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Alkene emulsion, preparation method of emulsion and application of emulsion to coating

An emulsion and alkene technology, applied in the field of alkene emulsions and preparation, can solve the problems of alkene emulsions being adhered by heat, easy to absorb water and damp, and brittle when cold, and achieve poor water absorption, good adhesion and good water resistance. Effect

Inactive Publication Date: 2014-09-10
ANHUI HUAYE CONSTR ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned prior art, the purpose of the present invention is to overcome the phenomena of thermal adhesion, cold brittleness, low hardness and poor water resistance in the existing vinyl emulsion coatings, and to provide a kind of high hardness. High degree of cross-linking, poor water absorption, good water resistance and stable storage vinyl emulsion and its preparation method and its application in coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The present invention also provides a method for preparing vinyl emulsion, wherein the method comprises:

[0025] (1) Put the buffer regulator, epoxy resin, 50-80% by weight of emulsifier and 40-70% by weight of water in the first container, and emulsify under the condition of 30-50°C water bath to obtain the pre-emulsion M1 ;

[0026] (2) Put the vinyl substance, the remaining emulsifier and the remaining water in a second container, and emulsify it in a water bath at 30-50°C to obtain a pre-emulsion M2;

[0027] (3) Add the pre-emulsion M1 and the initiator dropwise to M2 at the same time. After the titration is completed, raise the temperature of the water bath to 75-95°C and keep it warm for 1-2 hours, then cool it down to 30-50°C to obtain an emulsion.

[0028] In the preparation method of the emulsion, the amount of each substance is such that in the prepared emulsion relative to 100 parts by weight of the vinyl substance, the amount of the epoxy resin is 5-20 pa...

Embodiment 1

[0039]Put 0.6g of sodium bicarbonate, 5g of epoxy resin, 0.5g of NP-10, 1g of MS-1, 1g of SDBS and 60g of water in the first container, and emulsify it in a water bath at 40°C to obtain a pre-emulsion M1; put 35g of formazan Methyl acrylate, 18g styrene, 40g butyl acrylate, 0.3gNP-10, 0.3gMS-1, 0.4gSDBS and 40g water were placed in a second container and emulsified in a water bath at 40°C to obtain a pre-emulsion M2; Add the pre-emulsion M1 and 0.5g of ammonium persulfate into M2 dropwise at the same time. After the titration is completed, raise the temperature of the water bath to 85°C and keep it warm for 1.5 hours, then cool down to 40°C. After cooling down, add 0.2g of triethylenetetramine to it. Then add ammonia water therein to adjust the pH to 9.0 to obtain an emulsion.

Embodiment 2

[0041] Preparation was carried out according to the implementation method of Example 1, except that the amount of epoxy resin used in this example was 12 g.

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Abstract

The invention discloses an alkene emulsion which is characterized by comprising the following raw materials in parts by weight relative to100 parts of alkene materials: 5-20 parts of epoxy resin, 2.0-4.5 parts of an emulsifier, 0.3-0.8 part of an initiator, 0.3-1.0 part of a buffer regulator and 70-120 parts of water. According to the alkene emulsion, the epoxy resin is combined with the alkene emulsion with good weather resistance, water resistance and chemical resistance by virtue of the characteristics of high strength and good adhesivity of the epoxy resin to bring the characteristics of the epoxy resin and the alkene emulsion into play, the epoxy resin is organically combined with the alkene emulsion to prepare a water emulsion type normal-temperature self-cross-linked emulsion, and the emulsion is applied to preparation of coatings, so that the prepared coating has the effects of relatively high hardness, high cross-linking degree, poor water absorptivity, good water resistance and stability in storage.

Description

technical field [0001] The invention relates to the field of paint emulsions, in particular to an vinyl emulsion, a preparation method and its application in paints. Background technique [0002] Coatings are widely used in daily construction and decoration. As a convenient and practical coating, vinyl emulsion coatings are especially common in daily decoration because of their good weather resistance, water resistance and chemical resistance. However, due to the physical and chemical properties of vinyl emulsions, such coatings are prone to thermal adhesion, cold brittleness, low hardness, and poor water resistance, making them easy to absorb water and get damp. In the later period of the daily decoration process, the wall absorbs water and gets damp, and the paint is unstable, which affects normal life. [0003] Therefore, it is an urgent problem to be solved in the present invention to provide a vinyl emulsion with high hardness, high degree of crosslinking, poor water a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/08C09D163/00C09D7/12C08F220/18C08F220/14C08F212/08C08F2/24
Inventor 金瑜
Owner ANHUI HUAYE CONSTR ENG GRP
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