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Polyethylene compositions with improved optical properties

A polyethylene polymer, polyethylene technology, used in organic chemistry and other directions

Inactive Publication Date: 2020-04-21
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of clarifying agents in polyethylene resins and films is uncommon due to the much higher crystallization rate of polyethylene than polypropylene, making haze reduction and optical property improvement more challenging for polyethylene films and resins

Method used

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  • Polyethylene compositions with improved optical properties
  • Polyethylene compositions with improved optical properties
  • Polyethylene compositions with improved optical properties

Examples

Experimental program
Comparison scheme
Effect test

example

[0029] Part A: Preparation of bisamide nucleating agent

[0030] Exemplary bisamide structures and methods of preparation are listed below.

example 1

[0031] Example 1: The method for preparing N,N'-dicyclohexyl-1,4-phthalamide

[0032]

[0033] N-methylpyrrolidone (NMP) in CaH 2 It was stirred for 1 day and finally distilled off. Triethylamine was treated in a similar manner. Cyclohexylamine was stirred over KOH and distilled off. Under an inert atmosphere, 5.5 mL of cyclohexylamine, 0.1 g of anhydrous LiCl, and 25 mL of triethylamine were dissolved in 100 mL of anhydrous NMP. 4.06 g of terephthaloyl chloride was added to the solution and then stirred at 75° C. for 2 hours. The solution was then cooled to room temperature and poured into ice water. The precipitate was filtered off and washed several times with water. The crude product was recrystallized from DMF to yield 4.03 g of N,N'-dicyclohexyl-1,4-benzenedicarboxamide as a white powder.

example 2

[0034] Example 2: N,N'-bis(cyclohexylmethyl)-1,4-phthalamide

[0035]

[0036] make triethylamine in CaH 2 It was stirred for 1 day and finally distilled off. Make tetrahydrofuran (THF) in CaH 2 Refluxed for three days, distilled, refluxed for another three days over potassium and finally distilled again. Under an inert atmosphere, 3.75 mL of cyclohexanemethylamine, 0.1 g of anhydrous LiCl, and 15 mL of triethylamine were dissolved in 150 mL of anhydrous THF and cooled to 0°C. 2.66 g of terephthaloyl chloride were added to the solution and then refluxed for 12 hours. The solution was then cooled to room temperature and poured into ice water. The precipitate was filtered off and washed several times with water. The crude product was recrystallized from DMSO to yield 4.25 g of N,N'-bis(cyclohexylmethyl)-1,4-benzenedicarboxamide as white needles.

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Abstract

Embodiments of the polyethylene composition comprise at least 50 wt.% of at least one polyethylene polymer; and 0.001 to 2 wt.% of a bisamide nucleating agent for reducing of turbidity.

Description

[0001] Cross References to Related Applications [0002] This application hereby claims the benefit of EPO Patent Application No. 14382561.0 filed on December 23, 2014. technical field [0003] Embodiments of the present invention relate to polyethylene compositions, more particularly, polyethylene compositions having improved optical properties by including a bisamide nucleating agent. Background technique [0004] Polyethylene compositions and resins are used in a variety of applications and articles, such as for the production of shaped articles, blown films, and various other articles. Additives used to increase the rate of nucleation during crystallization of semi-crystalline polymers are called nucleators or nucleating agents. The addition of nucleating agents typically increases the overall crystallization rate and crystallization temperature of the polymer. This generally translates into faster curing and can be used to reduce cycle times for processes such as inj...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/20C08L23/08
CPCC08K5/20C08L2203/16C08L2201/10C08L2205/24C08L23/08C07C2601/16C07C2601/14C07C233/57C07C233/65C08J5/18C08J2323/06C08L23/06
Inventor M·K·希尔S·本萨松H-W·施密特P·史密斯S·阿克塞尔
Owner DOW GLOBAL TECH LLC