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:
Dec. 31, 1991
Filed:
Feb. 27, 1991
Applicant:
Inventors:
Gerald K McEwen, Ashland, VA (US);
Donald L Schmidt, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526278 ; 526347 ; 5263185 ; 5263285 ; 526345 ;
Abstract
Novel phosphonic acid-containing compounds such as (2-(4-ethylphenyl)ethenyl)-phosphonic acid and esters thereof are disclosed. A method preparation of the phosphonic acids comprising contacting a diethylenically unsaturated aromatic compound and phosphorus pentachloride in the present of sulfur dioxide is also disclosed. The compounds of this invention are useful as monomers for the preparation of polymers having enhanced anti-corrosive properties.