Abstract: Cyclohexylamine is produced by the catalytic hydrogenation of aniline. In contact with a ruthenium catalyst and in the presence of from about one to about 8 parts by weight of ammonia, aniline is hydrogenated under an absolute pressure of from about 2 to about 5 MPa at a temperature of from about 160.degree. to about 180.degree. C. High yields and a minimum of byproducts result. The catalyst can be recycled.

Abstract: Vulcanizable rubber compositions inhibited from premature vulcanization by 2-(thioamino)-4,6-diamino-1,3,5-triazines are described.

Abstract: Vulcanizable rubber compositions inhibited from premature vulcanization by 2-(thioamino)-4,6-diamino-1,3,5-triazines are described.

Abstract: N,N'-Bis(1-cyclohexyl-1-ethyl)-p-phenylenediamine is disclosed as a novel compound, useful as an antidegradant for organic materials, such as rubber. Vulcanized or vulcanizable rubber compounds containing minor amounts of this compound show excellent resistance to ozone attack, under static or dynamic exposure.

Abstract: Forming nitrodiarylamines by gradually admixing, at condensation temperature for forming a nitrodiarylamine, to a mixture of the formyl derivative of an aromatic amine and a nitrohalobenzene, eitherA. aqueous potassium carbonate, orB. aqueous potassium hydroxide and a member of the group consisting of potassium carbonate, tri-potassium phosphate, sodium tetraborate and potassium tetraborate and mixtures thereof, and concurrently removing water.

Abstract: Promoting the reaction of sodium salts of formyl derivatives of aromatic amines by compounds of potassium, cesium or rubidium to form nitrodiarylamines is disclosed.

Abstract: Preparation of a nitrodiarylamine from a nitrohaloarene and alkali metal salt of the formyl derivative of a primary aromatic amine is disclosed.

Abstract: Vulcanizable or vulcanized diene elastomers containing stabilizing amounts of certain bis-alkylaminophenoxyalkyl antidegradants show resistance to ozone attack. A novel class of bis-alkylaminophenoxyalkane compounds is also disclosed.

Abstract: Use of alkali metal salts of the formyl derivatives of aromatic amines to initiate the formation of formamides from carbon monoxide and amines and conversion of the products to nitrodiarylamine are disclosed.

Abstract: A method of inhibiting polymerization of unsaturated carboxylic acid esters and improved unsaturated carboxylic acid ester compositions are described. The method comprises, and the compositions are prepared by, incorporating into the ester composition a combination comprising polyalkyleneamine and arylenediamine of the formula ##STR1## in which X is hydrogen, chloro, trichloromethyl, trifluoromethyl, nitro, lower alkyl, lower alkoxy or phenoxy, R is hydrogen or alkyl, and R.sub.1 is alkyl or phenyl or R and R.sub.1 together with the nitrogen atom is a heterocycle selected from the group consisting of pyrrolidinyl, 2,5-dimethyl pyrrolidinyl, piperidino and hexahydro-1H-azepin-1-yl.