643 (1944-05-01), Schieman
patent: 3741856 (1973-06-01), Hurst

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