Th. Goldschmidt Ag

Dietmar Schedlitzki

Jurgen Fock

Ulrich Holtschmidt

Werner Schafer

Bruno Petrik

Wilhelm Ahrens

Rotger Mitgau

Holger Wacker

Polyoxylalkylene ether with an average molecular weight of 400 to 10,000 with at least one terminal hydroxyl group and at least one lateral --SO.sub.3 X group (X=hydrogen, alkali metal or ammonium ion) is disclosed. The polyoxyalkylene ether is obtainable by the statistical or blockwise addition reaction of (a) .alpha.-alkylene oxides with 2 to 14 carbon atoms or mixtures thereof and (b) allyl and/or methallyl glycidyl ethers to monohydric to quadrihydric aliphatic alcohols with up to 8 carbon atoms, the ratio of component (a) to component (b) being selected so that at least one allyl ether group is linked to the average molecule, reacting the polymer by a known reaction with, based on the allyl ether groups, at least equimolar amounts of a compound of the formula HSO.sub.3 Y (Y=alkali or ammonium ion) and if necessary, exchanging the cation Y against a hydrogen ion also by a known procedure. The compounds are suitable as polyol components for the preparation of stable, ionic, aqueous polyurethane dispersions with a high solids content.

Polyoxyalkylene ethers having hydroxyl and sulfonate groups and their

Polyoxylalkylene ether with an average molecular weight of 400 to 10,000 with at least one terminal hydroxyl group and at least one lateral --SO.sub.3 X group (X=hydrogen, alkali metal or ammonium ion) is disclosed. The polyoxyalkylene ether is obtainable by

Polyoxyalkylene ether having hydroxyl and sulfonate groups and their use

A backing sheet for the weathering-resistant coating of thin, plane backings in continuous presses without recooling comprising

Backing sheet for the weathering-proof coating of thin, plane backing in

A thermosetting adhesive containing as the active components

Thermosetting adhesive

The invention relates to a process for flexibilizing epoxide resins by the addition of polymers which contain carboxyl groups by adding to the epoxide resins before they are cured, copolymers which are obtained by the conventional polymerization of:

Process for flexibilizing epoxide resins

The invention relates to a curable adhesive based on a reactive acrylate and/or methacrylate copolymer. The reaction principle, on which the curing of the adhesive is based, is the reaction of the hydroxyl groups of the .omega.-hydroxyalkyl esters of acrylic and/or methacrylic acids with the isocyanate groups of the polyisocyanates or their partial reaction products with polyols. The inventive adhesives can be used without solvents or with only a slight content of organic solvents. They adhere well to plastic and metal surfaces, even when exposed to the effects of water or water vapor. The best values for the drum peel strength are obtained from acrylic copolymers whose molecular weight falls in the range of 1,000 to 3,000.

Curable adhesive

The invention relates to a hardenable adhesive, which contains as effective components at least one polyol and one polyisocyanate and/or their prepolymers as well as additionally conventional additives, such as, accelerators, gluing auxiliaries, pigments and/or fillers. It is characteristic of the inventive adhesive that it contains, as a polyol, the reaction product of a novolak of average molecular weight from 300 to 1200 with an oxirane of the general formula ##STR1## in which R.sup.1 is hydrogen, or an optionally halogenated hydrocarbon group with 1 to 4 carbon atoms or the --CH.sub.2 OR.sup.2 group, in which R.sup.2 represents an alkyl or an alkenyl group, the R.sup.1 group within the polymeric molecule being the same or different, there being added, on the average, 1 to 7 moles of the oxirane per hydroxyl group of the novolak, and the polyol and the polyisocyanate being present in such a ratio that 0.95 to 1.25 isocyanate groups of the polyisocyanate correspond to one hydroxyl group of the polyol. The inventive adhesives are liquid, adhere well to plastic surfaces and have a high peel strength. They are resistant to the effects of water and moisture.

Hardenable adhesive

A process for making carrier sheets of paper, treated with aqueous solutions of heat-hardenable, aminoplast condensation resins, such as, the reaction products of melamine, urea, thiourea, and like aminoplast constituents with formaldheyde, in which the treated sheet is stretched, as by passing it over broad-drawing rollers while it is in a warm-deformable condition (at a temperature between about 80.degree. to 130.degree.C), transversely with respect to the grain of the paper and, if desired, longitudinally with respect to the grain of the paper, and the treated stretched sheet is then cooled to a temperature of about 30.degree.C by blowing with air or passing the same over cooling rollers. The treated sheet may be stretched after it has passed through a heated drying channel, to dry and procondense the heat-hardenable aminoplast condensation resin, and before the temperature has dropped below that at which the sheet is no longer in a warm-deformable condition or the sheet may be cooled after passage through the heated drying channel and then reheated to a warm-deformable condition. The treated, stretched sheets of the present invention are pressed on wood panels in a heated hydraulic press and preferably in a heated short-cycle press.

Growing community of inventors

Essen, Germany

Dietmar Schedlitzki