D - Textiles – Paper – 06 – M
Patent
D - Textiles, Paper
06
M
154/122, 400/161
D06M 15/17 (2006.01) B32B 11/02 (2006.01)
Patent
CA 1183986
A B S T R A C T This invention relates to a novel bitumen mixture and a high performance prefabricated waterproofing membrane useful for roofing which is obtained by impregnating differ- ent layers of reinforcing material with the bitumen mixture. More particularly, the invention relates to a novel bitumen mixture and a waterproofing membrane comprising a series of reinforcing layers including a polyester mat, a mat of fiberglass and a fiberglass net. Each reinforcing layer is impregnated with bitumen mixed with a thermoplastic polymer wherein the polymer is selected from the group consisting of an amorphous copolymer of ethylene/propylene, atactic polypropylene, polyisobutylene and styrene-butadiene-styrene block copolymer. The mixture has a ring and ball softening point of at least 105°C and preferably about 155°C.
404378
Corporation Owens-Corning Fiberglas
G. Ronald Bell & Associates
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