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Method for preparing barium sulfate for plastics and coatings

A barium sulfate and coating technology, applied in chemical instruments and methods, calcium/strontium/barium sulfate, coatings, etc., can solve the problems of product whiteness, gloss reduction, limited filler reinforcement effect, and many barium sulfate impurities , to reduce oil absorption value, facilitate dispersion, improve whiteness and gloss

Inactive Publication Date: 2020-09-25
NANNING XIAYANG CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The barium sulfate modified by this method still has some agglomeration phenomenon, and the compatibility of the filler with plastics and coatings is not good, the interface layer between the particles and the matrix is ​​weak, and the reinforcing effect of the filler is limited.
Secondly, the barium sulfate produced directly from ore has more impurities and lower whiteness. After filling with plastics and coatings, the whiteness and gloss of the product will decrease.

Method used

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  • Method for preparing barium sulfate for plastics and coatings

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing barium sulfate for plastics and coatings, is characterized in that: comprises the steps:

[0024] (1) Crush the barite to 1cm, add hot concentrated sulfuric acid with a mass ratio of 1:2 to dissolve, then add sodium diethyldithiocarbamate and ethylenediaminetetraacetic acid with a mass ratio of 2:1:4 Carry out impurity removal with the impurity removal agent that polyacrylamide is formed, the add-on of described impurity removal agent is 2.1% of barite quality, obtains barium sulfate slurry;

[0025] (2) Add the barium sulfate slurry to the surface modification machine, and then add kaolin, starch, melamine, succinate sulfonated hydrogenated castor oil and polyetherimide with a mass ratio of 8:3:2:1:1. The composite modifier is modified, and the addition of the composite modifier is 4.5%, to obtain modified barium sulfate slurry;

[0026] (3) Pass the modified barium sulfate slurry through a filter press, and then dry it through a pulse air dryer...

Embodiment 2

[0028] A method for preparing barium sulfate for plastics and coatings, is characterized in that: comprises the steps:

[0029] (1) Crush the barite to 0.25cm, add hot concentrated sulfuric acid with a mass ratio of 1:3 to dissolve, and then add sodium diethyldithiocarbamate and ethylenediaminetetracarbamate with a mass ratio of 3:1:5 The impurity removal agent that acetic acid and polyacrylamide is formed carries out impurity removal, and the add-on of described impurity removal agent is 3.6% of barite quality, obtains barium sulfate slurry;

[0030] (2) Add the barium sulfate slurry to the surface modification machine, and then add kaolin, starch, melamine, succinate sulfonated hydrogenated castor oil and polyetherimide with a mass ratio of 6:4:3:1:2 to form The composite modifier is modified, and the addition of the composite modifier is 4.0%, to obtain modified barium sulfate slurry;

[0031] (3) Pass the modified barium sulfate slurry through a filter press, and then dry...

Embodiment 3

[0033] A method for preparing barium sulfate for plastics and coatings, is characterized in that: comprises the steps:

[0034] (1) Crush the barite to 0.25cm, add hot concentrated sulfuric acid with a mass ratio of 1:3 to dissolve, and then add sodium diethyldithiocarbamate and ethylenediamine tetracarbamate with a mass ratio of 1:3:4 The impurity-removing agent that acetic acid and polyacrylamide is formed removes impurity, and the addition of described impurity-removing agent is 4.0% of barite quality, obtains barium sulfate slurry;

[0035] (2) Add the barium sulfate slurry to the surface modification machine, and then add kaolin, starch, melamine, succinate sulfonated hydrogenated castor oil and polyetherimide with a mass ratio of 5:4:1:0.5:2.5. The composite modifier is modified, and the add-on of described composite modifier is 3.9%, obtains modified barium sulfate slurry;

[0036] (3) Pass the modified barium sulfate slurry through a filter press, and then dry it thro...

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Abstract

The invention discloses a method for preparing barium sulfate for plastics and coatings, which comprises the following steps: pulverizing barite, adding hot concentrated sulfuric acid to dissolve, andadding an impurity removal reagent composed of sodium diethyldithiocarbamate, ethylenediamine tetraacetic acid and polyacrylamide to remove impurities, thereby obtaining barium sulfate slurry; addingthe barium sulfate slurry into a surface modifier, and then adding a compound modifier composed of kaolin, starch, melamine, succinate sulfonated hydrogenated castor oil and polyetherimide for modification to obtain modified barium sulfate slurry; and carrying out filter pressing by using a filter press, and drying, crushing and screening the treated material to obtain the barium sulfate powder for plastics and coatings. The barium sulfate powder prepared by the method disclosed by the invention has the advantages of high whiteness, high glossiness, good stability, good dispersity, low oil absorption value, good mechanical properties, good processability and the like, has good compatibility with plastics and coatings, and has good interface bonding force.

Description

technical field [0001] The invention relates to the technical field of preparing inorganic non-metallic minerals, in particular to a method for preparing barium sulfate for plastics and coatings. Background technique [0002] Due to its important structural properties such as quantum effect, size effect and surface effect, barium sulfate has become an important new high-grade functional filler in recent years. It not only has broad application prospects in many industrial fields such as rubber, plastics, inks, coatings, and papermaking, but also has broad application prospects in medicine, ceramics, cement, and composite materials. Domestic barium sulfate powder materials can be roughly divided into two categories: one is the barium-based powder obtained from high-quality natural ore-barite, crushed, sieved and moderate follow-up treatment, and its main technical index BaSO4 content is 80 ~92%, whiteness 85~94 degrees, particle size distribution 1~100μm, average particle si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/06C09C3/10C09C3/08C09C3/04C01F11/46C08K9/10C08K3/30C08L23/12C08J5/18C09D7/62
CPCC01F11/462C01P2006/19C01P2006/22C01P2006/60C08J5/18C08J2323/12C08K3/30C08K9/10C08K2003/3045C09C1/027C09C3/006C09C3/04C09C3/043C09C3/06C09C3/08C09C3/10C09D7/62
Inventor 韦明
Owner NANNING XIAYANG CHEM TECH CO LTD