Abstract:
PROBLEM TO BE SOLVED: To provide a multilayer composite material having a good quality, especially good layer distribution and wall thickness distribution, without deteriorating the use technical properties of ETFE, such as a fuel-blocking action, when modifying ETFE. SOLUTION: A molding material comprising the following components: (a) 100 pts.mass of a polyamide and (b) 0.005 to 10 pts.mass of a compound having at least two carbonate units, for simultaneously extruding with a molding material based on a highly melting polymer having a crystallite melting point Tm of at least 255°C and/or a glass transition temperature Tg of at least 180°C. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a low-cost tube which satisfies demand imposed on an air brake piping relating to the resistance to chemicals, engine oils, zinc chloride and scattered salt, and which has high burst pressure strength and low-temperature impact resistance. SOLUTION: The tube comprises the following layers: I. an outer layer comprising a molding material including up to at least 40 mass%, up to at least 45 mass%, up to at least 50 mass%, up to at least 55 mass%, or up to at least 60 mass% of a polyamide a monomer unit of which has at least eight, at least nine, or at least ten carbon atoms; II. optionally a layer which comprises an adhesive molding material; and III. a layer which comprises a polypropylene molding material. Advantageously, wherein these layers are directly combined. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an adhesion assistant effective for a multilayered composite capable of keeping the adhesion of layers over a long time in the contact with a reagent at high temp. and capable of being produced inexpensively and simply. SOLUTION: A thermoplastic multilayered composite consists of a layer I comprising a thermoplastic molding material, a layer II comprising other thermoplastic molding material and a layer comprising an adhesion assistant provided between both layers I, II and the adhesion assistant comprises a graft copolymer produced by using at least 5 mass % of (a) polyamine containing at least four nitrogen atoms and having a number average mol.wt. Mn of at least 146 g/mol and 0.5-25 mass % of (b) a polyamide forming monomer selected from a lactam a, ω-aminecarboxylic acid and/or an equimolar combination of a diamine and a dicarboxylic acid.
Abstract:
A pipe, which comprises the following layers: I. an exterior layer composed of a moulding composition which comprises at least 40% by weight of a polyamide whose monomer units contain, on average, at least 8 carbon atoms, III. an intermediate layer composed of a moulding composition which comprises the following components: a) from 70 to 99% by weight of polyamide, selected from PA6, PA66, PA6/66 and mixtures thereof and b) from 1 to 30% by weight of plasticizer, where the moulding composition comprises no impact modifier, and V. an interior layer composed of a moulding composition which comprises at least 40% by weight of a polyamide whose monomer units contain, on average, at least 8 carbon atoms, where a) the exterior diameter of the pipe is in the range from 6 to 20 mm, b) the wall thickness is in the range from 1.0 to 2.0 mm and c) the thickness of the polypropylene layer is from 25 to 75% of the wall thickness, is used as air-brake line which can be produced at low cost and which has high bursting strength and good low-temperature impact resistance.
Abstract:
Pipe comprises layers, which are an outer layer (a) of molded mass containing at least 40 wt.% of a polyamide, whose monomer units in the agent contains 8 carbon atoms and a layer (c) of polypropylene molded mass, where the outer diameter of the pipe is 6-20 mm, wall thickness lies at 1-2 mm and the thickness of the polypropylene molded mass layer amounts to 25-75% of the wall thickness.
Abstract:
The use of moulding materials (I) containing (a) 100 parts by weight (pts. wt.) polyamide and (b) 0.005-10 pts. wt. of a compound (II) with at least two carbonate units, for coextrusion with a moulding material (III) based on a high-melting polymer with a crystallite melting point (Tm) of at least 255 deg C and/or a glass transition point(Tg)of at least 180 deg C. Independent claims are included for (1) a method for the production of multilayer composites by making a polyamide moulding material, mixing this with 0.005-10 pts. wt. (II) per 100 pts. wt. polyamide, optionally storing and/or transporting the mixture and then coextruding it with (III) (2) multilayer composites obtained by this method .
Abstract:
The composite includes a coupling layer comprising a graft copolymer from: (a) a polyamine with at least 4 nitrogen atoms and a number-average molecular weight (Mn) of at least 146; and (b) polyamide-forming monomers (lactams, omega -amino-acids and/or equimol. combinations of diamines and dicarboxylic acids). A thermoplastic multilayer composite comprises layers (I) and (II) of different thermoplastic moulding materials and an interlayer (III) of a coupling agent. At least 5 wt% of (III) consists of a graft copolymer derived from: (a) 0.5-25 wt% (based on the copolymer) of a polyamine with at least 4 nitrogen atoms and a Mn of at least 146; and (b) polyamide-forming monomers selected from lactams, omega -aminocarboxylic acids or equimolar combinations of diamines and dicarboxylic acids. An Independent claim is also included for moulding materials containing: (A) 5-60 parts by weight (pts. wt.) of a graft copolymer as above; (B) 10-85 pts. wt. of a polyamide; (C) 10-85 pts. wt. of a polyester; and (D) not more than 40 wt% (based on A + B + C) of an impact-modifying rubber and/or conventional auxiliary substances or additives.
Abstract:
Pipe comprises layers, which are an outer layer (a) of molded mass containing at least 40 wt.% of a polyamide, whose monomer units in the agent contains 8 carbon atoms and a layer (c) of polypropylene molded mass, where the outer diameter of the pipe is 6-20 mm, wall thickness lies at 1-2 mm and the thickness of the polypropylene molded mass layer amounts to 25-75% of the wall thickness.
Abstract:
The composite includes a coupling layer comprising a graft copolymer from: (a) a polyamine with at least 4 nitrogen atoms and a number-average molecular weight (Mn) of at least 146; and (b) polyamide-forming monomers (lactams, omega -amino-acids and/or equimol. combinations of diamines and dicarboxylic acids). A thermoplastic multilayer composite comprises layers (I) and (II) of different thermoplastic moulding materials and an interlayer (III) of a coupling agent. At least 5 wt% of (III) consists of a graft copolymer derived from: (a) 0.5-25 wt% (based on the copolymer) of a polyamine with at least 4 nitrogen atoms and a Mn of at least 146; and (b) polyamide-forming monomers selected from lactams, omega -aminocarboxylic acids or equimolar combinations of diamines and dicarboxylic acids. An Independent claim is also included for moulding materials containing: (A) 5-60 parts by weight (pts. wt.) of a graft copolymer as above; (B) 10-85 pts. wt. of a polyamide; (C) 10-85 pts. wt. of a polyester; and (D) not more than 40 wt% (based on A + B + C) of an impact-modifying rubber and/or conventional auxiliary substances or additives.