Provided are a polymer having ultraviolet absorption functionality and preparation method thereof; specifically, three monomers having different ultraviolet absorption bands are used for copolymerization, achieving a significant expansion of the ultraviolet absorption range and achieving the effect of full-band ultraviolet shielding. The obtained polymer film has strong visible light transmittance, fluorescence, easy processing, excellent stability, and remarkable ultraviolet shielding performance, and can be broadly applied in such areas as aviation, construction, agriculture, and optical devices.

A method can be used for manufacturing an ethylene-propylene-diene terpolymer for a fuel cell. A polymerization step includes subjecting an organic chelate compound forming a coordinate bond, a vanadium-based Ziegler-Natta catalyst, an organoaluminum compound, and ethylene, propylene, and diene monomers, together with a solvent, to polymerization in a reactor. A separation step includes recovering residual catalysts and unreacted monomers from the stream discharged from the reactor. An acquisition step includes recovering the solvent from the stream deprived of the residual catalysts and unreacted monomers to acquire the ethylene-propylene-diene terpolymer.

A method can be used for manufacturing an ethylene-propylene-diene terpolymer for a fuel cell. A polymerization step includes subjecting an organic chelate compound forming a coordinate bond, a vanadium-based Ziegler-Natta catalyst, an organoaluminum compound, and ethylene, propylene, and diene monomers, together with a solvent, to polymerization in a reactor. A separation step includes recovering residual catalysts and unreacted monomers from the stream discharged from the reactor. An acquisition step includes recovering the solvent from the stream deprived of the residual catalysts and unreacted monomers to acquire the ethylene-propylene-diene terpolymer.

Ultra-pure methyl vinyl ether-co-maleic anhydride (PMVE/MA) copolymers and the process to produce such ultra-pure polymers by removing trace impurities are provided. A process to provide an ultra-pure methyl vinyl ether-co-maleic anhydride material by solvent washing PMVE/MA copolymer with a solvent, comprises the steps of: (1) providing a solvent system in which impurities in the copolymer matrix are soluble and in which the PMVE/MA copolymer is not soluble, and wherein the solvent system does not react with the copolymer; (2) washing a dry powder or wet filter cake of PMVE/MA copolymer with the solvent system to efficiently and effectively extract trace impurities from the matrix; (3) filtering said copolymer from the solvent system; and (4) drying the subsequent wet filter cake of said copolymer to obtain an ultra-pure methyl vinyl ether-co-maleic anhydride copolymer.

Ultra-pure methyl vinyl ether-co-maleic anhydride (PMVE/MA) copolymers and the process to produce such ultra-pure polymers by removing trace impurities are provided. A process to provide an ultra-pure methyl vinyl ether-co-maleic anhydride material by solvent washing PMVE/MA copolymer with a solvent, comprises the steps of: (1) providing a solvent system in which impurities in the copolymer matrix are soluble and in which the PMVE/MA copolymer is not soluble, and wherein the solvent system does not react with the copolymer; (2) washing a dry powder or wet filter cake of PMVE/MA copolymer with the solvent system to efficiently and effectively extract trace impurities from the matrix; (3) filtering said copolymer from the solvent system; and (4) drying the subsequent wet filter cake of said copolymer to obtain an ultra-pure methyl vinyl ether-co-maleic anhydride copolymer.

The present invention relates to an ethylene/alpha-olefin copolymer having a high weight average molecular weight and narrow molecular weight distribution, and at the same time, a reduced characteristic relaxation time, thereby showing excellent physical properties, and a method for preparing the same.

A resin composition having improved volume resistance and excellent light transmittance may be prepared by using such ethylene/alpha-olefin copolymer. Accordingly, the ethylene/alpha-olefin copolymer may be utilized in various uses in electrical and electronic industrial fields.

The present invention relates to an ethylene/alpha-olefin copolymer having a high weight average molecular weight and narrow molecular weight distribution, and at the same time, a reduced characteristic relaxation time, thereby showing excellent physical properties, and a method for preparing the same.

A resin composition having improved volume resistance and excellent light transmittance may be prepared by using such ethylene/alpha-olefin copolymer. Accordingly, the ethylene/alpha-olefin copolymer may be utilized in various uses in electrical and electronic industrial fields.

A composition including a composite particle and a fluorine-containing polymer, wherein the composite particle comprises a polymer and an inorganic particle dispersed in the polymer, and the polymer contains an acid group-containing monomer unit. Also disclosed is a molded article obtained from the composition.

A composition including a composite particle and a fluorine-containing polymer, wherein the composite particle comprises a polymer and an inorganic particle dispersed in the polymer, and the polymer contains an acid group-containing monomer unit. Also disclosed is a molded article obtained from the composition.

This disclosure describes polymerization processes and processes for quenching polymerization reactions using reactive particulates, such as lecithin, as quenching agents, typically in solution or bulk polymerization processes.