Polymer modified asphalt roofing material
A shingle coating asphalt composition is provided that is produced from a paving grade asphalt. The asphalt composition comprises a paving-grade asphalt that has been modified with one or more polymer additives; and a secondary additive comprising one or more of a viscosity reducing agent, a wax, a salt of a fatty acid ester, and an amide of a fatty acid. The shingle coating asphalt coating composition is used to make a shingle. The shingle includes a substrate, the asphalt, and roofing granules.
1. A roofing shingle comprising:
a substrate;
a polymer and wax modified asphalt coating on the substrate;
wherein the polymer and wax modified asphalt coating comprises a mixture of:
40-80 wt. % of a filler based on the total weight of the polymer-modified asphalt composition;
asphalt;
a polymer additive; and
wax,
wherein the non-filler portion of the polymer and wax modified asphalt coating comprises 85-99 wt. % asphalt, 1-13 wt. % polymer additive, and 1-6 wt. % wax;
a strip of nail zone reinforcement material adhered directly to the polymer and wax modified asphalt coating; and
roofing granules on the polymer and wax modified asphalt coating;
wherein the polymer and wax modified asphalt coating has a softening point in the range of 88° C. to 160° C. and a penetration at 25° C. of at least 15 dmm; and
wherein a transverse adhesion strength of the strip of nail zone reinforcing material to the polymer and wax modified asphalt coating is greater than a transverse adhesion of an otherwise identical shingle having the same nail zone reinforcement material and a conventional oxidized asphalt without wax and without polymer additive.
2. The roofing shingle of claim 1 , wherein the transverse adhesion of the strip of nail zone reinforcing material to the polymer and wax modified asphalt coating is more than 5% greater than the transverse adhesion of the otherwise identical shingle.
3. The roofing shingle of claim 1 , wherein the strip of nail zone reinforcement material is a woven polyester fabric.
4. The roofing shingle of claim 1 , wherein the polymer additive is styrene-butadiene rubber.
5. The roofing shingle of claim 1 , wherein the polymer additive is styrene-butadiene rubber.
6. The roofing shingle of claim 1 , wherein the wax is a Fischer-Tropsch wax.
7. The roofing shingle of claim 5 , wherein the wax is a Fischer-Tropsch wax.
8. The roofing shingle of claim 1 , wherein the transverse adhesion of the strip of nail zone reinforcing material to the polymer and wax modified asphalt coating is more than 5% greater than the transverse adhesion of the otherwise identical shingle.
9. A roofing shingle comprising:
a substrate;
a polymer and wax modified asphalt coating on the substrate;
wherein the polymer and wax modified asphalt coating comprises a mixture of:
40-80 wt. % of a filler based on the total weight of the polymer-modified asphalt composition;
asphalt;
a polymer additive; and
wax, wherein the non-filler portion of the polymer and wax modified asphalt coating comprises 85-99 wt. % asphalt, 1-13 wt. % polymer additive, and 1-6 wt. % wax;
a strip of nail zone reinforcement material adhered directly to the polymer and wax modified asphalt coating; and
roofing granules on the polymer and wax modified asphalt coating;
wherein the polymer and wax modified asphalt coating has a softening point in the range of 88° C. to 160° C. and a penetration at 25° C. of at least 15 dmm; and
wherein a transverse adhesion strength of the strip of nail zone reinforcing material to the polymer and wax modified asphalt coating is greater than 5 lbf.
10. The roofing shingle of claim 9 , wherein the strip of nail zone reinforcement material is a woven polyester fabric.
11. The roofing shingle of claim 9 , wherein the polymer additive is styrene-butadiene rubber.
12. The roofing shingle of claim 1 , wherein the polymer additive is a radial styrene-butadiene copolymer .
13. The roofing shingle of claim 9 , wherein the wax is a Fischer-Tropsch wax.
14. The roofing shingle of claim 11 , wherein the wax is a Fischer-Tropsch wax.
15. The roofing shingle of claim 9 , wherein the transverse adhesion of the strip of nail zone reinforcing material to the polymer and wax modified asphalt coating is more than 5% greater than the transverse adhesion of an otherwise identical shingle.
16. The roofing shingle of claim 1 , wherein the transverse adhesion of the strip of nail zone reinforcing material to the polymer and wax modified asphalt coating is more than 5% greater than the transverse adhesion of an otherwise identical shingle.
17. The roofing shingle of claim 1 , wherein the penetration at 25° C. is in the range of 16 dmm to 22 dmm.
18. The roofing shingle of claim 9 , wherein the penetration at 25° C. is in the range of 16 dmm to 22 dmm.