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. 07, 1991
Filed:
Dec. 22, 1988
Terence Colclough, Abingdon, GB;
Exxon Chemical Patents, Inc., Linden, NJ (US);
Abstract
Metal dithiophosphates obtainable by reacting a basic zinc or copper compound or a molybdenum compound with a dithiophosphoric acid, said dithiophosphoric acid being obtainable by reacting phosphorus pentasulphide with a mixture of alcohols ROH and R.sup.1 (OH).sub.m where m is 1 or 2, the group R is an aliphatic hydrogen- and carbon-containing group having at least 4 carbon atoms, e.g. a C.sub.4 to C.sub.10 alkyl group, or is an alkaryl group, R.sup.1 is a hydrogen- and carbon-containing group containing at least 12 carbon atoms and either (a) a ##STR1## group or (b) the group--(C.sub.n H.sub.2n-p R.sub.p.sup.2 O).sub.q --, R.sup.2 being an alkyl group, n begin an integer of from 2 to 5, p being zero or an integer of from 1 to 5 and q being an integer of 2 or more or R.sup.1 (OH.sub.m is a glyceryl derivative having the formula ##STR2## where R.sup.3 is an aliphatic hydrogen- and carbon-containing group containing at least 9 carbon atoms and R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are hydrogen or alkyl groups. Preferred is the zinc dithiophosphate derived from 2-ethyl hexanol (ROH) and ##STR3##