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Palygorskite silane crosslinking agent preparation method and application of palygorskite silane crosslinking agent in low-density polyethylene crosslinking

A technology of silane crosslinking agent and silane, which is applied in the field of palygorskite clay crosslinking agent and its preparation, can solve the problems of unreported application and market circulation, so as to improve mechanical properties and gel content, reduce cost, The effect of good application prospects

Inactive Publication Date: 2013-09-11
兰州众邦电线电缆集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Palygorskite clay is a natural environment-friendly inorganic mineral. In recent years, it has been widely used in polymer materials, especially in the preparation of flame retardants. The application of the joint agent has not yet been reported and market circulation

Method used

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  • Palygorskite silane crosslinking agent preparation method and application of palygorskite silane crosslinking agent in low-density polyethylene crosslinking
  • Palygorskite silane crosslinking agent preparation method and application of palygorskite silane crosslinking agent in low-density polyethylene crosslinking
  • Palygorskite silane crosslinking agent preparation method and application of palygorskite silane crosslinking agent in low-density polyethylene crosslinking

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of palygorskite silane crosslinking agent

[0035] (1) Acid treatment of silane cross-linking agent: Add 1 mL of silane cross-linking agent to 5 mL of absolute ethanol, then adjust the pH to 3-3.5 with glacial acetic acid, and stir at room temperature for 1 h.

[0036] (2) Activation of palygorskite: Add 100g of palygorskite clay into 250mL NaOH solution with a mass fraction of 5%, stir magnetically at 45°C for 12h, then rinse the neutral with distilled water, centrifuge, and take the filter cake to dry, namely The activated palygorskite was obtained and ground for use.

[0037] (3) Preparation of palygorskite silane crosslinking agent:

[0038] Disperse 1 g of activated palygorskite in 10 mL of ethanol / water mixture (15 mL of ethanol, 1 mL of water), ultrasonically disperse for 15 min, and then add the above-mentioned treated silane crosslinking agent dropwise (wherein the net content of silane crosslinking agent is 0.005 g), add a certain amount of de...

Embodiment 2

[0043]1. Preparation of palygorskite silane crosslinking agent

[0044] (1) Acid treatment of silane cross-linking agent: Add 1 mL of silane cross-linking agent to 15 mL of absolute ethanol, then adjust the pH to 3-3.5 with glacial acetic acid, and stir at room temperature for 0.2 h.

[0045] (2) Activation of palygorskite: Add 100g of palygorskite clay into 250mL NaOH solution with a mass fraction of 10%, stir magnetically at 65°C for 48h, then rinse the neutral with distilled water, centrifuge, and take the filter cake to dry, namely The activated palygorskite was obtained and ground for use.

[0046] (3) Preparation of palygorskite silane crosslinking agent:

[0047] Disperse 1 g of activated palygorskite in 25 mL of ethanol / water mixture (25 mL of ethanol, 1 mL of water), ultrasonically disperse for 40 min, and then add the above-mentioned treated silane crosslinking agent dropwise (the net content of silane crosslinking agent is 0.05 g), add a certain amount of deionize...

Embodiment 3

[0052] 1. Preparation of palygorskite silane crosslinking agent

[0053] (1) Acid treatment of silane cross-linking agent: Add 1 mL of silane cross-linking agent to 10 mL of absolute ethanol, then adjust the pH to 3-3.5 with glacial acetic acid, and stir at room temperature for 0.5 h.

[0054] (2) Activation of palygorskite: Add 100g of palygorskite clay into 250mL NaOH solution with a mass fraction of 8%, stir magnetically at 55°C for 36h, then rinse the neutral with distilled water, centrifuge, and take the filter cake to dry, that is The activated palygorskite was obtained and ground for use.

[0055] (3) Preparation of palygorskite silane crosslinking agent:

[0056] Disperse 1 g of activated palygorskite in 20 mL of ethanol / water mixture (20 mL of ethanol, 1 mL of water), ultrasonically disperse for 35 min, and then add the above-mentioned treated silane crosslinking agent dropwise (the net content of silane crosslinking agent is 0.01 g), add a certain amount of deioniz...

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Abstract

The invention provides a palygorskite silane crosslinking agent preparation method and belongs to the field of high polymer materials. The method includes: dispersing activated palygorskite in an ethyl alcohol-water mixed solution, ultrasonic dispersing, adding an acidulated silane crosslinking agent, stirring, centrifuging, drying, conducting soxhlet extraction in a xylene solution, drying and grinding to obtain the palygorskite stem grafting silane crosslinking agent. Infrared absorption spectrum and scanning electron microscope analysis shows that the silane crosslinking agent is grafted on the surface of palygorskite clay, and a part of activated crosslinking group is reserved. Compared with vinyl trimethoxy silane of a common crosslinking agent of density polyethylene, under the condition of the same adding quantity and same processing technology, the palygorskite silane crosslinking agent is applied to crosslinking of the low-density polyethylene, and the mechanical property and gel content of the low-density polyethylene are improved. Meanwhile, combustion performance and thermal stability of a low-density polyethylene material are improved, the cost of the low-density polyethylene material is reduced, and the palygorskite silane crosslinking agent preparation method and the application have good application prospects.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a crosslinking agent used for polymer material modification, in particular to a palygorskite clay crosslinking agent and its preparation, which is mainly used in the crosslinking reaction of low-density polyethylene . Background technique [0002] Crosslinking agent refers to a substance that can transform monomers, linear polymers or prepolymers into a three-dimensional network structure under certain conditions to improve strength, heat resistance, abrasion resistance, solvent resistance and combustion resistance . It is mainly used for the preparation and modification of polymer materials. [0003] Cross-linking agents are mainly divided into external cross-linking agents and internal cross-linking agents. External linking agents are added before use, and then undergo crosslinking reactions at room temperature, heating or irradiation, mainly including polyisocyanates, polyami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K9/02C08K3/34C08K5/5425C08L23/06C08J3/24C08K13/06
Inventor 张哲魏博高淑玲赵帅马恒昌杨志旺周鹏鑫雷自强
Owner 兰州众邦电线电缆集团有限公司
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