Degussa Aktiengesellschaft

Agomer Gesellschaft MIT Beschrankter Haftung

Mathias Hopp

Dietrich Arntz

Marcus Morawietz

Thomas Hasskerl

Helmut Schwind

Klaus Dorn

Dirk Hauch

A process for producing polyhydroxy ethers having the formula (I) (HO).sub.(w--M) W(OV).sub.m, in which W represents an organic group and OV a structural element containing hydroxyl groups, having the formula (III) ##STR1## A multifunctional alcohol W(OH).sub.w (II) is reacted with an .alpha.,.beta.-unsaturated carbonyl compound XCH.dbd.CY--CZ.dbd.O (IV) and formaldehyde in the presence of a base. The .alpha., .beta.-unsaturated carbonyl compound (IV) and the remaining quantities of formaldehyde, multifunctional alcohol (II) and base are added continuously or periodically to an aqueous solution or suspension containing at least 10 mole % of the multifunctional alcohol (II), at least 10 to 70 mole % of the formaldehyde and at least 10 mole % of the base. Preferred multifunctional alcohols (II) are pentaerythritol, TMP and TME. Preferred carbonyl compounds (IV) are acrolein and .alpha.-alkylacrolein. New asymmetric polyhydroxy ethers are also disclosed.

Process for producing polyhydroxy ethers and unsymmetrical polyhydroxy

The invention relates to copolymers for producing cast glass or thermally dimensionally stable formed materials.

Copolymers useful for producing cast glass and thermally dimensionally

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Biebergemund, Germany

Mathias Hopp