Abstract: Provided herein is a process for producing a polyamide (P) by reaction of a mixture (M) including at least one lactam (component (A)), at least one catalyst (component (B)), at least one activator (component (C)), and at least one oxazolidine derivative (component (D)). Further provided herein is the mixture (M) and the use of an oxazolidine derivative for increasing the crystallization rate of a polyamide (P). Also provided herein is the use of an oxazolidine derivative in a polyamide (P) for producing a molded article from the polyamide (P) for reducing the demolding time of the molded article and the use of an oxazolidine derivative for removing water from a reaction mixture (RM).

Abstract: Disclosed herein is an impact modified composition comprising a first polymer; and a second polymer that is dispersed in the first polymer; where the first polymer and the second polymer are melt polymerized in each other's presence, are phase separated from each other after polymerization; are not reactively bonded with each other; and where a precursor to the first polymer and to the second polymer are soluble in one another prior to polymerization. Disclosed herein too is a method comprising melt polymerizing a first monomer and a second monomer in the presence of each other to form a first polymer and a second polymer; where the first monomer and the second monomer are soluble in each other; where first polymer and the second polymer are phase separated from each other with the second polymer being dispersed in the first polymer; where the first polymer and the second polymer are not reactively bonded to each other.

Abstract: A process for the production of a polyamide is disclosed. The process for production of a polyamide (P) comprises mixing a first mixture (M1), which comprises at least one lactam and at least one catalyst, with a second mixture (M2), which comprises at least one lactam, at least one activator and at least one amine, to give a polymerizable mixture (pM) and then polymerization of the polymerizable mixture (pM) to give the polyamide (P). A polyamide (P) obtainable by the process of the invention is also disclosed, as well as moldings made of the polyamide (P).

Abstract: A process for the production of a polyamide is disclosed. The process for production of a polyamide (P) comprises mixing a first mixture (M1), which comprises at least one lactam and at least one catalyst, with a second mixture (M2), which comprises at least one lactam, at least one activator and at least one amine, to give a polymerizable mixture (pM) and then polymerization of the polymerizable mixture (pM) to give the polyamide (P). A polyamide (P) obtainable by the process of the invention is also disclosed, as well as moldings made of the polyamide (P).

Abstract: Polyamides based on dicarboxylic acids and on diamines are produced in a batch process by 1) feeding the entire amount of monomer composed of dicarboxylic acids, of diamines, and, if appropriate, of further polyamide-forming monomers, in the desired stoichiometry, in a closed stirred-tank reactor, 2) heating the monomer mixture in the stirred-tank reactor, with stirring, and with setting of a certain pressure, to a desired reaction temperature for the production of a prepolymer, 3) if appropriate, completely or partially depressurizing the reaction mixture from stage 2), 4) if appropriate, carrying out further thermal treatment of the reaction mixture from stage 2) or 3), and 5) reacting the reaction mixture from stage 2), 3), or 4) in the melt in a vented extruder for further increase of the molecular weight, with discharge of water vapor, and without use of additional polyamide-forming monomers or of polyamides.

Abstract: The invention relates to a process for the production of saturated fiber structures. The process includes (a) introduction of a fiber structure onto a conveyor belt; (b) application of a solution including monomer and optionally including activator, and optionally including catalyst in at least one line to the fiber structure; (c) passage of the fiber structure with the solution through at least one roll pair in which pressure is exerted on the fiber structure; and (d) cooling of the saturated fiber structure, so that the monomer solidifies.

Abstract: A process arrangement and a process for the production of a fiber-reinforced plastics component made of at least one continuous-fiber-reinforced semifinished textile fiber product with reactive thermoplastic matrix material, where during the manufacture of the semifinished fiber product trimming residues (mR, mA) arise, composed of a composite made of fibers and of the reactive thermoplastic matrix material, and during finishing of the finished plastics component final-trimming residues (mE) arise, composed of a composite of fibers and of polymerized thermoplastic matrix material, and are further processed in a recycling unit to give a recyclate. The trimming residues arising during the manufacture of the semifinished fiber product are polymerized in a preparatory unit and then are delivered in the invention to the recycling unit.

Abstract: A process arrangement and a process for the production of a fiber-reinforced plastics component made of at least one continuous-fiber-reinforced semifinished textile fiber product with reactive thermoplastic matrix material, where during the manufacture of the semifinished fiber product trimming residues arise, composed of a composite made of fibers and of the reactive thermoplastic matrix material. The trimming residues obtained during the manufacture of the semifinished fiber product are supplied to a recycling unit for the provision of a recyclate as reactive, as yet unpolymerized starting material for the production of a further component.

Abstract: A process for the production of fiber-reinforced components or semifinished products is provided, where fibers are saturated with monomer. The process includes at least one of adding flakes including fibers and adding individual fibers. For this, the fibers, the monomer, and the flakes including fibers and/or the individual fibers are added to an injection-molding machine and forced into an injection mold, whereupon polymerization of the monomer is completed in the injection mold. Alternatively a fiber structure on a conveyor belt is saturated with a solution including a monomer, optionally including an activator, and optionally including a catalyst. In a following step, individual fibers and/or flakes including fibers are distributed on the saturated fiber structure, the fiber structure is passed through a roll pair in which pressure is exerted onto the fiber structure, and finally the saturated fiber structure is cooled so that the monomer solidifies.

Abstract: The present invention relates to a process for the production of a fiber-reinforced composite material with a polyamide matrix.

Abstract: The present invention relates to a process for the production of reinforced plastics components. The process includes a) provision of at least one reinforcing material in a cavity of a molding device, b) provision of at least one starting material in a container, c) insertion of the container into the molding device, d) introduction of the at least one starting material from the container into the cavity, wherein the at least one starting material penetrates at least to some extent through the at least one reinforcing material, e) hardening of the at least one starting material with the at least one reinforcing material to give a reinforced plastics component, and f) demolding of the reinforced plastics component. The invention further relates to a device and to an assembly for the production of reinforced plastics components.

Abstract: The invention relates to a process for the production of saturated fiber structures. The process includes (a) introduction of a fiber structure onto a conveyor belt; (b) application of a solution including monomer and optionally including activator, and optionally including catalyst in at least one line to the fiber structure; (c) passage of the fiber structure with the solution through at least one roll pair in which pressure is exerted on the fiber structure; and (d) cooling of the saturated fiber structure, so that the monomer solidifies.

Abstract: The present invention relates to the use of polyolefin copolymers A) for reducing color changes during the heating of polymer compositions which contain at least one thermoplastic polyamide B).

Abstract: The present invention relates to a process for preparing a thermoplastic copolymer from polycaprolactam and thermoplastic polyurethane (TPU), to thermoplastic copolymers thus obtained and to shaped articles formed from copolymers of this type.

Abstract: The present invention relates to a process for preparing a composition comprising (A) at least one lactam, (B) at least one catalyst, (C) an activator from the group consisting of isocyanates, acid anhydrides, acyl halides, reaction products thereof with (A) and mixtures thereof, (D) at least one polyethyleneimine. The invention likewise relates to a composition comprising (i) 0.01 to 10 wt %, based on the sum total of components (A) and (D), of at least one polyethyleneimine, and (ii) 90 to 99.99 wt %, based on the sum total of components (A) and (D), of at least one lactam (A) and/or polyamide obtainable from (A).

Abstract: The present invention relates to polyamide composites containing graphene, a method for producing them and to their use as or for producing a material with gas barrier and/or electroconductive and/or thermally conductive properties and/or a mechanically reinforced material.

Abstract: The present invention relates to a composite component comprising an unfoamed polymer phase and a foamed phase, and to a process for producing the same.

Abstract: The present invention relates to a process for preparing a polyamide based on dicarboxylic acids and diamines, comprising the following stages: A) providing an aqueous monomer mixture composed of dicarboxylic acids and diamines, where the molar ratio of dicarboxylic acids to diamines is adjusted such that, at the outlet of stage C), there is a molar deficiency of dicarboxylic acids or diamines of 1 to 10 mol %, based on the respective other component, B) transferring the aqueous mixture from stage A) into a continuous evaporator reactor in which diamines and dicarboxylic acids are converted at a temperature in the range from 100 to 370° C. and a pressure in the range from 1 to 50 bar, C) transferring the mixture from stage B) into a separator which is operated at a temperature in the range from 100 to 370° C.

Abstract: The present invention relates to a polymerizable lactam composition comprising at least one polymerizable lactam and at least one polaryl sulfone. The present invention further relates to a method of using the polymerizable lactam composition in the manufacture of polyamides and/or polyamide moldings.

Abstract: An expandable pelletized material comprising A) a polymer matrix composed of A1) at least 55% by weight of polyester (based on the entirety of components A1) and A2)) with a total enthalpy of fusion of up to 60 J/g, optionally of one or more melting points in the range from 100 to 300° C. and of one or more glass transition temperatures in the range from 0 to 250° C., and A2) from 0 to 45% by weight (based on the entirety of components A1) and A2)) of one or more thermoplastic polymers different from component A1); B) a physical blowing agent component, and C) optionally further additives is suitable for producing moldable foams for use in the automobile industry, airline industry, construction industry, packaging industry, sports and leisure industry, in transport, in engineering, in lightweight construction, and/or in composite construction.