Basf Se Corporation

National University of Singapore

Xiao Fu

Stefan Frenzel

Edward Bohres

Marc Rudolf Jung

Anna Maria Mueller-Cristadoro

Szilard Csihony

Radoslaw Kierat

Natalia Widjojo

Felix Alexander Westerhaus

Matthias Fies

Kuo Wei Huang

Ting Ma

Claudia Staudt

Tina Noack

Choon Hong Tan

Kuo-Wei Huang

Lee May Loo

The invention relates to a method for the preparation of a hyperbranched polyester mixture obtainable by reacting a hydroxyl group containing carboxylic acid (B) with at least one carboxylic acid group and at least two hydroxyl groups with a diol (C) having a molecular weight of more than 100 g/mol, optionally in the presence of at least one further reactant, wherein the at least one further reactant is a polyol (A) having at least three hydroxyl groups under a reaction condition allowing ester and ether formation; and reacting the mixture resulting from step (a) with a hydrophobic carboxylic acid (D) resulting in the hyperbranched polyester mixture. The invention further relates to said hyperbranched polyester mixture and the use as wax inhibitor, as pour point depressant, as lubricant or in lubricating oils.

Hyperbranched polyesters and their use as wax inhibitor, as pour point depressant, as lubricant or in lubricating oils

Use of hydrophobically modified polyalkanolamines obtainable by condensing at least one trialkanolamine and optionally further condensable monomers and reacting at least one of the terminal OH groups with suitable reactants capable of reacting with OH groups and comprising long chain hydrocarbon groups as wax inhibitor, pour point depressant and additive for lubricants.

Use of hydrophobically modified polyalkanolamines as wax inhibitors, pour point depressant and additive for lubricants

Compounds of formula (I): wherein Rto R, and Xare defined herein. Also disclosed are methods of making and using these compounds. 

Phase transfer catalysts

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Singapore, Singapore

Xiao Fu