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Ethylene/alpha-olefin polymer blends comprising components with differing ethylene contents

A technology for olefin polymers and blends, applied in the field of ethylene/α-olefin polymer blends, can solve the problems of low efficiency, narrow molecular weight distribution, and low film transparency of ethylene/α-olefin polymers.

Inactive Publication Date: 2010-01-20
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, films with a narrow molecular weight distribution (MWD), such as 2 or less, produced by ethylene / α-olefin polymers have good clarity, but are usually processed more similarly than those with a MWD of 3 or greater. Ethylene / α-olefin polymers are inefficient
However, ethylene / α-olefin polymers with a MWD of 3 or greater produce films that are less transparent than similar ethylene / α-olefin polymers with a MWD of 2 or less

Method used

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  • Ethylene/alpha-olefin polymer blends comprising components with differing ethylene contents
  • Ethylene/alpha-olefin polymer blends comprising components with differing ethylene contents

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Embodiment Construction

[0010] The ethylene / α-olefin blend component of the present invention is ethylene and at least one C 3 ~C 20 Polymers, ie, interpolymers, of alpha-olefin (preferably aliphatic alpha-olefin) comonomers and / or polyene comonomers such as conjugated dienes, non-conjugated dienes, trienes and the like. The term interpolymer includes copolymers, such as ethylene / propylene (EP), and terpolymers, such as EPDM (ethylene propylene terpolymer), but is not limited to polymers made from only ethylene and one or two monomers. C 3 ~C 20 Examples of alpha-olefins include propylene, 1-butene, 4-methyl-1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene ene, 1-hexadecene, 1-octadecene and 1-eicosene. Alpha-olefins may also contain ring structures such as cyclohexane or cyclopentane, resulting in alpha-olefins such as 3-cyclohexyl-1-propene (allyl-cyclohexane) and vinylcyclohexane . Although not alpha-olefins in the classical sense of the term, certain cyclic alkenes such as...

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Abstract

An ethylene / alpha -olefin polymer blend is described comprising first and second ethylene / a-olefin polymer components in which the ethylene content of the first component is at least 10 weight percent different than the ethylene content of the second component. These blends exhibit an improved combination of low temperature, pellet flow, compression set, melt strength and / or shape retention properties as compared to either component, or an ethylene / alpha -olefin polymer blend of similar composition but in which the ethylene content of each component is substantially the same.

Description

[0001] This application is a divisional application of the PCT application (WO2001 / 085838) that entered the Chinese national phase with the filing date of May 11, 2001 and the application number of 01809242.X. technical field [0002] This invention relates to ethylene / alpha-olefin polymer blends. One aspect of the invention relates to polymer blends comprising two or more ethylene / α-olefin components, while another aspect of the invention relates to such blends, one or more components of which comprise ethylene / α-olefin components. - Olefin / polyene polymers. Yet another aspect of the invention relates to polymer blends of ethylene / α-olefin components wherein the ethylene content of one component differs from the ethylene content of at least one other component by at least about 10 weight percent. Background technique [0003] Ethylene / α-olefin polymer blends are well known in the art. U.S.P.4,438,238;4,722,971;4,874,820;4,902,738;4,937,299;4,939,217;5,013,801;5,236,998;5,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08F297/00
Inventor M·K·劳内尔D·R·帕里克C·达尼埃尔M·S·埃德蒙森
Owner DOW GLOBAL TECH LLC