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Surface treatment method for improving hydrophobicity of Nano particles of calcium carbonate

A nano-calcium carbonate and surface treatment technology, which is applied in the direction of dyeing polymer organic compound treatment, fibrous fillers, etc., can solve problems such as thermal stability decline

Inactive Publication Date: 2003-12-24
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

and cause a decrease in thermal stability

Method used

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  • Surface treatment method for improving hydrophobicity of Nano particles of calcium carbonate
  • Surface treatment method for improving hydrophobicity of Nano particles of calcium carbonate
  • Surface treatment method for improving hydrophobicity of Nano particles of calcium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A. Emulsion polymerization:

[0037] The soft monomer is n-butyl acrylate, and the hard monomer is methyl methacrylate. Blend the soft monomer, hard monomer and methacrylic acid (the third component acid) in a weight ratio of 11:9:0.6 to form a monomer blend liquid. Emulsifier selects sodium dodecyl sulfate (SDS) and alkylphenol polyoxyethylene ether (OP-10), is respectively 0.25 gram and 0.55 gram, two kinds of emulsifiers are mixed in 15 grams of deionized water, heated to completely dissolved. Add the dissolved emulsifier solution into the reactor, then add 4.12 grams of the above-mentioned monomer blend solution, stir and heat up to 75 ° C, and add 0.06 grams of ammonium persulfate (analytical pure) dissolved in 23 grams of deionized water at one time . When the temperature rises back to 80°C, the monomers start to be triggered, and when the system obviously appears "blue", keep the reaction temperature at 80°C, then add 37.08 grams of the monomer blend solution ...

Embodiment 2

[0043] A. Emulsion polymerization:

[0044] The soft monomer is 2-ethylhexyl acrylate, and the hard monomer is methyl methacrylate. Blend the soft monomer, hard monomer and methacrylic acid (the third component acid) at a weight ratio of 10:10:0.2 to form a monomer blend. Emulsifier selects sodium dodecyl sulfate (SDS) and alkylphenol polyoxyethylene ether (OP-10), is respectively 0.24 gram and 0.48 gram, two kinds of emulsifiers are mixed in 15 grams of deionized water, heated to completely dissolved. Add the dissolved emulsifier solution into the reactor, then add 4.242 grams of the above-mentioned monomer blend solution, stir and heat up to 75 ° C, and add 0.021 grams of ammonium persulfate (analytical pure) dissolved in 22 grams of deionized water at one time . When the temperature rises to 80°C, the monomers start to be triggered, and when the system obviously appears "blue", keep the reaction temperature at 80°C, then add 37.178 grams of the monomer blend solution dro...

Embodiment 3

[0050] A. Emulsion polymerization:

[0051] The soft monomer is selected from ethyl acrylate, and the hard monomer is selected from methyl methacrylate. Blend the soft monomer, hard monomer and acrylic acid (the third component acid) in a weight ratio of 10:10:0.1 to form a monomer blend liquid. Emulsifier selects sodium dodecyl sulfate (SDS) and alkylphenol polyoxyethylene ether (OP-10), is respectively 0.34 gram and 0.48 gram, two kinds of emulsifiers are mixed in 15 grams of deionized water, heated to Dissolve completely, add the emulsifier solution that has dissolved in the reactor, then add 4.12 grams of the above-mentioned monomer blends, stir and heat up to 75 ° C, and add 0.02 grams of ammonium persulfate dissolved in 23 grams of deionized water ( analytically pure). When the temperature rises to 80°C, the monomers start to be triggered, and when the system obviously appears "blue", keep the reaction temperature at 80°C, then add 37.08 grams of the monomer blend solu...

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Abstract

A surface treating process for improving the hydrophobicity of calcium carbonate nanoparticles for PVC features that the acrylate copolymer emulsion is used as the surface improver to treat the nano calcium carbonate slurry under stirring condition. Its advantage is high effect.

Description

Technical field: [0001] The invention relates to a surface treatment method for improving the hydrophobicity of nanometer calcium carbonate particles. Background technique: [0002] As an important inorganic chemical product, calcium carbonate is widely used in various industries such as rubber, paint, paper, ink, printing, cable, food, medicine, cosmetics, toothpaste, feed, lubricants, etc. However, since the surface of calcium carbonate powder has many hydroxyl groups, the hydrophilic and oleophobic properties are obvious, it is easy to form agglomerates during production and storage, the dispersion is extremely poor, and it is difficult to apply directly, so it generally must be surface treated. With the rise of nano-materials, the production of nano-calcium carbonate has also been industrialized. Nano-scale calcium carbonate particles have smaller particle sizes and are more likely to agglomerate, which puts forward higher requirements for the surface treatment of nano-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/10
Inventor 李效玉叶露陈丹青邴涓林
Owner BEIJING UNIV OF CHEM TECH
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