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A kind of preparation method of aromatic polyamide fiber rubber premixed masterbatch

An aromatic polyamide and fiber technology is applied in the field of preparation of an aromatic polyamide fiber-rubber premix masterbatch, and can solve the problems of poor abrasion resistance and tear resistance, complex composition and preparation method, and high cost of raw materials, Achieve the effect of accelerating the removal of solvent and moisture, reducing production costs, and reducing drying steps

Active Publication Date: 2019-04-19
中蓝晨光化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the complex composition and preparation method of the aromatic polyamide fiber rubber premixed masterbatch in the prior art, the high raw material cost and the use of the premixed masterbatch composed of existing raw materials to make the final rubber product wear-resistant and anti-friction. To solve the problem of poor tear performance, a method for preparing an aramid fiber rubber premix masterbatch is provided. In the preparation method of the aramid fiber rubber premix masterbatch, the aramid fiber slurry is pre-dispersed and mixed with The liquid rubber is mixed, and directly formed into granules by controlling the mixing and stirring conditions, omitting the screw granulation molding, the process is simple, the production cost is saved, and the production efficiency is improved.

Method used

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  • A kind of preparation method of aromatic polyamide fiber rubber premixed masterbatch
  • A kind of preparation method of aromatic polyamide fiber rubber premixed masterbatch
  • A kind of preparation method of aromatic polyamide fiber rubber premixed masterbatch

Examples

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Effect test

Embodiment 1

[0035] A kind of preparation method of aromatic polyamide fiber rubber premixed masterbatch, comprises the steps:

[0036] A. Raw material preparation: Weigh 20 parts of liquid rubber, 40 parts of aromatic polyamide fiber, and 80 parts of dispersing solvent by mass percent, and set aside, wherein the aromatic polyamide fiber includes aromatic polyamide pulp and aromatic polyamide pulp. Amide chopped fiber, the aromatic polyamide pulp is the pulp formed by beating and grinding aromatic polyamide chopped fiber in water through a beater;

[0037] B. Fiber pre-dispersion: adding the dispersing solvent weighed in step A to the aramid fiber to pre-disperse the fiber to obtain a fiber solvent premixing system;

[0038] C. Material mixing and granulation: mix the fiber solvent premixed system obtained in step B with the liquid rubber weighed in step A, and then gradually increase the temperature under vacuum conditions to remove the dispersion solvent and system moisture, see vacuum h...

Embodiment 2

[0044] The difference between this embodiment and Example 1 is that the raw material ratio of this embodiment is: 40 parts of liquid rubber, 70 parts of aramid fiber and 110 parts of solvent, except that the above raw material ratio is different from that of Example 1, this implementation Example and embodiment 1 also have the following differences:

[0045] In this embodiment, in step B, the fiber pre-dispersion is carried out under stirring conditions, the stirring speed is 600rpm, and the time is 15min. In step C, the gradient temperature rise to remove the dispersion solvent and the water in the system is to remove the dispersion solvent at 76-80°C, and remove the water in the system at 96-100°C. In this embodiment, the water content of the pulp is controlled to 65 %.

[0046] The polar liquid rubber used in this embodiment is liquid nitrile rubber; specifically, liquid nitrile rubber Nipol1312 is used. The dispersion solvent of the present embodiment adopts acetone;

Embodiment 3

[0048] The difference between this embodiment and Example 1 is that the ratio of raw materials in this embodiment is: 50 parts of liquid rubber, 80 parts of aromatic polyamide fibers, and 130 parts of dispersing solvent. Embodiment and embodiment 1 also have following difference:

[0049] In this embodiment, in step B, the fiber pre-dispersion is carried out under stirring conditions, the stirring speed is 700rpm, and the time is 10min. In step C, the gradient temperature rise to remove the dispersion solvent and the water in the system is to remove the dispersion solvent at 85-90°C, and remove the water in the system at 105-110°C. In this embodiment, the water content of the pulp is controlled to 70 %.

[0050] The liquid rubber in this embodiment is non-polar liquid rubber, and EPDM is used; specifically, Trilene 65 is used as liquid EPDM; the dispersion solvent is 120# solvent naphtha.

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Abstract

The invention provides a preparation method of an aromatic polyamide fiber and rubber premix master batch. The method comprises the following steps: 1, preparing raw materials: weighing 20-80 parts by mass of liquid rubber, 20-80 parts by mass of aromatic polyamide fibers and a dispersion solvent with the mass 1-2 times the total mass of the liquid rubber and the aromatic polyamide fibers; 2, adding the dispersion solvent weighed in step 1 to the aromatic polyamide fibers to pre-disperse the fibers in order to obtain a fiber solvent premix system; and 3, mixing the fiber solvent premix system obtained in step 2 with the liquid rubber, carrying out gradient heating under a vacuum pumping condition to remove the dispersion solvent and system water, and discharging the obtained material when the read value of a vacuum heating mixer pressure meter is stable and no liquid drops from a solvent condensation port in order to obtain the aromatic polyamide fiber and rubber premix master batch. The method has the advantages of simplicity in operation, low production cost, high efficiency, and effective improvement of the performances and the quality of rubber products produced from the aromatic polyamide fiber and rubber premix master batch.

Description

[0001] A kind of preparation method of aromatic polyamide fiber rubber premixed masterbatch technical field [0002] The invention belongs to the fields of high-performance macromolecule structural material manufacturing technology and rubber modification, and in particular relates to a method for preparing an aromatic polyamide fiber rubber premixed masterbatch. Background technique [0003] Aromatic polyamide chopped strands and pulp have always been concerned by the rubber industry for their excellent physical and chemical properties. After being added to the rubber matrix, the rubber masterbatch can improve the performance of the rubber, but its specific surface area is large and polar, and it is easy to generate static electricity. , which tends to cause the fibers to become tangled and difficult to disperse in the rubber matrix. The traditional method directly mixes aramid pulp and raw rubber. Aramid fiber is not easy to disperse evenly and the fiber itself is twisted ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/205C08J3/21C08L77/10C08L27/12C08L9/02C08L23/16C08L23/22C08L11/00C08L9/00C08L9/06
CPCC08J3/205C08J3/2053C08J3/21C08J2309/00C08J2309/02C08J2309/06C08J2323/22C08J2327/12C08J2377/10C08J2477/10C08L9/00C08L9/02C08L9/06C08L23/22C08L27/12C08L77/10C08L2205/025C08L2205/03C08L2205/16C08L23/16C08L11/00
Inventor 李兰英王凤德何鑫业林志娇
Owner 中蓝晨光化工有限公司
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