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Novel nano calcium carbonate used for plastic film and preparation method thereof

A nano-calcium carbonate, plastic film technology, applied in fibrous fillers, dyed low-molecular-weight organic compound treatment, dyed organosilicon compound treatment and other directions, can solve the problem of nano-calcium carbonate dispersion difficulty, affecting the mechanical properties and transparency of the film, etc. Achieve the effect of increasing tensile strength, improving mechanical properties, and good hydrophobicity

Inactive Publication Date: 2011-02-09
山东海泽纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the difficulty in dispersing nano-calcium carbonate in polyolefin, it is easy to form aggregates and affect the mechanical properties and transparency of the film

Method used

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  • Novel nano calcium carbonate used for plastic film and preparation method thereof
  • Novel nano calcium carbonate used for plastic film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] After the limestone is cleaned, it is calcined at 1000°C and digested with water to obtain Ca(OH) 2 Slurry, transferred to the membrane dispersion carbonization reactor, adding 0.5% (relative to Ca(OH) 2 ) of sucrose. Introduce 30% (v) of CO 2 Carry out carbonization at 17°C, when the pH drops to 6.8, continue aeration for 10 minutes to obtain 8% nano-CaCO 3 Puree. Heat the original slurry, raise the temperature to 80°C and stir for 5 minutes, add 1.0% (equivalent to CaCO 3 ) of stearic acid, stirred for 40 minutes, and added 6% (equivalent to stearic acid) NaOH. Filtration, drying, crushing. Weigh 3% (equivalent to calcium carbonate) of a certain titanate modifier, heat and dissolve it in ethanol at 60°C, add stearic acid-modified calcium carbonate into the solvent, continue stirring for 30 minutes, filter Afterwards, it is dried and pulverized to make a product.

Embodiment 2

[0023] Calcinate the limestone at 1000°C after cleaning, add water to digest at 80°C to obtain Ca(OH) 2 Slurry, transferred to the membrane dispersion carbonization reactor, adding 0.5% (relative to Ca(OH) 2 ) of sucrose. Introduce 30% (v) of CO 2 Carry out carbonization at 17°C, when the pH drops to 6.8, continue aeration for 10 minutes to obtain 8% nano-CaCO 3 Raw pulp, filtered, dried and crushed. Weigh 3% (equivalent to calcium carbonate) of a certain titanate modifier, heat and dissolve it in ethanol at 60°C, add unmodified calcium carbonate into the solvent, continue stirring for 30 minutes, filter, dry and pulverize , to make a product.

Embodiment 3

[0025] Calcinate the limestone at 1000°C after cleaning, add water to digest at 80°C to obtain Ca(OH) 2 Slurry, transferred to the membrane dispersion carbonization reactor, adding 0.5% (relative to Ca(OH) 2 ) of sucrose. Introduce 30% (v) of CO 2 Carry out carbonization at 17°C, when the pH drops to 6.8, continue aeration for 10 minutes to obtain 8% nano-CaCO 3 Raw pulp, filtered, dried and crushed. Take 2000g of calcium carbonate and add it to a high-speed mixer, heat at 110°C, rotate at 1500 rpm, stir for 15 minutes, add 40g of the prepared silane coupling agent, stir for another 20 minutes, and then discharge.

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Abstract

The invention discloses novel nano calcium carbonate used for a plastic film and a preparation method thereof. A Ca(OH)2 suspension and CO2 are carbonized in a reactor to generate the nano calcium carbonate, and then the obtained nano calcium carbonate is subjected to liquid phase coating treatment or is directly subjected to mixed coating by using dried nano calcium carbonate and a surfactant to obtain nano calcium carbonate powder which is highly dispersed and surface-activated. The invention has the advantages that: the process is simple, the nano calcium carbonate is effectively dispersed in a polymer and a remarkable enhancement effect can be achieved on the premise of ensuring the transparency. The nano calcium carbonate prepared by adopting the invention can remarkably improve the mechanical property of a polyolefin material; after the nano calcium carbonate is used for polyethylene plastic, the tension strength of the material is greatly improved; and after the nano calcium carbonate is used for a polyolefin film, a fish eye is free, and the high transparency of the film is maintained.

Description

technical field [0001] The invention relates to a preparation method of nano calcium carbonate, in particular to a novel nano calcium carbonate used for plastic films and a preparation method thereof. Background technique [0002] Nano-calcium carbonate is a very important functional inorganic filler, which is widely used in polymer products because of its low price, white color and good comprehensive performance. However, since calcium carbonate without surface modification generally has poor affinity with polymers, it is easy to cause uneven dispersion in the polymer base material and cause interface defects between the two materials. With the increase of the filling amount, These shortcomings are more obvious, coupled with the electrostatic effect on the surface of the particles and the high surface energy, it is easy to form agglomerates. In order to improve the performance of nano-calcium carbonate on polymer materials, it is necessary to carry out surface modification...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/08C08L101/00C08K9/06C08L23/00C08K3/26C08K9/10C08K9/04C09C3/12C09C1/02
Inventor 李明英杜立波王卓郭安慧陈祥芝朱孝川
Owner 山东海泽纳米材料有限公司
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