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High-content calcium silicate filling polyethylene master batch and preparation method thereof

A technology of calcium silicate and polyethylene, which is applied in the field of preparation of filler masterbatches, can solve the problems of limitations, easy loss and dispersion of low molecular weight coupling agents, and achieve the effects of stable quality, guaranteed performance, and suppressed loss

Inactive Publication Date: 2018-09-21
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is: to solve the problem that the low molecular weight coupling agent is easy to be lost and to improve the dispersibility, and to provide a preparation method of highly filled polyethylene masterbatch

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Weigh the carrier by weight fraction: low density polyethylene 24 powder, coupling agent: 0.6 part of γ-aminopropyltriethoxysilane, epoxy resin: 0.4 part, filler: calcium silicate additive is 75% of the total weight of carrier and additive;

[0015] (2) Add the weighed coupling agent to the calcium silicate powder, disperse in a high-speed disperser at 60°C for 2 hours, then add epoxy resin, continue mixing for 1 hour, and then mix the calcium silicate powder The body is placed in an oven at 100°C, and activated calcium silicate powder is obtained after drying;

[0016] (3) Feed the activated calcium silicate powder and low-density polyethylene into the conical twin-screw extruder. The temperature of the conical twin-screw extruder is controlled at 160-180°C and the speed is 400r / min. , and finally obtain the calcium silicate-filled low-density polyethylene masterbatch after extrusion, air cooling, and pelletizing.

example 2

[0018] (1) Weigh the carrier by weight fraction: low-density polyethylene 19 powder, coupling agent: 0.5 part of γ-aminopropyltriethoxysilane, epoxy resin: 0.5 part, filler: calcium silicate additive is 80% of the total weight of carrier and additive;

[0019] (2) Add the weighed coupling agent to the calcium silicate powder, disperse in a high-speed disperser at 60°C for 2 hours, then add epoxy resin, continue mixing for 1 hour, and then mix the calcium silicate powder The body is placed in an oven at 100°C, and activated calcium silicate powder is obtained after drying;

[0020] (3) Feed the activated calcium silicate powder and low-density polyethylene into the conical twin-screw extruder. The temperature of the conical twin-screw extruder is controlled at 160-180°C and the speed is 350r / min. , and finally obtain the calcium silicate-filled low-density polyethylene masterbatch after extrusion, air cooling, and pelletizing.

Embodiment 4

[0024] Compared with Example 2, the calcium silicate powder in Example 2 was replaced with calcium silicate powder not modified by a coupling agent, and the rest of the conditions were the same as in Example 2 to obtain a highly filled polyethylene masterbatch.

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Abstract

The invention discloses a high-content calcium silicate filling polyethylene master batch. The method is characterized by comprising the step that carriers comprising, by weight, 19-25 parts of low-density polyethylene, 0.3-0.7 part of coupling agent, 0.2-0.8 part of epoxy resin and filler, are weighed, wherein the filling amount of calcium silicate powder accounts for 75-80% of the total weight of the carriers and additives. The silane coupling agent is used for activating the calcium silicate powder, the loss of the low-molecular-weight silane coupling agent in the high-temperature processing process is inhibited by adding an epoxy resin protective agent, bubbles can be removed or reduced as much as possible, and the performance of the product is ensured; on the other hand, the additionof the epoxy resin can further improve the dispersion condition of the powder in a matrix, so that the interface effect between the powder and the matrix is improved while the calcium silicate fillingcontent is increased, and the mechanical property is improved.

Description

technical field [0001] The invention relates to a preparation method of filling master batches, in particular to a preparation method of high-content calcium silicate filling low-density polyethylene master batches. Background technique [0002] Polyethylene is one of the most widely used general-purpose plastics. The production of its plastic products is developing rapidly all over the world, and its application fields are also expanding. From daily life products to industrial and enterprise products, polyethylene plastic products can be seen everywhere. In order to improve and improve the performance of its plastic products, the method of adding filler masterbatch is generally used for modification. The specific operation is to add the powder into the polyethylene matrix to make masterbatch, and then dilute it into the product. This method can not only Realize functional modification, and at the same time greatly reduce material costs, and stand out in the increasingly fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L63/00C08K9/06C08K3/34C08J3/22
CPCC08J3/226C08J2323/06C08J2423/06C08K3/34C08K9/06
Inventor 张纯任粒刘伟罗源吴显
Owner GUIZHOU INST OF TECH
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