Quickly molded high density polyethylene composition and preparation method thereof

A high-density polyethylene and composition technology, applied in the field of polymer materials, can solve the problems of high price and high production cost, and achieve the effects of short crystallization time, fast forming speed, and easy forming and processing.

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composition uses a multimodal polyethylene composition to add a nucleating agent to achieve a faster crystallization rate, but the nucleating agent used is an organic nucleating agent, which is expensive and has high production costs

Method used

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  • Quickly molded high density polyethylene composition and preparation method thereof
  • Quickly molded high density polyethylene composition and preparation method thereof
  • Quickly molded high density polyethylene composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]The melt mass flow rate (21.6Kg) of polyethylene A is 9.5g / 10min, and the density is 0.945g / cm 3 ; The melt mass flow rate (21.6Kg) of polyethylene B is 2.1 g / 10min, and the density is 0.950g / cm 3 , the weight average molecular weight is 450,000, the comonomer is butene, and the molar ratio of butene to ethylene is 0.005.

[0036] The preparation method of the additive masterbatch is: adding absolute ethanol to the rare earth coupling agent for dilution, the mass ratio of the rare earth coupling agent and absolute ethanol is 1:5, stirring at high speed in a mixer for 3 minutes, and diluting the nano calcium carbonate and The rare earth coupling agent with a mass ratio of 100:6 was added to the high-speed mixer and mixed for 3 minutes, then the high-speed mixer was heated to 80°C~100°C and mixed for 5 minutes.

[0037] Mix superfine talcum powder and polyethylene wax with a mass ratio of 100:3 in a high-speed mixer for 5 minutes.

[0038] Mix low-density polyethylene, n...

Embodiment 2

[0041] The melt mass flow rate (21.6Kg) of polyethylene A is 8.5g / 10min, and the density is 0.947g / cm 3 ; The melt mass flow rate (21.6Kg) of polyethylene B is 2.3 g / 10min, and the density is 0.951g / cm 3 , the weight average molecular weight is 550,000, the comonomer is propylene, and the molar ratio of propylene to ethylene is 0.01.

[0042] The preparation method of the additive masterbatch is: adding acetone to the silane coupling agent for dilution, the mass ratio of the silane coupling agent to acetone is 1:3, stirring at high speed in a mixer for 1 min, and coupling the nano-calcium carbonate with the diluted silane The mass ratio of the agent is 100:4, add to the high-speed mixer and mix for 5 minutes, then heat the high-speed mixer to 80°C-100°C and mix for 5 minutes.

[0043] Mix superfine talcum powder and polyethylene wax with a mass ratio of 100:3 in a high-speed mixer for 10 minutes.

[0044] Mix low-density polyethylene, nano-calcium carbonate, and ultra-fine t...

Embodiment 3

[0047] The melt mass flow rate (21.6Kg) of polyethylene A is 10.0g / 10min, and the density is 0.943g / cm 3 ; The melt mass flow rate (21.6Kg) of polyethylene B is 2.5 g / 10min, and the density is 0.955g / cm 3 , the weight average molecular weight is 400,000, the comonomer is propylene, and the molar ratio of propylene to ethylene is 0.02.

[0048] The preparation method of the additive masterbatch is: add acetone to the titanate coupling agent to dilute, the mass ratio of the titanate coupling agent to acetone is 1:5, stir in a mixer at high speed for 1min, and dilute the nano-calcium carbonate and The titanate coupling agent in the mass ratio of 100:6 was added to the high-speed mixer and mixed for 5 minutes, and then the high-speed mixer was heated to 80°C-100°C and mixed for 3 minutes.

[0049] Mix superfine talcum powder and oxidized polyethylene wax with a mass ratio of 100:3 in a high-speed mixer for 3 minutes.

[0050] Mix low-density polyethylene, nano-calcium carbonate,...

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Abstract

The invention relates to a quickly molded high density polyethylene composition and a preparation method thereof and belongs to the technical field of macromolecular materials. The composition is characterized by being prepared from polyethylene A and polyethylene B with different densities and melt quality flow rates by adding an additive masterbatch to blend and granulate, wherein the composition is prepared from the following components in parts by weight: 75-90 parts of polyethylene A, preferably 80-85 parts, 10-25 parts of polyethylene B, preferably 15-20 parts, and 0.06-0.15 part of the additive masterbatch, and the additive masterbatch is a mixed extrudate of low density polyethylene, nano calcium carbonate and talc powder in a mass ratio of 3: 2: 1. During granulation, three groups of matching kneading blocks with different included angles are used to extrude and granulate at 210-220 DEG C. The composition provided by the invention is high in crystallization temperature and short in crystallization time, the product is fast in molding speed during production and good in dimensional stability, and the components are relatively low in price.

Description

technical field [0001] A rapid prototyping high-density polyethylene composition and a preparation method thereof belong to the technical field of polymer materials, and in particular relate to a hollow container and a polyethylene composition of profiled materials. Background technique [0002] High-density polyethylene (HDPE) is a highly crystalline, non-polar thermoplastic resin, widely used in hollow containers, pipes, films, wires and cables, sheets, profiles and other fields. No matter what field HDPE is used in and what kind of processing technology is used, it is a common goal to obtain products with excellent performance, increase the processing and molding speed of products, and improve production efficiency. [0003] Increasing the crystallization temperature and crystallization rate of HDPE can increase the molding rate of its products and improve production efficiency. The crystallization modification of HDPE is mainly through the addition of organic or inorgan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/16C08L23/08C08K9/04C08K3/26C08K3/34C08J3/22B29C47/92B29C48/92
CPCB29B9/06B29C48/402B29C48/505B29K2995/0041C08J3/226C08J2323/06C08J2423/06C08J2423/08C08K2201/011C08L23/06C08L2205/025C08L2205/035C08L2207/062C08L2207/066C08L23/0815C08K9/04C08K2003/265C08K9/08C08K3/34C08K9/06
Inventor 徐素兰张广明张超刘少成
Owner CHINA PETROLEUM & CHEM CORP
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