Crack sealant method and composition for resistance to UV aging and weathering
An asphaltic sealant composition and method which use (a) the incorporation of one or more pigment and/or UV absorbing materials, (b) a low shear production method, and (c) the addition of an epoxidized ester of a vegetable oil or a plasticizer, effective for increasing the degree of dispersion of the pigment material in the sealant composition, to provide improve resistance to UV radiation.
1. An asphaltic sealant composition which is resistant to UV exposure, the asphaltic sealant composition comprising:
asphalt in an amount in a range of from 50% to 89% by weight based upon a total weight of the asphaltic sealant composition, the asphalt having a jet black color;
titanium dioxide dispersed in the asphalt in an amount in a range of from 10% to 30% by weight based upon the total weight of the asphaltic sealant composition, and at a degree of dispersion, which provides a modified ASTM C793-05 (Reapproved 2017) test result for the asphaltic sealant composition; and
one or more epoxidized esters of vegetable oils, present in the asphaltic sealing composition in a total amount, greater than or equal to 1% by weight based upon the total weight of the asphaltic sealant composition, which provides a degree of dispersion of the titanium dioxide in the asphaltic sealant composition to provide the modified ASTM C793-05 (Reapproved 2017) test result,
the modified ASTM C793-05 (Reapproved 2017) test result being that, after 500 hours of exposure of the asphaltic sealant composition in a fluorescent UV laboratory accelerated weathering device, the asphaltic sealant composition, when cooled to a temperature of 0° C., will not break into two or more pieces when bent 180° around a steel mandrel which is 12.7 Mm in diameter.
2. The asphaltic sealant composition of claim 1 comprising the titanium dioxide being dioxide.
3. The asphaltic sealant composition of claim 1 comprising the amount of the titanium dioxide being in a range of from 15% to 27% by weight based upon the total weight of the asphaltic sealant composition.
4. The asphaltic sealant composition of claim 1 comprising the one or more epoxidized esters of vegetable oils being an epoxidized ester of soybean oil.
5. The asphaltic sealant composition of claim 4 comprising the epoxidized ester of soybean oil being present in the asphaltic sealant composition in an amount in a range of from 1% to 5% by weight based upon the total weight of the asphaltic sealant composition.
6. The asphaltic sealant composition of claim 1 further comprising:
a radial SBS polymer and/or a linear SBS polymer in a total amount in a range of from 3% to 8% by weight based upon the total weight of the asphaltic sealant composition and/or
crumb rubber in an amount in a range of from 3% to 8% by weight based upon the total weight of the asphaltic sealant composition.
7. The asphaltic sealant composition of claim 6 comprising:
the one or more epoxidized esters of vegetable oils being an epoxidized ester of soybean oil;
the titanium dioxide being rutile titanium dioxide;
the rutile titanium dioxide being present in an amount of from 15% to 27% by weight based upon the total weight of the asphaltic sealant composition;
the epoxidized ester of soybean oil being present in an amount of from 2% to 5% by weight based upon the total weight of the asphaltic sealant composition;
the radial SBS polymer and/or the linear SBS polymer being present in a total amount of from 3% to 8% by weight based upon the total weight of the asphaltic sealant composition; and
the crumb rubber being present in an amount of from 3% to 8% by weight based upon the total weight of the asphaltic sealant composition.
8. An asphaltic sealant composition which is resistant to UV exposure, the asphaltic sealant composition comprising:
asphalt in an amount in a range of from 50% to 89% by weight based upon a total weight of the asphaltic sealant composition, the asphalt having a jet black color;
iron (III) oxide dispersed in the asphalt in an amount in a range of from 10% to 30% by weight based upon the total weight of the asphaltic sealant composition, and at a degree of dispersion, which provides a modified ASTM C793-05 (Reapproved 2017) test result for the asphaltic sealant composition; and
one or more epoxidized esters of vegetable oils present in the asphaltic sealing composition in a total amount, greater than or equal to 1% by weight based upon the total weight of the asphaltic sealant composition, which provides a degree of dispersion of the iron (III) oxide in the asphaltic sealant composition to provide the modified ASTM C793-05 (Reapproved 2017) test result,
the modified ASTM C793-05 (Reapproved 2017) test result being that, after 500 hours of exposure of the asphaltic sealant composition in a fluorescent UV laboratory accelerated weathering device, the asphaltic sealant composition, when cooled to a temperature of 0° C., will not break into two or more pieces when bent 1800 around a steel mandrel which is 12.7 mm in diameter.
9. The asphaltic sealant composition of claim 8 comprising the one or more epoxidized esters of vegetable oils being an epoxidized ester of soybean oil.
10. The asphaltic sealant composition of claim 9 comprising the epoxidized ester of soybean oil being present in the asphaltic sealant composition in an amount in a range of from 1% to 5% by weight based upon the total weight of the asphaltic sealant composition.
11. The asphaltic sealant composition of claim 8 further comprising:
a radial SBS polymer and/or a linear SBS polymer in a total amount in a range of from 3% to 8% by weight based upon the total weight of the asphaltic sealant composition and/or
crumb rubber in an amount in a range of from 3% to 8% by weight based upon the total weight of the asphaltic sealant composition.
12. The asphaltic sealant composition of claim 11 comprising:
the one or more epoxidized esters of vegetable oils being an epoxidized ester of soybean oil;
the epoxidized ester of soybean oil being present in an amount of from 2% to 5% by weight based upon the total weight of the asphaltic sealant composition;
the radial SBS polymer and/or the linear SBS polymer being present in a total amount of from 3% to 8% by weight based upon the total weight of the asphaltic sealant composition; and
the crumb rubber being present in an amount of from 3% to 8% by weight based upon the total weight of the asphaltic sealant composition.