Abstract: The green strength of elastomers is improved by the addition of semi-crystalline butene polymers selected from the class consisting of polybutene and interpolymers made from 1-butene monomer and at least one monomer selected from the class consisting of alpha-olefins, non-conjugated dienes, and non-conjugated polyenes. The blend composition may also include reclaimed rubber. The semi-crystalline butene polymer is mixed with a desired elastomer such as natural or synthetic cis-1,4-polyisoprene, or a synthetic elastomer made from monomers selected from the class consisting of conjugated dienes having from 4 to 10 carbon atoms, interpolymers of said dienes among themselves or with vinyl substituted aromatic hydrocarbon compounds having from 8 to 12 carbon atoms, or polyalkenylenes. The mixing or blending of the butene polymer and the elastomer may be through conventional methods such as cement mixing or mastication.

Abstract: Pink discoloration in amine antioxidant and antiozonant emulsions utilized in the latex industry at high pH has been prevented or retarded by the addition of stabilizers selected from dialkylhydroxylamines or mercaptans. These stabilizers are added at a ratio of from 0.1 to 5 parts by weight per 100 parts by weight of the age resister. In addition, a reversal of discoloration in a liquid amine antioxidant has been achieved by mixing the same type of stabilizer directly with the antioxidant.

Abstract: There is disclosed a cyclized block copolymer having a molecular weight of from about 10,000 to about 300,000 comprised of at least two different blocks, at least one of which blocks is a cyclizable block derived from a conjugated diene monomer of the general structure ##STR1## wherein, R.sub.1 is selected from a hydrocarbyl group containing one to twelve carbon atoms, R.sub.2 is selected from hydrogen or a hydrocarbyl group containing one to twelve carbon atoms; and at least one of which blocks is a non-cyclizable block derived from at least one member selected from the following classes of compounds:(a) polymers of conjugated diene monomers of the general structure ##STR2## wherein: R.sub.3, R.sub.4 and R.sub.5 are the same or different and are selected from hydrogen or a hydrocarbyl group containing one to twelve carbon atoms; R.sub.6 is selected from hydrogen, a hydrocarbyl group containing one to twelve carbon atoms or a cyano group,(b) polymers of .alpha.

Abstract: Ester such as 3,6,9-trioxaundecane-1,11-bis (3-n-dodecylthiopropionate) when combined with conventional free amine antioxidants such as N,N'-diphenylparaphenylenediamine or with polymer bound antioxidants such as N-(4-anilinophenyl) methacrylamide produce improved antioxidant systems for SBR and NBR type polymers.

Abstract: There is disclosed a process for the preparation of gel-free rubbery copolymers of cyclopentene and dicyclopentadiene by means of a catalyst system comprising (A) a soluble tungsten halide or oxyhalide, (B) an organoaluminum compound, (C) an alcohol and (D) a polyhalogenated phenol.

Abstract: Separation of diisopropylbenzene dihydroperoxide from a diisopropylbenzene oxidation reaction mixture by treating the reaction mixture with concentrated alkali metal hydroxide and recovering the alkali metal salt of diisopropylbenzene dihydroperoxide in high purity and good yield, and subsequently converting the salt to diisopropylbenzene dihydroperoxide.

Abstract: There is disclosed a process for the preparation of medium vinyl polybutadiene which comprises copolymerizing butadiene with small amounts of divinylbenzene in a hydrocarbon solvent system employing as a catalyst an alkyl lithium compound which has been modified by mixtures of polar compounds, at least one of which polar compound is selected from the group consisting of hexamethylphosphoric acid triamide (HMPA), N,N,N'N'-tetramethylethylene diamine (TMEDA), ethylene glycol dimethyl ether (glyme), diethylene glycol dimethyl ether (diglyme), triethylene glycol dimethyl ether (triglyme) and tetraethylene glycol dimethyl ether (tetraglyme), and at least one of which polar compound is selected from the group consisting of tetrahydrofuran (THF), 1,4diazabicyclo [2.2.2] octane (DABCO), diethyl ether, triethylamine, tri-n-butylamine, tri-n-butylphosphine and p-dioxane, in which the temperature is maintained constant throughout the polymerization.

Abstract: Dihydric phenols produced by rearrangement of p-dialkylbenzene hydroperoxides are recovered from the rearrangement effluent by distilling byproduct ketone in a distillation tower from a mixture of the rearrangement effluent with benzene and dihydric phenol-containing aqueous feed and extracting impurities and aromatic byproducts with benzene. Benzene containing dissolved impurities and aromatic byproducts, and water containing the dihydric phenol are removed from the bottom of the distillation tower and separated in an extractor column, the dihydric phenol is recovered from its aqueous solution by crystallization and the mother liquor from the crystallization step is recycled to the distillation tower.

Abstract: A combination of a phenolic antioxidant, such as the butylated reaction product of p-cresol and dicyclopentadiene and an ester such as 3,6,9-trioxaundecamethylene bis [3-(dodecylthio)propionate] is used to stabilize polymers against oxidative degradation.

Abstract: Detrimental color changes in liquid diphenylamine age-resisters have been inhibited and/or reduced by combining with the age-resisters small amounts of a color inhibitor selected from the group consisting of trialkylol amines, glycol diesters of sulphur-containing monocarboxylic acids, and dialkyl esters of thiodicarboxylic acids in a weight ratio of color inhibitor to age-resister of from 0.25:99.75 to 5:95.

Abstract: Alkylated hydroquinones are prepared by reacting hydroquinone with olefins having 8 and 9 carbon atoms.

Abstract: There is disclosed a process for the preparation of cyclopentene which comprises selectively hydrogenating cyclopentadiene in a liquid phase by contacting cyclopentadiene with hydrogen in the presence of a hydrogenation catalyst comprising (1) a soluble nickel compound, (2) an organoaluminum compound or a lithium alkyl compound, and (3) at least one cocatalyst compound selected from the group consisting of H.sub.2 O; NH.sub.3 ; ROH where R is an alkyl or a halogenated alkyl radical containing from 1 to 20 carbon atoms; ##STR1## where R.sub.1, R.sub.2 and R.sub.3 may be hydrogen, or an alkyl radical containing from 1 to 6 carbon atoms; ##STR2## where R.sub.1, R.sub.2 and R.sub.3 may be hydrogen or halogen, or an alkyl radical containing from 1 to 6 carbon atoms; R.sub.1 O R.sub.2 wherein R.sub.1 and R.sub.2 may be the same or different alkyl radicals containing from 1 to 6 carbon atoms; and ##STR3## wherein R.sub.1 may be alkyl or an aromatic radical containing from 1 to 8 carbon atoms and R.sub.

Abstract: Phenolic age resistors such as 4-(3,5-ditertiary butyl-4-hydroxyphenyl)-2-butyl 2-methyl-4-thia-6-octanoyloxyhexanoate are used as antioxidants in diene rubbers, such as butadiene-styrene types and in polyolefins, such as polypropylene.

Abstract: There is disclosed a process for the preparation of polymers of cyclopentene or copolymers of cyclopentene with non-conjugated unsaturated alicyclic compounds containing at least 7 carbon atoms in the ring and at least one double bond in the ring or polycyclic olefins or non-conjugated diolefins by the use of the catalyst system comprising (a) tungsten halides or oxyhalides, (b) an organoaluminum compound, (c) an alcohol, and (d) a halogenated phenol.

Abstract: Method of polymerizing conjugated diolefinic monomers containing from 4 to about 12 carbon atoms to high molecular weight polymers by bringing said monomers into contact with a catalyst system consisting of (1) an iron-containing compound, (2) an organometallic reducing agent from Groups I and III of the Periodic Table, and (3) a nitrogen-containing ligand.

Abstract: This invention concerns a method for the preparation of polyphenolic esters for use as built-in antioxidants.

Abstract: There is disclosed a method for copolymerizing cis-1,3-pentadiene and trans-1,3-pentadiene to prepare cis-1,4-polypentadienes. Other conjugated diolefins, including butadiene, isoprene, 2-ethyl-1,3-butadiene and 2-methyl-1,3-pentadiene also may be copolymerized with the cis-1,3-pentadiene isomer to prepare elastomeric copolymers. The polymerization catalyst is a ternary catalyst system comprising (A) a soluble chromium compound, (B) organometallic compounds such as a trihydrocarbylaluminum, and (C) a dihydrocarbyl hydrogen phosphite.

Abstract: There is disclosed a method for the preparation of very high cis-1,4-polypentadiene which comprises polymerizing cis-1,3-pentadiene, also known as cis-piperylene, with a ternary catalyst system comprising (A) a soluble chromium compound such as chromium salts of organic acids, organic complex compounds of chromium containing tridentate organic ligands, and .pi.-bonded organochromium compounds, (B) an organometallic, such as trialkylaluminums, dialkylmagnesiums or dialkylzincs, and (C) dialkyl hydrogen phosphites.

Abstract: There is disclosed a process for the preparation of cyclopentene which comprises selectively hydrogenating cyclopentadiene in the liquid phase by contacting cyclopentadiene with hydrogen in the presence of a hydrogenation catalyst comprising a highly dispersed form of nickel in which ammonium hydroxide is employed in the reaction mixture.

Abstract: Antioxidants such as S-[3-(3,5-ditert.-butyl-4-hydroxyphenyl) propyl] thiomethacrylate are used to stabilize polymers either by being physically incorporated therein or by being polymerized in combination with other monomer to form polymers with built-in antioxidant protection.