Abstract: This invention relates to reinforced tire utilizing polyurea or polyurethane formulations having low hysteresis. The polymer having low hysteresis is formed by reacting a prepolymer of an aromatic isocyanate and a high molecular weight difunctional polyol with a chain extender mix comprising an aromatic diamine and difunctional polyol. In these compositions the aromatic diisocyanate and aromatic diamine are selected so that there is substantial symmetry between the molecules. The reinforcement used is preferably an aromatic polyamide.

Abstract: This invention pertains to the synthesis of polyurethane systems having low hysteresis. The systems are generated by reacting a prepolymer of a mononuclear diisocyanate and a polyol with a chain extender mix of a mononuclear aromatic diamine and a polyol. The prepolymer should have a free isocyanate content of from 2 to about 12% by weight and the chain extender mix should have an amine to polyol equivalent from about 0.5 to 5:1.

Abstract: Object of the invention are new diisatoic acid and triisatoic acid derivatives of the general formula I ##STR1## wherein n represents 2 or 3, X stands for oxygen or sulfur and R for a group of the general formula IIY--Z--B].sub.m, (II)in which m stands for 1 or 2, Y for B when m is 1 and Y further represents a di- or trivalent alkyl group with 1 to 5 carbon atoms when m is 2, B represents alkylene with 1 to 4 carbon atoms and Z stands for phenylene-1,4-dioxy or diphenylene-4,4'-dioxy optionally singly or multiply substituted by Cl, NO.sub.2 or alkyl or for a 5- to 7-membered heterocyclic ring which is optionally substituted by one or more of said substituents and has one or more atoms selected from the group consisting of N, S and O as members of the ring, with a benzene nucleus optionally being annulated to said ring, and a process for the production of these compounds which is characterized in that a compound of the general formula IIIR--XH).sub.

Abstract: Polyurea polymer compositions produced by reaction of isocyanates with compounds having terminal amino groups, said compounds being of the formula ##STR1## wherein z is 2 or 3, X is oxygen or sulfur and R stands for a z-valent group of the formula ##STR2## wherein k is 1 or 2, A is alkylidene or alkylated or non-alkylated vinylene, Y is B when k=1 and z=2; when k=2 and z=2; then Y is --CH.sub.2 --; when k=2 and z=3, then Y is ##STR3## and B in each case represents a divalent polyalkylene ether group or a polyalkylene thioether group such as is obtained by removal of the hydroxyl or mercapto groups from a polyalkylene ether diol or a polyalkylene thioether diol of a molecular weight of 100 to 15000. The polymer compositions are useful for the formation of vehicle tires of all types and for the formation of portions of vehicle wheels, for belts, fasteners and shoe soles.

Abstract: Polyurea polymer compositions produced by the isocyanate polyaddition process by reacting compounds having terminal groups and represented by the general formula: ##STR1## wherein z is an integer of 2 to 4, X is oxygen or sulfur and R is a group of the formula:-Y-[Ar-B].sub.kwherein k is an integer of 1 to 4, Ar is an aromatic group, Y is B when k is 1 and when k is 2, then Y is an alkylidene group having 1 to 5 carbon atoms and B represents a divalent polyalkylene ether group or polyalkylene thioether group such as is obtained by the removal of the hydroxyl or mercapto groups from a polyalkylene ether diol or a polyalkylene thioether diol of a molecular weight of about 100 to 15000, with a polyisocyanate. The polymer compositions are useful for the formation of vehicle tires of all types and for the formation of portions of vehicle wheels, for belts, fasteners and shoe soles.

Abstract: New polyurea polymer compositions are disclosed which are prepared by a polyaddition reaction of a polyisocyanate with a compound having the general formula: ##STR1## wherein X is oxygen or sulfur and R represents a group of the formula: ##STR2## wherein R.sub.1 to R.sub.4 are hydrogen or halogen and B stands for a divalent polyalkylene ether group or a polyalkylene thioether group such as it is obtained by removal of the hydroxyl or mercapto groups from a polyalkylene ether diol or from a polyalkylene thioether dithiol of a molecular weight of 100 to 15000. The polymer composition are useful for the formation of vehicle tires of all types including plastic components for parts of wheels, for conveyor belts, fasteners and shoe soles.

Abstract: The invention relates to novel poly(thio)ethers having terminal amino groups, a process for their production and their application in the production of polyureas showing increased thermal stability and improved tensile and structural strength.

Abstract: Poly(thio) ethers having terminal amino groups, said ethers having the formula: ##STR1## wherein X is oxygen or sulfur and R stands for a group of the formula ##STR2## wherein R.sub.1 to R.sub.4 represent hydrogen or halogen and B stands for a divalent polyalkylene ether group or a polyalkylene thioether group or mixtures thereof such as is obtained by removal of the hydroxyl or mercapto groups from a polyalkylene ether diol or a polyalkylene thioether dithiol of a molecular weight of 100 to 15000. A process for the production and application is also disclosed. These ethers are used in the production of poly ureas having increased thermal stability and improved tensile and structural strength.

Abstract: Compounds having terminal amino groups and being of the general formula ##STR1## wherein z is an integer of 2 to 4, X is oxygen or sulfur and R is a group of the formula--Y--[Ar--B].sub.k (II)wherein k is an integer of 1 to 4,Ar is aromatic,When k = 1, Y is B and when k = 2 to 4 then Y is an akylidene group having 1 to 5 carbon atoms,B represents divalent polyalkylene ether or polyalkylene thioether such as it is obtained by removal of the hydroxyl or mercapto groups from a polyalkylene ether diol or a polyalkylene thioether dithiol of a molecular weight of about 100 to 15000. The compounds are useful to prepare polyureas.

Abstract: The invention concerns a new process for the manufacture of 3-substituted thiomethyl-7-amino-3-cephem-4-carboxylic acid compounds which comprises reacting a 3-y-methyl-7-amino-3-cephem-4-carboxylic acid compound, in which Y is hydroxy or esterified hydroxy, with a mercaptane compound, if necessary, in the presence of an optionally protonic Lewis acid, particularly trifluoroacetic acid.