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:
Nov. 16, 1999
Filed:
Jul. 20, 1993
Applicant:
Inventors:
Jeffrey George Southwick, Houston, TX (US);
David Michael Austgen, Jr, Missouri City, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
524505 ;
Abstract
This invention is a process for producing stable polymer emulsions and latexes. The polymers are block copolymers of conjugated dienes and vinyl aromatic hydrocarbons. The process comprises making a solution of the polymer, adding another block copolymer as a stabilizing agent, emulsifying the polymer solution by mixing it with an aqueous phase and removing the solvent, cosolvent and excess water. The stabilizing block polymer contains an acrylic block in addition to at least one vinyl aromatic hydrocarbon and/or a conjugated diene block.