Solutia Austria Gmbh

Manfred Krassnitzer

Maximilian Friedl

Willibald Paar

Johann Gmoser

Roland Feola

Martin Gerlitz

Thomas Fischer

Ernst Supper

Binders for aqueous corrosion protection systems, comprising products A&prime;ABC of reaction of epoxy resins, fatty acids, and amines, having a number average molar mass M of at least 5000 g/mol, obtained by reacting epoxide compounds A&prime; containing at least two epoxide groups per molecule and reaction products ABC of epoxide compounds A, fatty acids B, and amines C, wherein, where appropriate, the epoxide compounds A&prime; and/or the epoxide compounds A have been modified prior to further reaction, in whole or in part, by reaction with compounds D containing at least one acid group or hydroxyl group reactive toward epoxide groups, and wherein, where appropriate, the amines C have been modified prior to further reaction, in whole or in part, by reaction with aliphatic or aromatic monoepoxide compounds A&Prime; or mixtures thereof.

Product A'ABC of epoxy resins A' and product of polyepoxides A, fatty acids B and amines C

Water-dilutable polyvinylbutyral dispersions obtainable by a two-stage reaction in the first stage of which at least one tertiary alkanolamine A and at least one diisocyanate B are reacted to the theoretically calculated NCO content and the amounts of components A and B are chosen such that the amount of substance of the diisocyanates B is from 0.8 to 1.3 times the amount of substance of the reactive hydroxyl groups in A and thereafter in the second stage a polyvinylbutyral C dissolved in a solvent which is inert towards isocyanates is reacted with the adduct AB from the first step to form the product ABC until all of the isocyanate groups have undergone complete reaction, the number of hydroxyl groups in C being at least ten times the number of isocyanate groups in the reaction product AB.

Aqueous anticorrosion primers based on polyvinylbutyral

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Graz, Austria

Manfred Krassnitzer