A composite material is provided comprising an elastomer, from about 0.1 wt % to about 15 wt. % of a layered mineral based on the weight of the total composition and from about 0.1 wt. % to about 15 wt. % of asphalt based on the weight of the total composition.
Description
Claims
1. A composite, comprising:
an elastomer having a Tg of less than 25.degree. C.;
a layered mineral in an amount ranging from about 0.5 to about 15 wt % based on the total weight of the composite capable of forming an intercalation compound; and
an asphalt in an amount ranging from about 0.1 wt % to about 15 wt % based on the total weight of the composite, wherein the asphalt has a penetration number as determined by ASTM Method D-5 at 25.degree. C. of from about 20 to about 300.
2. The composite of claim 1, wherein the elastomer has a number average molecular weight in the range of about 30,000 to 600,000 gms./mol.
3. The composite of claim 2, wherein the asphalt is sulfonated and neutralized.
4. The composite of claim 1 wherein the layered mineral is selected from the group consisting of smectitic clay, montmorillonite, saporite, beidellite, montronite, hectorite, stensite, vermiculite, and hallosite.
5. The composite of claim 3 wherein the elastomer is a styrene-butadiene copolymer having a styrene content in the range of about 10 wt. % to about 50 wt. %.
6. The composite of claim 4, wherein the asphalt is sulfonated and neutralized.
7. A composite comprising:
an elastomer having a Tg of less than 25.degree. C.;
a layered mineral in amount ranging from about 0.5 wt % to about 15 wt % based on the total weight of the composite, the layered mineral having been modified with a hydrocarbyl onium ion swelling agent to form an intercalation compound; and
from about 0.1 wt % to about 15 wt % based on the total weight of the composition of an asphalt or sulfonated asphalt wherein the asphalt has a penetration number as determined by ASTM Method D-5 at 25.degree. C. of from about 20 to about 300.
Patent Grant
5652284
