Abstract: A process for manufacturing block polymer or copolymer from isotactic polypropylene. Polyolefins are introduced into an extruder. Free radical generator is mixed with the polyolefins to form a mixture at room temperature for free radical formation. The mixture is brought up to a temperature of between 175° C. to 220° C. Chain degradation of the polyolefins is induced by the free radical formation to form degraded polymer. Alkenically unsaturated monomers or polymer segments are mixed with the degraded polymer to form a second mixture. The temperature of the second mixture may be lowered to a temperature of between 90° C. to 150° C. The temperature of the second mixture is then adjusted to a temperature between 100° C. to 250° C. to form a novel block polymer or copolymer.

Abstract: The present invention provides a prepolymerized olefin polymerization catalyst and olefin polymerization method using the same. More particularly, the present invention provides a prepolymerized catalyst that is encapsulated with macromonomers produced by polymerizing olefin monomers with a vinyl-terminated polysiloxane compound in the presence of a solid titanium catalyst for olefin polymerization having been previously surface treated with silane compounds containing two or more vinyl groups, and a method for producing polyolefin having a high melt strength using the catalyst.

Abstract: The present invention is directed to a process for forming star shaped microgels which include a core of crosslinked polymer and multiplicity of substantially linear polymeric arms of macromonomers attached to the core. The process includes polymerizing monoethylenically unsaturated monomers in the presence of a chain transfer agent to form macromonomers each having a terminal polymerizable ethylenically unsaturated group and then polymerizing, in presence of the macromonomers, the monoethylenically unsaturated monomers and multi-olefinic crosslinking monomers. The microgels of the present invention can be used as rheology control agents in waterborne and solvent-borne coatings and in adhesives and cosmetics.

Abstract: The invention relates to a block copolymer and more especially to a thermoplastic elastomer block copolymer. The block copolymer is a diblock (block A)-(bloc B) copolymer, a triblock (block A)-(block B)-(block A), or a triblock (block A)-(block B)-(block C) copolymer, wherein block A is a stiff block, block B is a soft block, and block C is a stiff block. Block A or Block B comprises repetitive units deriving from segregation monomers.

Abstract: A process for preparing microgel(s) that uses a wide range of activatable prepolymers. In the process, a polymer composition of crosslinked component A and soluble components B and C is formed from mono-olefinic and multi-olefinic monomers in the presence of catalyst and initiator. The process comprises: I) introducing mono-olefinic monomer, catalyst, and initiator into a reactor in the absence of multi-olefinic monomer and producing an activatable prepolymer, component B; II) contacting the product of I) with multi-olefinic monomer to produce components A and C, optionally in the presence of additional initiator; also optionally in the presence of additional mono-olefinic monomer and initiator. The ratio of components A/(B+C) can be controlled by varying the mole ratio of The Component B/multi-olefinic monomer from 0.05/1 up to 5/1, by decreasing the mole ratio to increase the ratio of A/(B+C), and increasing the mole ratio to decrease the ratio of A/(B+C).

Abstract: The present invention provides a process for the free radical polymerization of one or more ethylenically unsaturated monomers, said process comprising polymerizing one or more ethylenically unsaturated monomers in the presence of one or more N-oxyl radicals of formula II, wherein X is S, NR5, O, SO or SO2, R5 is C1-C20-alkyl or C5-C8-cycloalkyl and R3 and R4 independently of one another, are C1-C4-alkyl, phenyl, naphthyl or an aromatic five-membered ring, or R3 and R4 together are —(CH2)o— and p and o, independently of one another, are an integer from 2 to 7.

Abstract: The present invention has for its object to produce an isobutylene polymer having excellent performance characteristics by suppressing side reactions at the polymer growth termini during polymerization. The process of the present invention is to carry out a cationic polymerization of a monomer component containing isobutylene in the presence of a polymerization initiator, a catalyst, an ether compound, and an electron donor. Moreover, the process is to carry out a cationic polymerization of a monomer component containing isobutylene in the presence of a polymerization initiator, a catalyst, an ether compound, and an electron donor, and add a compound having the carbon-carbon unsaturated bond for introducing the carbon-carbon unsaturated bond into the polymer terminus.

Abstract: The invention relates to a new process for the preparation of functionalized telechelics based on vinyl polyrners, the telechelics prepared in this way and their use in the plastics, fibers or coating sector.

Abstract: A beaded polymeric adsorbent has a core part; a shell part arranged around the core part, with one of the parts having a lipophilic property and another of the parts having a hydrophilic property, and is produced by preparing an organic phase composed of water insoluble monounsaturated and poly unsaturated comonomers; preparing an aqueous phase composed of a mixture of water soluble monounsaturated and polyunsaturated comonomers; forming a dispersion of the organic phase and the aqueous phase in a single vessel; and creating conditions for first polymerizing of one of the phases which forms the core part and thereafter polymerizing the other of the phases which forms the shell part.

Abstract: A process for preparing a block copolymer. In one embodiment, the block copolymers comprise (A) a poly (vinyl aromatic) block and (B) a poly (vinyl aromatic-co-acrylic) block, said process comprising the steps, (a) polymerizing at an elevated temperature from about 5 to about 95 mole % of a charge comprising at least one vinyl aromatic monomer to prepare a stabilized active polymer block (A), using a free radical polymerization process, wherein a stable free radical agent is employed during the polymerization, thereby preserving the stabilized active polymerization site at the terminus of the poly (vinyl aromatic) block (A); (b) adding at least one acrylic monomer and optionally, additional vinyl aromatic monomer, to the mixture of vinyl aromatic monomer and stabilized active polymer block of (a); and (c) further reacting the mixture of (b) using a free radical process to effect copolymerization of said monomers, thereby preparing a (vinyl aromatic-co-acrylate) block (B).

Abstract: The present invention is a composition for and a method of shortstopping free radical emulsion polymerizations that inhibits the formation of nitrosamines. The composition comprised nitrosamine inhibitors in combination with conventional alkylhydroxylamine shortstoppers. Such nitrosamine inhibitors are based on primary amines, amine-containing polymers, pyrroles, hydroquinones, certain phenols, ascorbic acid, and other well-known nitrosation inhibitors; they may be used individually or as a blend. The compositions are targeted for applications in the emulsion processes for producing rubber latexes and the preparation of rubber products thereafter.

Abstract: Certain mixtures of two superabsorbent powders having very different capillary suctions exhibit a resulting capillary suction which approaches the higher value. The resulting mixtures simultaneously exhibit a high capillary suction and a high intrinsic absorption capacity.

Abstract: A process for producing an isobutylene block copolymer, which comprises performing cationic polymerization of a monomer component containing isobutylene as a major monomer and a monomer component whose major monomer is not isobutylene in the presence of an initiator, wherein the polymerization is carried out in a mixed solvent containing a monohalogenated hydrocarbon solvent and a non-halogenated hydrocarbon solvent the monohalogenated hydrocarbon solvent containing a primary monohalogenated hydrocarbon having three to eight carbon atoms and/or a secondary monohalogenated hydrocarbon having three to eight carbon atoms, the non-halogenated hydrocarbon solvent containing an aliphatic hydrocarbon and/or an aromatic hydrocarbon.

Abstract: Structurally isomeric poly(alkyl ethylenes) with H and Y structures, polymeric bridging segments and a Y index of 2×10−3 to 8×10−3 (kJ/mole/degree), have decreased instability in the melt and more advantageous processing properties. The structurally isomeric poly(alkyl ethylenes) with H and Y structures are synthesized by an irradiating method, a melt reaction method or a solid phase reaction method by reacting poly(alkyl ethylenes) with 0.05 to 5% by weight of monofunctional, difunctional and polyfunctional monomers, optionally in the presence of peroxides. The structurally isomeric poly(alkyl ethylenes) are suitable for producing films, sheets, panels, coatings, pipes, hollow objects and foams.

Abstract: A process for preparing microgel(s) that uses a wide range of activatable prepolymers; in the process, a polymer composition of crosslinked component A and soluble components B and C is formed from mono-olefinic and multi-olefinic monomers in the presence of catalyst and initiator; the process comprises: I) introducing mono-olefinic monomer, catalyst, and initiator into a reactor in the absence of multi-olefinic monomer and producing an activatable prepolymer, component B; II) contacting the product of I) with multi-olefinic monomer to produce components A and C, optionally in the presence of additional initiator; also optionally in the presence of additional mono-olefinic monomer and initiator; the ratio of components A/(B+C) can be controlled by varying the mole ratio of Component B/ multi-olefinic monomer from 0.05/1 up to 5/1, by decreasing the mole ratio to increase the ratio of A/(B+C), and increasing the mole ratio to decrease the ratio of A/(B+C).

Abstract: A thermoplastic elastomer produced without a hydrogenation step is functionalized utilizing a free radical initiator and a functionalizing monomer having at least one point of unsaturation. The base polymers can be produced by copolymerizing an &agr;-olefin capable of producing an amorphous backbone with a comonomer which provides a “hook” for grafting to with a living polystyrene chain. Another method is to copolymerize an &agr;-olefin monomer system capable of producing an amorphous backbone with a comonomer containing a functional group from which an anionically polymerizable monomer is grown from the backbone. A third method involves copolymerizing an &agr;-olefin monomer system capable of giving an amorphous backbone with an olefin-terminated polystyrene comonomer. In a less preferred embodiment, a conventional EPDM polymer can be metallated and a monoalkenyl aromatic compound anionically polymerizable monomer grown from the backbone.

Abstract: The invention relates to water-soluble block copolymers comprising at least one block of hydrophobic nature and at least one block of hydrophilic nature, the block of hydrophobic nature exhibiting hydrophilic units in an amount of between 33% and 99% by weight with respect to the total weight of the units of the hydrophobic block. These copolymers are preferably diblocks or triblocks and are prepared by a polymerization process referred to as a living or controlled. Control of their hydrophilic-lipophilic balance makes it possible to adjust their solubility in water and their self-association properties. These copolymers can be used in particular as adhesion agents or wetting agents.

Abstract: A thermoplastic elastomer produced without a hydrogenation step is functionalized utilizing a free radical initiator and a functionalizing monomer having at least one point of unsaturation. The base polymers can be produced by copolymerizing an &agr;-olefin capable of producing an amorphous backbone with a comonomer which provides a “hook” for grafting to with a living polystyrene chain. Another method is to copolymerize an &agr;-olefin monomer system capable of producing an amorphous backbone with a comonomer containing a functional group from which an anionically polymerizable monomer is grown from the backbone. A third method involves copolymerizing an &agr;-olefin monomer system capable of giving an amorphous backbone with an olefin-terminated polystyrene comonomer. In a less preferred embodiment a conventional EPDM polymer can be metallated and a monoalkenyl aromatic compound anionically polymerizable monomer grown from the backbone.

Abstract: Acrylic emulsions are obtained by carrying out a polymerization reaction of a first acrylic monomer dispersion, adding a second acrylic monomer dispersion, and carrying out a further polymerization reaction wherein the first acrylic monomer dispersion contains acrylic monomer and tackifier in a first proportion to acrylic monomer contained in the first acrylic monomer dispersion and wherein the second acrylic monomer dispersion contains acrylic monomer and tackifier in a second proportion to acrylic monomer contained in the second acrylic monomer dispersion, and wherein the proportion of tackifier in the first acrylic monomer dispersion is lower than the proportion of tackifier in the second acrylic monomer dispersion. A high molecular weight acrylic polymer is obtained when the first acrylic monomer dispersion is polymerization reacted. The second acrylic monomer dispersion is added to the first acrylic monomer dispersion after the first acrylic monomer dispersion is polymerization reacted.

Abstract: The dispersibility of the initial polystyrene block in forming a S-B-S type of copolymer is improved by first preparing a small block of homopolydiene such as homopolybutadiene as a dispersing agent. Onto this small block of homopolybutadiene, the first block of polystyrene is formed and affixed and thereby made dispersible in a mixture of alkanes and 15 to 60% by weight of cycloalkanes, preferably hexane and cyclohexane. After the preparation of the dispersing agent and the first styrene block, the remaining monomer charges to the reactor are fed in aliphatic hydrocarbon diluents, preferably hexane or technical hexane, thereby greatly reducing the final percentage of cycloalkanes including cyclohexane in the reactor to less than 25% of total dispersing medium. The block copolymers produced according to the present process display a narrow molecular weight distribution and improved tensile strength over block copolymers produced in the absence of the additional cycloalkanes in the solvent system.

Abstract: A block copolymer obtainable by reacting A) monomers selected from the group consisting of styrene, &agr;-methylstyrene, acrylonitrile, methacrylonitrile, methyl methacrylate and maleic anhydride to form blocks A having a glass transition temperature Tg of more than 0° C. and B) monomers selected from the group consisting of n-butyl acrylate, methyl acrylate and 2-ethylhexyl acrylate to form blocks B having a glass transition temperature Tg of less than 0° C. at from 100 to 160° C. in the presence of free-radical initiators and N-oxyl radicals.

Abstract: A method for the preparation of latexes with hollow polymer particles useful as opacifying agents. The process comprises the preparation of hollow polymer particle latex by emulsion copolymerization with water soluble initiator and anionic surfactant as follows: a) preparation of seed latex of copolymer containing methyl methacrylate and methacrylic acid; b) preparation of latex of highly carboxylated copolymer containing methyl methacrylate and a cross-linking agent and optionally a vinyl aromatic compound; c) using highly carboxylated latex synthesized at stage b) in the preparation of the intermediate shell comprising a copolymer of methyl methacrylate, acrylic acid ester, a cross-linking agent and optionally vinyl aromatic compound, said intermediate shell copolymer having a glass transition temperature below 80° C.

Abstract: The present invention relates to compositions of matter comprising a trifunctional aromatic core, said core having three arms radiating therefrom, wherein each of said arms is a diblock copolymer comprising an inner segment of polyisobutylene connected to a outer polymer segment obtained by a living radical polymerization process. The present invention also provides a process of preparing a composition of matter comprising the steps of: providing a trifunctional aromatic initiator core; reacting the trifunctional aromatic core with isobutylene to form a macroinitiator, said macroinitiator comprising polyisobutylene functionalized at the terminus of each said arm; conducting site transformation at the terminus of each arm to introduce a group capable of initiating living radical polymerization of outer segments at the terminus of each arm; performing living radical polymerization to form the outer polymer segments to produce a three arm star composition of matter having three diblock copolymer arms.

Abstract: The present invention provides resin compositions comprising a thermoplastic resin and at least one phosphoramide having a glass transition point of at least about 0° C., preferably of at least about 10° C., and most preferably of at least about 20° C., of the formula: wherein Q1 is oxygen or sulfur; R1 is an amine residue, and R2 and R3 are each independently an alkyloxy, alkylthio, aryloxy, or arylthio residue, or an aryloxy or arylthio residue containing at least one alkyl substitution; or an amine residue. The present invention also relates to articles made from the resin compositions. The present invention also provides methods to make the resin compositions having improved heat properties over compositions known in the art.

Abstract: The present invention provides a ring-opened polymer, which is prepared by reacting at least one pericyclic olefin elected from those represented by formulae (I) and (II) through ring-opening metathesis polymerization wherein A and B may be the same or different and are independently selected from the group consisting of halogen, hydrogen, C3-20 cyclic or pericyclic alkyl, C1-20 linear and branched alkyl, C6-20 aryl, C7-20 arylalkyl, C7-20 alkylaryl, silyl, alkylsilyl, germyl, alkylgermyl, alkoxycarbonyl, acyl, and a heterocylic group; or, A and B are linked together to form a C3-20 saturated or unsaturated cyclic hydrocarbon group or a substituted or unsubstituted heterocyclic group; C is selected from the group consisting of oxygen, sulfur,  —CH2—, and —SiH2—, wherein each R1 is independently selected from C1-20 alkyl and phenyl; each R is independently selected from hydrogen, halogen, and C1-20 alkyl; and each n is an integer from 1 to 6

Abstract: Provided is a method for producing an amphoteric resin which comprises reacting (1) a copolymerizable basic prepolymer A2 which is obtained by reacting a prepolymer A1 being obtained by polymerization of an amino group-containing &agr;, &bgr;-ethylenically polymerizable compound, other &agr;, &bgr;-ethylenically polymerizable compound and a polymerization initiator containing a carboxyl group at an end, with a compound having an epoxy group represented by the following formula (I): (wherein R1 represents H or a methyl group, and R represents a straight or branched chain alkyl group of 1-10 carbon atoms) in an amount of 0.1-1.0 equivalent for the amino group equivalent of the prepolymer A1 and (2) an &agr;, &bgr;-ethylenically polymerizable acidic prepolymer B2 which is obtained by carrying out the reaction in the same manner as above with (3) other &agr;, &bgr;-ethylenically polymerizable compound C.

Abstract: A block copolymer of a hydrophobic block of one or more hydrophobic monomers and a hydrophilic block of one or more hydrophilic monomers is prepared by polymerizing a hydrophobic monomer to prepare the hydrophobic block, using a free radical polymerization process using a stable free radical agent, preserving a stabilized active polymerization site on the hydrophobic block; adding a hydrophilic monomer to the stabilized active hydrophobic block; and further reacting the mixture to effect polymerization of the hydrophilic monomer. The polymerization of the hydrophilic monomer is conducted in an amidic solvent in which the hydrophobic block and the hydrophilic monomer are soluble.

Abstract: A thermoplastic elastomer produced without a hydrogenation step is functionalized utilizing a free radical initiator and a functionalizing monomer having at least one point of unsaturation. The base polymers can be produced by copolymerizing an .alpha.-olefin capable of producing an amorphous backbone with a comonomer which provides a "hook" for grafting to with a living polystyrene chain. Another method is to copolymerize an .alpha.-olefin monomer system capable of producing an amorphous backbone with a comonomer containing a functional group from which an anionically polymerizable monomer is grown from the backbone. A third method involves copolymerizing an .alpha.-olefin monomer system capable of giving an amorphous backbone with an olefin-terminated polystyrene comonomer. In a less preferred embodiment, a conventional EPDM polymer can be metallated and a monoalkenyl aromatic compound anionically polymerizable monomer grown from the backbone.

Abstract: A polymer having groups located at the ends of the polymer chain which groups are derived from stable free radical compounds, wherein the polymer is of the formula:SFR-(R)-SFRwherein SFR represents a covalently bonded stable free radical group and R represents a thermoplastic resin.

Abstract: Peroxidic compositions utilizable for curing elastomers and polyolefins having scorch retardant properties, which comprise:(A) a peroxide in powder or in the form of granules or master batch(B)+(C) inhibitor and promoter in powder, granules or master batch,wherein (B) is an inhibitor derived from hydroquinone and (C) is a curing promoter.

Abstract: Bisphosphoramidates such as N,N'-bis[di-(2,6-xylenoxy)phosphinyl]piperazine are effective flame retardant agents for thermoplastic polymers and blends thereof. In addition, the blends containing such bisphosphoramidates have excellent high temperature properties, as demonstrated by high heat deflection temperatures and a low tendency to decrease glass transition temperature.

Abstract: There are disclosed a gel or polymer composition which comprises 100 parts by weight of: a graft copolymer composition formed from the graft reaction of a maleate functionalized ethylene-alpha-olefin copolymer and a maleate functionalized polypropylene with an organic diamine grafting agent, and at least 30 parts by weight of an extender oil or a low molecular weight organic component. These gel compositions have super soft properties, heat resistance, and/or damping properties.

Abstract: Functionalized copolymers of .alpha.-olefin and para-alkylstyrene having the formula: ##STR1## in which in which R, R' and R", independently, are hydrogen or primary or secondary alkyl groups; X comprises a functional group, such as --COOH, --OH, --SH, --NH.sub.2, --Cl, --Br, --M, --COOM (M=metals, e.g. Li, Na, K and Ca) and anhydrides; P comprises a polymer having the molecular weight of at least about 500, which can be derived from both step and chain polymerization reactions; Y is a chemical linkage between polymer P and para-alkystyrene side chain, which is also a residue derived from graft reaction; and the combination of a+b+c+d represents the empirical formula of a substantially random functional polymer, where a ranges from about 50 to about 100,000, b, c and d range from 0 to about 10,000, and the sum of c+d is at least 1, and processes for preparing the funcitonalized copolymers are disclosed.

Abstract: The synthesis and characterization of novel linear polymers and multi-arm star polymers comprising polyisobutylene arms connected to a well-defined calixarene core are described. The polymers are directly telechelic. They synthesis has been achieved using the "core first" method wherein multifunctional calix?n!arene (where n=4 to 16) derivatives or their monofunctional analogues are used as initiators which, in conjunction with certain Freidel-Crafts acids as co-initiators, induce the living polymerization of isobutylene or a similar carbocationic polymerizable monomer. Novel initiators suitable for inducing the polymerization are also described.

Abstract: The present invention provides a novel halogen-free solvent system which can produce a good isobutylene polymer and can be easily reused. A novel process for the production of an isobutylene polymer is provided which comprises using a hydrocarbon solvent having a boiling point of not lower than 105.degree. C. and a melting point of not higher than -90.degree. C. Heretofore, a solvent system containing a halogenated hydrocarbon such as methylene chloride has been used for the production of an isobutylene polymer. However, such a solvent system has a great adverse effect on the environment. Therefore, a non-halogenated solvent is desirable. The present invention is characterized by the use of a hydrocarbon solvent as a reaction solvent. The resulting polymer has good properties. Further, compounds which are produced as by-products during the reaction can be easily removed, enabling the recycling of the solvent used. Thus, the production cost can be reduced.

Abstract: The synthesis and characterization of novel linear polymers and multi-arm star polymers comprising polyisobutylene arms connected to a well-defined calixarene core are described. The synthesis has been achieved using the "core first" method wherein multifunctional calix?n!arene (where n=4 to 16) derivatives or their monofunctional analogues are used as initiators which, in conjunction with certain Freidel-Crafts acids as co-initiators, induce the living polymerization of isobutylene or a similar carbocationic polymerizable monomer to form star polymers or block copolymers. Novel initiators suitable for inducing the polymerization are also described.

Abstract: The present invention provides a novel solvent which is capable of providing an excellent isobutylene polymer, little affects the environment, has a lower solubility in water than those of halogenated hydrocarbons having 1 or 2 carbon atoms and can be decomposed relatively easily. Namely, the present invention relates to: a process for producing an isobutylene polymer, which comprises performing a cationic polymerization reaction in a solvent containing primary and/or secondary monohalogenated hydrocarbon(s) having 3 to 8 carbon atoms, and an isobutylene polymer thus obtained; and a process for producing an isobutylene polymer having a vinyl group introduced into the terminal thereof, which comprises reacting the isobutylene polymer produced above with 1,9-decadiene or allyltrimethylsilane, and an isobutylene polymer thus obtained.

Abstract: An isobutylene-based polymer as a polymer of cationically polymerizable monomers principally composed of isobutylene or a combination of isobutylene and a styrene-series monomer, generates a molded article with outstanding properties, the isobutylene-based polymer characteristically satisfying the following provisions;1. the isobutylene-based polymer has a substantially continuos molecular weight distribution on a gel-permeation chromatogram;2. the molecular weight at the highest peak on a gel-permeation chromatogram is within a range of 10,000 to 500,000; and3. the length (a) of the elution time in the lower molecular region of the mountain from the highest peak and the length (b) of the elution time in the higher molecular region of the mountain from the highest peak on a gel-permeation chromatogram, satisfy the provision represented by the formula (b)/(a).gtoreq.1.3.

Abstract: A living free-radical polymerization process for preparing polymers from vinyl aromatic monomers comprising polymerizing the vinyl aromatic monomer in the presence of a difunctional nitroxyl initiator.

Abstract: The invention is a practical process for anionically synthesizing multiblock polymers containing a plurality of blocks formed from polar and/or non-polar monomers by using a cyclic organometallic compound initiator that comprises a divalent metal atom and an organic moiety contained in a ring, preferably a cycloorganomagnesium initiator. Activation of the ring metallic atom results in anionic polymerization of the monomers by addition into the initiator ring at the bonds between the metallic atom and its two adjacent carbon atoms, the metallic atom acting as a bridge between the two living ends of the propagating chain. The active chain ends can be coupled or terminated.

Abstract: A process for preparing hyperbranched polymers from AB monomers and C monomers Using a self-constructing approach is disclosed along with the hyperbranched polymers of a living-like character produced by such process.

Abstract: A method of preparing a water-soluble resin, which comprises the steps of: subjecting an aqueous solution of a first water-soluble ethylenically unsaturated monomer to a first-stage water-in-oil type of reverse-phase suspension polymerization using a water-soluble radical polymerization initiator in a hydrophobic organic solvent in the presence of an emulsifier and optionally a crosslinking agent, thereby forming a slurry containing hydrous polymer gel particles; adding to said slurry a nonionic or anionic surface active agent having an HLB of at least 7 and higher than that of said emulsifier and an aqueous solution of a second water-soluble ethylenically unsaturated monomer so as to absorb the aqueous solution of the second monomer in said hydrous polymer gel particles; and carrying out a second-stage polymerization of said second monomer.

Abstract: Multiple sequential chemical reactions on a polymeric feedstock are carried out in an extruder with multiple reaction zones. Each reaction zone has means for introduction of reagents, for mixing of reagents with polymer and for removal of by/co-products or unreacted reagents.

Abstract: There is a need for polymers which are utilized in automotive interiors which offer increased heat and ultraviolet light resistance. It is particularly critical for polymers which are utilized in making skin compounds for automotive instrument and door panels to display excellent heat and ultraviolet light resistance.

Abstract: An Improved Oxygen Scavenging Polymer containing unsaturated carbon-carbon bonds, functions as an antioxidant when the unsaturated carbon-carbon bonds are triggered by the presence of moisture, wherein the unsaturated polymer contains one or more alkyl, alkenyl, or alkynyl groups or combinations thereof, and the polymer is used in articles.

Abstract: Multiple sequential chemical reactions on a polymeric feedstock are carried out in an extruder with multiple reaction zones. Each reaction zone has means for introduction of reagents, for mixing of reagents with polymer and for removal of by/co-products or unreacted reagents.

Abstract: A one-step polymerization process for producing a bimodal resin having a distinct low molecular weight portion and a high molecular weight portion includes initiating an anionic polymerization of a monomer or monomers to produce living polymer chains, terminating a portion of the living polymer chains, and completing the polymerization of the remaining living polymer chains. The bimodal resin is useful, for example, in high gloss, low melt toner applications.

Abstract: Carboxyl-containing isobutene copolymers are obtainablea) by cationic polymerization of a mixture of from 1 to 99 mol % of isobutene and from 99 to 1 mol % of a 2-methylalk-1-ene at less than 20.degree. C. in the presence of a halogen-containing Lewis acid andb) subsequent grafting of the isobutene copolymer obtainable in this manner with an .alpha.,.beta.-ethylenically unsaturated carboxylic acid or carboxylic acid derivative at above 100.degree. C. and in the presence of a free radical initiator.Such carboxyl-containing isobutene copolymers are particularly suitable as adhesive raw materials or as sealing compounds.

Abstract: A graft copolymer dispersant (binder) having a weight average molecular weight of about 5,000-100,000 wherein: (1) the graft copolymer has a polymeric backbone formed by polymerizing ethylenically unsaturated monomers; (2) the graft copolymer has macromonomer side chains attached to the backbone at a single terminal point that have weight average molecular weights of about 1,000-30,000 and are formed from by polymerizing ethylenically unsaturated monomers in the presence of a cobalt chain transfer agent. The graft copolymer further contains about 2 to 70% by weight, based on the weight of the graft copolymer, of polymerized constituents having a phosphate moiety or phosphoric acid moleties that are polymerized into the backbone, the side chains, or both. The graft copolymer is neutralized with an inorganic base or an amine.

Abstract: A flowable uncured adhesive elastomeric composition suitable for delivery to assembly sites by pumping through supply lines is provided, which has a tensile strength suitable for formation of a strong bond, comprising: (a) an elastomer having a viscosity higher than flowable; (b) a synthetic resin curable by the same cure system as said non-flowable elastomer in an amount sufficient to lower the viscosity of the mixture to a pumpable level; (c) an unsaturated polymeric adduct of a dicarboxylic acid or dicarboxylic acid derivative in an amount sufficient to provide adhesive properties to the mixture; and (d) a curing agent. Preferably the composition also comprises a crosslink-enhancing coagent in an amount sufficient to lower percent elongation and increase adhesive bond strength of the cured elastomer. The compositions are useful for bonding substrates such as other elastomers, metals, plastics, glass, fibers, paper and fabrics.