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. 06, 1984
Filed:
Jan. 31, 1983
Applicant:
Inventor:
Donald G Timms, Hilly Ground, GB;
Assignee:
Enichem Elastomers Limited, Southhampton, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09F / ; C09F / ;
U.S. Cl.
CPC ...
2604056 ; 260407 ; 260 97 ; 260 975 ; 585531 ;
Abstract
Unsaturated acids in rosin or tall oil are disproportionated by heating the rosin or tall oil with a catalyst comprising iodine and an iron compound using ammonia, an ammonium salt or an amine as an additional component of the catalyst. Use of this additional component gives a remarkable and unexpected increase in reaction rate and enables the preparation of a disproportionated rosin containing 0.5% or less residual abietic acid, as measured by ultraviolet spectroscopy.