Abstract: The present invention relates to a superabsorbent polymer which has excellent initial absorbency and keeps water from flowing out under pressure even after passage of time. The superabsorbent polymer of the present invention is characterized by simultaneously optimizing centrifuge retention capacity (CRC), absorbency under pressure (AUP), liquid permeability (SFC), and gel strength within a predetermined range. The present invention can provide improved physical properties of a final diaper product and apply an ultra-thin technology to the diaper product.

Abstract: The invention provides a method for producing a modified conjugated diene (co)polymer, the method including comprising: a modification reaction step including causing an organic silane compound to react with a conjugated diene (co)polymer having an active site at the active site, the organic silane compound having a characteristic group for forming a silanol group through hydrolysis and, in the vicinity of the characteristic group, (i) a functional group which binds the organic silane compound to the conjugated diene (co)polymer via addition to or substitution at the active site and which promotes reaction between the silanol group and a reinforcing filler after the addition or substitution reaction, or (ii) a functional group which promotes reaction between the silanol group and a reinforcing filler, and a hydrolyzation step performed after the modification reaction step; a modified conjugated diene (co)polymer having, at a molecular end of the conjugated diene (co)polymer, a silanol group, and a functional

Abstract: The method consists of a polymerization process or a copolymerization process which is carried out in two parallel reactors, and each of dienes are polymerized or copolymerized with each other and/or with arylvinyl compounds, wherein an organolithium initiator, an electron donor additive and a branching agent are fed into the first reactor, and an organo lithium initiator, an electron donor additive and a functionalizing agent are fed into the second reactor, and the resultant polymerized mixtures are subsequently mixed with each other. This method allows for producing branched functionalized (co)polymers of dienes that are characterized by a statistical distribution of monomer units, a high content of vinyl units (1,2-butadiene units and/or 3,4-isoprene units (more than 60%)), a narrow molecular weight distribution and a controllable content of branched and functionalized parts in the (co)polymer.

Abstract: Disclosed is an acrylate based adhesive composition for optical use that includes: a copolymer prepared by polymerizing an alkyl (meth)acrylate (wherein the alkyl is a C16 to C22 linear alkyl group) in an amount of about 1 to about 10 parts by weight, an alkyl (meth)acrylate (wherein the alkyl is a C1 to C12 alkyl group) in an amount of about 70 to about 98 parts by weight, and a polar monomer in an amount of about 1 to about 20 parts by weight; and a cross-linking agent. The cross-linking agent is included in an amount of about 0.5 to 5 parts by weight based on 100 parts by weight of the copolymer.

Abstract: The present invention relates to polymers functionalized by terminal groups, where these have, at the chain end, a silane-containing carbinol group of the formula (I) where R1, R2, R3, R4 are identical or different and are H, alkyl moieties, cycloalkyl moieties, aryl moieties, alkaryl moieties and aralkyl moieties, where these can comprise heteroatoms such as O, N, S, Si, A is a divalent organic moiety which can comprise, alongside C and H, heteroatoms such as O, N, S, Si.

Abstract: An object of the present invention is to provide a process for producing a modified conjugated diene-based polymer suitable for preparing a polymer composition excellent in the fuel cost saving effect. The present invention provides a process for producing a modified conjugated diene-based polymer, comprising reacting a conjugated diene-based polymer having a monomer unit based on a conjugated diene compound and a monomer unit based on a compound represented by the following formula (1), with an organometallic compound, and reacting the resulting reaction product with a hydrocarbyloxysilane compound: wherein R11, R12, R13, R14 and R15 each represent a hydrogen atom or an alkyl group, at least one of R11, R12, R13, R14 and R15 is an alkyl group, R16, R17 and R18 each represent a hydrogen atom or a hydrocarbyl group, R19 represents a hydrocarbylene group, and k represents 0 or 1.

Abstract: Improved methods for preparing sulfonated block polymers with acyl sulfates in non-halogenated aliphatic solvents are provided. The methods include the sulfonation of a precursor block polymer with an acyl sulfate in a reaction mixture further comprising at least one non-halogenated aliphatic solvent to form a sulfonated block polymer, wherein the initial concentration of the precursor block polymer is in the range of from about 0.1 wt % to a concentration that is below the limiting concentration of the precursor block polymer based on the total weight of the reaction mixture. A sulfonation degree of greater than about 1.0 milliequivalent sulfonic acid per gram sulfonated block polymer can be achieved substantially free of polymer precipitation and free of disabling gelation.

Abstract: Phosphazenium-based ionomers and methods of making them are disclosed. The ionomers are useful in making membranes for fuel cells and other devices that benefit from extremely base-stable membranes. The polymers (ionomers) contain repeating units of formula: in which all of R1, R2, W, Y and Z are hydrocarbon.

Abstract: In accordance with the present disclosure, there is provided a solid state graft copolymerization process for the preparation of disentangled ultrahigh molecular weight polyethylene graft copolymers in which disentangled ultrahigh molecular weight polyethylene is admixed with at least one functional monomer and a free radical initiator to obtain a mixture; and the mixture thus obtained is subjected to solid state polymerization to obtain a graft copolymer of disentangled ultrahigh molecular weight polyethylene. The graft copolymers of disentangled ultrahigh molecular weight polyethylene shows better crystallization temperature that ranges between 117° C. to 121° C. and improved decomposition temperature (T100) that ranges between 460° C. to 480° C.

Abstract: In an example, a process of forming a polymeric material is disclosed. The process may include chemically reacting a polyvinyl chloride (PVC) material with a diamine to form a diamine-modified PVC material. The diamine has a chemical formula (CH2)x(NH2)2, where x is not less than 2. The process may also include chemically reacting a halogenated phthalate plasticizer with the diamine-modified PVC material to form a polymeric material having a phthalate plasticizer covalently bonded to a polymer chain.

Abstract: Disclosed is a polymer comprising a repeating unit represented by Chemical Formula 1, or a polymer comprising a repeating unit represented by Chemical Formula 2: wherein R1, R2, x and y are as defined herein.

Abstract: A process for producing an isobutene copolymer derivative by: (I) free-radically copolymerizing (a) 10-90 mol % of a monoethylenically unsaturated C4- to C12-dicarboxylic acid, anhydride, or ester, (b) 10-90 mol % of a high-reactivity isobutene polymer having Mn=110-250000 and obtained by polymerizing isobutene in the presence of an iron-halide-, aluminum trihalide-, or alkylaluminum halide-donor complex, each donor being an ether or carboxylic ester function, or in the presence of a Lewis acid complex containing an organic sulfonic acid, and (c) 0-50 mol % of a monoethylenically unsaturated compound copolymerizable with (a) and (b), to obtain an intermediate isobutene copolymer; and (II) reacting the carboxylic acid functions in the intermediate with at least one of ammonia, an amine, and an alcohol, to form a moiety containing at least one of a hydroxyl, carboxylic ester, amino, quaternized amino, amido, and imido group.

Abstract: The invention is directed to a use of a polymer composition comprising an ethylene polymer for producing a crosslinked article, a process for producing a crosslinked article and to a crosslinked article comprising a crosslinked polymer composition which comprises a crosslinked ethylene polymer.

Abstract: The invention provides a composition comprising at least the following: A) interpolymer comprising, in polymerized form, ethylene, an ?-olefin and a nonconjugated polyene; B) sulfur; C) at least one phase transfer catalyst (PTC) selected from the group consisting of the following: as described herein; as described herein; as described herein; and D) at least one primary accelerator selected from the group consisting of the following: as described herein; as described herein; as described herein; as described herein; and combinations thereof.

Abstract: The present invention achieves increased filler interaction by incorporating a small amount (a few units per chain of rubbery polymer) of a conjugated triene monomer, such as alloocimene, randomly throughout the polymer chain of a rubbery polymer or at the chain ends of the rubbery polymer. The incorporation of the conjugated triene monomer leads to the formation of a polymer containing highly reactive conjugated diene units. These conjugated diene units can chemically react with carbon black leading to superior reinforcement. Alternatively, these conjugated diene units can be used for functionalization of the polymer with silica interactive/reactive groups using Diels Alder reactions. This functionalization of the rubbery polymer can conveniently be conducted in a mixer, such as a Banbury mixer, a mill mixer, or the like.

Abstract: A method for producing a modified conjugated diene polymer, comprises polymerizing (i) a monomer comprising a conjugated diene compound, or (ii) a monomer comprising a conjugated diene compound and an aromatic vinyl compound, in the presence of: at least one compound selected from the group consisting of formulae (1) and (2), and an alkali metal compound or an alkaline earth metal compound. A1 is a functional group which has a hydrocarbylsilyl group in which three hydrogen atoms in a —SiH3 structure are each substituted by a hydrocarbyl group; has at least one atom selected from the group consisting of N, P and S; and has no active hydrogen and is bound to R1 by any one atom of the N, P and S. R1 and R2 are hydrocarbylene groups.

Abstract: A process for producing rubber modified polymers having an increased rubber phase volume, including feeding a vinyl aromatic monomer and an elastomer to a polymerization reactor to form a reaction mixture, polymerizing the reaction mixture, combining a copolymer to the polymerized reaction mixture to form a combined mixture, subjecting the combined mixture to further polymerization, and obtaining a rubber modified polymer product from the further polymerization.

Abstract: A method for producing a polydiene, the method comprising the steps of: (i) forming an active catalyst by combining a lanthanide-containing compound, an alkylating agent, and a halogen source in the substantial absence of a sulfone, a sulfoxide, and a phosphine oxide; and (ii) polymerizing conjugated diene monomer in the presence of the active catalyst and a polymerization modulator selected from the group consisting of a sulfone, a sulfoxide, and a phosphine oxide.

Abstract: The present technology provides a modified polymer which is modified with two or more types of nitrones that include a nitrone having at least one carboxy group and a nitrone having no carboxy group.

Abstract: A curable resin including a repeating unit of hydroxystyrene substituted with an alkoxymethyl group, the repeating unit represented by the following general formula (1): where Ra represents a hydrogen atom or a methyl group; Rb represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; m is 1 to 3; and n is 1 to 3.