Patent ID: 6579921
Filing Date: 2003-06-17
Classification: C08L,D06N,E04D,Y10T

Abstract:
A roofing membrane having cold flexibility below about âˆ’20Â° C. and high flow resistance above about 110Â° C., comprising a matrix-filled fibrous substrate and a filled elastomer-modified bituminous composition comprising about 10 to about 30 wt % of said composition of a mineral filler and a bituminous composition comprising bitumen and about 8 to 13 wt % of said bitumen of an elastomer having a conjugated diene structure cross-linked to an extent to permit a reduction of about 10 to 20 wt % in the amount of elastomer in the bituminous composition for the same low and high temperature properties or a concomitant improvement in low and high temperature properties at the same amount of elastomer.