Bayer Aktiengesellschaft

Bayer Akteingesellschaft

Josef Merten

Rudolf Binsack

Ulrich R Grigo

Christian Lindner

Leo Morbitzer

Ludwig Trabert

Karsten J Idel

Ludwig Bottenbruch

Dieter Margotte

Uwe Westeppe

Heinrich Haupt

Dieter Freitag

Dieter Wittmann

Hugo Vernaleken

Dieter Neuray

Walter Heitz

Siegfried Adelmann

Karl-Heinz Kohler

Harald Selbeck

Klaus-Peter Arlt

Hans-Josef Buysch

Rolf Dhein

Karl-Heinz Ott

Herbert Eichenauer

Rolf-Volker Meyer

Dieter Dieterich

Karl-Erwin Piejko

Karsten-Josef Idel

Uwe Claussen

Helmut Reiff

Claus H Wulff

Erhard Tresper

Wolfgang Alewelt

Hartmuth Buding

Peter Tacke

Friedrich Fahnler

Dietrich Michael

Bert Brassat

Peter Markusch

Heinrich Krimm

Bernd Melchior

Harry Rohr

Wolfgang Richter

Helmut Korber

Gunther Lenz

Hermann Schnell

Ulrich Haberland

Gerhard Heinze

Gunter B Weber

Horst-Gunter Kassahn

Klaus Friederich

Manfred Schon

The invention relates to thermoplastic molding compounds of 70 to 99.5% by weight thermoplastic polyamides and 30 to 0.5% by weight hydrogenated nitrile rubber and 0 to 29.5% by weight thermoplastic resin components and, optionally, standard additives in typical quantities. These thermoplastic molding compounds show high strength values, very good moldability and, above all, high weathering resistance.

Thermoplastic molding compounds of polyamide and hydrogenated nitrile

The invention relates to thermoplastic polyamide moulding compositions with improved toughness at low temperatures consisting of at least 60% by weight of polyamide and from 3 to 35% by weight of graft rubbers from the group comprising diene rubbers and acrylate rubbers, which are produced in that a mixture of the two components is produced in the presence of from 0.01 to 5% by weight of a radical forming agent and the moulding compositions are then heated below the polyamide melting point as far as possible in the absence of oxygen.

Process for the production of moulding compositions from thermoplastic

This invention relates to polyamides which have been modified with special silicone graft rubbers to render them impact resistant and are tough at low temperatures and have high processing stability even at high temperatures and good surface properties. The moulding compounds, which are distinguished by excellent mechanical properties even at low temperatures, consist of at least 40% by weight of polyamide and special graft rubbers with a multishell core/sheath structure having a silicone-based core.

Impact resistant polyamide moulding compounds modified with silicone

The reaction of--preferably partially crystalline--polyamides with monoisocyanate or monoisocyanate precursors gives products having improved flowability, mould release and/or notched impact strength.

Polyamide modified with monoisocyanates

The invention relates to thermoplastic molding compositions showing improved properties, more especially improved dimensional stability and notched impact strength, particularly at low temperatures, in the form of a mixture of at least 35% by weight of a copolyamide containing polydiorganosiloxane carbonamide units and/or of a mixture of partly crystalline polyamides and (co)polyamides containing polydiorganosiloxane carbonamide units and from 1 to 65% by weight of graft products of vinyl polymers on rubbers. The invention also relates to the dimensionally stable molding compositions tough at low temperatures characterized above which additionally contain amorphous siloxane-free polyamides added in quantities of up to 64% by weight.

High-impact dimensionally stable polyamide molding compositions

This invention relates to high-impact mixtures of polyamides and polymers based on polyacrylates or polybutadienes having improved processing behaviour and improved technological properties and to the production of these polymers by a multistage process.

High-impact polyamide moulding compositions

Unfilled, unreinforced polyamide moulding compounds are disclosed which have high rigidity and notched impact strength and are highly fluid in the molten state, containing aliphatic polycarbonate polyurethanes which are substantially unbranched in the carbon chain, prepared from polyhexamethylene carbonate diols and/or mixtures thereof with oligo- or polyalkylene glycols having 4-100 carbon atoms and 1,6-diisocyanatohexane.

Polyamides having high notched impact strength and high fluidity in the

Thermoplastic moulding materials, with improved toughness at low temperatures, of polyamide and cross-linked graft rubbers from the diene rubber and acrylate rubber series, obtained by heating blends of the two components below the melting point of the polyamide.

Molding compounds of thermoplastic polyamide and graft rubber

This invention relates to thermoplastic molding compositions having improved impact strength at low temperatures comprising polyamides and grafted, at least partially crosslinked diene rubbers and/or acrylate rubbers having a bimodal rubber particle size distribution.

High impact thermoplastic polyamide molding compositions

Block copolyamides consisting of from 1 to 80% by weight of hydrogenated telechelic diene polymers having M.sub.n molecular weight of from 400 to 6000 and from 99 to 20% by weight of polyamides or polyamide-forming components.

Elastomeric block copolyamides

A mixture comprising 1. from 70 to 99% by weight of a predominantly aromatic polycarbonate; and 2. from 30 to 1% by weight of a polyolefin graft polymer of (a) 70 to 95% by weight of a graft base consisting of a homopolymer of aliphatic and/or aromatic monoolefins or of a copolymer of these olefins, and up to 50% by weight of other monoolefinically unsaturated, radially polymerizable compounds and/or up to 5% by weight of diolefins, and (b) 5 to 30% by weight of at least one graft-polymerizable vinyl compound, the olefin graft polymers having been obtained by contacting a melt of the graft base (a) with oxygen or an oxygen-containing gas for at most 10 min. with intensive mixing under a pressure of from 1 to 150 bars and at a temperature of from 80.degree. C. to 300.degree. C., adding the vinyl compounds (b) to be grafted on immediately afterwards with intensive mixing in the absence of oxygen or oxygen-containing gas and removing the residual monomers after the graft polymerization reaction.

Polycarbonate-polyolefin moulding compositions

A method for making a light-collector of a transparent plastic and a fluorescent dye, wherein the monomers forming transparent plastics are mass-prepolymerized in the presence of radical catalysts and the fluorescent dye is added before, during or at the end of prepolymerization, and then polymerizing the mixture to completion by adding another catalyst, also at pressures of from 2 to 20 bars and at temperatures of from 50.degree. to 160.degree. C., and the use of the light-collector thus produced in combination with photovoltaic elements, preferably based on Ga/As or Si.

Method for making fluorescent light-collectors

Block copolymers

A high molecular weight stabilized polymer composition containing p-polyphenylene sulfide and a siloxane.

Use of siloxanes for the modification of high molecular weight

A process for the production of modified polypropylene particles by polymerizing vinyl monomers in aqueous suspension wherein (a) an aqueous suspension is prepared which, based on 100 to 2000 parts by weight of water, contains 100 parts by weight of polypropylene particles, 4 to 30 parts by weight of a polar vinyl monomer and based on 100 parts by weight of the monomer, 0.1 to 10 parts by weight of a radical chain polymerization initiator which has a half life of at least 2 h at a temperature of 80.degree. to 135.degree. C. and 10 to 1200 parts by weight of an organic solvent which is capable of swelling polypropylene, of which the boiling point at 760 Torr is at least 100.degree. C. and which is miscible with the monomers in any proportion; (b) the aqueous suspension is heated without decomposition of the initiator, the polypropylene being swollen and the monomer penetrating into the polypropylene, after which (c) the aqueous suspension is kept at temperatures of .gtoreq.85.degree. C. until polymerization of the monomer has ceased. The modified polypropylene is used to improve the mechanical properties of unmodified, optionally glass-fibre-reinforced polypropylene.

Process for the production of polar-modified polypropylene and its use

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Korschenbroich, Germany

Josef Merten