Pre-dispersed carbon black, and preparation method and application thereof
A pre-dispersed, carbon black technology, applied in chemical instruments and methods, dyed low-molecular-weight organic compounds, fibrous fillers, etc., can solve problems such as increasing the cost of plastic products, inability to disperse carbon black, and increasing operating steps, and achieve optimization. Production process, saving production steps, the effect of excellent dispersion properties
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Embodiment 1
[0022] The preparation of embodiment 1 predispersed carbon black
[0023] (1) Take 100g of carbon black (Cabot VULCANXC68 carbon black in the United States) and add it to 1L of mixed acid consisting of concentrated nitric acid (60% by mass fraction) and concentrated sulfuric acid (90% by mass fraction) with a volume ratio of 3:1 The solution was heated to reflux for 8 hours, then washed with water until neutral, and dried to obtain acid-treated carbon black;
[0024] (2) Disperse the acid-treated carbon black in 3L of toluene, then add 200g of diphenylmethane bismaleimide, 100g of dioctadecylamine and 50g of 4-dimethylaminopyridine, and carry out heating and reflux reaction for 5h , Take the precipitate, wash it with toluene and dry it to get the pre-dispersed carbon black.
Embodiment 2
[0025] The preparation of embodiment 2 predispersed carbon black
[0026] (1) Take 100g of carbon black (Cabot VULCANXC68 carbon black in the United States) and add it to 1.5L of a mixture of concentrated nitric acid (60% by mass fraction) and concentrated sulfuric acid (90% by mass fraction) with a volume ratio of 1:3. Heating to reflux in the acid solution for 5 hours, then washing with water until neutral, and drying to obtain acid-treated carbon black;
[0027] (2) Disperse the acid-treated carbon black in 4L of toluene, then add 300g of diphenylmethane bismaleimide, 200g of dioctadecylamine and 100g of 4-dimethylaminopyridine, and heat to reflux for 5h , Take the precipitate, wash it with toluene and dry it to get the pre-dispersed carbon black.
experiment example AB
[0048] Experimental example ABS spline conductive surface resistivity test
[0049]The pre-dispersed carbon black prepared in Examples 1, 2 and Comparative Examples 1 to 5 is mixed with ABS plastic (the brand of Korea LG Company is the ABS plastic of TR558A), wherein the pre-dispersed carbon black mass accounts for 5%, and the ABS The mass proportion of plastic is 95%; then extruded by a twin-screw extruder to make ABS test samples 1-7, the surface resistivity of the ABS test samples is tested according to the IEC60093 standard, and the test results are shown in Table 1.
[0050] Table 1. Surface Resistivity Tests
[0051] module Predispersed Carbon Black Type Surface resistivity (Ω / m 2 )
ABS test spline 1 Embodiment 1 pre-dispersed carbon black 1.4x10 4
ABS test spline 2 Embodiment 2 pre-dispersed carbon black 3.7x10 4
ABS test spline 3 Comparative example 1 pre-dispersed carbon black 4.4x10 6
ABS test spline 4 Comparat...
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