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Nano-calcium carbonate modification method and application of nano-calcium carbonate to PVC (polyvinyl chloride) wood-plastic plate

A technology of nano-calcium carbonate and calcium carbonate, which is applied in the field of calcium carbonate, can solve problems such as easy agglomeration, and achieve the effects of improving interface adhesion, good stability, and improving flame retardancy

Inactive Publication Date: 2018-11-13
钦州市宝业坭兴陶厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem of easy agglomeration of existing nano-calcium carbonate and the defects of PVC wood-plastic boards, and provides a modification method of nano-calcium carbonate and its application in PVC wood-plastic boards.

Method used

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  • Nano-calcium carbonate modification method and application of nano-calcium carbonate to PVC (polyvinyl chloride) wood-plastic plate

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Experimental program
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Effect test

Embodiment 1

[0035] A kind of modified nano-calcium carbonate for PVC wood-plastic plate, the preparation of described modified nano-calcium carbonate comprises the steps:

[0036](1) Put quicklime and 60°C hot water into the digestion reactor according to the mass ratio of 1:5 to carry out digestion reaction, remove impurities, stand and age for 48 hours, and dilute to a specific gravity of 1.070 to obtain lime emulsion;

[0037] (2) Transport the lime emulsion to the carbonation reaction tower, feed carbon dioxide for carbonization reaction, add crystal form control agent and dispersant during the carbonization process, carbonize to pH 7, stop feeding carbon dioxide, and control calcium carbonate The specific surface area is 22.8m 2 / g, get nano-calcium carbonate slurry; Described crystal formation control agent is made up of phytic acid and disodium ethylenediamine tetraacetate that mass ratio is 2:1, and its add-on is 0.9% of calcium carbonate dry basis weight; Described dispersant is...

Embodiment 2

[0047] A kind of modified nano-calcium carbonate for PVC wood-plastic plate, the preparation of described modified nano-calcium carbonate comprises the steps:

[0048] (1) Put quicklime and 50°C hot water into the digestion reactor according to the mass ratio of 1:6 to carry out digestion reaction, remove impurities, stand and age for 36 hours, and dilute to a specific gravity of 1.065 to obtain lime emulsion;

[0049] (2) Transport the lime emulsion to the carbonation reaction tower, feed carbon dioxide for carbonization reaction, add crystal form control agent and dispersant during the carbonization process, carbonize to pH 6.5, stop feeding carbon dioxide, and control the calcium carbonate The specific surface area is 28.1m 2 / g, get nano-calcium carbonate slurry; Described crystal formation control agent is made up of phytic acid and edetate disodium that mass ratio is 1:1, and its add-on is 1.5% of calcium carbonate dry basis weight; Described dispersant is made up of po...

Embodiment 3

[0059] A kind of modified nano-calcium carbonate for PVC wood-plastic plate, the preparation of described modified nano-calcium carbonate comprises the steps:

[0060] (1) Put quicklime and 65°C hot water into the digestion reactor according to the mass ratio of 1:4 to carry out digestion reaction, remove impurities, stand and age for 24 hours, and dilute to a specific gravity of 1.070 to obtain lime emulsion;

[0061] (2) Transport the lime emulsion to the carbonation reaction tower, feed carbon dioxide for carbonization reaction, add crystal form control agent and dispersant during the carbonization process, carbonize to pH 7.5, stop feeding carbon dioxide, and control calcium carbonate The specific surface area is 20.6m 2 / g, get nano-calcium carbonate slurry; Described crystal formation control agent is made up of phytic acid and edetate disodium that mass ratio is 2:1, and its add-on is 1.2% of calcium carbonate dry basis weight; Described dispersant is made up of polyox...

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Abstract

The invention discloses a nano-calcium carbonate modification method and an application of nano-calcium carbonate to a PVC (polyvinyl chloride) wood-plastic plate. The nano-calcium carbonate modification method includes the steps: adding dispersing agents and crystal form control agents in a carbonation process; performing modification through diglycolamide oleate borate and dodecafluoro heptyl propyl polyhedral oligomeric silsesquioxane. The obtained modified nano-calcium carbonate has high dispersity, high toughness, weather resistance, flame resistance and excellent mechanical properties. The PVC wood-plastic plate comprises, by weight, 100 parts of PVC resin, 10-20 parts of EVA (ethylene-vinyl acetate) resin, 40-60 parts of bamboo powder, 30-50 parts of modified nano-calcium carbonate,3-5 parts of asbestos fibers, 4-6 parts of shell powder, 3-5 parts of polyacrylamide, 1-3 parts of polyether modified polydimethylsiloxane, 3-5 parts of composite foaming agents, 1-3 parts of coupling agents, 2-4 parts of stabilizing parts, 1-3 parts of lubricants, 0.5-1.5 parts of antibacterial agents and 3-5 parts of processing aids. The PVC wood-plastic plate has the advantages of high strength, high toughness, strong impact resistance, good flame resistance, strong antibacterial property, heat resistance, difficulty in deformation, good stability and the like.

Description

technical field [0001] The invention relates to the technical field of calcium carbonate, in particular to a method for modifying nanometer calcium carbonate and its application in PVC wood-plastic boards. Background technique [0002] Nano-calcium carbonate is a very important new functional nano-scale filler with excellent performance in industrial calcium carbonate. It can not only increase the filling capacity and reduce the cost, but also improve the surface color of the filled product and improve the comprehensive mechanical properties of the product. Calcium carbonate is an important inorganic chemical product, which is widely used in rubber, plastic, paper, composite board, paint, ink, medicine, automobile paint, cosmetics, food and other industries. However, due to the smaller the particle size of nano-calcium carbonate particles and the more atoms on the surface, the higher the surface energy, the stronger the adsorption, and the mutual agglomeration of each partic...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L23/08C08L97/02C08L33/26C08L83/12C08L71/02C08L23/06C08K13/06C08K9/04C08K9/00C08K3/26C08K7/12C08K3/22C08J9/08
CPCC08J9/0061C08J9/0066C08J9/0085C08J9/009C08J9/08C08J2203/02C08J2327/06C08J2423/08C08J2497/02C08K7/12C08K9/00C08K9/04C08K9/08C08K13/06C08K2003/2213C08K2003/265C08K2201/011C08K2201/014
Inventor 施宝业
Owner 钦州市宝业坭兴陶厂
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