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Olefin Block Copolymer

A technology of olefin block and copolymer, which is applied in the field of olefin block copolymer, and can solve problems such as easy deterioration of processability

Active Publication Date: 2016-08-17
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Despite the above attempts, research on the commercialization of olefin-based elastomers with enhanced heat resistance has reached its limit
In addition, conventional block copolymer-type olefin-based elastomers are also limited in that processability is easily deteriorated during melt processing.

Method used

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  • Olefin Block Copolymer
  • Olefin Block Copolymer
  • Olefin Block Copolymer

Examples

Experimental program
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Embodiment Construction

[0018] Hereinafter, a detailed description will be given of the olefin block copolymer and the preparation method thereof according to the embodiment of the present specification. However, these embodiments are provided for illustration only and are not intended to limit the scope of the present invention. Furthermore, it is obvious to those skilled in the art that these embodiments can be modified in various ways.

[0019] Unless otherwise stated, some terms used throughout the specification may be defined as follows.

[0020] The term "(olefin) block copolymer" as used herein refers to a copolymer of ethylene or propylene and an alpha-olefin, wherein the copolymer comprises a plurality of blocks or segments of repeating units comprising For example, the content (weight fraction) of repeating units derived from ethylene (or propylene), the content (weight fraction) of repeating units derived from α-olefins, crystallinity, density or melting temperature of multiple blocks or ...

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Abstract

The present invention relates to an olefin block copolymer having excellent elasticity, heat resistance and processability. The olefin block copolymer comprises a plurality of blocks or segments each comprising ethylene or propylene repeating units and alpha-olefin repeating units in different weight fractions. In the olefin block copolymer, the number Y of short chain branches (SCB) per 1000 carbon atoms of each polymer chain contained in the block copolymer is relative to the number Y of the polymer chains The first derivative of the molecular weight X is a negative or positive number above -1.5 x 10-4; and, in the region corresponding to above the median molecular weight X, the first derivative is -1.0 x 10-4 to 1.0 ×10‑4.

Description

technical field [0001] The present invention relates to an olefin block copolymer. Background technique [0002] A block copolymer refers to a copolymer composed of a plurality of blocks or segments of repeating units having different properties from each other. It tends to have superior properties than conventional random copolymers or polymer blends. For example, block copolymers can contain both flexible elastomeric blocks (called "soft segments") and rigid crystalline blocks (called "hard segments") and thus possess favorable properties, such as excellent elasticity and resistance to hot sex. More specifically, such block copolymers are elastic at a temperature equal to or higher than the glass transition temperature of the soft segment and exhibit thermoplastic properties at a temperature higher than the melting temperature, so they can have relatively good resistance hot sex. [0003] Specific examples of such block copolymers, namely, SBS (styrene-butadiene-styren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F297/08C08F210/16C08L53/00C08L23/16
CPCC08F4/65908C08F4/6592C08F297/083C08F2410/01C08F210/16C08F4/65904C08F4/64044C08F210/14C08F2500/12C08F2500/08C08F2500/10C08F2500/03C08F297/08C08L23/16C08L53/00C08F301/00
Inventor 卢庆燮金元熙李暖莹全相珍安相恩
Owner LG CHEM LTD
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