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Nano silicon dioxide/acrylate composite emulsion and process for preparing same

A technology of nano-silica and acrylate, which is applied in the field of nano-silica/acrylate composite emulsion and its preparation, can solve problems such as material brittleness, and achieve good hardness and improved aging resistance

Inactive Publication Date: 2005-08-17
江苏汉德纳米材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Synthesis of nano-SiO by sol-gel method 2 The characteristics of the composite material are: the reaction conditions are relatively mild, and the nano-SiO 2 The dispersion in the polymer is relatively uniform. The main disadvantage is that the material is easily brittle due to the volatilization of solvent and water molecules during the gel process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Nano silicon dioxide treatment: weigh 10 grams of gas phase nano SiO 2 Dry in an oven at 100°C for 2 hours. Then mix with 100 grams of toluene and ultrasonically disperse for half an hour, add 10 grams of γ-aminopropyltriethoxysilane, stir for 15 minutes, heat to 100°C and reflux for 3 hours, then filter, take the filter cake and wash it repeatedly with ethanol until vacuum The oven was evaporated at 0.04Mpa for 1 hour. Finally the sample was dried at 110°C for 1 hour. Then put it in a desiccator for later use.

[0030] Preparation of composite emulsion: take the above-mentioned treated nano-SiO 2 0.3 g was dispersed mechanically at high speed for 15 minutes in water with a small amount of sodium lauryl sulfate, and the dispersed nano-SiO 2 Add the flask and heat to 75°C, add 90 g of water, NaHCO 3 0.36 g, (NH 4 ) 2 S 2 o 8 0.36 grams, 0.9 grams of sodium lauryl sulfate, 0.9 grams of nonylphenol polyoxyethylene ether OP-10 emulsifier, 24 grams of monomer methyl...

Embodiment 2

[0032] Nano silicon dioxide treatment: weigh 2 grams of gas phase nano SiO 2 Dry in an oven at 100°C for 2 hours. Then mix with 20 grams of toluene and ultrasonically disperse for half an hour, add 2.5 grams of γ-methacryloxypropyltrimethoxysilane, stir for 15 minutes, heat to 100°C and reflux for 3 hours, then filter, take the filter cake and wash it repeatedly with ethanol , to evaporate in a vacuum oven at 0.04Mpa for 1 hour. Finally the sample was dried at 110°C for 1 hour. Then put it in a desiccator for later use.

[0033] Preparation of composite emulsion: the nano-SiO treated by the above method 2 0.5 grams plus 90 grams of water, NaHCO 3 0.36 g, (NH 4 ) 2 S 2 o 8 0.36 grams, 0.9 grams of sodium lauryl sulfate, 0.9 grams of nonylphenol polyoxyethylene ether OP-10 emulsifier, 24 grams of methyl methacrylate, 36 grams of butyl acrylate, 1.2 grams of methacrylic acid, emulsifier Pre-emulsify for 15 minutes, and use in-situ polymerization to synthesize a composite...

Embodiment 3

[0035] Nano silicon dioxide treatment: weigh 10 grams of gas phase nano SiO 2 Dry in an oven at 100°C for 2 hours. Then mix with 100 grams of toluene and ultrasonically disperse for half an hour, add 10 grams of γ-aminopropyldiethoxysilane, stir for 15 minutes, heat to 100°C and reflux for 3 hours, then filter, take the filter cake and wash it repeatedly with ethanol until vacuum The oven was evaporated at 0.04Mpa for 1 hour. Finally the sample was dried at 110°C for 1 hour. Then put it in a desiccator for later use.

[0036] Preparation of composite emulsion: the treated nano-SiO 2 1 gram plus 90 grams of water, NaHCO 3 0.36 g, (NH 4 ) 2 S 2 o 8 0.36 grams, 0.9 grams of sodium lauryl sulfate, 0.9 grams of nonylphenol polyoxyethylene ether OP-10 emulsifier, 24 grams of methyl methacrylate, 36 grams of butyl acrylate, 1.2 grams of methacrylic acid, emulsifier Pre-emulsify for 15 minutes, and use in-situ polymerization to synthesize a composite emulsion. First, take 20 ...

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PUM

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Abstract

The present invention discloses one kind of nanometer composite silica / acrylate emulsion and its preparation process. The present invention is superior to available technology, and the composite emulsion has dispersed nanometer inorganic silica phase in 0.1-5 % of the total weight of monomers for the acrylate copolymer emulsion. The preparation process includes the surface treatment of nanometer inorganic silica phase, and synthesizing nanometer inorganic phase / polymer emulsion in molecular level compounding through in-situ polymerization process or seed emulsion polymerization process. The composite emulsion of the present invention can form film with doubled tensile strength and breaking elongation. Adding nanometer silica in 0.2 % results in tensile strength of 5.25 MPa and breaking elongation of 1300 %.

Description

technical field [0001] The present invention relates to a kind of composite emulsion used in industries such as textile, fiber, paint, adhesive and plastic additives and its preparation method, more specifically to a kind of nano silicon dioxide / acrylate composite emulsion and its preparation method. Background technique [0002] Acrylate is a general term for esters of acrylic acid and its homologues, which can be self-polymerized or copolymerized with other monomers. Since acrylates, as polymer monomers, contain unsaturated double bonds and polar molecular structures, they can be constructed into many polymer formulations with various properties, so they can be obtained with different viscosity, hardness, durability, and glass transition temperature. And other characteristics, so that its products have various uses, and are widely used in industries such as textiles, fibers, coatings, adhesives and plastic additives. [0003] As the whole society pays more attention to h...

Claims

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Application Information

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IPC IPC(8): C08F2/22C08K9/06C08L33/06
Inventor 陈苏陈莉
Owner 江苏汉德纳米材料科技有限公司
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