Compositions comprising asphalt and electrically neutral copolymer dispersions

Patent metadata

Field	Value
Publication number	US-9469786-B2
Application number	US-201214376315-A
Country	US
Kind code	B2
Filing date	Feb 3, 2012
Priority date	Feb 3, 2012
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A composition for use in a pavement surface, comprises (a) asphalt in an amount of from 40 to 70 parts by weight; (b) an electrically neutral copolymer in an amount of from greater than 0 to 10 parts by weight; (c) an emulsifier in an amount of from 0.1 to 4 parts by weight; (d) an acid or a base in an amount of from 0.1 to 4 parts by weight; and (e) water in an amount of from 25 to 60 parts by weight. A method of making a composition, a method of applying a composition, and a paved surface is also disclosed.

First claim

The invention claimed is:

1. A paved surface, comprising:
(a) a first layer comprising asphalt;
(b) a tie layer provided on the first layer, comprising asphalt in an amount of from 82.9% to 94.7% by weight, an electrically neutral copolymer in an amount of from 2.9% to 9.2% by weight, an emulsifier in an amount of from 1.0% to 4.7% by weight, and an acid or base in an amount of from 1.0% to 4.7% by weight; and
(c) a second layer comprising asphalt provided on the tie layer.

2. The paved surface as claimed in claim 1 , wherein the electrically neutral copolymer includes a styrene acrylic copolymer or a pure acrylic copolymer derived from monomers including one or more (meth)acrylates and optionally styrene.

3. The paved surface as claimed in claim 1 , wherein the emulsifier includes a cationic emulsifier and the acid or base comprises an acid.

4. The paved surface as claimed in claim 1 , wherein the emulsifier includes an anionic emulsifier and the acid or base comprises a base.

5. The paved surface as claimed in claim 1 , wherein the tie layer further comprises up to 12.2% by weight of one or more aromatic recycling agents or non-asphaltic rosin materials.

6. The paved surface as claimed in claim 1 , wherein the asphalt in the tie layer has a pen value of greater than 40 dmm.

7. The paved surface as claimed in claim 1 , wherein the tie layer further comprises aggregate.

8. A method of producing a paved surface, comprising:
producing an aqueous composition comprising water and a tie layer composition, the tie layer composition comprising:
(a) asphalt in an amount of from 82.9% to 94.7% by weight,
(b) an electrically neutral copolymer in an amount of from 2.9% to 9.2% by weight,
(c) an emulsifier in an amount of from 1.0% to 4.7% by weight, and
(d) an acid or base in an amount of from 1.0% to 4.7% by weight;

applying the aqueous composition to an existing paved layer as a tie layer; and
applying a new layer comprising asphalt to the tie layer.

9. The method as claimed in claim 8 , wherein the electrically neutral copolymer is pre-mixed with an anionic emulsifier or a cationic emulsifier to produce a charged latex copolymer prior to mixing the asphalt and the acid or base with the emulsifier and the electrically neutral copolymer.

10. The method as claimed in claim 8 , wherein aggregate is blended with the aqueous composition prior to applying the aqueous composition to the existing paved layer.

11. The method as claimed in claim 8 , wherein the electrically neutral copolymer includes a styrene acrylic copolymer or a pure acrylic copolymer derived from monomers including one or more (meth)acrylates and optionally styrene.

12. The method as claimed in claim 8 , wherein the emulsifier includes a cationic emulsifier and the acid or base comprises an acid.

13. The method as claimed in claim 8 , wherein the emulsifier includes an anionic emulsifier and the acid or base comprises a base.

14. The method as claimed in claim 8 , wherein the aqueous composition further comprises up to 12.2% by weight of one or more aromatic recycling agents or non-asphaltic rosin materials.

15. The method as claimed in claim 8 , wherein the asphalt in the aqueous composition has a pen value of greater than 40 dmm.

Assignees

• Kadrmas Arlis
• Burghart Armin
• Basf Se

Inventors

• Kadrmas Arlis
• Burghart Armin

Classifications

• C08L95/005

  Aqueous compositions, e.g. emulsions · CPC title

• E01C3/00

  Foundations for pavings (specially adapted for playgrounds or sports grounds E01C13/02; foundations in general E02D) · CPC title

• E01C7/185

  Isolating, separating or connecting intermediate layers, e.g. adhesive layers; Transmission of shearing force in horizontal intermediate planes, e.g. by protrusions (E01C7/187 takes precedence; adhesive layers for materials E01C7/35) · CPC title

• C09D195/005 Primary

  Aqueous compositions, e.g. emulsions · CPC title

• C08L2555/80

  Macromolecular constituents · CPC title