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:
May. 08, 2007
Filed:
Aug. 27, 2004
James Barnat, Wichita, KS (US);
James Barnat, Wichita, KS (US);
SemMaterials, L.P., Tulsa, OK (US);
Abstract
A method of selecting a bituminous emulsion with enhanced performance for paving is provided. This method includes selecting polymer modified bitumen with a penetration value of about 25 to 450 dmm at 25° C. and selecting one or more emulsifiers comprised of at least about 5% by mass of a cationic nitrogenous compound selected from compounds having a carbonyl carbon atom bonded to a nitrogen atom, compounds having a carbon atom double bonded to a nitrogen atom, or combinations thereof based on the total mass of the selected emulsifier. Each selected emulsifier is reacted with a carboxylic acid to create one or more carboxylate salts. Each carboxylate salt created from a different proposed emulsifier separately is mixed with the bitumen to form one or more proposed bituminous emulsions. The coalescence of each proposed bituminous emulsion is measured using a rheology test, and a bituminous emulsion of the composition described above is chosen for paving a surface based on its coalescence properties.