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A kind of preparation method of secondary modified light calcium carbonate for plastic products

A light calcium carbonate, secondary modification technology, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problem that the secondary modified light calcium carbonate is limited to laboratories, and there is no industrial mass production of products, etc. Achieve the effects of improving surface finish, increasing filling capacity and good compatibility

Active Publication Date: 2021-02-23
卢氏国嵩莱纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the preparation technology of secondary modified light calcium carbonate in China is still limited to the laboratory, and there is no industrial mass-produced product
Moreover, the laboratory preparation of secondary modified light calcium carbonate mostly adopts methods that are difficult to industrialize such as double decomposition reaction method, urea hydrolysis method and light calcium carbonate pyrolysis method, and the success rate of carbonization method is extremely low, and the product contains a large amount of Refractory Magnesium

Method used

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  • A kind of preparation method of secondary modified light calcium carbonate for plastic products
  • A kind of preparation method of secondary modified light calcium carbonate for plastic products
  • A kind of preparation method of secondary modified light calcium carbonate for plastic products

Examples

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Embodiment 1

[0036] A preparation method for secondary modified light calcium carbonate for plastic products, comprising the following steps,

[0037] Step 1: Hydrate calcium oxide with water at 60°C in a mass ratio of 1:5, remove impurities from the prepared calcium hydroxide emulsion through a vibrating screen and a suspension separator, and age for 48 hours for later use;

[0038] Step 2, adjusting the concentration of the aged calcium hydroxide seminal pulp to 1.3mol / L, adding a crystal form control agent of 0.3% by dry weight of calcium carbonate, and the crystal form control agent is perfluoroalkyl betaine and aluminum chloride , the mass ratio is 1:1, and the temperature is adjusted to 70°C;

[0039]Step 3. Transport the fine calcium hydroxide slurry in step 2 to the carbonization kettle, adjust the frequency of the stirring motor of the carbonization kettle to 50Hz, and feed in the purified, cooled and compressed lime kiln gas for carbonization reaction. The kiln gas flow rate is 1...

Embodiment 2

[0044] A preparation method for secondary modified light calcium carbonate for plastic products, comprising the following steps,

[0045] Step 1. Hydrate calcium oxide and water at 62°C in a mass ratio of 1:5, remove impurities from the prepared calcium hydroxide emulsion through a vibrating screen and a suspension separator, and age for 50 hours for later use;

[0046] Step 2, adjusting the concentration of the aged calcium hydroxide seminal pulp to 1.4mol / L, adding a crystal form control agent of 0.2% by dry weight of calcium carbonate, the crystal form control agent being perfluoroalkyl betaine and magnesium sulfate, Its mass ratio is 1:1, and the temperature is adjusted to 75°C;

[0047] Step 3: Transport the fine calcium hydroxide slurry in step 2 to the carbonization kettle, adjust the frequency of the stirring motor of the carbonization kettle to 50Hz, and feed in the purified, cooled and compressed lime kiln gas for carbonization reaction, and the flow rate of the kiln...

Embodiment 3

[0052] A preparation method for secondary modified light calcium carbonate for plastic products, comprising the following steps,

[0053] Step 1, hydration reaction of calcium oxide and water at 65°C in a mass ratio of 1:5, the prepared calcium hydroxide emulsion is removed by a vibrating screen and a suspension separator, and aged for 53 hours for later use;

[0054] Step 2, adjusting the concentration of the aged calcium hydroxide seminal pulp to 1.5mol / L, adding a crystal form control agent of 0.15% by dry weight of calcium carbonate, the crystal form control agent is perfluoroalkyl betaine, magnesium chloride, and The mass ratio is 1:1, and the temperature is adjusted to 78°C;

[0055] Step 3. Transport the fine calcium hydroxide slurry in step 2 to the carbonization kettle, adjust the frequency of the stirring motor of the carbonization kettle to 50Hz, and feed the purified, cooled, and compressed lime kiln gas for carbonization reaction. The kiln gas flow rate is 2.0m 3...

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Abstract

The present invention disclosed a preparation method for plastic products to use secondary modifiers of calcium carbonate to digest, sieve, divide, and aggressive lime digestion, siege, remove miscellaneous, and agglomerate.Modernism, after completing the reaction, perform pressure filtering and dehydration, drying, add the dried powder to the crushing of the coupling agent for secondary dry method, and then classify it to obtain the secondary modification of the plastic product to obtain light quality light qualityCalcium carbonate; the secondary modified light carbonate crystal prepared by the present invention is a stick -like shape, the grain is 1.5 to 2.0 μm long, the diameter is about 150‑200nm, the long diameter ratio is about 8‑10, and the BET ratio is ratio.Surface area 9111m 2 / g, 22g25GDOP / G, used for PVC profiles and pipes, with high filling, higher impact strength, and higher product glossReduce the cost of PVC products.The process of this product is simple and feasible, the cost is low, the price is cheap, and it has good economic benefits.

Description

technical field [0001] The invention relates to the technical field of preparation of precipitated calcium carbonate, in particular to a preparation method of secondary modified light calcium carbonate for plastic products. Background technique [0002] Calcium carbonate is widely used to supplement natural resins such as polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), acrylonitrile butadiene-styrene copolymer (ABS). Adding calcium carbonate has a certain effect on improving some properties of plastic products and expanding its application range. In plastic processing, it can reduce the shrinkage rate of natural resins, improve rheology, and control viscosity. [0003] However, among the calcium carbonate used for plastic products on the market, heavy calcium carbonate plastic products have a relatively high density, are prone to brittleness, and have poor impact toughness; while ordinary light calcium carbonate and ordinary active light calcium carbonate pl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/04C08K3/26C08K9/06C08L27/06C01F11/18
Inventor 杜年军孙勇峰
Owner 卢氏国嵩莱纳米科技有限公司
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