摘要:
Crosslinkable polyolefin compositions, articles prepared from such compositions, and processes for making such compositions are described that possess both good processability and fast cure rates. The crosslinkable polyolefin compositions are bidisperse blends of ethylene polymers of the same polymer family having differing number average molecular weights as obtained by deconvolution in which M.sub.n1 /M.sub.n2 >7, M.sub.n2 >3000 and 0.7.gtoreq.(A.sub.1 /(A.sub.1 +A.sub.2)).gtoreq.0.15 wherein M.sub.n1 represents the number average molecular weight of the first deconvoluted component, M.sub.n2 represents the number average molecular weight of the second deconvoluted component, and A.sub.1 and A.sub.2 are the relative proportions of the first and second components. These crosslinkable polyolefin compositions are useful for the manufacture of various articles, such as wire and cable coatings, weather-stripping and seals, gaskets, articles made from foamed and/or sponge-like crosslinked polyolefin or either closed or open cell structure and/or combinations thereof, hollow containers, hollow tanks, medical appliances, drapes and coverings, items of health and personal care, fibers, tapes, tubes, pipes and hoses, bellows, boots, gaiters, footwear, etc.
摘要:
The adhesion of polyolefin objects, in particular highly oriented polyethylene filaments, to, for instance, polar matrices is improved by oxidizing the surface of the objects and then treating it with a solution of a silane compound, a titanate or a chromium complex.
摘要:
The present invention relates to a flexible polyolefin composition, a sheet made therefrom, and a formed textured skin for applications such as interior furnishings of an automobile and a process to make such composition, sheet, and textured skin. Specifically said composition comprises an extrudable cross-linkable polyolefin composition comprising: (i) from 60 to 75 weight percent of one or more one silane cross-linkable polyolefin polymer; (ii) a moisture-cure condensation catalyst; and (iii) from 25 to 40 weight percent of one or more polyolefin polymer elastomer. Preferably an extruded sheet of said composition is formed into a textured skin, preferably by positive vacuum forming.
摘要:
A fuel reforming system, process, and device including a catalytic chamber and a heating chamber. The catalytic chamber, further including a fluid fuel intake and a gaseous fluid exit port and at least one heat exchanger for distributing heat between the heating chamber and the catalytic chamber. The catalytic chamber further including a screen member having a surface, wherein the member includes a catalytic deposit made from a combination of platinum and rhodium alloy. A catalytic conversion of converting liquid fuel to gaseous fuel occurs within the catalytic chamber. Fuel exits the fuel reforming device through a gaseous fluid exit port. In the process of phase change from liquid to gaseous phase, there is no change of chemical composition and C8H18 remains stable throughout, except for an increase in Enthalpy (heat content) per mol.
摘要:
Crosslinkable polyolefin compositions, articles prepared from such compositions, and processes for making such compositions are described that possess both good processability and fast cure rates. The crosslinkable polyolefin compositions are bidisperse blends of ethylene polymers of the same polymer family having differing number average molecular weights as obtained by deconvolution in which M.sub.n1 /M.sub.n2 >7, M.sub.n2 >3000 and 0.7.gtoreq.(A.sub.1 /(A.sub.1 +A.sub.2)).gtoreq.0.15 wherein M.sub.n1 represents the number average molecular weight of the first deconvoluted component, M.sub.n2 represents the number average molecular weight of the second deconvoluted component, and A.sub.1 and A.sub.2 are the relative proportions of the first and second components. These crosslinkable polyolefin compositions are useful for the manufacture of various articles, such as wire and cable coatings, weather-stripping and seals, gaskets, articles made from foamed and/or sponge-like crosslinked polyolefin or either closed or open cell structure and/or combinations thereof, hollow containers, hollow tanks, medical appliances, drapes and coverings, items of health and personal care, fibers, tapes, tubes, pipes and hoses, bellows, boots, gaiters, footwear, etc.
摘要:
Molded articles of silane-crosslinked blends comprising a polyolefin elastomer and a crystalline polyolefin polymer exhibit desirable tensile strength and/or compression set properties, and are prepared by (i) blending a low density polyolefin elastomer with a crystalline polyolefin polymer, (ii) grafting the blend with a silane crosslinker, (iii) shaping the silane-grafted blend into the molded article, and (iv) curing the shaped, silane-grafted blend with water, preferably in the presence of a cure catalyst.
摘要:
Highly-mineral-filled, halogen-free, flame-retardant compositions made from or containing a polypropylene thermoplastic elastomer, a polypropylene, a metal hydroxide filler, and a polar-monomer-grafted polyolefin elastomer compatibilizer. Such compositions can be employed in preparing various articles of manufacture, including extruded articles and coated conductors, such as cables.
摘要:
Compositions comprising at least 60 weight percent, based on the total weight of polymers, have at least one silane crosslinkable polyolefin resin and up to about 40 weight percent, based on the total weight of polymers, of at least one polyolefin elastomer resin, wherein the polyolefin polymer elastomer resin has density of less than or equal to about 0.89 g/cm3 and a melt index, I2, of less than about 50 g/10 mm. and which has been prepared using at least one metallocene catalyst provide improved flexibility, especially low temperature flexibility, while maintaining suitable cure performance and strength compared to the silane crosslinkable polymer resin alone. This composition may be used in cables for low temperature service applications.
摘要翻译:包含至少60重量%的基于聚合物的总重量的组合物具有至少一种硅烷可交联聚烯烃树脂和至多约40重量%(基于聚合物的总重量)至少一种聚烯烃弹性体树脂,其中 聚烯烃聚合物弹性体树脂的密度小于或等于约0.89g / cm 3,熔体指数I2小于约50g / 10mm。 并且使用至少一种金属茂催化剂制备,与单独的硅烷可交联聚合物树脂相比,提供了改善的柔性,特别是低温柔韧性,同时保持合适的固化性能和强度。 该组合物可用于低温服务应用的电缆。
摘要:
The adhesion of highly oriented polyolefin objects, in particular polyethylene filaments, to e.g. polar, polymer matrices is improved by contacting the surface of the object with a solvent for 0.5-2 minutes at a temperature above the dissolution temperature of the polyolefin.
摘要:
Compositions having at least 60 weight percent, based on the total weight of polymers, have at least one silane crosslinkable polyolefin resin and up to about 40 weight percent, based on the total weight of polymers, of at least one polyolefin elastomer resin, wherein the polyolefin polymer elastomer resin has density of less than or equal to about 0.89 g/cm3 and a melt index, I2, of less than about 50 g/10 mm. and which has been prepared using at least one metallocene catalyst provide improved flexibility, especially low temperature flexibility, while maintaining suitable cure performance and strength compared to the silane crosslinkable polymer resin alone. This composition may be used in cables for low temperature service applications.
摘要翻译:具有至少60重量%的基于聚合物总重量的组合物具有至少一种硅烷可交联聚烯烃树脂和至多约40重量%(基于聚合物的总重量)至少一种聚烯烃弹性体树脂,其中 聚烯烃聚合物弹性体树脂的密度小于或等于约0.89g / cm 3,熔体指数I2小于约50g / 10mm。 并且使用至少一种金属茂催化剂制备,与单独的硅烷可交联聚合物树脂相比,提供了改善的柔性,特别是低温柔韧性,同时保持合适的固化性能和强度。 该组合物可用于低温服务应用的电缆。