Surface modification method of kaolin

A surface modification and kaolin technology, applied in chemical instruments and methods, dyeing polymer organic compound treatment, inorganic pigment treatment, etc., can solve problems such as affecting the whiteness and mechanical properties of products, local agglomeration, and poor compatibility. , to achieve the effect of improving compatibility and binding force, reducing oil absorption value and good interface binding force

Inactive Publication Date: 2020-09-11
NANNING XIAYANG CHEM TECH CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The kaolin modification methods in the prior art mainly include three methods: coupling agent modification, adsorption modification and surface coating modification. These modifications still have partial agglomeration, poor compatibility, and affect the whiteness of the product. However, due to the problems of high strength and mechanical properties, it still cannot meet the requirements of high-performance coatings, plastics, and paper for kaolin fillers.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Surface modification method of kaolin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for surface modification of kaolin, comprising the steps of:

[0025] S1: Grind kaolin to 200 mesh, add water 5 times its mass to dissolve, and then add sodium diethyldithiocarbamate, ethylenediaminetetraacetic acid and polyacrylamide with a mass ratio of 2:3:5. The impurity reagent is stirred evenly, and the addition amount of the impurity removal reagent is 2.5% of the kaolin mass, left to stand for 12h, and filtered to obtain a kaolin slurry;

[0026] S2: Put the kaolin slurry into the ball mill, and then add a compound composed of talcum powder, urea, melamine, polyethylene glycol esterified lanolin and imidazoline type phosphate sodium salt with a mass ratio of 15:3:2:1:3. Mix modifier, the addition of described composite modifier is 6% of kaolin mass, and ball milling 30min under rotating speed is 300r / min carries out surface modification, obtains modified slurry;

[0027] S3: Transport the modified slurry to a filter press for dehydration, and then dry ...

Embodiment 2

[0029] A method for surface modification of kaolin, comprising the steps of:

[0030] S1: Grind kaolin to 325 mesh, add water 4 times its mass to dissolve, and then add sodium diethyldithiocarbamate, ethylenediaminetetraacetic acid and polyacrylamide with a mass ratio of 3:4:3. Stir the impurity reagent evenly, the addition of the impurity removal reagent is 3.0% of the kaolin mass, let it stand for 18h, and filter to obtain the kaolin slurry;

[0031] S2: Put the kaolin slurry into the ball mill, and then add a compound composed of talcum powder, urea, melamine, polyethylene glycol esterified lanolin and imidazoline type phosphate sodium salt with a mass ratio of 12:4:3:2:1. Compound modifier, the addition of described composite modifier is 4.4% of kaolin mass, and ball milling 20min under rotating speed is 500r / min carries out surface modification, obtains modified slurry;

[0032] S3: Transport the modified slurry to a filter press for dehydration, and then dry it with a p...

Embodiment 3

[0034] A method for surface modification of kaolin, comprising the steps of:

[0035] S1: Grind kaolin to 400 mesh, add 6 times its mass in water to dissolve, then add sodium diethyldithiocarbamate, ethylenediaminetetraacetic acid and polyacrylamide with a mass ratio of 2:5:5 The impurity reagent is stirred evenly, and the addition amount of the impurity removal reagent is 3.6% of the kaolin mass, left standing for 24h, and filtered to obtain the kaolin slurry;

[0036] S2: Put the kaolin slurry into the ball mill, and then add a compound composed of talcum powder, urea, melamine, polyethylene glycol esterified lanolin and imidazoline type phosphate sodium salt with a mass ratio of 10:3:2:2:1. Mix modifier, the addition amount of described compound modifier is 5.4% of kaolin quality, ball milling 30min under rotating speed is 500r / min carries out surface modification, obtains modified slurry;

[0037] S3: Transport the modified slurry to a filter press for dehydration, and th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a surface modification method of kaolin, which comprises the following steps: pulverizing kaolin, adding water to dissolve the kaolin, adding an impurity removal reagent composed of sodium diethyldithiocarbamate, ethylenediamine tetraacetic acid and polyacrylamide, uniformly stirring the mixture, carrying out standing treatment, and filtering the mixture to obtain kaolin slurry; adding the kaolin slurry into a ball mill, then adding a compound modifier composed of talcum powder, urea, melamine, polyethylene glycol esterified lanolin and imidazoline phosphate sodium salt, and carrying out ball milling for surface modification; and conveying the modified slurry to a filter press to dehydrate, and then drying and crushing the product to obtain the modified kaolin. Thekaolin obtained through surface modification by the method has very good sub-dispersibility and processability, has very good compatibility with organic fillers or fibers, has good interface bonding force, enables a product to have very good mechanical properties after being filled, and also has very good flame retardant property, improved whiteness and enhanced product stability.

Description

technical field [0001] The invention belongs to the technical field of modification of non-metallic mineral fillers, in particular to a surface modification method of kaolin. Background technique [0002] Kaolin is an important non-metallic mineral resource. Kaolin has high whiteness, soft texture, easy to disperse and suspend in water, good plasticity and cohesiveness, strong electrical insulation performance; good resistance to acid solubility, strong ion adsorption And ion exchange, and good sintering and high refractoriness and other properties. Therefore, kaolin is widely used as rubber filler, plastic filler, paint filler, paper filler, etc. to improve its chemical stability and mechanical properties. [0003] The color of kaolin is mainly related to the metal oxides or organic matter it contains. Generally, Fe2O3 is rose red and brownish yellow; 2+ It is light blue or light green; light brown if containing MnO2; light yellow, gray, blue, black and other colors if c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(China)
IPC IPC(8): C09C1/42C09C3/04C09C3/06C09C3/08C09C3/10
CPCC09C1/42C09C3/006C09C3/041C09C3/043C09C3/063C09C3/08C09C3/10
Inventor韦明
OwnerNANNING XIAYANG CHEM TECH CO LTD