Acrylic acid series nucleocapsid polymer emulsion and re-dispersible emulsion powder, and method for producing thereof

A polymer emulsion, acrylic technology, applied in the field of acrylic core-shell polymer emulsion and redispersible latex powder and its preparation, can solve the problem of limited dispersion, poor water resistance and ionic stability of redispersible latex powder, The performance of the film has not been reached, and the effect of long storage period, reduced packaging cost and good storage stability has been achieved.

Inactive Publication Date: 2008-05-07
SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a few countries in the world have developed polyvinyl acetate-vinyl "redispersible latex powder" with certain water dispersibility and film-forming ability, due to the limited degree of dispersion, the film-forming performance has not re

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment one: (1) Synthesis of acrylic core-shell polymer emulsion

[0042] The monomer composition is methyl methacrylate, butyl acrylate, 2-hydroxyethyl acrylate, 3-hydroxypropyl acrylate, methacrylic acid, and N-methylol acrylamide, and its component formula is as follows:

[0043] components

[0044] Step 1: Preparation of the initiator: adding the ammonium persulfate initiator into the deionized water, stirring well until all the solids are dissolved, and preparing an initiator solution with a concentration of 2.5% by mass.

[0045] Step 2: the preparation of core (shell) monomer pre-emulsion, first deionized water, emulsifier and anhydrous sodium carbonate are added in the reactor that stirrer is housed, stir and disperse for 20 minutes, add the core of above-mentioned quality ( The monomers of the shell) layer were stirred and dispersed for 30 minutes to obtain the core (shell) monomer pre-emulsion;

[0046] Step 3: To prepare the nuclear seed microe...

Embodiment 2

[0053] Embodiment two: (1) Synthesis of acrylic core-shell polymer emulsion

[0054] The monomer composition is propyl methacrylate, methyl methacrylate, butyl acrylate, hexyl acrylate, 2-hydroxybutyl acrylate, methacrylic acid, and N-methylol acrylamide, and its component formula is as follows:

[0055] components

(nuclear) mass (g)

(shell) mass (g)

Propyl methacrylate

Methyl methacrylate

Butyl acrylate

Hexyl acrylate

Acrylic acid-2-hydroxybutyl

ester

Methacrylate

N-Methylolacrylamide

Emulsifier

Anhydrous Sodium Carbonate

24

22

26.5

20

4.5

2

1

3.2

1.2

30

45

10

8

2

4

1

3.2

1.2

ammonium persulfate initiator

1

Deionized water

150

150

[0056] Step 1: the preparation of core (shell) monomer pre-emulsion, first deionized water, emulsifier and anhydrous sodium carbonate are added in the reactor that agitator is equipped wit...

Embodiment 3

[0065] Embodiment three: (1) Synthesis of acrylic core-shell polymer emulsion

[0066] The monomer composition is methyl methacrylate, ethyl methacrylate, butyl methacrylate, methyl acrylate, butyl acrylate, propyl acrylate, 2-hydroxyhexyl acrylate, methacrylic acid, N-methylol Acrylamide,

[0067] Its component formula is as follows:

[0068] Component

(nuclear) mass (g)

(shell) mass (g)

Methyl methacrylate

16

30

Hexyl methacrylate

18.5

28

Butyl methacrylate

Butyl acrylate

Methyl acrylate

Propyl acrylate

2-Hydroxyethyl Acrylate

ester

Methacrylate

N-Methylolacrylamide

Emulsifier

Anhydrous Sodium Carbonate

12

18

15

13

5

2

1.5

2.3

0.8

20

6

5

2

2

6

1

2.3

0.8

ammonium persulfate initiator

0.9

Deionized water

200

200

[0069] Step 1: the preparation of core (shell) monomer pre-emulsion, fir...

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PUM

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Abstract

The invention relates to a crylic acid nucleocapsid polymer emulsion and subdividable emulsion powder and the preparation method thereof. The emulsion is prepared by methacrylic acid alkyl ester, crylic acid alkyl ester, hydroxyalkyl ester, methacrylic acid, N-methylol acrylamide, an emulsifying agent and an initiator through the method of emulsion polymerization. The subdividable emulsion powder is prepared by the crylic acid nucleocapsid polymer emulsion, a protective colloid, and an anticaking agent through the spray method of emulsion. The subdividable emulsion powder of the invention has high fixed content (approximating 100 percent) and can reduce the difficulty of transportation and storage, and can be packed by using paper to reduce the packing cost, moreover, the storage stability is good and the storage period is long, and the subdividable emulsion powder of the invention can not go bad due to the water freezing or volatilization; the invention has the important thing that the subdividable emulsion powder can be rapidly dissolved in water and evenly distributed to repeatedly form the emulsion having the same performance as the primary matrix polymer emulsion, thereby being widely applied to zero VOC dry powder paint, terrace patch mortar, artesian flow flat plateau mortar, wall and floor tile bonding agent, sealed mortar, construction luting powder, plastering material, plastering gypsum, heat insulation and heated board bonding material, concrete interface agent, powder binding agent, powder paint, etc.

Description

technical field [0001] The invention relates to an acrylic core-shell polymer emulsion, a redispersible latex powder and a preparation method thereof. Background technique [0002] With the development of science and technology and the improvement of living standards, people's understanding of environmental protection and sustainable development is getting deeper and deeper. At present, polymer emulsions have been widely used in the coating industry, chemical building materials and industrial solid waste resource utilization. In the commonly used polymer emulsion, the solid content only accounts for about 50%, and contains a large amount of water. A large number of storage tanks are required to store and transport polymer emulsions, and the recycling of these plastic or iron storage tanks also requires a lot of manpower and material resources. This not only increases the cost, but also causes a waste of resources and pollutes the environment. At present, people design to ...

Claims

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Application Information

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IPC IPC(8): C08F220/10C08F2/24C08F2/44C08J3/16
Inventor 余淑华陆文雄杨瑞海吕兴文李柯
Owner SHANGHAI UNIV
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