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Polypropylene for use in bopp applications

A polypropylene, propylene technology, applied in the field of polypropylene for BOPP applications, to achieve the effect of uniform film thickness

Active Publication Date: 2019-07-19
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, with the use of additives increasingly regulated, and efforts have been made to obtain cost-optimized methods, the use of (large amounts of) nucleating or clarifying agents for good processability, low haze and high stiffness is not expected

Method used

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  • Polypropylene for use in bopp applications
  • Polypropylene for use in bopp applications
  • Polypropylene for use in bopp applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Step A): Formation of Butyl Grignard

[0067] A 1.7 L stirred flask equipped with a reflux condenser and funnel was charged with magnesium powder (40.0 g, 1.65 mol). Place the flask under nitrogen. The magnesium was dried at 80° C. for 2 hours under a nitrogen purge, after which dibutyl ether (200 ml), iodine (0.05 g) and n-chlorobutane (10 ml) were added sequentially and stirred at 120 rpm. The temperature was maintained at 80°C and a mixture of n-chlorobutane (146ml) and dibutyl ether (1180ml) was added slowly over 3 hours. The reaction mixture was stirred at 80 °C for another 3 hours. Stirring and heating were then discontinued and a small amount of solid material was allowed to settle for 24 hours. By decanting the colorless solution above the precipitate, a butylmagnesium chloride solution having a concentration of 0.90 mol Mg / L was obtained.

[0068] Step B): Preparation of the first intermediate reaction product

[0069] A solution of the reaction product of...

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Abstract

The invention relates to a biaxially oriented polypropylene (BOPP) film comprising a propylene homopolymer or propylene-ethylene copolymer having an ethylene content of at most 1.0 wt% based on the propylene-ethylene copolymer having an Mw / Mn in the range from 5.0 to 12, wherein Mw stands for the weight average molecular weight and Mn stands for the number average weight and wherein Mw and Mn aremeasured according to ASTM D6474-12, an XS in the range from 1.0 to 6.0 wt%, wherein XS stands for the amount of xylene solubles which are measured according to ASTM D 5492-10, a melt flow rate in therange of 1 to 10 dg / min as measured according to IS01133 (2.16 kg / 230 DEG C) and a crystal size distribution as indicated by a height / width ratio of the highest peak of the first cooling curve of atleast 0.70 W / g DEG C as determined by ASTM D3418-08 using a heating and cooling rate of 10 DEG C / min.

Description

technical field [0001] The present invention relates to propylene homopolymers or propylene-ethylene copolymers, compositions comprising said propylene homopolymers or propylene-ethylene copolymers, articles comprising said propylene homopolymers or propylene-ethylene copolymers, preferably BOPP films , a method for producing said propylene homopolymer or a propylene-ethylene copolymer, a method for preparing said BOPP film and a use involving a propylene homopolymer or a propylene-ethylene copolymer for the preparation of an article, preferably a BOPP film . Background technique [0002] For many applications, biaxially oriented polymer films are desired. Biaxially oriented polymer films are typically prepared by heating an unoriented polymer film to a temperature at which the crystals partially melt and then stretching it into the desired shape. As the stretched film cools, it forms crystals and thereby locks the orientation into place. The properties of biaxially orien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/06C08F4/651C08F2/00C08J5/18
CPCC08F110/06C08J5/18C08F2/001C08F4/6546C08F4/6465C08F4/651C08F4/6565C08F2500/15C08F2500/26C08F2500/04C08F2500/12B29C55/005B29C55/12B29K2623/12C08F10/06C08F2800/20C08J2323/12C08J2323/16
Inventor P·E·L·沃特斯A·梅达德H·N·A·M·斯汀巴克斯-门汀A·摩曼
Owner SABIC GLOBAL TECH BV
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