Carrier catalyst for producing wear-resistant flame-retardant polyethylene as well as preparation method and application of carrier catalyst

A flame-retardant polyethylene and catalyst technology, which is applied in the production of carrier catalysts for wear-resistant and flame-retardant polyethylene and its preparation, can solve the problem of the lack of registration, the lack of obvious advantages of nanomaterials, and the impact on the industrial application of polyolefin nanocomposites Foreground and other issues, to achieve the effect of large bulk density

Inactive Publication Date: 2015-04-29
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the purpose of previous research is mainly to use nanomaterials as catalyst carriers to give full play to their loading characteristics, and the advantages of nanomaterials in polyolefin materials are not obvious.
At the same time, few studies have focused on problems in the process of industrial application, such as the particle appearance of polyolefin composite materials. These problems affect the industrial application prospects of polyolefin nanocomposites and are key issues that need to be solved urgently. very few reports

Method used

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  • Carrier catalyst for producing wear-resistant flame-retardant polyethylene as well as preparation method and application of carrier catalyst
  • Carrier catalyst for producing wear-resistant flame-retardant polyethylene as well as preparation method and application of carrier catalyst
  • Carrier catalyst for producing wear-resistant flame-retardant polyethylene as well as preparation method and application of carrier catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0154] Preparation of Ziegler-Natta composite carrier catalyst system;

Embodiment 1a

[0156] Preparation of multi-dimensional polycrystalline silicate composite carrier catalyst:

[0157] Under the protection of nitrogen, add 4g of anhydrous magnesium chloride powder, 20ml of absolute ethanol and 50ml of n-heptane into a reaction flask with stirring, and stir at 100°C until the magnesium chloride is dissolved. Then add the following nanomaterials: 4g nano-montmorillonite (MMT) and 4g hydroxyl-modified attapulgite (ATTP) and fully stir for 2 hours. Then, the temperature was lowered to room temperature to obtain the nanocomposite MgCl2·ATTP·MMT·xETOH. Add a certain amount of TEA (Al / Mg=3) to the above system, react at 60°C for 2h, add 50ml n-heptane to wash 4 times to remove unreacted TEA, dry under vacuum to obtain good fluidity Carrier Mg-S.

[0158] Take the carrier Mg-S, add 50ml n-heptane and a certain amount of TiCl 4 , React at 60℃ for 2h, add 50ml n-heptane and wash 4 times to remove unreacted TiCl 4 , Dried under vacuum conditions to obtain a free-flowing s...

Embodiment 1b

[0162] The nano-carrier catalyst was prepared using the same method as in Example 1a, except that the nano-materials were changed to 4g nano-hydrotalcite and 4g pyroxene powder. The slurry polymerization was carried out according to the same procedure as in Example 2a. The calculated catalytic activity and the performance of the polyethylene resin tested according to the above test method are listed in Table 1.

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Abstract

The invention relates to a carrier catalyst for producing wear-resistant flame-retardant polyethylene as well as a preparation method and application of carrier catalyst. The carrier catalyst comprises silicate minerals with layered structures or modified products as a first component of a nanocarrier, silicate minerals with chain structures or modified products as a second component of the nanocarrier and a reactive chloride system or a reactive silicon oxide system as the third component of the nanocarrier. The preparation method comprises the following steps of compounding two components of the first component, the second component and the third component to form the nanocarrier; and loading a transition metal catalyst onto the nanocarrier to obtain the carrier catalyst. Since the silicate nanocarrier having multiple crystal structures exist in the carrier catalyst, the properties of a polyolefin composite material are synergistically enhanced, the mechanical properties of the polyethylene composite material is greatly improved, the polyethylene composite material exhibits the characteristics of excellent wear resistance, impact resistance, high pressure resistance and the like and can be used for producing high wear-resistant pipe and sheet, strong-barrier hollow containers, films and high pressure water pipes and the like.

Description

Technical field [0001] The invention relates to a composite carrier catalyst composed of multidimensional polycrystalline silicate, in particular to a carrier catalyst for producing wear-resistant flame-retardant polyethylene, and a preparation method and application thereof. Background technique [0002] Polyolefin is the polymer material with the largest output and the most versatile, and is an indispensable basic raw material for national life and modern defense. The emergence of nanotechnology has provided a broad space for the performance improvement of polyolefin materials. In nanocomposites, because the nano-sized inorganic dispersed phase is uniformly dispersed in the polymer, there are nano-size effects, super-large specific surface area, and strong interface interaction. Its performance is often significantly better than that of conventional composite materials with the same composition. It has the advantages of high specific strength, strong designability, and good fat...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F10/06C08F4/02C08F210/16C08L23/04C08L23/10C08L23/08C08K3/34C08K3/16C08K3/36C08K9/04
CPCY02P20/52
Inventor张乐天奚媛媛叶晓峰肖明威
OwnerSHANGHAI RES INST OF CHEM IND