Rohm Gmbh

Rohm Gmbh Chemische Fabrik

Siegmund Besecke

Guenter Schroeder

Werner Ude

Wolfgang Gaenzler

Gunter Schroder

Winfried Wunderlich

Ralf Liebler

Hermann-Josef Siegert

Heinz-Juergen Hohage

Peter J Arndt

Herbert Fink

Franz Wenzel

Gerhard Markert

Manfred Munzer

Fritz Schlosser

Willi Tilch

Achim Riemann

Norbert Sutterlin

Ehrenfried Baumgartner

Guenther Schroeder

Compounds of the formula ##STR1## wherein R is lower alkyl or aryl, Y is oxygen or sulfur, m is 0 or 1, Ar is arylene, and X is halogen, methyl, or aryloxy, or polymers containing repeating units of this kind are prepared from a compound R--P(Y).sub.r Cl.sub.2, where r is 0 or 1 but is never greater than m, by reaction with one or two molar parts of a compound H--ArX in the presence of a Friedel-Crafts catalyst.

Method for making aromatic phosphorus compounds

What is disclosed is a method for making an amide of acrylic acid or of methacrylic acid by the reaction of an alkyl ester of acrylic acid or of methacrylic acid with an amine at a temperature between 50.degree. C. and 180.degree. C., whereby the reaction with the amine is carried out in the presence of a catalytic amount of a compound of a metal of Group IVB of the periodic table of the elements or of a compound of lead, zinc, or tantalum.

Method of making methacrylamides

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

What is disclosed is a continuous one-step method for the preparation of isobutyric acid or a lower alkyl ester thereof by the Koch synthesis, which method comprises reacting propylene, carbon monoxide, and water or a lower alcohol, in the gaseous and liquid phases, in the presence of hydrogen fluoride as a Koch catalyst, at a temperature between 80.degree. C. and 160.degree. C., at a dwell time of the liquid phase of less than 20 minutes, and with a high degree of backmixing, while maintaining the content of propylene in the reaction mixture at less than one percent by weight of the liquid phase, wherein all or part of the propylene, carbon monoxide, and water or lower alcohol can be replaced by binary addition compounds formed pairwise between these materials. In the alternative, isopropylformiate can be continuously rearranged in the presence of hydrogen fluoride to produce isobutyric acid.

Method for making isobutyric acid

Flame retarded polyacrylimide or polymethacrylimide resin foams containing at least 70 percent by weight of cyclic acrylimide or methacrylimide units and incorporating at least 1 percent by weight of phosphorus, present at least partially in the form of a phosphorus compound, XCH.sub.2 --PO(OR).sub.2, wherein R is methyl, ethyl, or chloromethyl, and X is hydrogen, halogen, hydroxyl, or RO--CO--.

Flame-retarded polyacrylamide or polymethacrylimide synthetic resin foam

A method for making multilayered synthetic resin bodies by the coextrusion of thermoplastic molding compounds wherein at least one of the layers in the extruded body is to be protected against UV light, which comprises extruding at least one layer from a thermoplastic molding compound that is formed entirely or predominantly of a copolymer formed between monomers comprising in their molecules groups or structures which, because of their characteristic absorption of ultraviolet light, provide protection against ultraviolet light, together with other, known, monomers.

Method for making multilayered resin bodies having UV-protection and the

An ionically cross-linked acrylic elastomer having a glass transition temperature below 30.degree. C. is prepared by precipitation polymerization of a di- or polyvalent metal salt of acrylic, methacrylic and/or itaconic acid and/or a higher ester of methacrylic acid in an anhydrous organic solvent in which the polymer is insoluble. The metal ions comprise 0.1 to 15% of the monomer mixture.

Process for preparing cross-linked acrylic elastomers

What is disclosed is a process for the continuous production of isobutyric acid or an alkyl ester thereof by the Koch synthesis, which process comprises reacting propylene, carbon monoxide, and water or an alkanol in the presence of hydrogen fluoride in at least one reaction space containing a liquid phase and a gas phase under high pressure, releasing said pressure at least partially, whereby a gas containing organic compounds from said synthesis evolves from said liquid phase, adding oxygen to said evolved gas and at least partially combusting the organic compounds contained therein, then contacting the evolved gas containing the at least partially combusted organic compounds with at least a portion of the water or alkanol to be reacted with said propylene and carbon monoxide, whereby at least a portion of said combusted organic compounds are absorbed by said water or alkanol, returning said water or alkanol containing the absorbed combusted organic compounds to said reaction space, and discharging any unabsorbed gas from the reaction system.

Method for making isobutyric acid or esters thereof

Difficultly flammable polyarylene ether resins containing phosphorus having the structure ##STR1## and methods for making the same.

Polyarylene ethers containing phosphorus

What are disclosed are resinous polyarylene esters containing more than 1 percent by weight of phosphorus and having the formula--CO--A--CO--O--B--O.sub.n, wherein B is a bivalent aromatic group and A represents at least in part

Polyarylene esters containing phosphorus

What are disclosed are phosphorus-containing polyarylene esters,

An aqueous artificial resin dispersion, comprising an aqueous phase and a water-insoluble disperse phase formed from particles containing a copolymer formed in substantial part from a water insoluble or slightly soluble first monomer, wherein the copolymer additionally is formed from a second monomer of the formula ##STR1## wherein R represents hydrogen or methyl, R' represents hydrogen or an alkyl radical with 1 to 12 C-atoms, R' represents an alkyl radical with 7 to 20 C-atoms, and M represents a proton, an alkali metal ion, or an ammonium ion, with the proviso that the aqueous phase is free of low molecular weight, ionic emulsifying agents. Such dispersions are particularly well suited for continuous emulsion polymerization because of the highly stable monomer emulsions formed by mixtures produced according to the invention.

Aqueous artificial resin dispersions free of emulsifying agents

What is disclosed is a method for making amides of the formula ##STR1## wherein R.sub.1 is hydrogen or methyl,

Growing community of inventors

Seeheim-Jugenheim, Germany

Siegmund Besecke