Hoechst Aktiengesellschaft

Herberts Gmbh

Udo Bastian

Hans-Jerg Kleiner

Joachim Gersdorf

Rainer Krause

Gerhard Kiessling

Manfred Stein

Process for producing a multi-layer lacquer coating by the application of a coat of clear lacquer including coating agents which are curable exclusively by polymerization in radicalic and/or cationic manner to a dried or crosslinked colored and/or effect-producing basecoat film process is performed in light having a wavelength of over 550 nm or subject to the exclusion of light. The application step is followed by initiation or implementation of curing of the clear-lacquer film by high-energy radiation. The process is particularly suitable for producing multi-layer lacquer coatings in the automobile industry.

Process for producing multi-layer coatings by the use of clear lacquers

A process for the production of flexible impregnated protective, auxiliary and insulating materials on a fibre basis for electrical purposes by the application of an impregnating agent to the material to be impregnated, followed by curing, characterised in that a solvent-free impregnating mass containing one or more olefinically unsaturated, radically polymerisable polyesters, which contain one or more radically polymerisable monomers as reactive diluents, one or more plasticizing agents and optionally one or more peroxide-free radical initiators is applied to the material to be impregnated and curing is then carried out with high energy radiation and optionally by further heating.

Process for the production of flexible protective, auxiliary and

The invention relates 6-acyl-(6H)-dibenz[c,e][1,2]oxaphosphorine-6-oxides of the formula ##STR1## wherein each of R.sup.1, R.sup.2 and R.sup.3 may be present one or more times and R.sup.1, R.sup.2 and R.sup.3 represent halogen having an atomic number of from 9 to 35, alkyl or alkoxy each having from 1 to 6 carbon atoms and wherein Ar represents an aromatic hydrocarbon group having from 6 to 10 carbon atoms. The invention further relates to a process for the preparation of the afore-mentioned compounds and polymerizable compositions containing them as an essential ingredient as a photo-initiator. Finally the invention relates to 6-alkoxy-(6H)-dibenz[c,e][1,2]oxaphosphorin of the formula II ##STR2## wherein each of R.sup.1 and R.sup.2 may be present once or more times and R.sup.1 and R.sup.2 represent halogen having an atomic number of from 9 to 35, alkyl or alkoxy each having from 1 to 6 carbom atoms, at least one R.sup.1 being, however, halogen, and wherein R.sup.4 represents alkyl having from 1 to 6 carbon atoms.

6-acyl-(6H)-dibenz[c,e][1,2]oxaphosphorin 6-oxides, their preparation

The invention relates 6-acyl-(6H)-dibenz[c,e][1,2]oxaphosphorin-6-oxides of the formula ##STR1## wherein each of R.sup.1, R.sup.2 and R.sup.3 may be present one or more times and R.sup.1, R.sup.2 and R.sup.3 represent halogen having an atomic number of from 9 to 35, alkyl or alkoxy each having from 1 to 6 carbon atoms and wherein Ar represents an aromatic hydrocarbon group having from 6 to 10 carbon atoms. The invention further relates to a process for the preparation of the afore-mentioned compounds and polymerizable compositions containing them as an essential ingredient as a photo-initiator. Finally the invention relates to 6-alkoxy-(6H)-dibenz[c,e][1,2]oxaphosphorin of the formula II ##STR2## wherein each of R.sup.1 and R.sup.2 may be present once or more times and R.sup.1 and R.sup.2 represent halogen having an atomic number of from 9 to 35, alkyl or alkoxy each having from 1 to 6 carbon atoms, at least one R.sup.1 being, however, halogen and wherein R.sup.4 represents alkyl having from 1 to 6 carbon atoms.

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Ratingen, Germany

Udo Bastian