Degussa Aktiengesellschaft

Dynamit Nobel Aktiengesellschaft

Other

Evonik Degussa Gmbh

Giselher Franzmann

Emmanouil Spyrou

Andreas Wenning

Patrick Gloeckner

Peter Denkinger

Werner Andrejewski

Hans-Leo Hulsmann

Alessandro Cerri

Franz-Erich Baumann

Harald Haeger

Georg Oenbrink

Guido Schmitz

Patrick Glöckner

Hans Huber

Uwe Stapperfenne

Bernd Elmenthaler

Martin Schmitthenner

Hartmut M/u/ Ller

Joern-Volker Weiss

Doris Faber

A solvent-containing coating composition contains at least one hydroxyl-containing saturated copolyester, a phenol-formaldehyde resin, a benzoguanamine-formaldehyde resin and/or a blocked polyisocyanate, a catalyst and at least one solvent, and can further contain aids and additives.

Solvent-containing coating compositions

The invention relates to unsaturated, amorphous polyesters based on certain dicidol isomers and on saturated and/or unsaturated dicarboxylic acids.

Unsaturated amorphous polyesters based on certain dicidol isomers

Binders for coating materials that exhibit high flexibility and good hardness contain a polymer-modified resin, containing I) at least one polyester having a hydroxyl group or a carboxyl group or both, and II) at least one glycidyl-containing polyacrylate. The polyester I contains an alcohol component containing of from 0.5 to 80 mol % of a dicidol fraction, and the resin is obtained by free-radical polymerization of the starting component(s) for the preparation of the polyacrylate II in the presence of the polyester I in at least one organic solvent.

Polymer-modified resins

Branched, amorphous, polyester-based macropolyols having a narrow molecular weight distribution and a process for making the macropolyol.

Branched, amorphous, polyester-based macropolyols of narrow molecular weight distribution

A radiation-curable powder coating compositions based on crystalline urethane acrylates, which crosslink to light-stable and weather-stable coating films.

Powder coating compositions comprising crystalline urethane acrylates and use thereof

A radiation curable powder coating composition that contains a) a binder having at least one amorphous urethane acrylate having a glass transition temperature of at least 35&#xb0; C. and a melting point of from 50 to 120&#xb0; C.; and b) an auxiliary, can be crosslinked by radiation to produce a lightfast and weather-stable film.

Radiation curable powder coating compositions and their use

A radiation curable powder coating composition, comprising I.) a binder comprising A) 60-90% by weight of at least one amorphous urethane acrylate; and B) 10-40% by weight of at least one crystalline urethane acrylate; wherein a Tg of a mixture of A) and B) is at least 35&deg; C.; and II.) an auxiliary and an additive, excluding an UV initiator, crosslinks to yield a lightfast and weather-stable film.

An adhesion promoter additive contains at least one unsaturated, amorphous polyester containing 1) an acid component comprising at least one &agr;,&bgr;-unsaturated dicarboxylic acid, and 2) an alcohol component. The alcohol component contains at least 5% of a dicidol mixture of the isomeric compounds a) 3,8-bis(hydroxymethyl)tricyclo&lsqb;5.2.1.0 &rsqb;decane, b) 4,8-bis(hydroxy-methyl)-tricyclo&lsqb;5.2.1.0 &rsqb;decane and c) 5,8-bis-(hydroxymethyl)tricyclo&lsqb;5.2.1.0 &rsqb;decane. Each isomer is present in the dicidol mixture in a proportion of from 20 to 40% by weight. A sum of the isomeric compounds a)-c) is from 90 to 100% by weight.

Adhesion promoter additive comprising an unsaturated, amorphous polyester

A UV curable powder coating composition having a binder containing A) 60-90% by weight of at least one amorphous urethane acrylate and B) 10-40% by weight of at least one crystalline urethane acrylate; and having an auxiliary, crosslinks to form a light- and weather-stable paint film that possesses excellent gloss.

UV curable powder coating compositions

Composite having more than one layer

New hydroxyl polyesters fluid at room temperature, with low viscosities at relatively high molecular weight and very low setting points have alkyl side chains in substantially regular arrangement along preferably unbranched or only slightly branched polyester chains, and are formed by the reaction of monocarboxylic acids and/or monoalkanols or their esters of ethers or polyester building components with additional polyester-forming derivatives. The new polyesters can be used to special advantage, after functionalization, for coatings or as adhesives. Especially advantageous is the fact that they can be used without solvents or with a very low solvent content.

Polyesters containing side chains and the use thereof

A process is disclosed for the prparation of an acylated aminocarboxylic acid which comprises contacting an aminocarboxylic acid, its alkali metal or alkaline earth metal salt with a low alkyl carboxylic acid ester of the formula

Method for the N-acylation of aminocarboxylic acids

An enzyme immobilizate comprising an amorphous siliceous support to which an enzyme is bonded by adsorption via an amino alkoxy silane is regenerated after the enzyme has become inactive by contacting the immobilizate containing the inactive enzyme with a solution of inorganic ammonium sulfate or a solution of primary, secondary, tertiary or quaternary C.sub.1 to C.sub.6 alkyl or hydroxy alkyl ammonium sulfate to desorb the enzyme and then contacting the support with a fresh enzyme solution to adsorb active enzyme to the support.

Regeneration of an enzyme immobilizate

A process has been invented for the racemization of optically active N-acylamino acids in aqueous solution which comprises treating said optically active N-acylamino acids with ketene.

Growing community of inventors

Witten, Germany

Giselher Franzmann