Abstract: The present invention relates to a process for the preparation of a p-aminodiphenylamine comprising reacting N-phenylquinoneimine of the formula: ##STR1## with ammonia, ammonium hydroxide or mixtures thereof, wherein the molar ratio of N-phenylquinoneimine to NH.sub.3 in the reaction mixture ranges from about 1:1 to 1:80.

Abstract: This invention relates to a novel class of polymeric compositions which have molecular weights ranging from 300 to 3000 and are the reaction product of (a) an alkyl or cycloalkyl substituted diphenyldiamine and (b) a conjugated or nonconjugated diene. The polymeric diphenyldiamine compounds are particularly useful as an antiozonant in diene containing polymers.

Abstract: The present invention relates to vulcanizable rubber compositions containing a methylene donor and a hydroxy-aryl substituted monomaleimide. The substituted monomaleimides may be used as a replacement for resorcinol and function as a methylene acceptor. The vulcanizable rubber compositions exhibit improved rubber/reinforcement interaction for increased adhesion and tear in rubber. These vulcanizable rubber compositions also contain a vulcanizing agent.

Abstract: The present invention relates to alkyl (C.sub.6 -C.sub.22) amides of rosin acids which are useful as a total or partial replacement for extender or processing oil in rubber formulations. Addition of the alkyl (C.sub.6 -C.sub.22) amides of rosin acid also significantly reduce rheometer t25 and t90 values.

Abstract: The present invention relates to alkyl (C.sub.12 -C.sub.22) esters of rosin acids which are useful as a total or partial replacement for extender or processing oil in rubber formulations. Addition of the alkyl (C.sub.12 -C.sub.22) esters of rosin acid improve the tear of the vulcanizate.

Abstract: The present invention relates to the preparation of the p-hydroxydiphenylamine ester of rosin acid. The process involves first reacting hydroquinone and aniline in the presence of a bentonite catalyst to form a reaction mixture containing p-hydroxydiphenylamine. To this reaction mixture is added rosin acid under esterification conditions to form the p-hydroxydiphenylamine ester.

Abstract: The present invention relates to a process for the preparation of epoxidized synthetic cis-1,4-polyisoprene. The process involves reacting the synthetic cis-1,4-polyisoprene in a C.sub.5 -C.sub.7 aliphatic hydrocarbon with tertiary butyl hydroperoxide in the presence of a molybdenum catalyst at a reaction temperature ranging from about 20.degree. C. to about 100.degree. C. The molybdenum catalyst is prepared by reacting together under a N.sub.2 atmosphere molybdenum pentachloride with a carboxylic acid of the formula:CH.sub.3 (CH.sub.2).sub.n COOHwherein n is an integer ranging from 8 to 28. The molar ratio of molybdenum pentachloride to the carboxylic acid ranges from about 1:1 to 1:3.

Abstract: The present invention relates to a process for improving the modulus of a rubber without sacrificing other properties. By utilizing the process of this invention, rubber compositions having increased modulus are prepared by the formation of polypropylene fibrils randomly dispersed throughout the rubber matrix. The present invention includes (1) forming a blend of (a) a polymer alloy containing polypropylene and (b) an unvulcanized rubber stock wherein said polypropylene is present in said blend in an amount ranging from about 5 phr to about 25 phr; and (2) vulcanizing the rubber stock in said blend after orienting said polypropylene by the application of heat and flowing said blend within a mold cavity.

Abstract: There is disclosed the use of matrix-antidegradants in rubber and a process for the production of matrix-antidegradants. More specifically, this invention is directed to microparticles of vulcanized rubber containing high levels of para-phenylenediamine type antiozonants which have a particle diameter of 100 microns or less. The matrix-antidegradant or microparticles prepared according to this invention provide long term protection to rubber articles that are subject to ozone and oxygen attack.

Abstract: The present invention relates to the use of a mixture of alkyl (C.sub.6 -C.sub.18) esters of rosin acids which are useful as a total or partial replacement for conventional waxes and diamine antidegradants in rubber formulations. Addition of the mixture of alkyl (C.sub.6 -C.sub.18) esters of rosin acid improve the weathering resistance of cured rubber compositions.

Abstract: The present invention relates to a modified asphalt cement containing from about 90 to about 99 parts by dry weight of an asphalt cement and from about 1 to about 10 parts by dry weight of a rubber latex having a weight average molecular weight of less than 250,000 and a Mooney viscosity ranging from about 4 to 17. The latex is a random polymer comprising from about 65 to about 85 weight percent of at least one C.sub.4 -C.sub.6 conjugated diolefin and from about 15 to about 35 weight percent of styrene. The latex polymer is highly compatible with the asphalt cement without sacrificing many of the other desirable physical properties.

Abstract: There is disclosed an improved method for open steam curing of mineral-loaded elastomers. It has been discovered that use of a vulcanization agent comprising a mixture of an alkyl phenol disulfide and a guanidine compound provides a synergistic curing system that is superior over the use of either component alone. The improved curing system of the present invention is particularly suited for the open steam curing of mineral-loaded chlorobutyl compounds. The cure system may be used in addition to zinc oxide and results in excellent states of cure as determined by tensile elongation and hardness measurements.

Abstract: The present invention relates to amide linked rosin acid derivatives which are useful as a total or partial replacement for extender or processing oil in rubber formulations. The amide linked rosin acid derivatives improve Strebler adhesion in rubber compositions and also significantly reduce rheometer t25 and t90 values. The amide linked rosin acids are prepared by reacting abietylamine or dehydroabietylamine with abietic acid or dehydroabietic acid under amidation conditions.

Abstract: The present invention relates to a hydroformylated thermal oil which is useful as a total or partial replacement for extender or processing oil in rubber formulations. The hydroformylated thermal oil is prepared by reacting decarboxylated rosin acid with carbon monoxide and hydrogen under hydroformylation conditions in the presence of a hydroformylation catalyst and organic reaction solvent.

Abstract: The present invention relates to a process for synthesizing N-chlorothio-sulfonamides of the formula: ##STR1## comprising reacting a N,N'-dithiobis(sulfonamide) of the formula: ##STR2## with chlorine gas or sulfuryl chloride in the presence of a liquid solvent comprising a N-chlorothio-sulfonamide of formula I, wherein R.sup.1 and R.sup.2 are independently selected from the group consisting of alkyl radicals having from about 1 to about 20 carbon atoms, aralkyl radicals having 7 to 20 carbon atoms, cycloalkyl radicals having from about 5 to about 20 carbon atoms, phenyl radicals, alkaryl radicals having from about 7 to 20 carbon atoms, and haloaryl radicals having about 6 to about 10 carbon atoms and where R.sup.1 is also selected from radicals having the formula: ##STR3## wherein R.sup.3 and R.sup.4 are individually selected from said alkyl, aralkyl, cycloalkyl, phenyl, alkaryl and haloaryl radicals and wherein R.sup.3 and R.sup.4 can be joined together to represent radicals selected from --CH.sub.2).sub.

Abstract: The present invention relates to an improved process for the thermal dimerization of isoprene. In particular, the present process involves heating isoprene at a temperature of from about 110.degree. C. to about 250.degree. C. in the presence of dinitrocresol. The present process is characterized by reduced amounts of polymer product and increased yields of isoprene dimer.

Abstract: The present invention relates to a process for the preparation of a N-substituted phenylenediamine of the formula: ##STR1## comprising reacting N-phenylquinoneimine of the formula: ##STR2## with a primary amine of the formula:R--NH.sub.2 (III),wherein the molar ratio of II to III in the reaction mixture ranges from about 1:1 to 1:10; and wherein R is selected from the group of radicals consisting of alkyls having 1 to 20 carbon atoms, cycloalkyls having 6 to 8 carbon atoms and radicals of the structural formula: ##STR3## wherein R.sup.2 may be the same or different and is independently selected from the group of radicals consisting of hydrogen and an alkyl having 1 carbon atom, R.sup.3 is selected from the group of radicals consisting of an alkyl having 1 to 12 carbon atoms and n is an integer of from 0 to 6. The present process is characterized by its excellent yields of high purity N-substituted phenylenediamines.

Abstract: The present invention relates to a process for reducing the concentration of acrylontrile in an aqueous-acrylonitrile vapor stream. The process involves feeding the aqueous-acrylontrile vapor stream to a primary condenser maintained at a temperature and pressure so that a substantial amount of the water is condensed and the acrylonitrile is maintained in the vapor phase. The vapor containing the acrylonitrile from the first condenser is introduced to a secondary condenser maintained at a temperature and pressure so that substantially all the vapor is condensed. The condensate exiting the secondary condenser is introduced to a decanter where the acrylonitrile containing organic phase of the condensate is separated and recovered from the aqueous phase. The aqueous phase is recycled to the primary condenser to significantly reduce the acrylonitrile level in the aqueous phase and enhanced the separation.

Abstract: There is disclosed a process for hydroformylation of carbon black. The carbon black is hydroformylated by reacting carbon black with carbon monoxide and hydrogen under hydroformylation conditions in the presence of a hydroformylation catalyst and organic reaction solvent. Addition of the hydroformylated carbon black enhances the rates of cure of sulfur vulcanizable rubber.

Abstract: There is disclosed an improved method for open steam curing of mineral-loaded elastomers. It has been discovered that use of a vulcanization agent comprising a mixture of an alkyl phenol disulfide and a guanidine compound provides a synergistic curing system that is superior over the use of either component alone. The improved curing system of the present invention is particularly suited for the open steam curing of mineral-loaded chlorobutyl compounds. The cure system may be used in addition to zinc oxide and results in excellent states of cure as determined by tensile elongation and hardness measurements.