Epdm-based roofing shingle compositions

Details Epdm-based roofing shingle compositions Epdm-based roofing shingle compositions

C - Chemistry, Metallurgy

08

L

C08L 23/16 (2006.01) C08L 23/08 (2006.01) C08L 23/10 (2006.01) E04D 1/20 (2006.01) E04D 5/06 (2006.01) C08L 17/00 (2006.01) C08L 91/00 (2006.01)

Patent

CA 2254133

A roof covering element for sloped roofs, e.g., a roofing shingle, comprising 100 parts by weight of at (east one ethylene-propylene-diene terpolymer, from about 50 to 600 parts by weight of a filler selected from the groups consisting of reinforcing and non-reinforcing materials and mixtures thereof per 100 parts of an EPDM terpolymer, and from 0 to about 120 parts by weight of at least one impact modifying polymer, per 100 parts by weight ethylene-propylene-diene terpolymer, the covering element having an unaged Shore "A" hardness at about 23°C of at least 70, and more preferably, a limiting oxygen index (LOI) of at least 30 percent oxygen when tested in accordance with ASTM D2863-91. The use of fire retardant additives is also desirable.

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