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Propylene/alpha-olefin block interpolymers

A technology of olefin block and block copolymer, which is applied in the field of propylene/α-olefin block interpolymer, and can solve the problems of unrealized block copolymer.

Inactive Publication Date: 2011-02-23
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] Furthermore, there is an unfulfilled need for mesophase-separated block copolymers based on propylene and α-olefins

Method used

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  • Propylene/alpha-olefin block interpolymers
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  • Propylene/alpha-olefin block interpolymers

Examples

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Embodiment 2

[0310] Metallocene-catalyzed:

[0311] This example illustrates the calculation of composition values ​​for propylene-ethylene copolymers prepared using metallocene catalysts synthesized according to Example 15 of USP 5,616,664. A propylene-ethylene copolymer was made according to Example 1 of US Patent Application 2003 / 0204017. The propylene-ethylene copolymer was analyzed as follows. Use the corresponding to 100.4MHz 13 Data were collected with a Varian UNITY Plus 400 MHz NMR spectrometer at the C resonance frequency. Acquisition parameters were chosen to ensure quantitative 13 C data acquisition. Data were acquired using the following conditions: gated 1H decoupling, 4000 transients per number-average file, 7sec pulse repetition delay, spectral width of 24,200Hz and file size of 32K data points, with the probe tip heated to 130°C. Samples were prepared by adding approximately 3 mL of a 50 / 50 mixture of tetrachloroethane-d2 / o-dichlorobenzene (relaxation agent) at 0.025 ...

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Abstract

Embodiments of the invention provide a class of propylene / alpha-olefin block interpolymers. The propylene / alpha-olefin interpolymers are characterized by an average block index, ABI, which is greater than zero and up to about 1.0 and a molecular weight distribution, Mw / Mn, greater than about 1.3. Preferably, the block index is from about 0.2 to about 1. In addition or alternatively, the block propylene / alpha-olefin interpolymer is characterized by having at least one fraction obtained by Temperature Rising Elution Fractionation ('TREF'), wherein the fraction has a block index greater than about 0.3 and up to about 1.0 and the propylene / alpha-olefin interpolymer has a molecular weight distribution, Mw / Mn, greater than about 1.4.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application 61 / 024,674 (Attorney No. 66700), filed January 30, 2008. This application is also related to the following U.S. Provisional Patent Applications, also filed January 30, 2008: 61 / 024,688 (Attorney No. 66699), 61 / 024,674 (Attorney No. 65044), 61 / 024,698 (Attorney No. 66701); 61 / 024,701 (Agent No. 66702), and 61 / 024,705 (Agent No. 66703). For purposes of United States patent practice, the entire contents of these applications are hereby incorporated by reference into this application. technical field [0003] The present invention relates to propylene / alpha-olefin block interpolymers and articles made from the block interpolymers. Background technique [0004] Block copolymers contain sequences ("blocks") of the same monomeric unit covalently bonded to sequences of different types. The blocks can be connected in various ways, such as A-B diblock and A-B-A ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F297/08C08L53/00
CPCC08F297/083C08F297/08
Inventor 加里·马钱德张润华本杰明·普恩杰弗里·温霍尔德金·沃尔顿潘卡杰·古普塔科林·李皮尚菲利普·赫斯塔德罗杰·库尔曼埃德蒙·卡纳汉埃迪·加西亚-迈丁帕特里夏·罗伯茨
Owner DOW GLOBAL TECH LLC