Forschungszentrum Julich Gmbh

Forschungszentrum J&uuml;lich Gmbh

Dieter Richter

Thomas Sottmann

Lutz Willner

Britta Jakobs

J&uuml;rgen Allgaier

Jürgen Allgaier

Henrich Frielinghaus

Christian Frank

Thomas Sottman

Reinhard Strey

The invention relates to a method for increasing the efficiency of surfactants as well as to a method for suppressing lamellar mesophases in microemulsions. According to the invention, block copolymers having a water-soluble block A and a water-insoluble part B are admixed to the surfactants. The use of these substances as additives can considerably increase the efficiency of the surfactants. Moreover, the addition of the block copolymers suppresses the formation of undesired lamellar mesophases in microemulsions.

Method for increasing the efficiency of surfactants with simultaneous suppression of lamellar mesophases and surfactants with an additive added thereto

The invention relates to a method for increasing the efficiency of surfactants and to a method for suppressing lamellar mesophases in microemulsions. Additive block co-polymers with a water-soluble block A and a water-insoluble part B are added to the surfactants. The efficiency of surfactants can be in-creased to a substantial extent by using said compounds as additives. The formation of undesirable lamellar mesophases in microemulsions is suppressed by adding said block co-polymers.

The invention relates to a process for the preparation of hydrophobic-hydrophilic AB block copolymers wherein block A consists of the monomer unit a, which is conjugated diene, and block B consists of the monomer unit b, which is epoxide, and the invention also relates to the AB block copolymer synthesized by the preparation process, as well as to micellar systems made from the AB block copolymer. According to the invention, the AB block copolymer is synthesized in two steps, whereby the first step is the preparation of block A in a nonpolar solvent and the second step is the preparation of block B in a polar solvent.

Process for the preparation of hydrophobic/hydrophile AB block copolymers

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Jülich, Germany

Dieter Richter