Abstract: A catalyst system comprising certain bimetallic metallocenes and an alumoxane is provided together with a process for the preparation of high molecular weight ethylene-alpha olefin elastomers and ethylene-alpha-olefin nonconjugated diolefin elastomers wherein the requisite monomers are polymerized in the presence of the bimetallic metallocene/alumoxane catalyst system.

Abstract: A process for producing high cis-1,4-polybutadienes using a catalyst system based on a rare earth compound that exhibits improved catalytic activity is provided which process comprises polymerizing 1,3-butadiene in a polymerization medium comprising a hydrocarbon solvent at a temperature of from about 0.degree. C. to about 120.degree. C. in the presence of a catalyst system which is a mixture of (1) a rare earth carboxylate selected from the group of neodymium carboxylates wherein the carboxylate has from 4 to 12 carbon atoms, (2) an alkyl aluminum chloride selected from the group of compounds represented by the formulae R.sup.2 AlCl.sub.2, R.sup.2.sub.3 Al.sub.2 Cl.sub.3 and R.sup.2.sub.2 AlCl wherein R.sup.2 is a hydrocarbon residue having from 8 to 12 carbon atoms and (3) an organo aluminum compound of the formula R.sup.3.sub.2 AlH wherein R.sup.

Abstract: There is provided a process for the preparation of a high cis-1,4-polybutadiene with a reduced microgel content wherein a novel catalyst system consisting of (1) a nickel salt of a carboxylic acid, (2) a mixture of triethyl aluminum and an organoaluminum compound having the formula R.sub.3 Al, said mixture having an average composition Et.sub.3-x R.sub.x Al wherein Et is an ethyl group, x is a numeral from 0.1 to 2.9 and R is an alkyl group having 8 to 12 carbon atoms, and (3) a boron trifluoride etherate is used to polymerize 1,3-butadiene in an inert hydrocarbon.

Abstract: An improved process is provided for the recovery of a polymer from a solution thereof in a process wherein the polymer solution is contacted with hot water and steam to yield a slurry in water of polymer particles and a vapor stream comprising water vapor and the solvent, the slurry in water of polymer particles is passed to means to grossly separate the polymer particles and the water and the polymer particles are dried, wherein the water contains small particles of polymer and a portion thereof is mixed with the original polymer solution and the remaining portion is passed to the vessel wherein the polymer solution is first contacted with hot water and steam.

Abstract: A process for producing high cis-1,4-polybutadienes wherein there is reduced gel formation is provided which process comprises: polymerizing 1,3-butadiene in a polymerization medium comprising an inert hydrocarbon solvent and water at a temperature of from about -30.degree. C. to about 60.degree. C. in the presence of a catalyst system which is a mixture of (1) a substantially anhydrous divalent cobalt salt, (2) diethyl aluminum chloride or ethyl aluminum sesquichloride and (3) an organo aluminum compound of the formula R.sub.3 Al wherein R is an alkyl group having from 8 to 12 carbon atoms and, optionally triethylaluminum, the molar ratio of chloride in the diethyl aluminum chloride plus (3) being from about 0.7:1 to about 1 and the molar ratio of chloride in the ethyl aluminum sesquichloride plus (3) being from about 0.7:1 to about 1.

Abstract: A process is provided for the removal of tertiary butyl chloride from a hydrocarbon stream, wherein the hydrocarbon stream is contacted at a temperature of from about 130.degree. to about 170.degree. C. with a particulate calcium oxide containing from 1 to 10 mole % of a Group 3 or 4 compound and the hydrocarbon stream is recovered containing a reduced level of tertiary butyl chloride.

Abstract: A process for preparing linear block and three arm star block copolymers having blocks of polyisobutylene and blocks of anionically polymerizable monomers comprises mixing a first solution of a polyisobutylene having a number average molecular weight of from about 4,000 to about 60,000 and having from 1 to 3 terminal allylic halogens with a second solution of a living alkali metal terminated polymer having a number average molecular weight of from about 4,000 to about 60,000 in relative proportions at a temperature of from about 10.degree. C. to about 80.degree. C. for a period of time of from about 30 minutes to about 24 hours whereby a significant amount of linear block or three arm star block copolymer is formed. A polyisobutylene having from 1 to 3 terminal allylic halogens is provided and a process for preparing said polyisobutylene.

Abstract: A halogenated polymer analogous to halogenated butyl rubber is prepared by a process wherein a monomer charge comprising isobutylene, and a conjugated diolefin having the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 which may be the same or different are a methyl group or a hydrogen atom and X is bromine or chlorine together with a initiator having the formula ##STR2## wherein each R.sub.4 may be the same or different is a alkyl, aryl or aralkyl group of 1 to 8 carbon atoms and n is a positive whole number are introduced into a suitable reaction vessel in a specified ratio at a temperature of from about -90.degree. to -10.degree.C., a solution of a Lewis acid is added and the monomers are copolymerized at said temperature to form said halogenated polymer, and the halogenated polymer is recovered from solution.

Abstract: Water sampling equipment and a method of using the same are provided wherein the water sampling equipment comprises a two component metal containment unit containing glass sample bottles, the two components of which are screwable detachable one from the other and which are designed to provide flow through of water from the water stream to be sampled allowing the glass sample bottles to readily be filled.

Abstract: Novel, uncured tapes are provided comprising a raw polymer mixture of HDPE, LLDPE or isotactic polypropylene, chlorosulfonated polyethylene rubber, a small amount of a filler or pigment and, optionally, a minor proportion of chlorinated polyethylene rubber or an elastomeric polymer. They are self-bonding when elongated at least about 50% and wrapped on a substrate, and possess various degrees of flame resistance depending on their composition.

Abstract: A process for grafting halogenated butyl rubbers with polymers based on conjugated diolefin monomers is provided which comprises mixing a first solution of halogenated butyl rubber with a second solution of a living alkali metal terminated polymer based on conjugated diolefin monomers and having a number average molecular weight of at least 40,000 at a temperature of from about -10.degree. C. to about 80.degree. C. for a period of time of from about 30 minutes to about 24 hours whereby the graft copolymer is formed. Rubber compositions comprising the halogenated butyl rubber graft copolymers upon vulcanization exhibit improved abrasion resistance and wet skid resistance while a desirable balance of other physical properties is maintained.

Abstract: A process for preparing linear block and three arm star block copolymers having blocks of polyisobutylene and blocks of anionically polymerizable monomers comprises mixing a first solution of a polyisobutylene having a number average molecular weight of from about 4,000 to about 60,000 and having from 1 to 3 terminal allylic halogens with a second solution of a living alkali metal terminated polymer having a number average molecular weight of from about 4,000 to about 60,000 in relative proportions at a temperature of from about 10.degree. C. to about 80.degree. C. for a period of time of from about 30 minutes to about 24 hours whereby a significant amount of linear block or three arm star block copolymer is formed. A polyisobutylene having from 1 to 3 terminal allylic halogens is provided and a process for preparing said polyisobutylene.

Abstract: An improved process is provided for the catalytic hydrogenation of nitrile rubber in solution in an organic medium using a ruthenium catalyst, the improvement being that the hydrogenation is undertaken in the presence of water and a selected organic additive whereby the molecular weight increase in the hydrogenation process is minimized and controlled.

Abstract: An improved process is provided for the catalytic hydrogenation of nitrile rubber in solution in an organic medium using a ruthenium catalyst, the improvement being that the hydrogenation is undertaken in the presence of water and a selected inorganic additive whereby the molecular weight increase in the hydrogenation process is minimized and controlled.

Abstract: A novel rubbery polymer suitable for use in tire tread formulations is characterized in that the polymer comprises polymer particles which have from 2 to 6 domains, each domain comprising from 100 to about 40 weight percent of at least one C.sub.4 to C.sub.8 conjugated diolefin monomer, from 0 to about 60 weight percent of at least one C.sub.3 3 to C.sub.6 alkenyl nitrile monomer and from 0 to about 60 weight percent of at least one C.sub.8 to C.sub.12 monovinylidene aromatic monomer for a total of 100 weight percent of the domain, the monomer composition and/or molecular weight of one domain of each polymer particle differing from the monomer composition and/or molecular weight of each of the other domains of the polymer particle. A process for the production of the rubbery polymer is provided together with a rubber composition comprising the rubbery polymer and at least one diene-based polymer.

Abstract: A process is provided for the production of functional group containing resins wherein an alkyl-dithiol is added to the polymerizing mixture of styrene and divinyl benzene part way through the polymerization. On completion of the polymerization, the product is a thiol functionalized styrene-divinyl benzene resin.

Abstract: A device is provided for attachment to a pressure tank car for use for the removal of the contents of the tank car in the situation when the tank car is damaged or overturned, said device comprising a metallic tubular assembly attached to a valve on the tank car said tubular assembly containing a relatively inflexible rod-like elongate unit which can be pushed through the tubular assembly and into the valve on the tank car such that the sealing float of the excess flow check valve can be held in the open position thereby permitting removal of the tank contents via the tubular asembly.

Abstract: An improved process is provided for the catalytic hydrogenation of nitrile rubber using a ruthenium catalyst wherein the improvement is that the nitrile rubber is provided as an aqueous emulsion and a solvent and a selected inorganic additive are present during the hydrogenation, whereby the molecular weight increase in the hydrogenation process is minimized and controlled.

Abstract: Hydrogenated nitrile rubber based vulcanizates which have at least one of improved load bearing capabilities, improved abrasion resistance and reduced heat build-up are provided, the vulcanizates having been produced by vulcanization of a compound consisting essentially of 100 parts by weight of hydrogenated nitrile rubber, 10 to 85 parts by weight of zinc diacrylate and 1 to 10 parts by weight of an organic peroxide. Such vulcanizates are useful in belts, rolls and hoses.

Abstract: An improved process is provided for the catalytic hydrogenation of nitrile rubber using a ruthenium catalyst wherein the improvement is that the nitrile rubber is provided as an aqueous emulsion and a solvent and a selected organic additive are present during the hydrogenation, whereby the molecular weight increase in the hydrogenation process is minimized and controlled.