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Method for modifying ultrafine light calcium carbonate and application of ultrafine light calcium carbonate in plastics

A technology of light calcium carbonate and nano calcium carbonate, applied in the direction of calcium carbonate/strontium/barium, fibrous filler, dyed low molecular organic compound treatment, etc., can solve the problems of difficult uniform dispersion and poor compatibility of nano calcium carbonate, Achieve the effect of narrow particle size range, improved impact strength and reduced surface free energy

Active Publication Date: 2018-01-26
广西华洋矿源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for modifying ultrafine light calcium carbonate to solve the problem that traditional nano calcium carbonate is difficult to uniformly disperse when blended with PVC and has poor compatibility with PVC.

Method used

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  • Method for modifying ultrafine light calcium carbonate and application of ultrafine light calcium carbonate in plastics
  • Method for modifying ultrafine light calcium carbonate and application of ultrafine light calcium carbonate in plastics

Examples

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Embodiment 1

[0031] A modification method of superfine light calcium carbonate, comprising the following steps:

[0032] (1) pulping: it comprises the following steps:

[0033] A1. Preparation of Ca(OH) 2 Suspension: Put CaO into the digester and digest with water to obtain Ca(OH) 2 Suspension; when adding water for digestion, the mass ratio of water to CaO is 1:20, and the water temperature is 70°C.

[0034] A2. Add crystal form control agent: Ca(OH) prepared in step A1 2 A crystal form control agent is added to the suspension to obtain a mixed solution; the crystal form control agent is prepared from the following raw materials in parts by weight: 4 parts of sodium citrate, 5 parts of citric acid, 3 parts of glycolic acid, 1 part of propionic acid and lactic acid 1 part; the mass ratio of the crystal form control agent to the CaO is 1:50.

[0035] A3. Carbonization reaction: first, the mixed solution obtained in step A2 is added to a carbonization reactor with a stirring device; then...

Embodiment 2

[0045] A modification method of superfine light calcium carbonate, comprising the following steps:

[0046] (1) pulping: it comprises the following steps:

[0047] A1. Preparation of Ca(OH) 2 Suspension: Put CaO into the digester and digest with water to obtain Ca(OH) 2 Suspension; when adding water for digestion, the mass ratio of water to CaO is 1:15, and the water temperature is 80°C.

[0048] A2. Add crystal form control agent: Ca(OH) prepared in step A1 2 A crystal form control agent is added to the suspension to obtain a mixed solution; the crystal form control agent is prepared from the following raw materials in parts by weight: 8 parts of sodium citrate, 10 parts of citric acid, 5 parts of glycolic acid, 3 parts of propionic acid and lactic acid 3 parts; the mass ratio of the crystal form control agent to the CaO is 1:20.

[0049] A3. Carbonization reaction: first, the mixed solution obtained in step A2 is added to a carbonization reactor with a stirring device; t...

Embodiment 3

[0059] A modification method of superfine light calcium carbonate, comprising the following steps:

[0060] (1) pulping: it comprises the following steps:

[0061] A1. Preparation of Ca(OH) 2 Suspension: Put CaO into the digester and digest with water to obtain Ca(OH) 2 Suspension; when adding water for digestion, the mass ratio of water to CaO is 1:18, and the water temperature is 75°C.

[0062] A2. Add crystal form control agent: Ca(OH) prepared in step A1 2 A crystal form control agent is added to the suspension to obtain a mixed solution; the crystal form control agent is prepared from the following raw materials in parts by weight: 6 parts of sodium citrate, 8 parts of citric acid, 4 parts of glycolic acid, 2 parts of propionic acid and lactic acid 2 parts; the mass ratio of the crystal form control agent to the CaO is 1:35.

[0063] A3. Carbonization reaction: first, the mixed solution obtained in step A2 is added to a carbonization reactor with a stirring device; th...

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Abstract

The invention discloses a method for modifying ultrafine light calcium carbonate and application of the ultrafine light calcium carbonate in plastics, and belongs to the technical field of calcium carbonate manufacture. The modifying method comprises the steps of pulping, treating surface and preparing a finished product, wherein the pulping step comprises the steps of preparing Ca(OH)2 suspension, adding crystal form controlling agent and performing carbonization reaction; the crystal form controlling agent is prepared from the following raw materials in parts by weight: 4-8 parts of sodium nitrate, 5-10 parts of citric acid, 3-5 parts of glycolic acid, 1-3 parts of propionic acid and 1-3 parts of lactic acid; a surface activation coating agent is prepared from the following raw materialsin parts by weight: 14-20 parts of phthalic acid ethylene glycol monobutyl ether ester sodium salt, 2-6 parts of isopropyl alcohol, 3-7 parts of diethylene glycol monobutyl ether, 8-12 parts of octadecylamine, 4-8 parts of lauryl amine and 5-9 parts of sorbitan monolaurate. The ultrafine light calcium carbonate can be used for improving the toughness and strength of PVC, and solving the problemsof uniform dispersing difficulty and poor compatibility with PVC when traditional nano-calcium carbonate is mixed with PVC.

Description

technical field [0001] The invention belongs to the technical field of calcium carbonate production, and in particular relates to a modification method of ultrafine light calcium carbonate and its application in plastics. Background technique [0002] PVC is one of the most widely used thermoplastic resins in our daily life. It has many advantages such as flame retardancy, wear resistance, corrosion resistance, and low price. It is widely used in pipes, door and window profiles, and wires. However, PVC has low impact strength and poor thermal stability; among them, the disadvantage of low impact strength severely limits the application of PVC. Therefore, we must toughen PVC. [0003] CaCO 3 It is an important inorganic chemical product. Due to its low price, wide range of raw materials, and non-toxicity, it is widely used as a filler in rubber, plastic, paper, paint, toothpaste, etc. Ordinary CaCO 3 Used as a filler only to increase the volume and reduce the price of the...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/08C01F11/18C08L27/06C08K9/10C08K3/26
Inventor 李文康张宸宇欧西江
Owner 广西华洋矿源材料有限公司
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