Abstract: The process of this invention can be utilized to synthesize polymers having a high trans microstructure. The polymers which can be prepared utilizing the procedure of this invention include high trans-1,4-polybutadiene, styrene-isoprene-butadiene terpolymers with high trans-1,4-polybutadiene microstructures, high trans-isoprene-butadiene copolymers, and styrene-butadiene copolymers having high trans-1,4-polybutadiene microstructures. Such polymers can be utilized in tire tread rubber compounds which exhibit improved wear characteristics, tear resistance and low temperature performance characteristics. This invention more specifically reveals a process for synthesizing a high trans polymer which comprises adding (a) at least one organolithium initiator, (b) an organoaluminum compound, (c) a barium alkoxide, and (d) a lithium alkoxide to a polymerization medium which is comprised of an organic solvent and at least one conjugated diene monomer.

Abstract: A method is provided for the direct synthesis of novel polymeric materials functionalized with desirable nitrogen-containing functional groups such as terminal azido, cyano, carbonylamino or thiocarbonylamino groups. Polymerization and functionalization occur in a substantially simultaneous manner. All necessary reactants for the functionalization are present when polymerization is initiated. The nitrogen-containing functional group is provided as a part of a molecule having a release moiety which is preferably resonance stabilized or a tertiary alkyl type and which acts to aid the nitrogen-containing species in functioning as a leaving group.

Abstract: A method for producing a propylene-.alpha.-olefin block copolymer, which comprises polymerizing propylene in the presence of a catalyst and then polymerizing in a gas phase an .alpha.-olefin other than propylene, or propylene and other .alpha.-olefin without deactivating the catalyst, wherein at least one compound selected from the group consisting of an aromatic carboxylic acid ester, a phosphorous ester, an unsaturated dicarboxylic acid diester, an amine compound and an amide compound, is supplied to the latter gas phase polymerization system.

Abstract: Disclosed are a toner for development of electrostatic image, comprising as the main component a resin obtained by allowing a polymer containing a polymer component with low molecular weight and a polymer component with high molecular weight, at least the polymer component with low molecular weight containing a carboxylic acid component, to react with a polyvalent metal compound, and a method of fixing a toner image employing the toner described above.According to the present invention, there can be provided a toner for development of electrostatic image which has more improved fixability without lowering the anti-off-set property already improved, and also which can be prepared with good reproducibility without causing gelation to occur although the metal compound may be formulated therein, and can be improved in fixability without making charging characteristics unstable and at the same time without bringing about lowering in anti-off-set property, and thus an excellent toner image can be fixed.

Abstract: In curing dental resins, polymerizable compounds having at least one ethylenically unsaturated double bond, such as mono- or poly-functional acrylates or methacrylates are polymerized in the presence of N-cyclohexy-5-ethylpyrimidinetrione, a specific organometallic compound typically including acetylacetone copper or lithium acetate, and an organohalogen compound. The amounts of the ethylpyrimidinetrione, organometallic and organohalogen compounds used are respectively 0.1 to 10 parts by weight, 0.001 to 0.2 parts by weight and 0.1 to 5 parts by weight with respect to the polymerization compounds.

Abstract: A process for the production of .alpha.-olefin block copolymer particles having excellent impact resistance at low temperature and excellent molding and processing characteristics, is disclosed. The process includes a two step gas phase polymerization procedure under specific conditions in the presence of a specific catalyst system.

Abstract: A block copolymer of propylene is produced by using propylene itself as a liquid medium, conducting continuous polymerization (former-stage polymerization) of propylene alone or propylene and a small amount of ethylene at first and then conducting batchwise copolymerization (latter-stage polymerization) of ethylene and propylene. The amount of an activity improver to be added to a polymerization tank for the latter-stage polymerization and/or the polymerization time of the latter-stage polymerization are controlled in accordance with the amount of a slurry transferred from a polymerization tank for the former-stage polymerization to the polymerization tank for the latter-stage polymerization so as to maintain the ratio of the amount of the polymer polymerized by the former-stage polymerization to the amount of the polymer polymerized by the latter-stage polymerization constant in the block copolymer.

Abstract: The invention relates to a method of preparing allyl-terminated polyisobutylene (PIB) by allylation with allyltrimethylsilane of tertiary chloro-capped PIB by electrophilic substitution. The synthesis begins with the BCl.sub.3, catalyzed mono- or oligo-tertiary chloride "inifer" initiated polymerization of isobutylene, followed in the same reaction vessel by the addition of hexane, allyltrimethylsilane, and TiCl.sub.4.

Abstract: A process for producing a propylene block copolymer in the presence of a highly stereospecific olefin polymerization catalyst which comprises producing a crystalline polymer or copolymer of propylene in a first stage and random-copolymerizing propylene and another alpha-olefin in a mole ratio of from 10:90 to 90:10 in the presence of the propylene polymer or copolymer in a second stage; wherein in the random copolymerization, 0.0001 to 0.5 mole, per gram atom of aluminum in the catalyst, of an oxygen-containing compound being gaseous in a standard condition or 0.001 to 1 mole, per gram atom of aluminum in the catalyst, of an active hydrogen-containing compound being liquid or solid in a standard condition is fed into the random-copolymerization reaction system.

Abstract: Macromonomers of polymer-dicyclopentadiene and polymer-ethylidenenorbornene are prepared and then terpolymerized with ethylene and propylene. The terpolymer exhibits compatibilization of ethylene-propylene rubber and butyl rubber, and thus is useful as a sealant, roofing material, caulking agent, and the like.

Abstract: A process for producing a propylene block copolymer by a three-step reaction in the presence of a stereoregular catalyst. At the first step, propylene is polymerized at a temperature of 55.degree. C. or more to form polypropylene having an intrinsic viscosity of from 0.5 to 3.5 in the prescribed amount. At the second step, propylene is polymerized at a temperature of from 30.degree. to 90.degree. C. to form polypropylene having an intrinsic viscosity of at least 4 in the prescribed amount. And at the third step, ethylene and propylene are copolymerized at a temperature of from 30.degree. to 90.degree. C. to form an ethylene-propylene copolymer having an intrinsic viscosity of at least three in the prescribed amount. The propylene block copolymer formed by the three steps is superior and well balanced in impact resistance and stiffness.

Abstract: Excellent and very high quality impact-resistant polymer products products are comprised of particular polyether elastomer constituents which modify and attribute many desirable properties and characteristics to the interpolymerized end product; impact styrene polymers being especially advantageous varieties thereof. In-situ polymerization, with specific coordination catalyst systems, is followed to form polyether polymers of epoxidized monomer constituents provided directly dissolved (or dispersed) in the major addition-polymerizable monomer utilized. The rubbery polyether elastomer so made is then interpolymerized with the major monomer to provide the advantageous high impact end product.

Abstract: Aromatic hydrocarbon resins having a number-average molecular weight of 500-2,500 and containing, in particular, units derived from styrene and/or from its higher homologs, are acylated with vinylketone groups RR'C.dbd.CR"--CO-- grafted onto the aromatic nuclei of the said resin, said resin further containing from 10 to 90 mol %, and preferably from 30 to 60 mol %, of units derived from indene and/or from its higher homologs, and containing from 0.02 to 0.07 grafted vinylketone group per aromatic nucleus.The resultant acylated resins are either polymerized anionically to polymers having a weight-average molecular weight ranging from 10.sup.4 to 2.10.sup.7, or are copolymerized with a living polymer such as polymethyl methacrylate.

Abstract: A propylene composition having a notably improved high-impact strength and elongation at break, with a relatively slight reduction in rigidity is provided, which composition is a high-impact polypropylene composition comprising 60 to 95 parts by weight of polypropylene and 40 to 5 parts by weight of a chlorinated polyolefin having styrene graft-polymerized thereon.

Abstract: Impact modified polycycloolefin is made by ring opening bulk polymerization of at least one monomer containing at least one norbornene group in presence of an organoammonium molybdate or tungstate catalyst and an alkoxyalkylaluminum halide cocatalyst as well as a sufficient amount of a polyolefin powder and a rubbery material to produce ductile polycycloolefin.

Abstract: Impact modified polycycloolefin is made by ring opening bulk polymerization of at least one monomer containing at least one norbornene group in the presence of an organoammonium molybdate or tungstate catalyst and an alkoxyalkylaluminum halide cocatalyst as well as a sufficient amount of an impact modifier selected from polyolefin powders and polyvinylidene fluoride powders.

Abstract: Copolymers or graft copolymers of from 5 to 95% by weight of .alpha.-olefins corresponding to the following general formula (A): ##STR1## wherein R.sup.1 represents alkyl having from 1 to 16 carbon atoms or phenyl; and from 5 to 95% by weight of straight-chain, branch-chain or crosslinked 1,4-polyenes, and a process for the preparation of such polymers, wherein one or more .alpha.-olefins (A) are reacted with a solid catalytic complex based on TiCl.sub.3 and aluminum compounds corresponding to the following general formula (C):Al R.sup.2.sub.n X.sub.3-n (C)wherein R.sup.2 represents C.sub.1 -C.sub.18 alkyl; X represents halogen, preferably chlorine; and 0<n.ltoreq.3; in the presence of a solution of polyene (B) in an inert solvent or in the presence of a gel of polyene (B) swelled in an inert solvent, and the final linkage between component (A) and component (B) is produced at the end of polymerization by the addition of a dihalogen aluminum alkylene corresponding to the following general formula (D):X.

Abstract: A process is disclosed for producing thermoelastomeric 3-block copolymers of the ABA (or ABC) type, the end blocks being a plastomeric nature and the intermediate block of an elastomeric nature, by cationic polymerization employing a composite catalytic system comprised of Aluminium alkyl, possibly with a halogen substituent, and of a halogen or a halogen-substituted hydrocarbon radical.

Abstract: Novel telechelic halogenated polymers of cationically polymerizable olefin monomers are formed carrying from 2 to about 6 terminal halogens. The telechelic halogenated polymers are formed by reacting the monomer with an initiator transfer agent, carrying at least two tertiary halogens, and under cationic polymerization conditions. Additionally, novel thermoplastic elastomer block copolymers are formed from these telechelic halogenated polymers by reacting the latter with vinyl aromatic monomers in the presence of a coinitiator.

Abstract: Three-block copolymers of the ABA and ABC type are disclosed in which A and C are plastomeric monomers and B is an elastomeric polymer are disclosed, which are prepared by first polymerizing the block A in such a way to keep alive the active centers in the chain ends for a time sufficient to permit the addition of the second monomer B, whereafter, with the aid of a special catalytic system, the growth of the third block C, can be carried out. A and C are mutually interchangeable. The catalyst for polymerizing the block A is a Lewis' acid aided by isobutene and the catalyst for introducing and copolymerizing C (or A) is a chloride of aluminium alkyl.

Abstract: A highly extended,unsaturated polyester resin syrup composition mixture comprising unsaturated polyester resin syrup, basic aluminum chloride and non-reinforcing extender material which is substantially non-reactive with the resin syrup and the basic aluminum chloride. The composition mixture may be used to prepare a shaped article comprised of the cured, cross-linked composition. The article is prepared by first forming a first component comprising unsaturated polyester resin syrup and non-reinforcing extender material and a second component comprising a solution of basic aluminum chloride and non-reinforcing extender material. The two components are mixed together to yield the composition mixture which possesses a viscosity low enough to be worked with conventional apparatus. The composition mixture is then shaped into the configuration of the desired article, allowed to cure and, if necessary, allowed to set.

Abstract: A process for production of the maleic anhydride adduct of a liquid polymer having a maleic anhydride addition amount of 2 to 70% by weight, which comprises reacting a liquid polymer having a molecular weight of 150 to 5,000 and a viscosity of 2 to 50,000 cp at 30.degree. C. in the presence of at least one compound, as a gelation inhibitor, selected from the group consisting of imidazoles, thiazoles, metallic salts of mercaptothiazoles, urea derivatives, naphthylamines, nitrosamines, iron, iron compounds and specific halogen compounds, said liquid polymer being selected from the group consisting of liquid polybutadienes, liquid polyisoprenes and liquid copolymers comprising units of butadiene or isoprene and units of at least one compound selected from the group consisting of other diolefins, olefins and aromatic vinyl compounds.