Basf Aktiengesellschaft

Dr. Beck & Co Ag

Gerhard Lindenschmidt

Martin Weber

Norbert G&uuml;ntherberg

Franz Brandstetter

Herbert Naarmann

Norbert Niessner

Hans Peter Rath

Konrad Knoll

Juergen Hambrecht

Klaus Penzien

Norbert Guntherberg

Rudolf H Jung

Peter Neumann

Erhard Seiler

Alexander Aumueller

Gerd Blinne

Graham Edmund Mc Kee

Michael Fischer

Bernhard Rosenau

Johann Swoboda

Achim Grefenstein

Freddy Gruber

Doris Zeltner

Josef Schwaab

Wolfgang Schulte

Claus Bernhard

Jurgen Hambrecht

Carsten Netze

Walter Regel

Bernhard Scharf

The present invention relates to thermoplastic molding compositions based on ASA (acrylonitrile-styrene-acrylate) with improved flowability and improved extrusion properties. The invention further relates to a process for preparing these thermoplastic molding compositions, their use and also, produced therefrom, reduced-gloss and antistatic films and moldings, and coatings with reduced gloss, and the use of these.

Thermoplastic molding materials

Process for producing laminated sheets or films and moldings having UV-stability and thermal aging resistance

Thermoplastic molding compositions based on acrylonitrile-styrene-acrylate polymers

Thermoplastic molding compositions

Thermoplastic moulding compounds

Crosslinking agents for emulsion polymers

An electrically conductive surface layer is produced on moldings consisting of plastics which are soluble or swellable in organic solvents, the conductivity of the said layer being based on a system, incorporated therein, of

Production of an electrically conductive surface layer on moldings

Thermoplastic molding masses comprise a styrene and/or .alpha.-methylstyrene-acrylonitrile copolymer and a polyamide based on piperazine.

Thermoplastic molding masses of styrene-acrylonitrile and polyamide

Thermoplastic molding masses based on the copolymerization of styrene and/or .alpha.-methylstyrene and acrylonitrile, which may be modified to be impact resistant with rubberlike polymers, are made antistatic by adding 0.01 to 1.5 percent by weight of a graft polyol which is a polyhydroxy-polyalkylene polyether modified with styrene-acrylonitrile copolymers.

Antistatic thermoplastic molding masses containing styrene-acrylonitrile

Halogen-containing s-triazine compounds of the formula I ##STR1## where R is OH, R.sup.1, R.sup.2 or R.sup.3, R.sup.1 is ##STR2## where R.sup.4 is lower alkyl or lower haloalkyl, X is bromine or chlorine, k and n are 0 or integers from 1 to 5 and k+n is not more than 5, R.sup.2 is ##STR3## where R.sup.5 is lower alkyl or lower haloalkyl, Z is bromine or chlorine, s and p are 0 or integers from 1 to 4 and s+p is not more than 4, and R.sup.3 is ##STR4## where R, R.sup.5, Z, s and p have the above meanings. The compounds claimed are prepared by reacting cyanuric chloride with a phenol of the formula III ##STR5## and a benzene derivative of the formula IV ##STR6## in the presence of a base. The products thereby obtained are used for flameproofing thermoplastics, in particular styrene/acrylonitrile copolymers made impact-resistant with rubber (ABS resins).

Halogen-containing s-triazines

A mixture of brominated oligomeric polystyrenes, having a degree of polymerization of from 3 to 400, and low molecular weight brominated aromatic compounds of the diphenyl ether type is obtained by polymerizing the non-brominated starting materials, in a halohydrocarbon solvent, using a Lewis acid catalyst. The reaction mixture is then brominated and extracted with water to remove hydrogen bromide and catalyst, and the solvent and volatile constituents are separated from the product. The bromination is carried out at from -30.degree. C. to +130.degree. C. The final mixtures have a low melt viscosity and are therefore particularly suitable for incorporation, as a flameproofing agent, into thermoplastics.

Preparation of mixtures of brominated polystyrenes and brominated

Molding materials containing styrene-acrylonitrile copolymers, in which an additional essential ingredient is from 0.1 to 2.0% by weight, based on the copolymer, of a three-block polymer X-Y-X, where X is a terminal ethylene oxide block and Y is a central propylene oxide block. The proportion of terminal ethylene oxide blocks X, based on block copolymer, is from 5 to 20% by weight, while the central propylene oxide block Y has a number-average mean molecular weight of from 700 to 3,000 and its proportion is from 80 to 95% by weight, based on block copolymer. The number-average molecular weight of the sum of the two terminal blocks X is from 140 to 1,000. The novel molding materials may be used for the manufacture of moldings, since the three-block copolymer X-Y-X advantageously influences the processing characteristics of styrene-acrylonitrile copolymers, and in particular broadens the range of conditions under which they may be injection-molded, without adversely affecting the mechanical properties of the styrene-acrylonitrile copolymers. Accordingly, the injection molding scrap rate can be kept very low.

Molding materials containing styrene/acrylonitrile copolymers and

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Leimen, Germany

Gerhard Lindenschmidt