Bp Chemicals Limited

Sanford Gmbh

Philip W Ambler

Philip K Hodgson

Nevin John Stewart

Vincent Kwan

The disclosure is generally related to a multi-color writing ink and, more particularly, to a multi-color writing instrument comprising a mixture of a first ink composition and a second ink composition, wherein the first and second ink compositions are immiscible with each other.

Multi-color writing inks

This invention relates to a process for the polymerization of an olefinic feedstock comprising one or more of butene-1, butene-2 and iso-butene by bringing the feedstock into contact with an ionic liquid comprising a) an aluminium compound of the formula R.sub.n AlX.sub.3-n wherein R is a C1-C6 alkyl radical, X is a halogen atom and n is 0, 1 or 2, and b) a substituted imidazolium and/or a substituted pyridinium halide such that the melting point of the ionic liquid is below the reaction temperature in the range from -50.degree. C. to +100.degree. C. The polymers so produced can be used to react with alkenyl succinimides which are useful fuel and lubricating oil additives.

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Bracknell, United Kingdom

Philip W Ambler