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Low-viscosity active calcium carbonate, preparation method and application thereof

An activated calcium carbonate, low-viscosity technology, used in dyeing low-molecular-weight organic compounds, fibrous fillers, etc., can solve the problems of high price and high production cost of PVC resin, reduce oil absorption value, reduce production cost, and improve dispersion. and compatibility effects

Inactive Publication Date: 2009-11-25
FUJIAN SANNONG CALCIUM CARBONATE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PVC resin usually uses dioctyl phthalate as a plasticizer, but the price of dioctyl phthalate is very high, which makes the production cost of PVC resin high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) A preparation method of low-viscosity active calcium carbonate: heat up 1000 grams of 600-mesh heavy calcium carbonate to 110°C in a high-speed mixer, add 2.5 grams of stearic acid and mix at high speed for 5 minutes; then add 7 grams of fatty alcohol polyoxygen Vinyl ether, 140°C, high-speed mixing for 5 minutes, cooling, 200-mesh airflow sieve to obtain a low-viscosity active calcium carbonate.

[0020] 2) Application of low-viscosity active calcium carbonate: Add 100 grams of PVC paste resin to 90 grams of DOP, stir evenly, then add 200 grams of the above-mentioned calcium carbonate and stir evenly, and measure the viscosity of the system with a rotational viscometer to be 3800Mpa.S.

Embodiment 2

[0022] Add 100 grams of PVC paste resin to 90 grams of DOP, stir evenly, then add 200 grams of untreated 600 mesh heavy calcium carbonate and stir evenly, and measure the viscosity of the system with a rotational viscometer to be 5600Mpa.S.

[0023] From the result of embodiment 1 and embodiment 2 as can be known, active calcium carbonate of the present invention is compared with unactivated calcium carbonate, and it is applied in PVC paste resin, can obviously reduce system viscosity.

Embodiment 3

[0025] Heat 1000 grams of 600 mesh heavy calcium carbonate to 110°C in a high-speed mixer, add 7 grams of fatty alcohol polyoxyethylene ether, mix at 140°C for 5 minutes at high speed, cool and sieve. Add 100 grams of PVC paste resin into 90 grams of DOP, stir evenly, then add 200 grams of the above-mentioned calcium carbonate and stir evenly, and measure its system viscosity with a rotational viscometer to be 4380Mpa.S.

[0026] From the result described in embodiment 3, it can be known that the activated calcium carbonate prepared by adding fatty alcohol polyoxyethylene ether alone is applied in PVC paste resin, and its system viscosity is higher than that of the activated calcium carbonate described in embodiment 1 applied in PVC paste resin. System viscosity.

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Abstract

The invention discloses low-viscosity active calcium carbonate, a preparation method and application thereof. The preparation method comprises the following steps: (1) calcium carbonate is heated up to 100-120 DEG C in a high-speed stirrer or a mixer, and then a surface conditioning agent containing 0.1-0.5 percent of calcium carbonate according to the weight is added and mixed at a high speed for 3-5 minutes; (2) fatty alcohol polyoxyethylene ether containing 0.3-1.0 percent of calcium carbonate according to the weight is added at 130-140 DEG C, mixed at a high speed for 3-5 minutes and cooled; and (3) the mixture is sieved so as to obtain the low-viscosity active calcium carbonate. The active calcium carbonate prepared by the method can be applied to PVC resin leather. When the calcium carbonate is applied to PVC paste resin for reducing the viscosity of the PVC paste resin system, 20-25 percent of the dosage of dioctylphthalate (DOP) which is a plasticizing agent can be reduced or 15-20 percent of the filler content of the calcium carbonate can be improved, thereby reducing the production cost of the PVC resin leather.

Description

technical field [0001] The invention relates to calcium carbonate and a preparation method thereof, in particular to a low-viscosity calcium carbonate used in PVC resin leather and a preparation method thereof. Background technique [0002] Calcium carbonate is a very important inorganic chemical product, which is widely used in industries such as rubber, plastics, papermaking, coatings, inks, etc. It can improve the heat resistance, wear resistance, dimensional stability and rigidity of products, and reduce the Product cost. According to different production methods of calcium carbonate, calcium carbonate can be divided into light calcium carbonate, heavy calcium carbonate and active calcium carbonate. Light calcium carbonate, also known as precipitated calcium carbonate, referred to as light calcium, is calcined limestone and other raw materials to generate lime (mainly composed of calcium oxide) and carbon dioxide, and then add water to digest the lime to produce lime mi...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/08C08L27/06C08K3/26
Inventor 张有祥巫锡海杨微
Owner FUJIAN SANNONG CALCIUM CARBONATE CO LTD
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