Abstract: A process for producing a composite article made of at least one hard component and at least one soft component, wherein the hard component contains a thermoplastic polyester containing non-aromatic C.dbd.C double bonds, and the soft component contains a vulcanizate, wherein the vulcanizate is produced by vulcanization of a rubber composition having the following components:(i) 100 parts by weight of a rubber containing carboxyl or anhydride groups;(ii) from 0 to 300 parts by weight of fillers;(iii) from 1 to 10 parts by weight of peroxidic vulcanizers;(iv) from 0 to 150 parts by weight of plasticizers, and(v) more than 4 parts by weight of a difunctional or polyfunctional vulcanization activator of the formulaR.sup.1 (--Z--CO--CR.sup.2 .dbd.CR.sup.3 R.sup.4).sub.n,whereinR.sup.1 is a divalent or higher-valent radical or a single bond, R.sup.2 to R.sup.

Abstract: Polyester/elastomer composites are produced by vulcanizing a polyester which contains aliphatic double bonds in the presence of a vulcanizate comprising:I. 100 parts by weight of a rubber,II. 0 to 300 parts by weight of fillers,III. 1 to 10 parts by weight of peroxidic vulcanization agent,IV. 0.5 to 4 parts by weight of vulcanization activators,V. 0 to 150 parts by weight of plasticizer andVI. 0.5 to 10 parts by weight of a silane of the formulaX--R'--Si(OR.sup.2).sub.3wherein X contains an aliphatic double bond or an epoxide group.

Abstract: Process for producing composite articles made of polyesters and elastomers. Composite articles made of a thermoplastic polyester and a vulcanizate are to be produced. These articles are obtained by producing the vulcanizate under conventional vulcanization conditions in contact with the hard component by vulcanization of a rubber composition which contains the following components:I. 100 parts by weight of a rubber,II. From 0 to 300 parts by weight of fillers,III. From 1 to 10 parts by weight of peroxidic vulcanization agents,IV. From 0 to 4 parts by weight of vulcanization activators andV. From 0 to 150 parts by weight of plasticizers, wherea) the hard and/or the soft component, as desired, additionally contains from 0.5 to 12 parts by weight of a difunctional or polyfunctional maleimide andb) in the case of the hard component containing no difunctional or polyfunctional maleimide, the rubber possesses carboxyl or acid anhydride groups.A strong composite is obtained by this process.

Abstract: The invention describes a process for the production of a composite article of at least two component pieces, firmly bonded to one another, of a vulcanized rubber compound on the one hand and a polyamide composition on the other hand, the vulcanized rubber compound being prepared under customary vulcanization conditions in contact with the polyamide composition by vulcanization of a rubber compound which comprises the following components:I. 100 parts by weight of a rubber,II. 0 to 300 parts by weight of fillers,III. 0 to 150 parts by weight of plasticizer,IV. 1 to 10 parts by weight of peroxide vulcanization agent,V. 0 to 4 parts by weight of vulcanization activators andVI. 1 to 10 parts by weight of a silane containing double bonds.

Abstract: Aromatic polyamides with an improved stability toward thermal oxidation was achieved by polycondensation being performed in the presence of 0.05 to 4 mol % of a catalyst comprising a mixture of phosphorus compounds and metal salts.With the process according to the invention, it is possible to obtain aromatic polyamides stable toward thermal oxidation.

Abstract: Hydrolysis-resistant, thermoplastic molding compositions are made from high-molecular weight, linear polybutylene terephthalate and 0.1-10 mole %, based on the amount of the dicarboxylic acid component of the polyester, of a salt of Formula (A)[(-O.sub.3 S).sub.x R--CO.sub.2.sup.-).sub.2 ]M, (A)whereinM is an alkali or alkaline earth metal cation,R is an aromatic or cycloaliphatic residue or an aliphatic residue of 2-20 carbon atoms in the carbon chain, andx is 0 or 1.

Abstract: Improved molding compositions based on high-molecular polyether ester amides are obtained by heating at 180.degree.-250.degree. C. a melt containing a mixture ofA. a polyether ester amide having a relative solution viscosity .eta..sub.rel of at least 1.5; andB. 0.05-1.5 parts by weight, based on 100 parts by weight of the molding composition, of a cyclic, trimerized isophorone diisocyanate or an oligomer thereof having a degree of oligomerization of 2-5 and an isocyanate functionality of 3-7.

Abstract: Improved molding compositions based on high-molecular polyalkylene terephthalates are obtained by heating at 240.degree.-300.degree. C. a melt containing a mixture of(A) a polyalkylene terephthalate having a viscosity number J of at least 50 cm.sup.3 /g, and(B) 0.05-2.5 parts by weight, based on 100 parts by weight of the molding composition of a cyclic, trimerized isophorone diisocyanate or an oligomer thereof with a degree of oligomerization of 2-5 with an isocyanate functionality of 3-7.

Abstract: A process for the post condensation of poly(alkylene terephthalate) in the solid phase is carried out in the presence of esters of phosphorous acid at 25.degree.-65.degree. C. below the melting point of the poly(alkylene terephthalate) while passing an inert gas stream through the reaction mixture.

Abstract: A process for condensing a linear polyalkylene terephthalate having a viscosity number of at least 60 cc/g in two stages, at an elevated temperature, in the solid phase, and in the presence of an alkanediol, comprises, in a first stage, treating the polyalkylene terephthalate in an inert gas stream at a reaction temperature 30.degree.-80.degree. C. below its melting point, with 0.2-3.5% by weight, based on the weight of the polyalkylene terephthalate, of an alkanediol whose boiling point under normal pressure is 20.degree.-70.degree. C. above the reaction temperature, wherein the amount of inert gas passed through per hour, measured under standard conditions, corresponds to 0.3 to 2 times the gross reactor volume; and, in a second stage, condensing the polyalkylene terephthalate in an inert gas stream at a temperature 5.degree.-25.degree. C. below its melting point, wherein the amount of inert gas passed through per hour, measured under standard conditions, corresponds to 2.

Abstract: A process for the regeneration and further condensation of a linear polyalkylene terephthalate, which is inactive due to recondensation treatment in the solid phase, and which has a viscosity number of at least 60 cc/g, the process being conducted in two stages, at an elevated temperature, in the presence of an alkanediol, comprises, in a first stage, treating the inactive polyalkylene terephthalate at a reaction temperature of 30.degree.-80.degree. C. below its melting point, with 0.3-3.5% by weight, based on the weight of the polyalkylene terephthalate, of an alkanediol whose boiling point under normal pressure is 20.degree.-70.degree. C. above the reaction temperature, in an inert gas stream, wherein the amount of inert gas passed through per hour, measured under standard conditions, corresponds to 0.3-2 times the gross reactor volume; and, in a second stage, condensing the polyalkylene terephthalate at a temperature of 5.degree.-25.degree. C.