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Preparation method of organic silicon acrylic ester self-organizing gradient emulsion film

The technology of acrylate and methyl methacrylate is applied in the field of preparation of organosilicon acrylate self-organized gradient latex film, which can solve the problems of complex process, environmental pollution and high energy consumption, and achieves simple preparation method, low energy consumption, The effect of low surface energy

Inactive Publication Date: 2012-07-18
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1640914A discloses a kind of solution blending method to prepare gradient film, their shortcoming is to adopt solution system or melting system to prepare, process is complicated, energy consumption is high, pollutes environment

Method used

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  • Preparation method of organic silicon acrylic ester self-organizing gradient emulsion film
  • Preparation method of organic silicon acrylic ester self-organizing gradient emulsion film
  • Preparation method of organic silicon acrylic ester self-organizing gradient emulsion film

Examples

Experimental program
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preparation example Construction

[0023] (1) Preparation of pre-emulsion 1:

[0024] Add deionized water and sodium 1-propenyl-2-hydroxyalkyl sulfonate into a three-necked flask equipped with a condensing reflux device and a constant-speed feeding device, stir rapidly for 5-60 minutes, then ultrasonicate for 0-20 minutes, and then add a mixing unit body to obtain a pre-emulsion 1; the mixed monomer is composed of two monomers, organosilicon monomer and methyl methacrylate, and the weight ratio of the two monomers is 1:4 to 4:1; the organosilicon monomer refers to γ -Methacryloxypropyl tri(trimethylsiloxy)silane, the amount of 1-propenyl-2-hydroxyl alkyl sodium sulfonate is 4%~10% of the total mass of the two monomers; 1 The structural formula of sodium propenyl-2-hydroxyalkylsulfonate is: CH 2 =CH-CH 2 -O-CH 2 -CH(OH)-CH 2 -SO 3 Na.

[0025] (2) Preparation of pre-emulsion 2:

[0026] Add deionized water and sodium 1-propenyl-2-hydroxyalkylsulfonate into a three-necked flask, stir rapidly for 5 to 60 mi...

Embodiment 1

[0040] Embodiment 1, the preparation of silicone acrylate copolymerization soap-free emulsion:

[0041] Add a certain amount of water and 0.02g sodium 1-propenyl-2-hydroxyalkylsulfonate into a three-necked flask equipped with a condensation reflux device and a constant-speed feeding device, and add mixed monomers (0.1g γ-methylpropene Acyloxypropyltris(trimethylsiloxy)silane, 0.4 g methyl methacrylate). The pre-emulsion was stirred for 5 minutes to obtain pre-emulsion 1. Add the remaining water and 0.04g sodium 1-propenyl-2-hydroxyalkylsulfonate into the three-necked flask, stir quickly and then add the mixed monomer (0.2g γ-methacryloyloxypropyltri(trimethylsilyl oxy) silane, 0.8 g methyl methacrylate). The pre-emulsion was stirred for 5 minutes to obtain pre-emulsion 2. Pass the pre-emulsion 1 with nitrogen for half an hour, add 0.0178g of disodium hydrogen phosphate solution and part of potassium persulfate, raise the temperature to 75°C, react for about half an hour and...

Embodiment 2

[0042] Embodiment 2, the preparation of silicone acrylate copolymerization soap-free emulsion:

[0043] Add a certain amount of water and 0.05g sodium 1-propenyl-2-hydroxyalkylsulfonate into a three-necked flask equipped with a condensing reflux device and a constant-speed feeding device, and after rapid stirring, add mixed monomers (0.4g γ-methylpropene Acyloxypropyltris(trimethylsiloxy)silane, 0.1 g methyl methacrylate,). The pre-emulsion was stirred for 60 minutes, and the ultrasonic wave was used for 20 minutes to obtain pre-emulsion 1. Add the remaining water and 0.1g sodium 1-propenyl-2-hydroxyalkylsulfonate into the three-necked flask, stir quickly and then add the mixed monomer (0.8g γ-methacryloxypropyltris(trimethylsiloxane) base) silane, 0.2 g methyl methacrylate). The pre-emulsion was stirred for 60 minutes, and the ultrasonic wave was used for 20 minutes to obtain the pre-emulsion 2. Pass the pre-emulsion 1 with nitrogen for half an hour, add 0.0178g of disodiu...

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Abstract

The invention relates to a preparation method of an organic silicon acrylic ester self-organizing gradient emulsion film, which in particular comprises the following steps: firstly adopting a soap-free emulsion method to prepare organic silicon acrylic ester copolymer soap-free emulsion and methyl methacrylate copolymer soap-free emulsion; blending the two emulsion according to the weight ratio of 1:1; and self-organizing to form the emulsion film of which the content of silicon element is in gradient change from the surface of the base material to the surface of the air by utilizing the difference of surface energy between different emulsion particles and the difference of selected wettability to the base material. The invention solves the hydrolysis problem of multiple organic silicon monomers in the emulsion polymerization process, improves the silicon content and hydrophobic nature of the polymer; the surface on one side of the formed gradient emulsion film possesses excellent film forming property and caking property of acrylic ester polymer, and the surface on the other side possesses the advantages of excellent high temperature resistance, ultraviolet resistance, infrared radiation resistance, oxidation degradability resistance, low surface energy and the like of organic silicon; and the preparation method is simple and easy to control, has no pollution to the environment and is applied widely.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a method for preparing a silicone acrylate self-organized gradient latex film. Background technique [0002] Silicone polymer is an elemental polymer that has been applied in industry earlier, and it has excellent performance. At present, commonly used silicone monomers are: vinyltrimethoxysilane, vinyltriethoxysilane, vinyltriisopropoxysilane, γ-methacryloxypropyltrimethoxysilane, γ- Acryloxypropyltriethoxysilane, γ-methacryloxypropyltriisopropoxysilane. Most of these monomers are silane coupling agents containing double bonds. Because they contain hydrolyzable groups Si-O-C, during the emulsion polymerization process, these groups will undergo a certain degree of hydrolysis and condensation, so that the polymer molecules are excessively cross-linked. It leads to unstable reaction and it is difficult to obtain polyacrylate emulsion with high silicon content. [0003] In previ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L33/14C08L33/12C08L33/08C08F220/28C08F220/14C08F2/26C08F220/18
Inventor 张超灿胡亮吴力立陈艳军胡园园张藕生
Owner WUHAN UNIV OF TECH
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