Abstract: The present invention is directed to continuous fiber-reinforced composites having a matrix of modified PVDF. The composite may be a semifinished product or a product or finished part manufactured therefrom. A product according to the invention is pelletized long-fiber material, while a finished part according to the invention is especially a thermoplastic composite pipe.

Abstract: A process for producing a thermoplastic composite pipe, where the process includes: a) providing a tubular liner having a wall containing a thermoplastic polymer A in the region of the outer surface; b) providing a tape containing reinforcing fibres in a matrix containing a thermoplastic polymer B, where polymer A and polymer B are different; c) applying a film or a composite which is produced in d) and is composed of a film and a tape provided in step b) to the tubular liner, with melting of the outer surface of the liner and of the contact surface of the film either beforehand, simultaneously or thereafter, d) applying the tape provided in b) to the outer surface of the film, with melting of the outer surface of the film applied and of the contact surface of the tape either beforehand, simultaneously or thereafter, where the surface of the film which is brought into contact with the liner contains a moulding compound containing polymer A to an extent of at least 30% by weight, and the opposite surface of

Abstract: A pipe, the inner surface of which is lined with a thermoplastic layer, is produced by a process comprising the following steps: a) a metal pipe is provided, b) a tubular inliner composed of a thermoplastic material is provided, c) a tape is cohesively helically bonded to the inliner, wherein the region of the contact surface of the tape consists of a moulding composition or an adhesive which adhere firmly to the surface of the inliner, and wherein the region of the opposing surface of the tape consists of a moulding composition or an adhesive which adhere firmly to the metal of the pipe, wherein the tape contains unidirectional reinforcing fibers; d) the cross section of the inliner is optionally reduced by exposure to an external force, e) the inliner is inserted into the metal pipe, f) by means of contact pressure and optionally heat, the inliner and metal pipe are firmly bonded to each other.

Abstract: A process for producing a thermoplastic composite pipe, where the process includes: a) providing a tubular liner having a wall containing a thermoplastic polymer A in the region of the outer surface; b) providing a tape containing reinforcing fibres in a matrix containing a thermoplastic polymer B, where polymer A and polymer B are different; c) applying a film or a composite which is produced in d) and is composed of a film and a tape provided in step b) to the tubular liner, with melting of the outer surface of the liner and of the contact surface of the film either beforehand, simultaneously or thereafter, d) applying the tape provided in b) to the outer surface of the film, with melting of the outer surface of the film applied and of the contact surface of the tape either beforehand, simultaneously or thereafter, where the surface of the film which is brought into contact with the liner contains a moulding compound containing polymer A to an extent of at least 30% by weight, and the opposite surface of

Abstract: A process for producing a thermoplastic composite pipe is provided. The thermoplastic composite pipe thus produced contains a liner, two or more composite layers composed of tape laminas, and a single- or multilayer intermediate lamina arranged between different composite layers. Composite formation between identical polymers in the process achieves improved adhesion. The thermoplastic composite pipe is especially suitable for offshore applications in oil or gas production.

Abstract: A pipe, the inner surface of which is lined with a thermoplastic layer, is produced by a process comprising the following steps: a) a metal pipe is provided, b) a tubular inliner composed of a thermoplastic material is provided, c) a tape is cohesively helically bonded to the inliner, wherein the region of the contact surface of the tape consists of a moulding composition or an adhesive which adhere firmly to the surface of the inliner, and wherein the region of the opposing surface of the tape consists of a moulding composition or an adhesive which adhere firmly to the metal of the pipe, wherein the tape contains unidirectional reinforcing fibers; d) the cross section of the inliner is optionally reduced by exposure to an external force, e) the inliner is inserted into the metal pipe, f) by means of contact pressure and optionally heat, the inliner and metal pipe are firmly bonded to each other.

Abstract: A process for producing a thermoplastic composite pipe is provided. The thermoplastic composite pipe thus produced contains a liner, two or more composite layers composed of tape laminas, and a single- or multilayer intermediate lamina arranged between different composite layers. Composite formation between identical polymers in the process achieves improved adhesion. The thermoplastic composite pipe is especially suitable for offshore applications in oil or gas production.

Abstract: A process for producing a thermoplastic composite pipe, where the process includes: a) providing a tubular liner having a wall containing a thermoplastic polymer A in the region of the outer surface; b) providing a tape containing reinforcing fibres in a matrix containing a thermoplastic polymer B, where polymer A and polymer B are different; c) applying a film or a composite which is produced in d) and is composed of a film and a tape provided in step b) to the tubular liner, with melting of the outer surface of the liner and of the contact surface of the film either beforehand, simultaneously or thereafter, d) applying the tape provided in b) to the outer surface of the film, with melting of the outer surface of the film applied and of the contact surface of the tape either beforehand, simultaneously or thereafter, where the surface of the film which is brought into contact with the liner contains a moulding compound containing polymer A to an extent of at least 30% by weight, and the opposite surface of

Abstract: A metallic pipe for contact with a hydrolyzing medium provides longer operating times and improved high temperature resistance. The pipe contains a layer of a polyamide moulding composition containing at least 50% by weight of polyamide content containing: I) 60 to 98 parts by weight of a polyamide which contains 10 to 70 meq/kg of a terminal carboxy group and has a relative solution viscosity ?rel of at least 1.90, and II) 2 to 40 parts by weight of a polyamine-polyamide graft copolymer produced from: a) 0.5 to 25% by weight, based on the entire monomer mixture, of a polyamine having at least 4 nitrogen atoms, and b) 75 to 99.5% by weight, based on the entire monomer mixture, of polyamide-forming monomers selected from lactams, ?-aminocarboxylic acids and/or equimolar combinations of diamine and dicarboxylic acid, with the proviso that the amino group concentration of the graft copolymer is in the range from 100 to 2500 meq/kg, wherein the sum of the parts by weight of I) and II) is 100.

Abstract: A metallic pipe for contact with a hydrolyzing medium provides longer operating times and improved high temperature resistance. The pipe contains a layer of a polyamide moulding composition containing at least 50% by weight of polyamide content containing: I) 60 to 98 parts by weight of a polyamide which contains 10 to 70 meq/kg of a terminal carboxy group and has a relative solution viscosity ?rel of at least 1.90, and II) 2 to 40 parts by weight of a polyamine-polyamide graft copolymer produced from: a) 0.5 to 25% by weight, based on the entire monomer mixture, of a polyamine having at least 4 nitrogen atoms, and b) 75 to 99.5% by weight, based on the entire monomer mixture, of polyamide-forming monomers selected from lactams, ?-aminocarboxylic acids and/or equimolar combinations of diamine and dicarboxylic acid, with the proviso that the amino group concentration of the graft copolymer is in the range from 100 to 2500 meq/kg, wherein the sum of the parts by weight of I) and II) is 100.

Abstract: An aromatic polyamide molding compound, comprising:I. an aromatic polyamide having the basic structure ##STR1## where Ar is an aromatic radical without amine-reactive functional groups n is a number between 5 and 500; X represents --SO.sub.2 -- or --CO--, andY represents --O-- or --S--; andII. an aromatic liquid crystalline thermoplastic.

Abstract: 1. A polyamide molding compound, comprised of:(I) an aromatic polyamide having the structure ##STR1## where n is a number between 5 and 500; X represents --SO.sub.2 -- or --CO--, andY represents --O-- or --S--; and (II) an amorphous polyamide.

Abstract: Molding compounds based on polyphenylene ethers, which are distinguished by reduced combustibility and good processing properties. The molding masses contain (A) 100 parts by weight polyphenylene ether, (B) 1 to 40 parts by weight of a dibenzyl toluene and, relative to the total weight of the molding compound, (C) 0 to 30% reinforcing material, and (D) 0 to 5% additives. The molding compounds are used for the production of technical articles such as pipes, plates and housings.

Abstract: The sharpness profile of the working surface of a grinding wheel is determined in the course of a dressing operation by controlling the velocity of movement of the point of contact between the dressing tool and the grinding wheel. The velocity of such movement can be varied by changing the velocity of movement of the grinding wheel in a direction at right angles to its axis and/or by changing the velocity of movement of the dressing tool in a direction which is parallel to the axis of the grinding wheel. The velocity of the point of contact is varied as a function of changes of the inclination of various sections of the working surface relative to the axis of the grinding wheel. This influences the depth of notches or grooves which are formed by a rounded portion of the dressing tool in the working surface of the grinding wheel. The depth of such notches determines the sharpness of the corresponding sections of the working surface.

Abstract: A flat sealing gasket includes an opening defined by a gasket edge and a sheet metal armor framing the gasket edge. The armor at least partially encloses an annular space which is situated radially inwardly of the gasket edge and is generally concentric with the gasket opening. Further, a graphite filling is accommodated in the annular space.

Abstract: A cylinder head gasket for use in an internal combustion engine having a cylinder head accommodating a precombustion chamber block having a bottom face, one part of which is adapted to engage the cylinder head gasket. The cylinder head gasket has an opening adapted to be aligned with a combustion chamber of the internal combustin engine. There is provided a space in the cylinder head gasket adjacent the opening of the cylinder head gasket. The space is adapted to be in alignment with the bottom face of the precombustion chamber block and is occupied at least in part by a component of a high-temperature resistant material.

Abstract: A soft gasket material comprising an asbestos-free fiber material containing fibers and an organic binder, the soft gasket material being comprised of a fiber sheet containing at least three different intermixed types of fibers, namely (a) natural organic fibers, (b) synthetic organic fibers, and (c) at least one fiber type selected from mineral fibers and metal fibers, and being additionally comprised of powdered to finely fibrous fillers and at least one organic binder.

Abstract: A spray powder for the production of wear resistant coatings on the bearing and friction faces of machine parts subjected to sliding friction, comprising 20 to 60 weight percent molybdenum, 25 to 50 weight percent molybdenum carbide and up to 30 weight percent of a low melting point alloy.

Abstract: A flat sealing gasket, such as a cylinder head gasket, for an internal combustion engine, has at least one opening, a cross-sectionally generally U-shaped armor framing the opening. The armor has legs straddling marginal edge zones of the gasket defining the opening. Each armor leg has an inner face in engagement with the gasket and an outer face oriented away from the gasket. A low-friction coating is provided on the outer face of at least one of the armor legs. Those sealing faces of the gasket which are externally of the armor are substantially free from the low-friction coating.

Abstract: Stabilized cosmetic compositions containing as an active ingredient a compound represented by the formula ##STR1## wherein R is sodium, potassium or ammonium and x is 1 or R is aluminum and x is 3. The compounds of the above formula are stabilized in said compositions particularly against degradation due to light by the addition thereto of an effective amount of N-acetylcysteine.