Abstract: The invention provides a stabilising composition for polymeric materials comprising: at least one secondary arylamine having the formula I: wherein: the or each R, which may be the same or different, independently denotes an optionally substituted hydrocarbyl group having at least 5 carbon atoms; x and y are each independently from 0 to 5 provided that at least one of x and y is at least 1; and a phenolic antioxidant, the composition and/or the secondary arylamine being a liquid at ambient conditions substantially free from diphenylamine and/or from lower alkylated diphenylamine antioxidants.

Abstract: Polyolefin compositions prepared by processing a polyolefin resin and a mixture of a select hindered phenol and select liquid phosphite above the melting point of the polyolefin contain a higher amount of retained active phosphorus than when other common phosphites are used. The compositions, and films, fibers and other molded articles prepared from the compositions show improved stabilization against NOX discoloration and long term oxidation. The select liquid phosphite consists mainly of a mixture of triphenyl phosphite derivatives wherein the phenyl groups are substituted by different numbers of butyl and/or amyl substituents.

Abstract: Solid phosphite compositions comprising tris(4-t-alkylphenyl) phosphites and selected hydroxyalkyl amines exhibit surprising performance compared with other phosphite stabilizers in the stabilization of polymers, such as polyolefins and the like, particularly in the prevention of color formation during high temperature processing or when exposed to certain gasses during storage, e.g., “gas fading”.

Abstract: Solid phosphite compositions comprising tris(4-t-alkylphenyl)phosphites and selected hydroxyalkyl amines exhibit surprising performance compared with other phosphite stabilizers in the stabilization of polymers, such as polyolefins and the like, particularly in the prevention of color formation during high temperature processing or when exposed to certain gasses during storage, e.g., “gas fading”.

Abstract: Solid phosphite compositions comprising tris(4-t-alkylphenyl)phosphites and selected hydroxyalkyl amines exhibit surprising performance compared with other phosphite stabilizers in the stabilization of polymers, such as polyolefins and the like, particularly in the prevention of color formation during high temperature processing or when exposed to certain gasses during storage, e.g., “gas fading”.

Abstract: A polymer composition comprises a polymer matrix, a first fluorine-containing processing aid, and a second processing additive system that is substantially free of fluorine and that comprises: (a) a lubricant and (b) a surfactant.

Abstract: A polymer stabilizing composition comprising a sterically hindered phenol and a phosphite that provides low gel content and enhanced resistance to gas-fading. The stabilizer composition is particular useful for stabilizing polyethylene homopolymers and copolymers, such as linear low density polyethylenes produced from metallocene catalyst. The sterically hindered phenol is, for example, selected from the group consisting of 1,3,5-tris-(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanurate, 1,3,5-tris-(3,5-dicyclohexyl-4-hydroxybenzyl)isocyanurate, 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, 1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-Triazine-2,4,6-(1H,3H,5H)-trione, and 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene.

Abstract: A polymer stabilizing composition comprising a sterically hindered phenol and a phosphite that provides low gel content and enhanced resistance to gas-fading. The stabilizer composition is particular useful for stabilizing polyethylene homopolymers and copolymers, such as linear low density polyethylenes produced from metallocene catalyst. The sterically hindered phenol is selected from the group consisting of 1,3,5-tris-(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanurate, 1,3,5-tris-(3,5-dicyclohexyl-4-hydroxybenzyl)isocyanurate, 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate,1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-Triazine-2,4,6-(1H,3H,5H)-trione, and 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene. The phosphite preferably is a liquid phosphite composition comprising two or more alkylated aryl phosphites.

Abstract: A polymer composition comprises a polymer matrix, a first fluorine-containing processing aid, and a second processing additive system that is substantially free of fluorine and that comprises: (a) a lubricant and (b) a surfactant.

Abstract: A polymer stabilizing composition comprising a sterically hindered phenol and a phosphite that provides low gel content and enhanced resistance to gas-fading. The stabilizer composition is particular useful for stabilizing polyethylene homopolymers and copolymers, such as linear low density polyethylenes produced from metallocene catalyst. The sterically hindered phenol is, for example, selected from the group consisting of 1,3,5-tris-(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanurate, 1,3,5-tris-(3,5-dicyclohexyl-4-hydroxybenzyl)isocyanurate, 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, 1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-Triazine-2,4,6-(1H,3H,5H)-trione, and 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene.

Abstract: A composition and method for increasing the hydrolytic stability of a stabilizer composition comprising a first phosphite, a second phosphite, an optional phosphonite and an acid scavenger.

Abstract: Stabilized flame retardant polymer compositions containing a hydrated metal compound, e.g., a metal hydroxide, as a flame retardant, when added an effective stabilizing amount of an amine oxide, a hydroxyl amine or mixtures thereof, exhibit desirable physical characteristics of pure polymers due to the stabilizer additives, including excellent color stability, while attaining desirable fire-retardance standards. 4. The stabilized flame retardant composition of claim 3, wherein said polymer resin is one of a polypropylene, polyethylene, Polypropylene blends, e.g. thermoplastic olefin (TPO), thermoplastic elastomer (TPE).

Abstract: A polymer stabilizing composition comprising a sterically hindered phenol and a phosphite that provides low gel content and enhanced resistance to gas-fading. The stabilizer composition is particular useful for stabilizing polyethylene homopolymers and copolymers, such as linear low density polyethylenes produced from metallocene catalyst. The sterically hindered phenol is selected from the group consisting of 1,3,5-tris-(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanurate, 1,3,5-tris-(3,5-dicyclohexyl-4-hydroxybenzyl)isocyanurate, 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, 1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-Triazine-2,4,6-(1H,3H,5H)-trione, and 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene. The phosphite preferably is a liquid phosphite composition comprising two or more alkylated aryl phosphites.

Abstract: A method is disclosed for increasing the hydrolytic stability of a stabilizer selected from the group consisting of (A) a first phosphite of the structure: and (B) a first phosphonite of the structure: wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 are independently selected from the group consisting of hydrogen and alkyl, provided that at least one of R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 is alkyl, and n is 2; wherein said method comprises blending said stabilizer with (a) from about 1 to about 25 weight percent, based on the total weight of the resulting blend, of a second phosphite of the structure wherein R11, R12, R13, R14, and R15 are independently selected from the group consisting of hydrogen and alkyl, provided that at least one of R11, R12, R13, R14, and R15 is alkyl, and R16 and R17 are independently selected alkyl groups; and (b) from about 1 to about 10 weight percent, based on the total weight of the resulting blend, of an acid scavenger.

Abstract: Disclosed herein is a stabilized composition comprising: (A) a polymeric resin, and (B) a stabilizing amount of a phosphite of the structure wherein R1, R2, R3, and R4 are independently selected from the group consisting of alkyl moieties and substituted cycloalkyl moieties of the structure wherein R14, R15, R16, R17, and R18 are independently selected from the group consisting of hydrogen and hydrocarbyl, provided that at least one of R14, R15, R16, R17, and R18 is not hydrogen and that no more than one of R1, R2, and R3 is alkyl, R9 and R10 are independently selected from the group consisting of hydrogen and hydrocarbyl, and Ar is an aromatic moiety.

Abstract: Stabilized flame retardant polymer compositions containing a hydrated metal compound, e.g., a metal hydroxide, as a flame retardant, when added an effective stabilizing amount of an amine oxide, a hydroxyl amine or mixtures thereof, exhibit desirable physical characteristics of pure polymers due to the stabilizer additives, including excellent color stability, while attaining desirable fire-retardance standards.

Abstract: A process for the preparation of a neo diol phosphite stabilizer by a direct/solvent-less method, wherein a neoalkyl chlorophosphite is reacted directly with a mono- or di-substituted hydroxylated aromatic compound, for neo diol phosphite product having little or no odor is provided. Also provided are polymeric compositions comprising a stabilizing amount of a neo diol phosphite having low to no odor.

Abstract: Stabilized flame retardant polymer compositions containing a hydrated metal compound, e.g., a metal hydroxide, as a flame retardant, when added an effective stabilizing amount of an amine oxide, a hydroxyl amine or mixtures thereof, exhibit desirable physical characteristics of pure polymers due to the stabilizer additives, including excellent color stability, while attaining desirable fire-retardance standards.

Abstract: The present invention relates to a catalyst system for olefin polymerization and to a process for olefin polymerization. More particularly, the invention relates to a catalyst system for the preparation of ethylene-propylene-copolymers, optionally containing one or more diolefins, under slurry polymerization conditions using a vanadium-based catalyst system which contains a halogenated compound which acts as a catalyst activator.

Abstract: A process for production of an ethylene-propylene-diene-methylene (EPDM) tetrapolymer having long chain branching is described. The process comprises the step of polymerizing a monomer mixture comprising ethylene, propylene, a first diolefin monomer containing one polymerizable double bond (preferably ENB) and a second diolefin containing two polymerizable double bonds (preferably VNB) in the presence of a catalyst system. The catalyst system comprises: a catalyst comprising a compound containing vanadium +3 with the proviso that the compound does not comprise a halogen directly bound to the vanadium; a halogenated organoaluminum cocatalyst having a halogen to aluminum molar ratio in the range of from about 1 to about 2; and an activator. The branched polymer product of the present process exhibits a molecular weight distribution of less than about 3.5 and improved rheological properties and enhanced processability characteristics.