Abstract: For producing a cylindrical surface that has a surface structure of predetermined geometry suitable for application of material by thermal spraying, a geometrically predetermined groove structure of minimal depth and width is introduced into the surface by a tool embodied as a follow-on tool in that a groove cross-section is processed successively to a final size. In order for the surface to be producible in mass production with constant quality, the groove structure is worked in such that first a base groove is introduced with a groove bottom width that is smaller than the groove bottom width of the finished groove. Subsequently, at least one flank of the base groove is processed for producing an undercut groove profile by a non-cutting action or cutting action wherein the introduced groove structure is deformed in such a way that the groove openings are constricted by upsetting deformations of material.

Abstract: For producing a cylindrical surface that has a surface structure of predetermined geometry suitable for application of material by thermal spraying, a geometrically predetermined groove structure of minimal depth and width is introduced into the surface by a tool embodied as a follow-on tool in that a groove cross-section is processed successively to a final size. In order for the surface to be producible in mass production with constant quality, the groove structure is worked in such that first a base groove is introduced with a groove bottom width that is smaller than the groove bottom width of the finished groove. Subsequently, at least one flank of the base groove is processed for producing an undercut groove profile by a non-cutting action or cutting action wherein the introduced groove structure is deformed in such a way that the groove openings are constricted by upsetting deformations of material.

Abstract: For producing a cylindrical surface that has a surface structure of predetermined geometry suitable for application of material by thermal spraying, a geometrically predetermined groove structure of minimal depth and width is introduced into the surface by a tool embodied as a follow-on tool in that a groove cross-section is processed successively to a final size. In order for the surface to be producible in mass production with constant quality, the groove structure is worked in such that first a base groove is introduced with a groove bottom width that is smaller than the groove bottom width of the finished groove. Subsequently, at least one flank of the base groove is processed for producing an undercut groove profile by a non-cutting action or cutting action wherein the introduced groove structure is deformed in such a way that the groove openings are constricted by upsetting deformations of material.

Abstract: For producing a cylindrical surface that has a surface structure of predetermined geometry suitable for application of material by thermal spraying, a geometrically predetermined groove structure of minimal depth and width is introduced into the surface by a tool embodied as a follow-on tool in that a groove cross-section is processed successively to a final size. In order for the surface to be producible in mass production with constant quality, the groove structure is worked in such that first a base groove is introduced with a groove bottom width that is smaller than the groove bottom width of the finished groove. Subsequently, at least one flank of the base groove is processed for producing an undercut groove profile by a non-cutting action or cutting action wherein the introduced groove structure is deformed in such a way that the groove openings are constricted by upsetting deformations of material.

Abstract: For producing a cylindrical surface that has a surface structure of predetermined geometry suitable for application of material by thermal spraying, a geometrically predetermined groove structure of minimal depth and width is introduced into the surface by a tool embodied as a follow-on tool in that a groove cross-section is processed successively to a final size. In order for the surface to be producible in mass production with constant quality, the groove structure is worked in such that first a base groove is introduced with a groove bottom width that is smaller than the groove bottom width of the finished groove. Subsequently, at least one flank of the base groove is processed for producing an undercut groove profile by a non-cutting action or cutting action wherein the introduced groove structure is deformed in such a way that the groove openings are constricted by upsetting deformations of material.

Abstract: Thermoplastic molding materials contain, as essential components,A) 40-95% by weight of a partly aromatic copolyamide having a triamine content of less than 0.5% by weight, consisting essentially ofA.sub.1) 20-90% by weight of units derived from terephthalic acid and hexamethylenediamine,A.sub.2 5-50% by weight of units derived from .epsilon.-caprolactam andA.sub.3) 0-80% by weight of units derived from adipic acid and hexamethylenediamine, andB) 5-60% by weight of fibrous or particulate fillers or mixtures of these.

Abstract: Partly aromatic copolyamides contain as essential componentsA) 40-90% by weight of units derived from terephthalic acid and hexamethylenediamine,B) 0-50% by weight of units derived from .epsilon.-caprolactam andC) 0-60% by weight of units derived from adipic acid and hexamethylenediamine,the components B) and/or C) accounting for a total of not less than 10% by weight of the total units and the copolyamide having a triamine content of less than 0.5% by weight.

Abstract: Thermoplastic molding compositions contain as essential componentsA) 40-95% by weight of a partly aromatic copolyamide composed essentially ofA.sub.1) 20-90% by weight of units derived from terephthalic acid and hexamethylenediamine,A.sub.2) 0-50% by weight of units derived from .epsilon.-caprolactam andA.sub.3) 0-80% by weight of units derived from adipic acid and hexamethylenediamine,B) 5-60% by weight of an impact modifying rubber, and in additionC) 0-50% by weight of fibrous or particulate fillers or mixtures thereof.

Abstract: Partly aromatic copolyamides contain as essential componentsA) 40-90% by weight of units derived from terephthalic acid and hexamethylenediamine,B) 0-50% by weight of units derived from .epsilon.-caprolactam andC) 0-60% by weight of units derived from adipic acid and hexamethylenediamine,the components B) and/or C) accounting for a total of not less than 10% by weight of the total units and the copolyamide having a triamine content of less than 0.5% by weight.

Abstract: Partly aromatic copolyamides contain as essential componentsA) 40-90% by weight of units derived from terephthalic acid and hexamethylenediamine,B) 0-50% by weight of units derived from .epsilon.-caprolactam andC) 0-60% by weight of units derived from adipic acid and hexamethylenediamine,the components B) and/or C) accounting for a total of not less than 10% by weight of the total units and the copolyamide having a triamine content of less than 0.5% by weight.

Abstract: Copolyamides are prepared by a continuous process in which(a) an aqueous solution of salts of equimolar amounts of diamines and dicarboxylic acids is passed, under superatmospheric pressure and with simultaneous evaporation of water, through a tubular precondensation zone with formation of a vapor phase and a prepolymer at above the melting point of the prepolymer,(b) the vapor phase is separated from the prepolymer melt,(c) the vapor phase is separated in a column into steam and an aqueous diamine solution, and the aqueous solution containing diamines is recycled to the polymerization,(d) the prepolymer melt is mixed with molten caprolactam at polyamide-forming temperatures, and(e) the mixture of prepolymer and caprolactam is passed downward through a vertical polymerization tube at polyamide-forming temperatures and a copolyamide is obtained.

Abstract: Impact-resistant nylon molding materials containA a linear, thermoplastic nylon composed of radicals derived from terephthalic acid and isophthalic acid and alkanediamines of 4 to 10 carbon atoms, andB from 5 to 60% by weight, based on A, of one or more copolymers of1. from 50 to 80% by weight of ethylene,from 20 to 50% by weight of a primary or secondary C.sub.2 -C.sub.8 -alkyl ester of (meth)acrylic acid andfrom 0.5 to 10% by weight of a monomer possessing an acidic functional group or a latent acidic functional group, or2. from 70 to 98% by weight of a primary or secondary C.sub.2 -C.sub.8 -alkyl ester of (meth)acrylic acid,from 1 to 30% by weight of a monomer possessing an acidic functional group or a latent acidic functional group, andfrom 1 to 5% by weight of a monomer containing 2 or more olefinic double bonds in the molecule,the percentages stated in 1. and 2. summing to 100% in each case, andC. if required, effective amounts of additives.

Abstract: Thermoplastic molding materials containing, as essential components,(A) 5-95% by weight of a partially aromatic copolyamide essentially composed of(A.sub.1) 20-90% by weight of units derived from terephthalic acid and hexamethylenediamine(A.sub.2) 0-50% by weight of units derived from .epsilon.-caprolactam and(A.sub.3) 0-80% by weight of units derived from adipic acid and hexamethylenediamine,(B) 5-95% by weight of a polyphenylene ether,(C) 0-45% by weight of a vinylaromatic polymer and(D) 0-40% by weight of a rubber impact-modifier, are prepared.

Abstract: Flameproofed thermoplastic molding materials contain(A) 40-99% by weight of a partly aromatic amide copolymer consisting essentially of(a.sub.1) 40-50% by weight of units derived from terephthalic acid and hexamethylenediamine,(a.sub.2) 0-50% by weight of units derived from .epsilon.-caprolactam and(a.sub.3) 0-60% by weight of units derived from adipic acid and hexamethylenediamine,components (a.sub.2) and/or (a.sub.3) accounting altogether for not less than 10% by weight of the total number of units,(B) 1-30% by weight of a flameproofing combination of(b.sub.1) 40-97% by weight of red phosphorus,(b.sub.2) 1-50% by weight of an inorganic compound of a divalent or tetravalent metal,(b.sub.3) 1-40% by weight of an organic mono- or dicarboxylic acid and(b.sub.

Abstract: Thermoplastic molding materials contain(A) from 5 to 95% by weight of a nylon and(B) from 5 to 95% by weight of a copolymer composed of(B.sub.1) from 50 to 99.9% by weight of a styrene of the general formula I ##STR1## where R.sup.1 is alkyl or 1 to 4 carbon atoms or hydrogen, R.sup.2 is alkyl of 1 to 6 carbon atoms or halogen and m is 0, 1, 2 or 3,(B.sub.2) from 0.1 to 30% by weight of a monomer containing epoxide groups (II) ##STR2## or of a monomer containing lactam groups (III) ##STR3## or of a monomer containing halobenzyl groups (IV) ##STR4## where R.sup.3 is a divalent, branched or straight-chain alkyl group of 2 to 15 carbon atoms, R.sup.4 is alkyl of not more than 6 carbon atoms, X is halogen, n is 1, 2 or 3 and r is 0, 1, 2 or 3, and(B.sub.3) from 0 to 48% by weight of further comonomers.

Abstract: Thermoplastic molding materials contain, as essential components,(A) from 40 to 95% by weight of a nylon and(B) from 5 to 60% by weight of a noncrosslinked copolymer based on(a) from 55 to 79.5% by weight of ethylene,(b) from 20 to 40% by weight of one or more primary or secondary C.sub.2 -C.sub.8 -alkyl esters of acrylic acid or methacrylic acid,(c) from 0.49 to 8% by weight of a monomer having an acid functional group or a latent acid functional group, or of an epoxy-containing monomer of an ethylenically unsaturated monocarboxylic acid, and(d) from 0.01 to 2% by weight of an ethylenically unsaturated dicarboxylic acid or of an anhydride of such an acid.

Abstract: High-impact polyamide molding compositions contain as essential components(X) from 40 to 98% by weight, based on (X)+(Y), of a thermoplastic polyamide,(Y) from 2 to 60% by weight, based on (X)+(Y), of a rubberlike polymer which contains, as copolymerized units, an acrylic or methacrylic ester or an unsaturated carboxylic acid,(Z) from 0.001 to 2% by weight, based on (X)+(Y), of a metal compound selected from the group consisting of(Z.sub.1) salts of divalent, trivalent or tetravalent metals with C.sub.2 -C.sub.4 -carboxylic acids,(Z.sub.2) oxides of germanium or antimony and(Z.sub.3) alkyl orthotitanates and dialkyltin dilaurates.

Abstract: Impact-resistant nylon molding materials containA: a linear, thermoplastic nylon composed of radicals derived from terephthalic acid and isophthalic acid and alkanediamines of 4 to 10 carbon atoms, andB: from 50 to 60% by weight, based on A, of one or more copolymers of1. from 50 to 80% by weight of ethylene, from 20 to 50% by weight of a primary or secondary C.sub.2 -C.sub.8 -alkyl ester of (meth)acrylic acid, and from 0.5 to 10% by weight of a monomer possessing an acidic functional group or a latent acidic functional group, or2. from 70 to 98% by weight of a primary or secondary C.sub.2 -C.sub.8 -alkyl ester of (meth)acrylic acid, from 1 to 30% by weight of a monomer possessing an acidic functional group or a latent acidic functional group, and from 1 to 5% by weight of a monomer containing 2 or more olefinic double bonds in the molecule,the percentages stated in 1. and 2. summing to 100% in each case, andC: if required, effective amounts of additives.

Abstract: Nylon granules are based on(A) from 20 to 99.99% by weight of a nylon,(B) from 0 to 60% by weight of fibrous or particulate fillers or a mixture thereof and(C) from 0 to 40% by weight of an impact modifying rubber and contain(D) from 0.01 to 1% by weight of an outer shell consisting of a mixture of(d.sub.1) zinc stearate or aluminum stearate or a mixture thereof,(d.sub.2) calcium stearate and(d.sub.3) an ester of an aliphatic carboxylic acid of 6 to 24 carbon atoms with an aliphatic saturated alcohol of 2 to 24 carbon atoms.

Abstract: Thermoplastic molding materials based on(A) nylons and(B) polycarbonates, and containing 0.1-30% by weight of(C) a polymer containing hydroxyl groups, --OH.The molding materials have good surface characteristics and high impact strength, especially at low temperatures.