Waterproofing membrane applicable by heating with air-blown bitumen
OwnerMarco Daneseinventor
Life of this patent
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Abstract
Composition of waterproofing membrane suitable for being applied by means of hot bitumen both on a new covering and on a previous waterproofing layer based on blown bitumen, which is characterized in that it comprises 50 to 80% by weight of distilled bitumen, 8 to 20% by weight of amorphous ethylene-propylene and/or ethylene-propylene-butene 1 copolymer, and 5 to 15% by weight of amorphous polypropylene homopolymer, and optionally up to 40% by weight of a filler and/or up to 1% by weight of an antioxidant.
Claims6
Method of waterproofing covering structures comprising the step of applying by means of hot air-blown bitumen on a new covering structure or on a previous waterproofing layer based on air-blown bitumen, a composition comprising 50 to 80% by weight of distilled bitumen, 8 to 20% by weight of an amorphous copolymer selected from ethylene-propylene copolymer and ethylene-propylene-butene-1 copolymer and mixtures thereof, and 1 to 20% by weight of amorphous polypropylene homopolymer, said amorphous polypropylene homopolymer having a viscosity between 1000 and 50000 mPa.times.s and a crystallinity less than or equal to 20 J/g.
Dependencies are inferred from the claim text.