Abstract: The instant invention provides an aromatic polyamide composition for molding which is of superior rigidity, strength, toughness, dimensional stability, resistance to chemicals, external surface appearance and sliding characteristics in high-humidity, high-temperature environments, which has a low coefficient of linear expansion and which is of low warpage.

Abstract: A process for producing polyamides from dinitriles and diamines in a continuous reaction using subsequent heating steps. In particular, the process involves contacting a dinitrile, a diamine, water, and optionally a catalyst to form a reaction mixture; heating the reaction mixture to a first elevated temperature of between about 180 to about 240° C., maintaining said temperature for about 0.10 to about 20 hours, and optionally controlling the pressure in this heating step by venting; heating the reaction mixture to a second elevated temperature of between about 250 to about 350° C., adding water to the reaction mixture before or after the second elevated temperature is reached, maintaining the pressure in the second heating step above atmospheric pressure by venting at least some of the water, and maintaining the second elevated temperature for a period of about 0.10 to about 10 hours; and recovering the polyamide.

Abstract: The present invention provides elastomeric copolyester amides, elastomeric copolyester urethanes, and methods for making the same. The polymers that are based on &agr;-amino acids and possess suitable physical, chemical and biodegradation properties. The polymers are useful as carriers of drugs or other bioactive substances.

Abstract: The improved polyamide production method of the present invention is characterized by including a step of accurately regulating the molar balance between a diamine component and a dicarboxylic acid component to a desired balance in a batch-wise regulation tank, thereby preparing a slurry liquid substantially free from the amidation reaction. The slurry liquid thus prepared is fed to a batch-wise or continuous polymerization reactor, where the amidation reaction is proceeded to easily produce polyamide having a desired balance of the diamine component and the dicarboxylic acid component without causing a problem such as foaming, solidification, etc.

Abstract: A process for preparing inherently light- and heat-stabilized polyamides comprises polymerizing in the presence of at least one triacetonediamine compound of the formula where R is hydrogen or hydrocarbyl having from 1 to 20 carbon atoms, preferably alkyl having from 1 to 18 carbon atoms, or benzyl.

Abstract: A method of production of a homopolymer or copolymer or homo-oligomer or co-oligomer product characterised in that the product is obtained by condensation reaction of a diaminoanthracene, substituted or not, optionally with a diiminoanthracene substituted or not in the absence of anthraquinone substituted or not.

Abstract: The present invention relates to a multilayer structure comprising a material covered with a copolymer having polyamide blocks and hydrophilic blocks where the copolymer has a melting point of less than 135° C.

Abstract: In the production of polyamide by the melt-polymerization of the present invention, the polymerization conditions are rapidly and accurately controlled by a near-infrared spectroscopy to enable the efficient production of a desired polyamide with a good stability in its quality.

Abstract: The present invention relates to a thermosetting composition which comprises: (A) a polyhemiacetal ester resin having a repeat unit represented by formula (1): wherein R1 and R2 are a bivalent organic group, and Y is an oxygen atom or a sulfur atom, and (B) a compound having in the molecule two or more reactive functional groups which can form a chemical bond with the carboxyl group, and optionally, (C) an acid catalyst. The thermosetting composition gives cured products having excellent chemical properties, physical properties, adhesion, smoothness and weathering resistance at relatively lower temperatures and have excellent storage stability, and can be utilized as solvent cutback type, solventless liquid type of 100% effective component or powder thermosetting compositions.

Abstract: Polymer derivatives based upon polyalkyleneimine backbones having a color stabilizing-effective amount of their reactive amino functionalities substituted by either a carboxylic acid or an amino-protecting group such as urea, are disclosed. Methods for preparing said derivatives are also disclosed. Fiber lubricant compositions comprising said polymer derivatives, and the resistance to yellowing associated with such lubricants are disclosed. Also disclosed are methods for treating fibers using the polymer derivatives.

Abstract: An aqueous composition suitable for coating a substrate is described. The composition comprises a reaction product of (i) at least one carboxylic acid containing from 3 to 22 carbon atoms; and (ii) at least one unsubstituted or substituted aliphatic amine or polyfunctional aromatic amine, containing from 2 to 25 carbon atoms; (iii) a complex crosslinking agent of a metal from groups Ia, IIa, IIIa or IVa of the first and second rows of the transition metals from the Periodic Table of Elements; (iv) a resin or oil, the weight ratio of the resin or oil to the sum of (i), (ii) and (iii) being at least 2.5:1; and (v) a thickener, a continuous dry layer obtained by applying the composition to Western Red Cedar providing a contact angle with water not exceeding 80°.

Abstract: A method of producing a polyamide resin by reacting with at least one diamine compounds at least one linear polyester resin consisting of at least one dicarboxylic acid component and at least one diol component and having an intrinsic viscosity of not less than 0.2 dl/g, so that the at least one diol component of the linear polyester resin is substituted by the diamine compound, resulting in the polyamide resin as a reaction product, wherein the improvement comprises: at least one of a carboxylic acid-activator and an inorganic salt being present in a reaction system of the linear polyester resin and the diamine compound.

Abstract: Polyamides are produced by reacting aminocarboxylic acid compounds of the general formula I H2N—(CH2)m—COR1  (I) where R1 is OH, O—C1-12-alkyl or NR2R3, where R2 and R3 are independently hydrogen, C1-12-alkyl or C5-8-cycloalkyl, and m is an integer from 3 to 12, optionally in a mixture with aminonitriles and their hydrolysis products and optionally in the presence of water, in a liquid phase at elevated pressure and elevated temperature in the presence of metal oxides as heterogeneous catalysts, the metal oxides being used in a form which permits mechanical removal from the reaction mixture and being removed from the reaction mixture during or after the polymerization.

Abstract: Compositions comprising: (a) from about 51% to about 99.9% by weight of a polyamide resin component; and (b) from about 0. 1% to about 49% by weight of a wax component, wherein the polyamide resin component comprises a reaction product obtained by reaction of a dimerized fatty acid reactant, a carboxylic acid reactant and a diamine reactant, are disclosed for use in thermographic printing. The polyamide resin/wax component compositions disclosed herein exhibit decreased bloom and enhanced scratch/scuff resistance.

Abstract: A process for making partially aromatic polyamides is provided in which an aromatic dicarboxylic acid component, at least 20-100% by weight of the dicarboxylic acid in the acid component is in the form of an alkylated ester, and a diamine component, comprising a diamine having from 6-12 carbon atoms, are admixed in the presence of water and with heating to form polyamide having from 1-100% on a molar basis of N-alkylated amide and amine groups. The polyamides are particularly useful in the manufacture of products intended for use at elevated temperatures or products in which retention of properties at elevated temperatures is required, including articles using injection molding technology, parts for automotive end-uses and electronics. The polyamides can also be formed into films and fibers for use in associated products.

Abstract: Biodegradable polyesteramides as defined in the specification are obtained by reacting a mixture consisting essentially of a1) a mixture consisting essentially of 35 to 95 mol % of adipic acid or ester-forming derivatives thereof, 5 to 65 mol % of terephthalic acid or ester-forming derivatives thereof, and 0 to 5 mol % of a compound containing sulfonate groups, a2) a mixture consisting essentially of 95.5 to 0.5 mol % of a dihydroxy compound, 0.5 to 99.5 mol % of an amino-C2-C12-alkanol or an amino-C5-C10-cycloalkanol, 0 to 50 mol % of a diamino-C1-C8-alkane, and 0 to 50 mol % of a 2,2′-bisoxazoline of the formula I  wherein R1 is as set forth in the specification, and a3) 0 to 5 mol %, based on a1), of a compound D as set forth in the specification; and other biodegradable polymers and thermoplastic molding compositions, their manufacture and their use for producing biodegradable moldings, adhesives, foams, and coatings.

Abstract: In a process for producing polyamides by polymerization of lactams in the presence of metal oxides as heterogeneous catalysts, the metal oxides are used in a form which permits mechanical removal from the reaction mixture and are removed from the reaction mixture in the course of or on completion of the polymerization.

Abstract: A process of increasing the melt processing of synthetic polyamides, in particular pigmented and/or filled synthetic polyamide, by adding thereto an additive having the formula (I) wherein R1 represents a methyl group as such or in the form of a stabilizer masterbatch composition. The invention also relates to modified synthetic polyamides obtainable by this process having improved properties due to the stabilization effect of the compound of the above formula (I).

Abstract: A polyamide having repeating units represented by formula (1), wherein R1 represents a divalent hydrocarbon residue optionally having in the structure a heteroatom having no active hydrogen. The polyamide has a high refractive index, is biodegradable, and is useful as a material for fibers and plastics.

Abstract: The invention relates to a method for the hydrolytic polymerisation of &egr;-caprolactam to polyamide-6, comprising a step (a) in which ring opening of part of the &egr;-caprolactam to the corresponding amino caproic acid is effected in the presence of water and a step (b) in which polyaddition and polycondensation are effected under preferably anhydrous reaction conditions, in which at least one of the steps (a) and (b) is carried out in a reactor in which a self-renewing interface between the molten phase and the gas phase with a large surface/volume ratio of the molten phase is effected. The method is preferably effected in an horizontal scraped-surface reactor, since relatively strong mixing of the molten phase can be achieved in these and the molten phase is present in a thin layer, a large gas volume is present having a relatively high partial pressure of the water vapour and the thin layer is constantly renewed by shear forces.

Abstract: The present invention relates to new polyamide oligomers. These oligomers can be conjugated to lipids, nucleic acids, peptides, proteins, etc. The oligomer-lipid conjugates can be used to form liposomes, virusomes, micelles, etc., optionally containing drugs or biological agents. The polyamide oligomers are heterobifunctional allowing the attachment of other suitable ligand compounds (e.g., a targeting moiety). In addition, methods of use for the liposomes, virusomes, micelles, etc., are provided.

Abstract: The present invention provides a polyamide composition comprising: a polyamide containing an alkylene oxide group; and a metal salt. The polyamide composition of the present invention has long lasting antistatic properties and a lower surface resistivity than the polyamide alone.

Abstract: A process for forming an amide bond comprising reacting a carboxylic acid with an amine carboxylate salt, in the presence of an inorganic base.

Abstract: Thermoplastic elastomeric polymers which contain polyether blocks having tetramethylene ether repeat units, and polyamide blocks, have improved elastomeric properties such as higher unload power and lower tensile set, when the polyether blocks also contain 2-alkyltetramethylene ether repeat units. The polymers are useful as molding resins and for fibers.

Abstract: The present invention relates to a treating agent for liquid crystal alignment, which is an agent for liquid crystal alignment to be used for a method in which polarized ultraviolet rays or electron rays are irradiated on a polymer thin film formed on a substrate in a predetermined direction relative to the substrate plane, and said substrate is used for aligning liquid crystal without rubbing treatment, wherein said agent for liquid crystal alignment contains a polymer compound having photochemically reactive groups in the polymer main chain and a glass transition temperature of at least 200° C.

Abstract: These prepolymers having maleimide functions (f) consist in the reaction products of at least one maleic anhydride represented by formula (I); of at least one compound (II) having at least one —NH2 function and at least another function F selected from the group consisting of —OH, —NH2, —NH—, —COOH, —COOR3 or —OOCR3; of at least one compound (III) capable of forming the chain of the prepolymers by polycondensation and/or polyaddition, said compound(s) (II) having first reacted with said maleic anhydride(s) (I) in order to open the maleic anhydride rings with formation of maleamic acid functions (f′), said maleamic acid functions having then been at least partially closed again under the action of heat into maleimides N-substituted by groups functionalized by a function F, the chain of said prepolymers having been formed by polycondensation and/or polyaddition of the N-substituted maleimide formed bearing the function F; of compound(s) (III) of uncyclized p

Abstract: An aliphatic polyester amide which is hydrolysis-resistant includes a ternary polycondensation product of monomeric constituents composed of a monomeric constituent A which is at least one diol having a general formula: HO—R1—OH, where R1 is an aliphatic residue having 2-16 carbon atoms; a monomeric constituent B which is at least one dicarboxylic acid having a general formula: HOOC—R2—COOH, where R2 is an aliphatic residue having 1-14 carbon atoms; and a monomeric constituent C which is at least one diamine having a general formula: H2N—R3—NH2, where R3 is an aliphatic residue having 2-16 carbon atoms and is present in an amount of up to about 5% by weight based on total weight of the monomeric constituents, wherein polycondensation proceeds in the presence of a catalyst comprised of constituent D, which is a metal-containing catalyst, in combination with constituent E, which is at least one of an organic phosphorus compound and an inorganic phosphorus compound, and wherei

Abstract: The invention concerns a process and device for producing high-viscosity or highly stabilized, reaction-stable polyamides, in particular polyamide 6, with reactive amino end groups of less than 50 &mgr;eq/g and for continuously demonomerizing polyamides. The object of the invention is to produce simply, reliably and economically a high-viscosity or highly stabilized reaction-stable polyamide, in particular polyamide 6, and if necessary to carry out continuous demonomerization. According to the invention, the molten polyamide is brought into intimate contact, or intimately mixed with preheated nitrogen in a reaction system in at least one stage and a specific dwell time is set for the melt in a liquid phase. During the production of polyamide 6, expelled lactam is processed and fed to a polymerization reactor.

Abstract: A process for improving characteristics such as, whiteness retention, degradation, and dyeability of a polyamide by contacting the polyamide with thiocyanate. A polyamide produced by the process has improved dyed color depth, dyed color uniformity, hue, elimination of light dyeing ends, protection of dye sites from degradation, protection from UV degradation, reduced yellowing or oxidation, and/or resistance to loss of dyeability.

Abstract: The present invention provides a method for producing a formed article from a dope comprising a polyphosphoric acid solvent and a polymer soluble in polyphosphoric acid, which includes using a production apparatus containing an apparatus for stirring and uniformly dispersing or homogenizing a dope and a pump apparatus for delivering the uniformly dispersed or homogeneous dope, wherein at least one of the apparatus and the pump apparatus has a part that comes into contact with the dope. According to the present invention, maintenance frequency of production facility due to the corrosion and elution of metal in a recovered solvent can be reduced, which in turn decreases the production cost.

Abstract: A multi-stage process for the manufacture of branched aliphatic polyamides is provided. The process comprises the steps, in sequence, of feeding to a reactor a slurry of at least one aliphatic dinitrile, and at least one aliphatic diamine, at least one of which is branched, in the presence of 0.05 to 2% by weight of a phosphorous-containing compound, with the incremental addition of water, heating the slurry to a temperature of at least 270° C. while maintaining a pressure of at least 1.2 Mpa, venting water, ammonia and other volatile matter from the reactor while maintaining the temperature and pressure, maintaining the temperature for a further period of time while reducing the pressure to at least atmospheric pressure and then discharging the polyamide so formed. Polyamides made by this process are substantially the same as corresponding polyamides made by the conventional salt-strike process, and can be used in molding, coating and film applications.

Abstract: A continuous process for the polymerization of omega-aminonitriles (e.g., 6-aminocapronitriles) which is introduced at the top of a vertical multistage reactor being swept countercurrently with steam and polyamide (e.g., nylon 6) is recovered near the bottom of the vertical multistage reactor. By virtue of independent temperature control at each of the vertical stages of the multistage reactor, the polyamide recovered is typically characterized as having unreacted nitrile end groups of less than 20 gram equivalents per million grams of polyamide, and less than 25 gram equivalents of secondary amine branching per million grams of polyamide.

Abstract: A process for preparing a polyamide by reacting at least one aminonitrile with water comprises: (1) reacting at least one aminonitrile with water at a temperature from 100 to 360° C. and a pressure from 0.1 to 35×106 Pa to obtain a reaction mixture, (2) further reacting the reaction mixture at a temperature from 150 to 400° C. and a pressure which is lower than the pressure in step 1, the temperature and the pressure being selected so as to obtain a first gas phase and a first liquid or a first solid phase or a mixture of first solid and first liquid phase, and the first gas phase is separated from the first liquid or the first solid phase or from the mixture of first liquid and first solid phase, and (3) admixing the first liquid or the first solid phase or the mixture of first liquid and first solid phase with a gaseous or liquid phase comprising water at a temperature from 150 to 360° C. and a pressure from 0.1 to 30×106 Pa to obtain a product mixture.

Abstract: Nylon 6 chip is obtainable by hydrolytic polymerization of caprolactam in the presence of dicarboxylic acids as chain regulators, subsequent processing of the polymer melt into chip, extraction of the low molecular weight portions from the chip with water and subsequent drying of the chip.

Abstract: A process for producing a polyamide from dicarboxylic acid monomer and diamine monomer comprises the steps of: (a) mixing molten dicarboxylic acid monomer and molten diamine monomer in equimolar amounts, thereby producing a molten reaction mixture; (b) flowing the reaction mixture through at least one unvented reaction vessel, the residence time of the reaction mixture in the at least one unvented reaction vessel being between about 0.01 minutes and about 30 minutes, thereby forming a first product stream that comprises polyamide and water of polymerization; and (c) flowing the first product stream through at least one vented vessel, whereby water of polymerization is removed, thereby forming a second product stream that comprises polyamide. The process can operate continuously, and there is no need to add water to the dicarboxylic acid, to the diamine, or to the reaction mixture.

Abstract: For producing a polyamide having an unreacted caprolactam content of from 0 to 0.5% by weight and an oligomer content of from 0 to 1.25% by weight and having a relative viscosity in a 0.01 g/ml solution of sulfuric acid at 25° C. of from 2.2 to 8.0, combined is a first step of polymerizing a starting material comprising caprolactam, under atmospheric pressure to prepare a polymerization product having an unreacted caprolactam content of not larger than 25% by weight and an oligomer content falling between 0 and 1.8% by weight, and a second step of heating the polymerization product prepared in the first step, at a temperature T satisfying the following formula (1) and under reduced pressure to thereby remove the unreacted caprolactam and the oligomer from it: Glass transition point of polyamide<T<melting point of polyamide+150° C.

Abstract: A method for producing polybenzazole in the presence of iron(II) ion. The polybenzazole obtained by this method can be formed into a highly strong fiber having a high elastic modulus and a heat resistant film. The method enables economical production of polybenzazole having fine tone and high polymerization degree.

Abstract: A polyamide resin composition comprising 100 parts by weight of a polyamide resin and 0.005 to 1.0 part by weight of at least one compound selected from the group consisting of a metal salt of a fatty acid, a diamide compound and a diester compound. The polyamide resin is obtained by solid phase-polymerizing a polyamide resin prepared by melt-polymerizing a diamine component containing 70 mol % or more of metaxylylenediamine and a dicarboxylic acid component containing 70 mol % or more of adipic acid, and preferably has a relative viscosity of 2.3 to 4.2 when measured at 25.degree. C. using a solution of 1 g polyamide resin in 100 ml of 96% sulfuric acid.

Abstract: The invention relates to a polyamide, a method for its manufacture and compounds containing it. It involves, specifically, a polyamide obtained through polymerization of an aminoacid or lactam such as caprolactam in the presence of a compound having at least three functions capable of generating an amide function by reacting either with an amine function or with an acid fonction. The polyamide obtained in this way has at least part of these molecular chains in a star formation, the other part being in linear form. This polymer is useful, inter alia, in the manufacture of compounds that are to be molded, since it has minimal viscosity in a melted medium while still retaining the mechanical properties of a linear polymer.

Abstract: This invention relates to methods of preparing dibasic acids, such as adipic acid for example, by oxidizing a hydrocarbon with a gas containing an oxidant, preferably oxygen. A respective hydrocarbon is reacted with a gaseous oxidant to form dibasic acid in a mixture which preferably contains a solvent, a catalyst, and an initiator. The temperature of the mixture is then lowered to a point at which solid dibasic acid is precipitated, while maintaining a single liquid phase. At least part of the formed acid is then removed.

Abstract: The invention relates to a polymer prepared from the repeat units of residues of a monomer of at least one dicarboxylic acid or ester; a monomer comprising a diol, diamine or a mixture thereof; a monomer comprising at least one sulfonate group and at least one polyester reactive group, and a monomer comprising an optical brightener agent having at least one polyester reactive group. The invention further relates to a method for preparing a polymer. The invention further relates to method of marking an article or composition with the polymer. The invention further relates to a method for detecting and separating an article contacted with the polymer. The invention further relates to an article or composition contacted with the polymer. The invention further relates to a method for enhancing the optical brightness of an article or composition, by contacting the article or composition with the polymer.

Abstract: This invention relates to high temperature, semi-crystalline, semi-aromatic nylon copolymers with improved shrinkage and blistering resistance, made from terephthalic acid (TA), hexamethylene diamine (HMD) and another aliphatic dicarboxylic acid as monomers. These polymers display superior % TD (Transverse Direction) annealing shrinkage, superior resistance to blistering when formulated with flame retardant additives and reinforcement under infrared (IR) reflow soldering conditions for electronic conectors, as well as a very good balance of mechanical performance as high temperature nylons.

Abstract: A process and device for the standardised continuous production of polyamide 6, polyamide 6.6 and/or copolyamides from e-caprolactam and/or adipic acidic hexamethylenediamine or adipic acid and hexamethylenediamine uses a combination of known specific processes to design a polymerisation reactor in which product with sufficiently high quality can be produced with the most efficient possible use of the energy applied and in such a way that the initial substances can be used alternately in the individual processing stages: pre-heating of the initial products using a common heat exchanger to 190-300.degree. C.; polymerisation of the initial products in a pressure stage with or without elimination of water and product recycling at 150-280.degree. C. and a pressure of <20 bar, dewatering of the polymer melt in a one to five turn coil under slow pressure reduction; and final condensation of the melt in at least one common vertical reactor at temperatures of between 210 and 285.degree. C.

Abstract: The present invention relates to a process for preparing an aromatic polyamide which comprises:(A) a dicarboxylic acid component unit comprising 30 to 100 mol % of a terephthalic acid component unit, and, as required, 0 to 70 mol % of a cyclic dicarboxylic acid component unit other than the terephthalic acid and, as required, 0 to 15 mol % of an aliphatic dicarboxylic acid having 7 to 20 carbon atoms; and(B) a diamine unit comprising 50 to 100 mol % of a component unit derived from an aliphatic alkylene diamine having 4 to 25 carbon atoms, and 0 to 50 mol % of a component unit derived from an alicyclic diamine having 3 to 25 carbon atoms; said process comprising:a step (i) of preparing a solid low-degree condensation product having an intrinsic viscosity [.eta.].sub.1 of from 0.05 to 0.2 dl/g is prepared by the polycondensation reaction of the dicarboxylic acid with the diamine;a step (ii) of solid-phase polymerizing said low-degree condensation product at a temperature of not higher than 195.degree. C.

Abstract: Water soluble polyalkanolamides and a process to prepare same by reacting polycarboxylic acid or its anhydride, ester or halide derivative with at least one alkanolamine and optionally with a polyamine and removing the condensation byproduct water, alcohol or hydrogen halide.

Abstract: The present invention relates to a dispersing agent for pigments or extenders which is obtainable by salt formation from an amine-functional compound by means of an acid,wherein a polyamine which contains at least three amino groups and which is from the group comprising aliphatic linear polyamines and/or aliphatic branched polyamines and/or modified polyamines, with the proviso that after modification three amino groups which can be converted into salts are still present per molecule, or a mixture of polyamines such as these, is used as the amine-functional compound, andwherein a substance from the group comprising phosphoric acid esters of general formula: (HO).sub.3-n PO(OR.sup.1).sub.n where n=1 or 2, sulphonic acids of general formula HOSO.sub.2 R.sup.2 and acidic sulphuric acid esters of general formula HOSO.sub.3 R.sup.2 is used as the acid, wherein R.sup.1 and R.sup.

Abstract: Biodegradable polyesteramides as defined in the specification obtained by reacting a mixture consisting essentially of(a1) from 95 to 99.9% by weight of a polyesteramide,(a2) from 0.1 to 5% by weight of a divinyl ether, and(a3) from 0 to 5 mol % of compound D as defined in the specification, and other biodegradable polymers and thermoplastic molding compositions, processes for the preparation thereof, the use thereof for producing biodegradable moldings, and adhesives, biodegradable moldings obtained from the polymers and molding compositions according to the invention.

Abstract: A method of producing a polyamide resin by reacting with at least one diamine compound, at least one linear polyester resin consisting of at least one dicarboxylic acid component and at least one diol component and having an intrinsic viscosity of not less than 0.2 dl/g, the at least one diamine compound being used in an amount of 0.5-1.5 mol per 1 mol of the at least one linear polyester resin as calculated in the repeating unit thereof, the linear polyester resin and the diamine compound being reacted in a reaction medium comprising at least one solvent selected from aprotic protophobic polar solvents, so that the at least one diol component of the linear polyester resin is substituted by the diamine compound, resulting in the polyamide resin as a reaction product.

Abstract: A succinimide composition is prepared by reacting a mixture of a polyalkenyl derivative, an unsaturated acidic reagent copolymer, and a polyamine under reactive conditions. The polyalkenyl derivative is produced by reacting an unsaturated acidic reagent with a polyalkene in the presence of a strong acid. The unsaturated acidic reagent copolymer is a copolymer of an unsaturated acidic reagent and an olefin.

Abstract: A process and a device for continuous production of polyamides from a monomer starting material consisting (up to 100%) of adipic acid hexamethylene diamine and water are described. The process is characterized by completing of the first step under pressure at temperatures between 180 and 280.degree. C. in a closed reactor, after which the polyamide is subjected to further steps at the start of each of which vaporized water is removed or driven out by an inert gas.