发明名称 Polypropylene articles and method for preparing same
摘要 Polypropylene articles are provided. The polypropylene articles comprise non-crystalline mesomorphous polypropylene having olefinic unsaturation-containing monomers graft-polymerized thereon by ionizing radiation in a dosage sufficient to degrade crystalline polypropylene. The irradiated polypropylene articles retain useful tensile properties after storage periods of as long as at least about four months. Further provided is a method for preparing irradiated polypropylene articles having olefinic unsaturation-containing monomers graft-polymerized thereon comprising the steps of melt extruding polypropylene; quenching the extruded polypropylene immediately after extrusion to provide non-crystalline mesomorphous polypropylene; coating the non-crystalline mesomorphous polypropylene with an ionizing radiation graft-polymerizable monomer; and irradiating the coated non-crystalline mesomorphous polypropylene with a dosage of ionizing radiation sufficient to degrade crystalline polypropylene and sufficient to effect graft-polymerization of the monomer onto the surface of the polypropylene.
申请公布号 US4950549(A) 申请公布日期 1990.08.21
申请号 US19890326409 申请日期 1989.03.20
申请人 MINNESOTA MINING AND MANUFACTURING COMPANY 发明人 ROLANDO, RICHARD J.;KRUEGER, DENNIS L.;MEYER, DANIEL E.;INSLEY, THOMAS I.
分类号 C08J7/18;D04H1/56 主分类号 C08J7/18
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