Process of producing roofing shingle coating asphalt

Details Process of producing roofing shingle coating asphalt Process of producing roofing shingle coating asphalt

C - Chemistry, Metallurgy

08

L

C08L 95/00 (2006.01) C08L 91/06 (2006.01)

Patent

CA 2709841

A process of producing a roofing shingle coating asphalt from an asphalt feedstock includes the following steps. Wax and blowing catalyst are added to the asphalt feedstock. Then the asphalt feedstock is blown to produce the coating asphalt. The coating asphalt has a softening point within a range of from 190° (88°C) to 235°F (113°C) and has a penetration of at least 15 dmm at 77°F (25°C).

La présente invention concerne un procédé de production de bardeaux d'asphalte pour revêtement de toiture à partir d'un substrat d'asphalte, ledit procédé comprenant les étapes suivantes. De la cire et un catalyseur de soufflage sont ajoutés au substrat d'asphalte. Puis le substrat d'asphalte est soufflé pour obtenir l'asphalte pour revêtement. L'asphalte pour revêtement présente un point de fusion se situant dans un intervalle de 88 à 113 °C et une pénétration d'au moins 15 dmm à 25 °C.

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