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Preparation method of predispersed clay-aramid pulp flocculation masterbatch

A technology of aramid pulp and clay, applied in the field of high-performance polymer structural material manufacturing, can solve problems such as difficult dispersion, easy mutual entanglement, high electrostatic tendency, etc., achieve good compatibility and adhesion, and simplify preparation Process flow, reduce the effect of agglomeration tendency

Active Publication Date: 2015-08-19
JIAXING BEIHUA POLYMER ADDITIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the excellent physical and chemical properties of aramid pulp also lead to a key problem that restricts the large-scale application of aramid pulp in rubber products: due to the strong surface polarity of aramid pulp, large electrostatic tendency, ultra-fine fibers, and specific surface area Large, so that the ultrafine fibrils near the surface of the main fiber are easily entangled with each other and adsorbed on the main fiber, making it difficult to disperse in the rubber matrix
However, the dispersing solvent is an organic solvent, and it cannot ensure that the aramid pulp is fully dispersed

Method used

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  • Preparation method of predispersed clay-aramid pulp flocculation masterbatch
  • Preparation method of predispersed clay-aramid pulp flocculation masterbatch
  • Preparation method of predispersed clay-aramid pulp flocculation masterbatch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Weigh 40 parts by mass of aramid pulp, 6 parts by mass of montmorillonite, 1 part by mass of KH560 coupling agent, 1 part by mass of water-soluble epoxy resin, 50 parts by mass of natural latex (60% solid content), 50 parts by mass of flocculation 2 parts by mass of calcium chloride (configured as a 2% aqueous solution).

[0034] (2) Mix clay with deionized water, stir for 30 minutes at a dispersion speed of 100r / min, then add KH560 coupling agent and continue stirring for 30 minutes;

[0035] (3) Mix the clay suspension obtained in step (2) with aramid pulp, and pretreat it until the aramid pulp microfibers are fully stretched at a stirring speed of 200 / min in the water phase, and are flocculent without spherical lumps or reunion phenomenon, forming an effective isolation;

[0036] (4) Add water-soluble epoxy resin to the mixed solution obtained in step (3), and further stir until there is no agglomeration;

[0037] (5) After adding natural latex to the aramid pulp...

Embodiment 2

[0041] (1) Weigh 40 parts by mass of aramid pulp, 6 parts by mass of montmorillonite, 1 part by mass of KH550 coupling agent, 1 part by mass of benzopyridine latex, 50 parts by mass of natural latex (solid content 60%), and flocculant 2 parts by mass of concentrated sulfuric acid (configured as a 2% sulfuric acid solution).

[0042] (2) Mix clay with deionized water, stir for 30 minutes at a dispersion speed of 100 r / min, then add KH550 coupling agent and continue stirring for 30 minutes;

[0043] (3) Mix the clay suspension obtained in step (2) with aramid pulp, and pretreat it until the aramid pulp microfibers are fully stretched at a stirring speed of 200 / min in the water phase, and are flocculent without spherical lumps or reunion phenomenon, forming an effective isolation;

[0044] (4) Add styrene-butadiene pyridine latex to the mixed solution obtained in step (3), and further stir until there is no agglomeration;

[0045] (5) After adding natural latex to the aramid pu...

Embodiment 3

[0049] (1) Weigh 40 parts by mass of aramid pulp, 6 parts by mass of montmorillonite, 1 part by mass of KH560 coupling agent, 1 part by mass of water-soluble epoxy resin, 50 parts by mass of styrene-butadiene latex (solid content 60%), 2 parts by mass of flocculant calcium chloride (configured into 2% aqueous solution);

[0050] (2) Mix clay with deionized water, stir for 30 minutes at a dispersion speed of 100 r / min, then add KH560 coupling agent and continue stirring for 30 minutes;

[0051] (3) Mix the clay suspension obtained in step (2) with aramid pulp, and pretreat for 1 hour under the stirring speed of the water phase at 200 / min. Pimple or reunion phenomenon, forming an effective isolation;

[0052] (4) Add water-soluble epoxy resin to the mixture obtained in step (3), and stir at a dispersion speed of 200 / min until there is no agglomeration;

[0053] (5) After adding styrene-butadiene latex to the aramid pulp suspension system obtained in step (4), under stirring, t...

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Abstract

The invention discloses a preparation method of pre-dispersed clay-aramid pulp flocculation, and belongs to the field of high-performance polymer materials. According to the preparation method disclosed by the invention, an aramid pulp micro-fiber fully stretches to form effective isolation by using the high adsorption performance of an efficient coupling agent modified clay suspension system on the aramid pulp micro-fiber under a high-speed stirring effect, and simultaneously, a hydrophilic adhesive is added to endow the aramid pulp and the subsequently added rubber latex with better compatibility and adhesiveness. After the rubber latex is added into the modified clay-aramid pulp suspension system, rubber latex particles uniformly envelops the surface of the aramid pulp micro-fiber under a stirring effect, is subjected to demulsification coprecipitation and then cleaned and dried to obtain the coprecipitated masterbatch containing 40% of para aramid pulp. According to the preparation method disclosed by the invention, no organic solvent harmful to environment is used, the para aramid pulp is uniformly dispersed in the prepared pre-dispersed masterbatch without tangle, the masterbatch shares higher compatibility and adhesion with a rubber substrate and can be directly applied to enhancing systems for different rubber substrates, and the preparation method is simple in process, and quite low in cost.

Description

technical field [0001] The invention belongs to the technical field of manufacturing high-performance polymer structural materials. It relates to a preparation method of pre-dispersed clay-aramid pulp flocculation masterbatch, specifically relates to a method for preparing high-content aramid pulp by using a coupling agent to modify the clay suspension system to absorb aramid pulp microfibers The method of meal flocculation masterbatch. Background technique [0002] Aramid pulp (Aramid pulp) is a short fiber product formed by the fibrillation of the surface of aramid fibers. It has excellent properties such as high modulus, high strength, high temperature resistance, wear resistance, chemical corrosion resistance, and dimensional stability. This makes it widely used in non-asbestos friction sealing materials, high-performance insulating materials, honeycomb paper for engineering and new reinforcing additive materials, etc. However, as a new high-tech fiber, the application...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L7/02C08L9/08C08L77/10C08K9/06C08K3/34
Inventor 吴卫东许涛伍社毛张立群姚修祚宫志欣张元珂
Owner JIAXING BEIHUA POLYMER ADDITIVES
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