Abstract: A new class of “living” free radical initiators that are based on alkylperoxydiarylborane and its derivatives and that may be represented by the general formula. R—[O—O—B-&phgr;1(-&phgr;2)]n wherein n is from 1 to 4, R is a hydrogen or a linear, branched or cyclic alkyl radical having a molecular weight from 1 to about 500, and &phgr;1 and &phgr;2, independently, are selected from aryl radicals, based on phenyl or substituted phenyl groups, with the proviso that &phgr;1 and &phgr;2 can be the chemically bridged to each other with a linking group or with a direct chemical bond between the two aryl groups to form a cyclic ring structure that includes a boron atom are disclosed.

Abstract: An objective of the present invention is to provide an unsaturated nitrile-conjugated diene-typed rubber capable of giving a vulcanized rubber which exhibits is well-balanced in terms of the mechanical strength, the oil resistance and the like, as well as a process for the production of the same, and a rubber composition which is containing such rubber and exhibits an excellent processability as well as a process for the production of the same. The unsaturated nitrile-conjugated diene-typed rubber in the invention is produced by polymerizing using certain amounts of an olefinically unsaturated nitrile monomer such as acrylonitrile and a conjugated diene monomer such as butadiene at first, and continuing by supplying a remainder of the monomers at a certain ratio continuously or stepwise to proceed the polymerization.

Abstract: A new class of “living” free radical initiators that are based on alkylperoxydiarylborane and its derivatives and that may be represented by the general formula.

Abstract: A method of forming a polymer having reactive functionality comprises providing a reaction mixture comprising at least one monomer having at least one reactive functional group and carbon dioxide; and polymerizing the at least one monomer in the reaction mixture to form a polymer having reactive functionality associated with the at least one reactive functional group.

Abstract: A new polymerization process (atom transfer radical polymerization, or ATRP) based on a redox reaction between a transition metal (e.g., Cu(I)/Cu(II), provides “living” or controlled radical polymerization of styrene, (meth)acrylates, and other radically polymerizable monomers. Using various simple organic halides as model halogen atom transfer precursors (initiators) and transition metal complexes as a model halogen atom transfer promoters (catalysts), a “living” radical polymerization affords (co)polymers having the predetermined number average molecular weight by &Dgr;[M]/[I]0 (up to Mn>105) and a surprisingly narrow molecular weight distribution (Mw/Mn), as low as 1.15. The participation of free radical intermediates in ATRP is supported by end-group analysis and stereochemistry of the polymerization. In addition, polymers with various topologies (e.g.

Abstract: This invention relates to rubber polymers based on polymerizable monomers and having an elevated gel content together with an elevated degree of swelling, to the production of the stated rubber polymers and to the use thereof for the production of moldings of all kinds.

Abstract: The present invention is to offer a rubber material composition excellent in an abrasion resistance and less to cause heat by friction, and is suitably used to sealing members of rolling devises to be used with grease lubrication under severe circumstances allowing water or dusts to much exist. The rubber material composition is fabricated with carboxylated acrylonitrile-butadiene rubber.

Abstract: A staged method of forming vinyl (e.g.

Abstract: A process for the reaction of an organic compound in the presence of a catalyst comprising, as active metal, ruthenium alone or together with at least one Group Ib, VIIb, or VIIIb metal in an amount of from 0.01 to 30 wt %, based on the total weight of the catalyst, applied to a support, wherein from 10 to 50% of the pore volume of the support comprises macropores having a pore diameter in the range of from 50 nm to 10,000 nm and from 50 to 90% of the pore volume of the support comprises mesopores having a pore diameter in the range of from 2 to 50 nm, the sum of said pore volumes being 100%, and said catalyst as such.

Abstract: A method is provided to monitor, detect and correct local defluidization and channeling in fluidized-bed reactors for polymerization of olefin and/or diolefin polymers. The detection is preferably conducted by (i) continuously and/or intermittently comparing a signal which is a function of the currently measured fluidization bulk density with a signal which is a function of the time-averaged baselines of fluidized bulk density.

Abstract: An objective of the invention is to provide a conjugated diene-based rubber having a specific composition and a method of producing the same, an oil extended rubber using the same, as well as a rubber composition capable of being converted into a vulcanized rubber which has a low rolling resistance, an excellent wearing resistance and the like, and is useful, for example, as a tire or the like. A conjugated diene-based rubber in the invention has a glass transition point of −60 to 0° C., an olefinically unsaturated nitrile monomer unit randomly contains in its molecular chain, its repeating units consists of 9 to 30% by mass of an olefinically unsaturated nitrile monomer unit such as acrylonitrile, 10 to 50% by mass of an aromatic vinyl monomer unit such as styrene and 20 to 81% by mass of a conjugated diene monomer unit such as 1,3-butadiene, and its Mooney viscosity [ML1+4(100° C.)] is 20 to 200.

Abstract: An objective of the invention is to provide a conjugated diene-based rubber having a specific composition and an oil extended rubber using the same, as well as a rubber composition capable of being converted into a vulcanized rubber which has a low rolling resistance, an excellent wearing resistance and the like, and is useful for a tire or the like. A conjugated diene-based rubber in the invention has repeating units consisting of 1 to 30% by mass of an olefinically unsaturated nitrile monomer unit such as acrylonitrile, 10 to 50% by mass of an aromatic vinyl monomer unit such as styrene, 19.9 to 88.9% by mass of a conjugated diene monomer unit such as 1,3-butadiene and 0.1 to 10% by mass of a monomer unit having one polymerizable unsaturated group and at least one functional group selected from the group consisting of an amino group, a hydroxyl group, an epoxy group, a carboxyl group and an alkoxysilyl group, and has a specific glass transition point and a Mooney viscosity [ML1+4(100° C.

Abstract: The invention relates to a process for the preparation of polybutadienes with a reduced solution viscosity/Mooney viscosity ratio by using polydienyl compounds, the polybutadienes which can be prepared in this process, the use of the polybutadienes according to the present invention for the preparation of rubber mixtures, the use of the rubber mixtures for the production of all types of shaped articles, and the compound dimethyldi-2,4-pentadienyl-(E,E)-silane as an intermediate product.

Abstract: Process for the polymerization of unsaturated vinyl and/or vinylidene monomers which comprises reacting one or more monomers in the presence of heterocyclic initiators having a nitrogen atom bound to an oxygen atom at a temperature ranging from 100 to 130° C.

Abstract: A method of separation of a racemic isomer and a meso isomer from a mixture of a racemic isomer and a meso isomer of a compound shown by the general formula [1] (wherein R1 and R2 are each independently a lower alkyl group or a cyano group, which are different from each other, R3 and R4 are each independently a lower alkyl group, and R5 is a hydrogen atom or a lower alkoxy group), which comprises treating the mixture with a water soluble organic solvent.

Abstract: The present invention relates to macromonomer compounds having the formula (I) where R1 is hydrogen, halogen, and optionally substituted alkyl, aryl, alkylaryl or arylalkyl radical; R2 and R3, which can be similar or different, are hydrogen, halogen, alkyl, aryl, alkylaryl, arylalkyl or alkoxy radical; R4 is an optionally substituted alkyl, aryl, alkylaryl or arylalkyl radical, or —XR5, with R5 being hydrogen, and optionally substituted alkyl, aryl, alkylaryl or aryalkyl; X is oxygen or sulphur; A corresponds to a unit issued from at least one ethylenically unsaturated monomer; and n is comprised between 1 and 10000. The invention also relates to dienic compounds having the formula (II): H2C═CR1—CH═CH—C(R2)(R3)—X2—R6 wherein R1 R2, R3 and X have the same meaning as above and R6 represents R5 or a group —COR7 or —COOR7 with R7 being alkyl, aryl, alkylaryl or arylalkyl.

Abstract: This invention relates to an acrylonitrile-based precursor fiber for the formation of a carbon fiber which is obtained by spinning an acrylonitrile-based copolymer (which contains not less than 90% by weight of acrylonitrile units as monomeric components, contains 5.0×10−5 to 2.0×10−4 equivalent/g of carboxylic acid groups and not less than 0.5×10−5 equivalent/g of sulfate groups and/or sulfonic groups, and has protons and/or ammonium ions as counter ions to the carboxylic acid groups, sulfate groups and sulfonic groups) and treating the resulting coagulated filament, wherein the amount of iodine adsorbable to the acrylonitrile-based precursor fiber is not greater than 0.8% by weight based on the weight of the fiber. By using this precursor fiber, a carbon fiber having a high strength and a high elastic modulus can be easily formed.

Abstract: A continuous mass polymerization process for making an extrusion grade ABS resin having desirable properties and suitable for making refrigerator liners is disclosed. The process comprise charging a reaction mixture into a first in a series of reactors under conditions promoting polymerization, the mixture comprising diene rubber, a mixture of monomers, inert solvent and a chemical initiator to form a reaction mixture. The mixture is then transferred into a subsequent reactor operating at a temperature of 130 to 155° C. with no addition of chemical initiator and the resulting product is then devolatilized. The ABS thus produced contains about 10 to 16 pbw of dispersed rubber particles having an average particle diameter of 0.3 to 0.7 microns.

Abstract: The present invention concerns a novel method for preparing polymers (preferably (meth)acrylate polymers and copolymers) having a narrow molecular weight distribution by metal-free anionic polymerization in the presence of a phosphonium salt of a nitrogen, oxygen and/or sulfur anion. The present invention also concerns block copolymer and methods of making the same using anionic polymerization in the presence of the phosphonium salt to prepare at least one block of the copolymer.

Abstract: A process for preparation of a microgel comprising reacting an alkoxyamine with an unsaturated monomer composition comprising a cross-linking agent comprising at least two double bonds and optionally one or more further monomers selected from monounsaturated monomers and conjugated diene monomers.

Abstract: The present invention provides a 2,2′-bis(6-benzotriazolylphenol) compound represented by the formula wherein A represents a methylene group or the like, R1 and R5 each represent a hydrogen atom, an alkyl group or the like, R2 represents a hydrogen atom or the like, R3 represents an alkylene group or the like, and R4 represents a hydrogen atom or a methyl group. The compound of the invention is useful as an UV absorber. Further, the compound of the invention can be incorporated into a copolymer by copolymerization with a vinyl monomer, and a polymer composition containing the copolymer can be used as an UV absorber.

Abstract: A polymerization process for the preparation of (meth)acrylate containing homopolymers or block copolymers comprises heating a mixture of a free radical initiator, a stable free radical agent, and a polymerizable monomer compound to form a thermoplastic resin or resins with a narrow polydispersity. The stable free radical agent is a piperazinone or morpholone based nitroxide or any adducts thereof.

Abstract: The process of curing a radical-polymerizable multicomponent mixture containing an olefinically-unsaturated compound with ambient air by adding to the mixture an alkyl, cycloalkyl or aryl hydrazone of an aliphatic, cycloaliphatic or aromatic aldehyde or ketone which forms a hydroperoxide as an initiator for curing the mixture.

Abstract: The invention is related to an olefin-carbon monoxide-vinyl monomer terpolymer composition which is derived from an olefin feed and a synthesis gas feed and at least one vinyl monomer feed. The invention is also related to a method for preparing olefin-carbon monoxide-vinyl monomer terpolymers by heating an olefin feed, a synthesis gas feed and at least one vinyl monomer feed in the presence of a free radical polymerization initiator. More particularly, the synthesis gas feed comprises predominantly carbon monoxide and hydrogen. The terpolymers of the invention are useful as polyvinyl chloride plasticizers.

Abstract: This invention describes high-strength fibers with high initial moduli from homopolymers or copolymers comprising at least 70% by weight repeating acrylonitrile and/or methacrylonitrile units, and a process especially adapted for their preparation, and their use, especially as reinforcing materials or for producing filters or friction coatings. The fibers according to the invention have a strength of more than 100 cN/tex and an initial modulus of more than 15 N/tex (based on 100% elongation).

Abstract: Polar polymers having the following formula: FG-(Q)d-Rn-Z-J-[A(R1R2R3)]x   (I) wherein FG is H or a protected or non-protected functional group; Q is a polar hydrocarbyl group derived by incorporation of a polar compound selected from group consisting of esters, amides, and nitrites of acrylic and methacrylic acid, and mixtures thereof; d is an integer from 10 to 2000; R is a saturated or unsaturated hydrocarbyl group derived by incorporation of a compound selected from the group consisting of conjugated diene hydrocarbons, alkenylsubstituted aromatic hydrocarbons, and mixtures thereof; n is an integer from 0 to 5; Z is a branched or straight chain hydrocarbon group which contains 3-25 carbon atoms, optionally containing aryl or substituted aryl groups; J is oxygen, sulfur, or nitrogen; [A(R1R2R3)]x is a protecting group, in which A is an element selected from Group IVa of the Periodic Table of Elements; R1, R2, and R3 are each independently selected from the group consisting

Abstract: Porous membranes having a micro phase separation structure and showing a light transmittance at the wavelength of 400 nm of not less than 30% are obtained by the dry phase conversion method comprising drying a coating layer of a dope containing a polymer, a good solvent for the polymer and a poor solvent for the polymer which solvent has a higher boiling point than the good solvent. The polymer includes cellulose derivatives, vinyl-series polymers such as acrylonitrile-series polymers and (meth)acrylic acid ester-series polymers, polysulfone-series polymers, and the like. The porous polymer membranes have a porosity of 10 to 60%, a mean pore size of about 0.002 to 0.35 &mgr;m and a maximum pore size of not greater than 0.4 &mgr;m. These porous membranes shows not only excellent transparency but also high productivity.

Abstract: There is a need for odorless rubbery polymers that offer high heat resistance, ultraviolet light resistance and low fogging characteristics. For instance, rubbery polymers of this type are needed by the automotive and construction industries. The deodorized rubbery polymers of this invention are of particular value because they can be blended with polyvinyl chloride to make leathery compositions having good heat and ultraviolet light resistance.

Abstract: The present invention describes methods for the detoxification of a mixture of nitrile compounds, or a mixture of nitrile and amide compounds by conversion of the nitrile compound(s) to the corresponding amide or acid compounds using a pure culture of an induced microorganism strain capable of converting a nitrile moiety to an amide or acid moiety. If an amide is formed or is present in the mixture, the amide can be further converted, using the present methods for detoxification, to the corresponding acid. The acid can then, if desired, be further degraded to CO.sub.2, H.sub.2 O and biomass. The induced pure cultures are able to detoxify a mixture of nitriles or a mixture of nitrites and amides which are typically present, in high concentration(s), in nitrile production waste streams.

Abstract: A method for the removal of metal cyanides or oxoanions from aqueous streams such as waste water streams with compounds containing 1,4-diazabicyclo[2.2.2]octane. Preferred compounds are polymers formed by free radical polymerization of N-4-vinyl benzyl-N.sup.1 -1,4-diazabicyclo[2.2.2]octane dichloride (VBBD) such as copolymers poly (VBBD/acrylamide) and poly (VBBD/dimethyl amino ethyl acrylate benzyl chloride quaternary salt. Poly(1,4-dimethylbenzyl-1,4-diazabicyclo[2.2.2]octane dichloride) for the same purposes is also disclosed.

Abstract: This process is characterized in that at least one of the said monomers is polymerized or copolymerized in bulk, solution, emulsion or suspension at a temperature which may be as low as 0.degree. C., in the presence of an initiator system comprising at least one radical-generator compound other than an arenesulphonyl chloride; and at least one catalyst consisting of a metal complex represented by the following formula (I): Ma.sub.a (L).sub.n in which: M represents Ni, Pd or Pt; A represents a halogen or a pseudohalide; the groups L are ligands of the metal M, which are chosen independently from those containing at least one from among N, P, As, Sb, and Bi, it being possible for at least two of these ligands to be connected together by one or more divalent radicals; a is an integer from 1 to 5; n is an integer from 1 to 4; with 4.ltoreq.a+n.ltoreq.6, a+n representing the coordination number of the complex.

Abstract: This invention relates to a process for the synthesis of addition polymers containing branches upon branches and having a polymerizable olefin end group by a convenient one-pot copolymerization of selected vinyl monomers with chain polymerization initiators and a method to provide olefin end groups by chain transfer or termination agents; and polymers produced thereby.

Abstract: The present invention provides a process and apparatus for feeding powders such as fine, cohesive, or powdery particulate materials from a low pressure system to a high pressure system. In a preferred embodiment a process and apparatus of pressurizing and feeding carbon black fluff to a polymerization reactor is provided particularly a gas phase fluidized polymerization reactor to provide for a close-coupling of a carbon black reactor to a polymerization reactor.

Abstract: A process is provided for preparing polymer compositions which are multimodal in nature. The process involves contacting, under polymerization conditions, a selected addition polymerizable monomer with a metallocene catalyst having two or more distinct and chemically different active sites, and a catalyst activator.

Abstract: This dialkylmagnesium is represented by the formula R--(CH.sub.2 --CH.sub.2).sub.n --Mg--(CH.sub.2 --CH.sub.2).sub.n' --R', (E--O--E').sub.x, where R and R' each independently represent a C.sub.1 -C.sub.20 hydrocarbon residue, branched or not, substituted or not, of the alkyl, cycloalkyl or aralkyl type; n and n', identical or substantially identical, represent an average number of --CH.sub.2 --CH.sub.2 -- linkages such that the average number of carbon atoms in each of the two chains borne by Mg is greater than 20; E and E', identical or different, each represent an alkyl radical, linear or cyclical, branched or not; and 0.ltoreq.x.ltoreq.2, x being the average value of the number of moles of E--O--E' ether complexed to the dialkylmagnesium. In order to prepare a dialkylmagnesium of this type, ethylene is polymerized in an anhydrous, de-oxygenated hydrocarbonaceous solution by means of a catalyst Cp*.sub.2 MCl.sub.2 Li(OEt.sub.2).sub.

Abstract: The present invention provides substituted phenols which are effective to inhibit polymer formation during the manufacture of acrylonitrile. Preferred substituted phenols are (a) hindered phenols, nonhindered phenols, and partially hindered phenols, or (b) combinations of hindered phenols with nonhindered or partially hindered phenols. A most preferred substituted phenol is p-nitrosophenol. In a preferred embodiment, the substituted phenols (with the exception of p-nitrosophenol) are combined with hydrogen transfer agents.

Abstract: A improved process is provided for polymerization of olefin and/or diolefin polymer, using sonic cleaning devices, with optimum design and operation, to eliminate or reduce reactor fouling and/or sheeting.

Abstract: Disclosed herein are terpolymers of styrene, acrylonitrile and dimethyl styrene phosphonate and blends thereof with poly(styrene acrylonitrile) polymers and polymers and copolymers of methylmethacrylate.

Abstract: This invention relates to a process for polymerizing acrylonitrile, comprising: (A) forming a polymerizable mixture comprising acrylonitrile monomer, solvent and a metal catalyst; (B) contacting said mixture with an initiator, said initiator being selected from the group consisting of sulfonyl halides, halopropionitriles, substituted halopropionitriles in the form of monoadducts derived from sulfonyl halides and acrylonitrile, monoadducts derived from substituted sulfonyl halides and monomers other than acrylonitrile; or polymers containing end groups derived from sulfonyl halides, halopropionitriles, substituted halopropionitriles in the form of monoadducts derived from sulfonyl halides and acrylonitrile, or monoadducts derived from substituted sulfonyl halides and monomers other than acrylonitrile; and (C) polymerizing said acrylonitrile monomer to form a polymer comprised of acrylonitrile.

Abstract: A treating agent comprises a nitrile group-containing highly saturated polymer rubber latex (A) having an iodine value of 120 or less, a rubber latex (B) other than the highly saturated polymer rubber latex, and a water-soluble resorcinol/formaldehyde condensate in amounts of 15 to 80%, 5 to 70% and 2 to 15%, all by weight in terms of solids, respectively. A rubber-reinforcing fiber product is coated with the treating agent. A rubber article such as a toothed belt, a tire and the like is made using this rubber-reinforcing fiber product. The glass fiber product coated with the treating agent may be further coated with a halogen-containing polymer-based adhesive as a secondary treating agent. Thus, the treating agent exhibits a large bonding force between the reinforcing fiber product and a matrix. Even if the rubber article is repeatedly subjected to a flexing stress, the strength thereof cannot be reduced. A peel-off cannot occurs between the reinforcing fiber product and the rubber matrix.

Abstract: The present invention describes methods for the detoxification of a mixture of nitrile compounds, or a mixture of nitrile and amide compounds by conversion of the nitrile compound(s) to the corresponding amide or acid compounds using a pure culture of an induced microorganism strain capable of converting a nitrile moiety to an amide or acid moiety. If an amide is formed or is present in the mixture, the amide can be further converted, using the present methods for detoxification, to the corresponding acid. The acid can then, if desired, be further degraded to CO.sub.2, H.sub.2 O and biomass. The induced pure cultures are able to detoxify a mixture of nitrites or a mixture of nitriles and amides which are typically present, in high concentration(s), in nitrile production waste streams.

Abstract: A monomer of the formula: ##STR1## wherein R5, R6 and R7 are independently hydrogen, alkyl, cyano, alkyloxycarbonyl or carbamoyl; Z is a spacer or a direct link; and R is hydroxyalkyl having a protected terminal hydroxy, can produce a polymer useful for producting a resist composition.

Abstract: Water recovered from the polymerization of vinyl monomers can be treated to remove or deactivate chain transfer agents present in the water allowing resuse in polymerization processes. The water recovered from a vinyl polymerization reaction is contacted with a cation exchange resin in the hydrogen form prior to recycle, or may be acidified and then contacted with an anion exchange resin in the hydroxide form.

Abstract: Processes for the preparation of a functional polymer of low molar mass, which includes initially charging a first quantity M1 of a mixture including at least one component selected from olefinically unsaturated monomers B and compounds A which are not themselves copolymerizable but which are able to react with at least one of the monomers B to form a copolymerizable addition compound, metering in prior to or during polymerization a second quantity M2 of a mixture whose composition can be identical to or different from that of the first mixture M1 and which includes at least one component selected from olefinically unsaturated monomers B and compounds A, initiating polymerization by use of a polymerization initiator and optionally a chain transfer agent, conducting polymerization in the presence of an oligomer or polymer C, wherein the oligomer or polymer C is either formed in situ from one or more of A and B or is dissolved in at least one of the quantities M1 and M2, wherein at least one of M1 and M2 includ

Abstract: Novel unsaturated peroxides useful as molecular weight regulators in polymerization reactions are disclosed. Also disclosed are a polymerization process employing these novel unsaturated peroxides as molecular weight regulators, polymers and oligomers made by this process and articles of manufacture comprising one or more polymers or oligomers made by this process. These molecular weight regulating peroxides provide the ability to introduce an epoxy functionality to the oligomer or polymer as well as an additional functionality. Further, omega (di) substituted or alpha, omega disubstituted polymers may be synthesized using the unsaturated peroxides of the present invention.

Abstract: A macro-azo initiator obtained by reacting a compound (A) having an azo group in the molecule and having a reactive functional group at each end of the molecule with a compound (B) having an azo group in the molecule and having at each end of the molecule a functional group reactive with the reactive functional groups of the compound (A), is effective for a polymerization process of one or more vinyl monomers and a production process of a block polymer.

Abstract: Novel (2-(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)-2-cyanoacetamido)-phenyl acrylates are disclosed. They are useful in making novel poly?(2-(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)-2-cyanoacetamido)phenyl acrylate! charge-control agents. The charge-control agents are useful for electrostatographic toners and developers.

Abstract: The present invention provides a polyvinyl graft-polymer having one structural unit having a glycidyloxy group represented by the following general formula (I) at side chains of the polyvinyl polymer per 2-1,000 repeating units of vinyl: ##STR1## wherein Ar represents an aromatic hydrocarbon group 6-23 in carbon number having at least one glycidyloxy group, and R represents hydrogen atom or methyl group, and its manufacturing method. The polyvinyl graft-polymer of the present invention is excellent not only in mechanical properties and heat resistance, but also in adhesiveness, paintability dyeability and antistatic property.

Abstract: A resin composition for low expansion moldings which comprises (A) 20 to 80 parts by weight of a vinyl chloride resin having an average degree of polymerization of from 500 to 1700 and (B) correspondingly from 80 to 20 parts by weight of a copolymer made of 60 to 90 parts by weight a polymerizable monomer mixture consisting of 20 to 40 wt % of acrylonitrile, 20 to 60 wt % of .alpha.-methylstyrene and 20 to 40 wt % of styrene and, correspondingly, 40 to 10 parts by weight of a crosslinked acrylic rubber. The resin composition further comprises (C) 0.5 to 30 parts by weight of an acrylic resin having a reduced viscosity of not less than 3.0 dl/g when measured by use of a chloroform solution of the acrylic resin at a concentration of 0.1 g/100 ml, (D) 0.1 to 10 parts by weight of a thermally decomposable rosining agent, and (E) from 1 to 10 parts by weight of a stabilizer, each based on 100 parts by weight of a mixture of the components (A) and (B).

Abstract: This invention relates generally to a living free radical polymerization of alkene monomers through use of persistent metal centered radicals to attain control of the propagation and termination steps in radical polymerization. This process is useful for controlling the molecular weight of homopolymers or copolymers and for forming block copolymers.