ULTRA-HIGH-MOLECULAR WEIGHT POLYETHYLENE CROSSLINKED PRODUCT

PURPOSE:To obtain a crosslinked product with both high strength and modulus outstanding in heat resistance, solvent resistance and dimensional stability, by crosslinking an ultra-high-molecular weight polyethylene having double bond prepared by copolymerization between ethylele and diene compound in...

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Bibliographische Detailangaben
Hauptverfasser:	SANO AKIRA, KUROISHI TETSUJIRO, UEISHI HIROSHI, MATSUURA KAZUO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a crosslinked product with both high strength and modulus outstanding in heat resistance, solvent resistance and dimensional stability, by crosslinking an ultra-high-molecular weight polyethylene having double bond prepared by copolymerization between ethylele and diene compound in the presence of a specific catalyst under specified polymerization conditions. CONSTITUTION:In the presence of a catalytic system consisting of (A) a solid catalytic component containing essentially Mg, Ti, and/or V (e.g. prepared by carrying Ti and/or V compound on a Mg-contg. inorganic solid compound) and (B) an organometallic compound, a diene compound and ethylene are copolymerized so that the molar ratio of the diene compound to the ethylene falls >=0.5(pref. >=1.0) and the molar ratio of the Ti an/or V in said catalytic component to the diene compound falls >=1.5X10 (pref. >=2.0X10), thus obtaining an ultra-high molecular weight polyethylene with an intrinsic viscosity >=5 (pref. 0-30)dl/g in the form of a decalin solution at 135 deg.C. This crosslinking can be performed with a small quantity of organic peroxide or a low level irradiation of electron beams.