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Hollow polymer emulsion capable of forming films at room temperature and preparation method thereof

A technology of polymer emulsion and polymer latex, which is applied in the field of room temperature film-forming hollow polymer emulsion and its preparation, can solve the problems of system stability decline, high glass transition temperature of emulsion polymer, and incapability of self-film formation, etc. The effect of preparation technology and broad market prospect

Inactive Publication Date: 2012-10-31
北京东方亚科力化工科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are the following main problems in this method at present: (1) After preparing the multi-layer core-shell structure polymer emulsion, must add alkali again and carry out post-treatment to it to form hollow polymer emulsion, and polymer emulsion after alkali osmotic swelling , the stability of the system will be greatly reduced, which will have adverse effects on the storage and use of the product; (2) The glass transition temperature of the emulsion polymer is too high to form a film by itself, so it must be used together with other polymer emulsions with film-forming properties in order to exert its function and function

Method used

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  • Hollow polymer emulsion capable of forming films at room temperature and preparation method thereof
  • Hollow polymer emulsion capable of forming films at room temperature and preparation method thereof
  • Hollow polymer emulsion capable of forming films at room temperature and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1, preparation room temperature film-forming hollow polymer emulsion

[0042] (1) Preparation of seed emulsion: 550 grams of deionized water and 0.12 grams of sodium lauryl sulfate were added in a 1-liter four-neck flask equipped with a stirrer, thermometer, reflux condenser and nitrogen inlet pipe, and the mixture was replaced by nitrogen. Heat to 60°C. A mixture of 17.0 g of methyl methacrylate, 1.6 g of methacrylic acid and 1.4 g of butyl acrylate was added to the flask, and 20 g of a solution containing 0.1 g of potassium persulfate was added thereto. Insulated and stirred for 7 hours to obtain seed emulsion. The seed emulsion has a solid content of 3.3 wt % and an average particle diameter of 0.05 μm.

[0043] (2) Preparation of core polymer: Take 100 grams of the above seed emulsion and add it to a 1-liter four-necked flask equipped with a stirrer, a thermometer and a reflux condenser, dilute with 300 grams of deionized water, and heat to 60° C. Take...

Embodiment 2

[0047] Embodiment 2, preparation room temperature film-forming hollow polymer emulsion

[0048] (1) Preparation of seed emulsion: 550 grams of deionized water and 0.06 grams of sodium lauryl sulfate were added to a 1-liter four-necked flask equipped with a stirrer, thermometer, reflux condenser and nitrogen inlet pipe, and the mixture was replaced by nitrogen. Heat to 70°C. A mixture of 14.0 g of methyl methacrylate, 1.5 g of methacrylic acid and 2.5 g of butyl acrylate was charged to the flask, and 20 g of a solution containing 0.2 g of potassium persulfate was added thereto. Insulated and stirred for 5 hours to obtain seed emulsion. The seed emulsion has a solid content of 3.1 wt % and an average particle diameter of 0.09 μm.

[0049] (2) Preparation of core polymer: Take 90 grams of the above-mentioned seed emulsion and add it to a 1-liter four-necked flask equipped with a stirrer, a thermometer and a reflux condenser, dilute with 300 grams of deionized water, and heat to...

Embodiment 3

[0053] Embodiment 3, preparation room temperature film-forming hollow polymer emulsion

[0054] (1) Preparation of seed emulsion: 550 grams of deionized water and 0.04 grams of sodium lauryl sulfate were added to a 1-liter four-neck flask equipped with a stirrer, thermometer, reflux condenser and nitrogen inlet pipe, and the mixture was replaced by nitrogen. Heat to 80°C. A mixture of 16.0 g of methyl methacrylate, 0.7 g of methacrylic acid and 3.3 g of butyl methacrylate was added to the flask, and 20 g of a solution containing 0.3 g of potassium persulfate was added thereto. Insulated and stirred for 3 hours to obtain seed emulsion. The seed emulsion has a solid content of 3.4 wt % and an average particle diameter of 0.14 μm.

[0055] (2) Preparation of core polymer: Take 80 grams of the above-mentioned seed emulsion and add it to a 1-liter four-necked flask equipped with a stirrer, a thermometer and a reflux condenser, dilute with 250 grams of deionized water, and heat to...

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Abstract

The invention discloses hollow polymer emulsion capable of forming films at room temperature and a preparation method thereof. The hollow polymer emulsion is prepared by the following steps: preparing nuclear emulsion particles with high carboxyl content and low degree of cross linking by a two-step seeded emulsion polymerization method, and sequentially coating a polarity transition layer, a structural support layer and a film forming layer to obtain the hollow polymer emulsion capable of forming films. Treatment after alkali swelling is omitted, so that preparation process is simplified, and prepared polymer emulsion can be formed into films. The polymer emulsion can be used as a substitute of titanium dioxide and organic pigment to be applied to the fields of coating, papermaking, cosmetics, fine chemical industry and the like.

Description

technical field [0001] The invention relates to a room-temperature film-forming hollow polymer emulsion and a preparation method thereof. Background technique [0002] Hollow polymer emulsion is a kind of functional polymer emulsion composed of hollow polymer latex particles and water. It can be used as white pigment, Thermal insulation materials, lightweight fillers, etc. are widely used in industries such as coatings, adhesives, inks, papermaking and cosmetics. The osmotic swelling method was first proposed by Kowalski A et al. (EP Patent, 22633, 1981-01-21), and is currently the most mature method for preparing submicron polymer hollow emulsions and hollow microspheres. The Rohm and Haas Company of the United States has FORM ROPAQUE TM A series of commercial products (such as OP-62, Ultra E, etc.). The method includes: firstly preparing the core-shell polymer latex particles containing carboxyl groups in the core by seed emulsion polymerization, and then swelling the l...

Claims

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Application Information

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IPC IPC(8): C08F285/00C08F220/14C08F220/06C08F220/18C08F212/08C08F2/26C08J5/18
Inventor 邓伟张孟钧江一明阚成友李学燕梁泓
Owner 北京东方亚科力化工科技有限公司
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