Ems Inventa Ag

Ems-chemie Ag

Inventa Ag Fur Forschung Und Patentverwertung Zurich

Inventa Ag Fur Forschung Und Patentverwertung

Ems-american Grilon Inc.

Eduard Schmid

Roman Eder

Ivano Laudonia

Wolfgang Griehl

Ornulf Rexin

Hans-Joachim Schultze

Friedrich S Buehler

Rainer Frische

Bernd Best

Manfred Hoppe

Klaus Wollmann

Helmut Thullen

Renate Gross-Lannert

Fritz Buehler

Botho Hoffmann

Manfred Hewel

Georg Stoeppelmann

Heinz G Hoff

Ralph Kettl

Etienne Aepli

Hanns-Jörg Liedloff

Reinhard Hans Hagen

Walter Isler

Helmuth Thullen

Werner K&auml;gi

Peter Meier

Hansj&ouml;rg Ernst

Viktor Baron

Roland Leimbacher

Gion Antoni Tuor

David Jarvis

Doris Luedi

Urs Wild

The present invention relates to polyamide oligomers with linear or branched chain structure with a number average molar mass of 800 to 5000 g/mol, with basic end groups which are at least partially NHend groups and carboxyl end groups, produced by condensation of polyamide-forming monomers, the concentration of NHend groups being at most 300 mmol/kg and in that these end groups are present in excess in a ratio to the carboxyl end groups.

Polyamide oligomers and their use

The invention relates to a polymer mixture of partially crystalline aliphatic polyamides and partially aromatic polyamides, the proportion of aliphatic polyamides being more than 50% by weight and the quantitative ratio of the aliphatic carbon atoms to amide bonds in the aliphatic polyamides being in the range of 8:1 to 12:1 and the partially aromatic polyamides, which are present in deficit, having, in addition to hexamethyleneterephthalamide (6T) units, further partially aromatic and/or aliphatic amide units and being predominantly partially crystalline. The invention relates furthermore to the use of polymer mixtures of this type for various application fields, in particular for express couplings or connectors for fuel lines.

Polymer mixture of aliphatic polyamides and partially aromatic polyamides, moulded articles thereof and use thereof

The present invention relates to thermoplastic polyamide moulding compositions which contain at least one copolyamide with at least 20% by weight polyamide 12 components and at least one aprotic compound selected from the group of N-alkylated, cyclic carboxylic acid amides with 5 to 7 ring elements and/or of urea derivatives, the alkyl rests of which are linear at the nitrogen or which form a linking of the two N-atoms, and a process for production of the moulding compositions. The thermoplastic polyamide moulding compositions are distinguished by the fact that no solid deposits are formed during thermoplastic conversion.

Thermoplastic polyamide moulding compositions

The present invention relates to the use of thermoplastic polyamide moulding compositions with reduced or strongly reduced formation of solid deposits and/or coverings during a thermoplastic conversion into commodity goods in discontinuous processes in particular injection moulding, and continuous processes such as the extrusion of films, fibers, tubes and jacketings containing at least 20% by weight polyamide and/or at least one copolymer with at least 20% by weight polyamide components.

Use of thermoplastic polyamide molding compositions with reduced formation of solid deposits and/or coverings

A catalyst solution for the anionic polymerization of lactones and/or lactams comprises a salt of at least one compound of the general formula I In this formula (I), Ris H or an aliphatic, cycloaliphatic or aromatic radical with 1 to 12 C atoms which can also have heteroatoms or hetero groups, the radical R, which is the same or different, is H, halogen, C&#x2013;C-alkyl, ethoxy or wherein said solvation agent S comprises N-methylpyrrolidone, N-octylpyrrolidone, N-cyclohexylpyrrolidone, N-octylcaprolactam, tetrabutyl urea or mixtures thereof methoxy, and n=1, 2 or 3, and wherein the salt is dissolved in an aprotic solvation agent S.

Catalyst solution for implementing anionic lactam polymerization, method for production thereof and polyamide moulding compound

The invention relates to a liquid initiator for carrying out anionic lactam polymerization. The liquid initiator contains a conversion product of isocyanate (1) with a protic compound (P) and a base (B) in an aprotic solvation agent (S).

Liquid initiator for carrying out anionic lactam polymerization in an accelerated manner, method for the production thereof and its use

The invention relates to a liquid initiator to be used in anionic lactam polymerization. Said liquid initiator contains a reaction product of carbodiimide with a protic compound and a base in an aprotic solvation agent.

Liquid initiator for accelerating the progress of the anionic lactam polymerization, method for producing the same and the use thereof

The invention relates to a polyamide with low viscosity degradation after remelting which can be produced by anionic polymerization of lactam in the presence of alkaline catalysts and if necessary activators and the method for production of the polyamide. The invention relates furthermore to a method for reprocessing anionically produced polyamide.

Anionically produced polyamide and method for the production thereof and also a method for reprocessing polyamide

A method for the production and use of a catalytically-acting liquid system is offered, which has no or only a small proportion of free lactam, and which is of low viscosity and good storage stability and which directly initiates the anionic lactam polymerization.

Method for producing a liquid system for lactam polymerization

The invention relates to a thermoplastically processible molding material with a two-phase matrix of a partially aromatic copolyamide and an aliphatic polyamide or copolyamide containing permanently magnetic or magnetizable fillers, as well as to a method for producing this molding material and using it for producing molded parts.

Thermoplastically processible molding material

A process for producing composite materials which can be thermally postformed, with a matrix of polylactam produced by means of activated anionic polymerization is offered.

Process for producing compound materials with a polylactam matrix which

A liquid system for executing the anionic lactam polymerization is proposed, which contains activator as well as catalyst and selectively additives and which is liquid at room temperature and remains stable when stored.

Liquid system for executing an anionic lactam polymerization

The present invention relates to thermoplastically formable composite materials of reinforcing fibers in a polyamide 12 matrix, characterized in that the polyamide 12 matrix consists of anionically polymerized laurin-lactam maximally containing 15 weight-% of co-monomers and selectively additives which are determined on the basis of production, processing and use. The invention furthermore relates to a process for producing these composite materials, in accordance with which an activated anionic lactam 12 melt is prepared, which penetrates the fiber arrangement in the liquid state, so that it forms the matrix for a shaped body, the activated melt is final-polymerized under the effects of temperature and pressure in a mold or a tool in such a way that the shape is achieved, and the pre-formed part is subjected to an after-shaping step under the effects of pressure and temperature, if desired. The shaped bodies in accordance with the invention can be used for for producing protective channels, protective elements, support elements, load-bearing frame elements, cover elements, cage structures, structures for transmission systems, roofing of lightweight material, components of sporting goods, machine elements, components for ship and boat building, body and cover elements for vehicle construction, pipes for transporting media and protective conduits, particularly in the electrical field.

Thermoplastically formable composite materials based on polyamide 12

A liquid system for executing the anionic lactam polymerization is proposed, which contains activators as well as catalysts and selectively additives and which is liquid at room temperature and remains stable when stored.

A process for the activated anionic lactam polymerization is proposed, wherein a liquid system is employed, which simultaneously contains activator and anionic catalyst for the polymerization of the lactam.

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Bonaduz, Switzerland

Eduard Schmid