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Ethylene-based polymers and processes for the same

A polymer and ethylene technology, applied in the field of ethylene-based polymers and their preparation, can solve problems such as increasing melt strength

Inactive Publication Date: 2013-09-04
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional low density polyethylene (LDPE) has good processability, however, when used in film applications, increased melt strength is still required

Method used

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  • Ethylene-based polymers and processes for the same
  • Ethylene-based polymers and processes for the same
  • Ethylene-based polymers and processes for the same

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Embodiment Construction

[0017] As discussed above, in a first aspect, the present invention provides an ethylene-based polymer formed from at least ethylene and a "monomeric chain transfer agent (monomeric CTA)" comprising "copolymerization ends" and "chain transfer end".

[0018] In a second aspect, the present invention also provides an ethylene-based polymer comprising at least one structural unit selected from the group consisting of:

[0019] wherein R1 is selected from H or CH3. Here, the symbol Indicates a break at the center of a covalent bond between the indicated portion of a structural unit and that portion of the remaining chemical structure of the polymer.

[0020] Unless otherwise indicated, the following embodiments apply to both the first and second aspects of the present invention.

[0021] In one embodiment, the "monomeric chain transfer agent" in the first aspect is not a "non-conjugated diunsaturated monomer".

[0022] In one embodiment, the ethylene-based polymer comprises...

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Abstract

The invention provides an ethylene-based polymer formed from at least the following: ethylene and a ''monomeric chain transfer agent (monomeric CTA)'', comprising a ''copolymerization end'' and a ''chain transfer end''.

Description

[0001] References to related applications [0002] This application claims priority to US Provisional Application 61 / 408,124, filed October 29, 2010, which is hereby incorporated by reference in its entirety. Background technique [0003] Conventional low density polyethylene (LDPE) has good processability, however, when used in film applications, increased melt strength is still required. [0004] US Publication 2008 / 0242809 discloses a process for the preparation of copolymers of ethylene and comonomers, and wherein the polymerization is carried out in a tubular reactor at a peak temperature of 290°C to 350°C. The comonomer is a difunctional or higher functional (meth)acrylate, and the comonomer is used in an amount of 0.008 mole % to 0.200 mole %, relative to the amount of ethylene copolymer. [0005] International publication WO2007 / 110127 discloses extrusion coating compositions comprising ethylene copolymers. The ethylene copolymer is obtained by polymerization in a tu...

Claims

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Application Information

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IPC IPC(8): C08F210/02C08F2/38
CPCC08F210/02C08F220/283C08F2/38C08F220/00C08F210/16C08F210/06C08F110/02C08F2500/11C08F2500/12C08F110/06C08F2/00C08F10/02C08F26/02C08F26/08C08F28/04C08F220/28C08F220/50C08F28/02
Inventor J.O.奥斯比M.德米罗尔斯
Owner DOW GLOBAL TECH LLC
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