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. 30, 1995
Filed:
Mar. 24, 1994
Kenneth D Hope, Kingwood, TX (US);
Ting C Ho, Kingwood, TX (US);
Barrett L Cupples, Kingwood, TX (US);
Chevron Chemical Company, San Francisco, CA (US);
Abstract
An oligomer is made by contacting a straight-chain, .alpha.-olefinic monomer with boron trifluoride and a hydroxy carbonyl promoter. The hydroxy carbonyl is preferably a .beta.-hydroxy-ketone, such as 4-hydroxy-4-methyl-2-pentanone. A second promoter can be used in conjunction with the boron trifluoride and the hydroxy carbonyl promoter. Possible secondary promoters include aldehydes, alcohols, alcohol alkoxylates, carboxylic acids, ethers, ketones, and their mixtures. Preferably the oligomer product has a kinematic viscosity at 100.degree. C. of less than 1.7 cSt; has a dimer to trimer and higher oligomer ratio of at least 1:1; and is at least 90 wt. % dimer and trimer of the monomer.