Abstract: The present invention relates to unsaturated amine-functional silane compounds of the formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are independently selected from the group consisting of alkoxy radicals having from 1 to 8 carbon atoms, alkyl radicals having 1 to 8 carbon atoms and aryl radicals having 6 carbon atoms, with the proviso that at least one of R.sup.1, R.sup.2 and R.sup.3 is an alkoxy radical; R.sup.4 is selected from the group consisting of alkylene groups having from 1 to 18 carbon atoms and arylene and alkyl substituted arylene groups having from 6 to 10 carbon atoms; R.sup.5 is selected from the group consisting of hydrogen and an alkyl group having 1 carbon atom and X is a halogen atom selected from the group consisting of Cl, Br and I.

Abstract: The present invention relates to a pneumatic tire having a tread with a plurality of load-supporting elements placed above the circumference of the tire. The tread is characterized by a pitch sequence comprising(a) from 67 to 103 total pitches;(b) only four or five different pitch lengths; and the lowest indivisible integers used for the pitch sequences having four pitch lengths are 7-8-9 and 10 and the lowest indivisible integers used for the pitch sequences having five pitch lengths are 7-8-9-10 and 11(c) a ratio of the longest pitch to the shortest pitch length not to exceed 1.58;(d) a ratio of the longer pitch length to the shorter pitch length of any two pitches which precede or follow each other not to exceed 1.

Abstract: The present invention relates to a process for the preparation of unsubstituted and alkyl-substituted diaryl-phenylenediamines.

Abstract: The present invention relates to a pneumatic tire having a tread with a plurality of load-supporting elements placed above the circumference of the tire. The tread is characterized by a pitch sequence comprising(a) from 52 to 65 total pitches;(b) only four different pitch lengths and the lowest indivisible integers used for the pitch ratios for the four pitch lengths are 11-13-15 and 17;(c) a ratio of the longest pitch to the shortest pitch length not to exceed 1.55;(d) a ratio of the longer pitch length to the shorter pitch length of any two pitches which precede or follow each other not to exceed 1.37;(e) there being no instance in the pitch sequence where the shortest pitch length directly precedes or directly follows the longest pitch length;(f) there being a constant increment in pitch length in the four different pitch lengths as one progresses from the shortest pitch length to the longest pitch length.

Abstract: A method is disclosed for increasing the rate of vulcanization of a sulfur rubber composition comprising heating a sulfur vulcanizable rubber composition to a temperature ranging from 100.degree. C. to 200.degree. C., said rubber composition, containing a sulfur vulcanizable rubber, a sulfenamide compound and a hydrated thiosulfate. Addition of the hydrated thiosulfate to a sulfur vulcanizable rubber and a sulfenamide compound significantly increases the rate of vulcanization of the rubber.

Abstract: The present invention relates to rubber compositions containing a pyrazine amide of the formula: ##STR1##

Abstract: A metallic cord for the reinforcement of elastomers comprising seven strands of two filaments wherein one strand is surrounded by six strands and the six strands are twisted in the same direction and have the same lay length.

Abstract: This invention relates to the discovery that tetrabenzylthiuram disulfide in combination with a bismaleimide compound and a sulfenamide compound provides for excellent vulcanization of rubbers and results in an improved final rubber vulcanizate possessing superior physical properties and reversion resistance.

Abstract: This invention relates to the discovery that the addition of a free triacrylate, tetraacrylate and/or pentaacrylate compound(s) to an uncrosslinked rubber which is then sulfur-vulcanized results in desirable reversion resistant rubber compound properties.

Abstract: The present invention relates to a ternary polymer blend particularly suited for use in tire treads and carcass ply compounds. The ternary blend is composed of, based on 100 parts by weight of the ternary polymer blend, from about 76 to 94 parts by weight of polyisoprene; 3 to 12 parts by weight of epoxidized natural rubber; from about 3 to 12 parts of chlorosulfonated polyethylene.

Abstract: A method is disclosed for processing a rubber composition comprising thermomechanically mixing at a rubber temperature in a range of 140.degree. C. to 190.degree. C. for a mixing time of 1 to 20 minutes(i) 100 parts by weight of at least one sulfur vulcanizable elastomer selected from conjugated diene homopolymers and copolymers, natural rubber and copolymers of at least one conjugated diene and aromatic vinyl compound;(ii) 10 to 250 phr of particulate precipitated silica;(iii) 0.01 to 1.0 parts by weight per weight of said silica of an organosilicon compound; and(iv) 0.05 to 10 phr of sodium thiosulfate pentahydrate.Addition of the sodium thiosulfate pentahydrate to sulfur vulcanizable rubber, silica and sulfur containing organosilicon compound decreases the mixing/processing time without sacrificing end product properties.

Abstract: The present invention relates to a zinc salt of the formula: ##STR1## and rubber compounds containing such salts.

Abstract: This invention relates to a novel class of polymeric compositions which have molecular weights ranging from 300 to 10,000 and are the reaction product of (a) an N-aryl or N-alkaryl substituted diphenyldiamine and (b) a conjugated or nonconjugated diene. These polymeric N-aryl substituted and N-alkaryl diphenyldiamine compounds are particularly useful as an antioxidant in diene containing polymers.

Abstract: The present invention relates to silica-filled rubber compositions and their method of processing. The rubber compositions contain a mixture of 10 to 150 phr of a particulate precipitated silica having dispersed thereon, from 1 to 20 percent by weight based upon the weight of the silica, of a silane-modified elastomer.

Abstract: The present invention relates to rosinate esters of N-hydroxyphenyl maleamic acid which are useful as a total or partial replacement for extender or processing oil in rubber formulations. Addition of these rosinate esters improve the modulus and tear of the vulcanizate.

Abstract: The present invention relates to the use in a silica-filled rubber composition of an aminosilane compound of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are independently selected from the group consisting of alkoxy radicals having from 1 to 8 carbon atoms, alkyl radicals having 1 to 8 carbon atoms and aryl radicals having 6 carbon atoms, with the proviso that at least one of R.sup.1, R.sup.2 and R.sup.3 is an alkoxy radical; R.sup.4 is selected from the group consisting of alkylene groups having from 1 to 18 carbon atoms and arylene and alkyl substituted arylene groups having from 6 to 10 carbon atoms; R.sup.5 is selected from the group consisting of hydrogen and alkyl groups having from 1 to 15 carbon atoms.

Abstract: The present invention relates to rubber compounds containing acids of the formulae: ##STR1## or mixtures thereof.

Abstract: The present invention relates to a heterogeneous silica/carbon black-filled rubber compound and a process for making the same. The rubber compound is characterized by containing silica, two different carbon blacks and two different rubbers. One of the carbon blacks is selectively dispersed in one rubber along with the silica and the other carbon black is dispersed in another rubber. The two rubber compounds are then mixed to form a heterogeneous rubber compound.

Abstract: This invention relates to the discovery that the combination of tetrabenzylthiuram disulfide, cashew nut oil modified novolak-type phenolic resin, a bismaleimide compound and a sulfenamide compound provides for excellent vulcanization of rubbers and results in desirable final rubber vulcanizate physical properties in the absence of generating undesirable nitrosamines and fumes during processing and cure.

Abstract: The present invention relates to a process for the preparation of organosilicon polysulfide compounds. The process involves reacting a mercaptoalkoxysilane with a dithiodimorpholine compound.