The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 2015
Filed:
Nov. 09, 2007
Robert Q. Kluttz, Houston, TX (US);
Keith E. Stephens, Houston, TX (US);
Willem C. Vonk, Amsterdam, NL;
Jan Korenstra, Amsterdam, NL;
Robert Q. Kluttz, Houston, TX (US);
Keith E. Stephens, Houston, TX (US);
Willem C. Vonk, Amsterdam, NL;
Jan Korenstra, Amsterdam, NL;
Kraton Polymers U.S. LLC, Houston, TX (US);
Abstract
The present invention is directed to bituminous emulsions comprising bitumen, water, one or more emulsifiers systems and a diblock copolymer including one block of a monovinylaromatic hydrocarbon and one block of a conjugated diene, wherein the conjugated diene has a peak molecular weight from 30,000 to 78,000 and a vinyl content from 35 to 80 mol percent based on the number of repeat monomer units in the conjugated diene block. A block copolymer comprising at least two blocks of monovinylaromatic hydrocarbon and at least one block of conjugated diene, the block copolymer selected from linear triblock copolymers having a peak molecular weight that is 1.5 to 3.0 times the peak molecular weight of the diblock copolymer, multiarm coupled block copolymers having a peak molecular weight that is 1.5 to 9.0 times the peak molecular weight of the diblock copolymer, and mixtures thereof, wherein each block copolymer has a vinyl content from 35 to 80 mol percent based on the number of repeat monomer units in the conjugated diene block, wherein the ratio of (i) to (ii) in the block copolymer composition is greater than 1:1.