Abstract: Multilayer plastic pipes comprising a polyamide-based inner and outer layer, wherein the inner and outer layer are connected force-lockingly by means of at least one intermediate layer made of a mixture of a linear crystalline polyester and a polyamide, have improved stability to chemical agents and improved mechanical properties.

Abstract: Multilayer plastic pipe comprising at least one outer layer based on polyamide and at least one layer of a linear, crystalline polyester modified by means of an isocyanate mixture exhibits improved resistance, inter alia, to methanol-containing fuels and improved mechanical properties.

Abstract: A multilayer plastic pipe having improved barrier action against diffusion of the substance being transported, particularly methanol-containing fuels, dimensional stability, and resistance to mechanical stress, is provided comprising:an inner layer and an outer layer, each of which comprise a polyamide-based molding composition, wherein the inner layer and outer layer may be the same or different, andat least one intermediate layer comprising a linear, crystalline polyester-based molding composition interposed between and bonding together the inner and outer layers.

Abstract: A multilayer plastic pipe having improved barrier action against diffusion of the substance being transported, particularly methanol-containing fuels, dimensional stability, resistance to mechanical stress, and particularly improved adhesion between layers is provided comprising:(A) an inner layer and an outer layer, each of which comprise a polyamide-based molding composition, wherein the inner layer and outer layer may be the same or different, and (B) at least one intermediate layer comprisinga) 95 to 60% by weight of a linear, crystalline polyester andb) 5 to 40% by weight of a polymer containing reactive groups other than epoxide groups,wherein the reactive groups are contained in a concentration of from 4 to 95 mmol/kg based on the total amount of component (B); and wherein the layers are intimately bonded to one another.

Abstract: A multilayer composite having improved chemical resistance and improved intimate holding between layers is provided comprising(A) a layer of a polyamide-based molding composition having a specified level of amino end groups, and(B) a molding composition comprising a blend of a linear crystalline polyester and a polymer having a specified level of reactive end groups other than epoxide groups.

Abstract: A molding composition is provided which is effective as an agent for imparting compatibility in thermoplastic blends or as an adhesion-promoting layer in composite materials which comprises:A. a polyamideB. a polyester, andC. an oxazoline derivative.

Abstract: Laminates having improved resistance to chemicals and improved frictional bonding between the layers are to be provided.This is achieved byI. a layer of a molding composition based on polyamidecombined withII. a layer of a molding composition based on a modified polyester.Laminates having the desired improved property profile can be obtained by means of the invention.

Abstract: The present invention relates to a multilayer composite having improved chemical resistance and improved intimate bonding between layers comprising (A) a layer of a polyamide molding composition, and (B) a molding composition comprising a linear crystalline polyester and an epoxide containing compound.

Abstract: A plastic pipe having improved resistance to methanol-containing fuels and improved mechanical properties is provided. This is achieved by a multilayer plastic pipe consisting of at least one outer layer based on polyamide and at least one layer of a linear, crystalline polyester modified with isocyanates. With the aid of the invention it is possible to obtain plastic pipes having improved barrier properties against methanol-containing fuels and dimensional stability and mechanical load-bearing capacity.

Abstract: Multilayer thermoplastic composites comprising (a) a layer comprising a polyamide molding composition, (b) a layer comprising a polyester molding composition, and (c) an adhesion promoter intermediate layer (a) and layer (c) find use as structural components in the electrical engineering, machine production and automotive industries, and for foodstuff packaging films or multilayer pipes.

Abstract: A thermoplastic moulding material is prepared by the admixture ofa) 3 to 80 parts by weight of polyphenylene ethers,b) 20 to 97 parts by weight of polyamides,c) 0.1 to 10 parts by weight of carbonates of the general formula ##STR1## in which X and Y independently of one another denote an alkyl, cycloalkyl, aryl or substituted aryl radical, each having up to 12 C atoms,d) 0 to 30 parts by weight of impact modifiers ande) 0 to 75 parts by weight of further polymers, if necessary.

Abstract: Thermoplastic molding compounds are prepared from a functionalized polyphenylene ether and a polyamide. The polyphenylene ether is functionalized by the incorporation of a small quantity of a functionalized phenol monomer.