Rohm Gmbh

Rohm Gmbh Chemische Fabrik

Heinz-Juergen Hohage

Guenter Schroeder

Siegmund Besecke

Ralf Liebler

Peter J Arndt

Franz Wenzel

Rolf Neeb

Fritz Schlosser

Scratch resistant and antireflective coatings for synthetic resins, said coatings having a refractive index differing from the value 1.45 by at least 0.01 unit and a thickness ranging from 1 to 40 microns and comprising

Scratch resistant antireflective coatings for synthetic resins

UV absorbing compounds, susceptible to free-radical polymerization, of the formula ##STR1## wherein R is alkyl having from 4 to 12 carbon atoms of which not more than 6 are present in a linear chain, and in particular 2-(2'-hydroxy-3'-methacrylamidomethyl-5'-tert-octylphenyl)benzotriazole, and polymers thereof.

UV-absorbing monomer and polymers thereof

Esters of vinylcarboxylic acids having the formula (I): ##STR1## wherein R is H, or methyl. The esters of the present invention are useful as monomers which can be used to prepare polymers which are used to prepare dental materials.

Esters of vinylcarboxylic acids

What is disclosed is the method for making an N-substituted acrylamide or an N-substituted methacrylamide which comprises reacting an alkyl ester of acrylic acid or of methacrylic acid with an aliphatic amine or with an aromatic amine at a temperature between 50.degree. C. and 180.degree. C. in the presence of a catalytic amount of a dialkyl tin oxide.

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Muehltal, Germany

Heinz-Juergen Hohage