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Core-shell structural elastic emulsion, coating containing emulsion and preparation method thereof

An elastic emulsion, core-shell type technology, applied in coatings containing core-shell type elastic emulsion and its preparation, in the field of core-shell type elastic emulsion, can solve the problems of poor dimensional stability, limited application, low glass transition temperature, etc., and achieve excellent Good elasticity, emulsion stability, and uniform particle size distribution

Inactive Publication Date: 2013-09-18
济南源键新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polybutyl acrylate has poor dimensional stability, and the glass transition temperature is too low, so it is not easy to form a film at room temperature
This severely limits its application in elastic coatings

Method used

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  • Core-shell structural elastic emulsion, coating containing emulsion and preparation method thereof
  • Core-shell structural elastic emulsion, coating containing emulsion and preparation method thereof
  • Core-shell structural elastic emulsion, coating containing emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: A preparation of a coating containing a core-shell elastic emulsion, the steps are as follows: 1. Preparation of poly(butyl acrylate-styrene) / polymethyl methacrylate core-shell emulsion

[0030] a. Preparation of poly(butyl acrylate-styrene) seed emulsion

[0031] Weigh 3.6g of butyl acrylate (BA), 0.96g of styrene (St), 0.072g of sodium dodecyl sulfate (SDS), 0.096g of OP-100, 0.048g of ethylene glycol dimethacrylate (EDMA), Put 0.072g of propyl methacrylate (ALMA) and 24g of deionized water in a four-neck flask. Raise the temperature to 80°C and stir for 20min. Weigh 0.144 g of the initiator potassium persulfate (KPS) into the flask, and stir for 15 min to obtain the seed emulsion.

[0032] b. Diameter expansion of poly(butyl acrylate-styrene) seed emulsion

[0033] According to the equal proportion of the preparation formula of the seed emulsion in step a, the proportion is enlarged by 8 times, and butyl acrylate, styrene, sodium lauryl sulfate, OP-10, ...

Embodiment 2

[0054] Embodiment 2: the preparation of a kind of coating that contains core-shell type elastic emulsion, the steps are as follows:

[0055] ① Preparation of poly(butyl acrylate-styrene) / polymethyl methacrylate core-shell emulsion

[0056] a. Preparation of poly(butyl acrylate-styrene) seed emulsion

[0057] Weigh 4.8g of butyl acrylate (BA), 0.72g of styrene (St), 0.024g of sodium dodecyl sulfate (SDS), 0.12g of OP-100, 0.072g of ethylene glycol dimethacrylate (EDMA), Put 0.024g of propyl methacrylate (ALMA) and 24g of deionized water in a four-neck flask. Raise the temperature to 80°C and stir for 20min. Weigh 0.168 g of initiator potassium persulfate (KPS) into the flask, stir for 15 min to obtain seed emulsion.

[0058] b. Diameter expansion of poly(butyl acrylate-styrene) seed emulsion

[0059] According to the preparation formula of the seed emulsion in step a, the equal ratio is enlarged by 9 times. Prepare a pre-emulsion with butyl acrylate, styrene, sodium lauryl...

Embodiment 3

[0080] Embodiment 3: the preparation of a kind of coating that contains core-shell type elastic emulsion, the steps are as follows:

[0081] ① Preparation of poly(butyl acrylate-styrene) / polymethyl methacrylate core-shell emulsion

[0082] a. Preparation of poly(butyl acrylate-styrene) seed emulsion

[0083] Weigh 6g of butyl acrylate (BA), 1.2g of styrene (St), 0.048g of sodium dodecyl sulfate (SDS), 0.144g of OP-100, 0.024g of ethylene glycol dimethacrylate (EDMA), and 0.048 g of propyl acrylate (ALMA) and 24 g of deionized water were placed in a four-necked flask. Raise the temperature to 80°C and stir for 20min. Weigh 0.192 g of the initiator potassium persulfate (KPS) and add it into the flask, and stir for 15 min to obtain the seed emulsion.

[0084] b. Diameter expansion of poly(butyl acrylate-styrene) seed emulsion

[0085] According to the preparation formula of the seed emulsion in step a, the preparation formula is enlarged by 10 times, and the pre-emulsion is s...

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Abstract

The invention relates to a core-shell structural elastic emulsion, a coating containing the emulsion and a preparation method thereof. The core-shell structural elastic emulsion is a poly(butyl acrylate-styrene) / polymethyl methacrylate core-shell structural polymer waterborne emulsion utilizing poly(butyl acrylate-styrene) as a core and polymethyl methacrylate as a shell. The preparation method comprises the steps of: adding an initiator emulsion into butyl acrylate, styrene, sodium dodecyl sulfate, an emulsifier OP-10, ethylene glycol dimethacrylate, propyl methacrylate and water to polymerize a poly(butyl acrylate-styrene) emulsion, and then, dripping the polymethyl methacrylate into the emulsion so as to polymerize the core-shell emulsion. The coating is prepared by mixing 30-50 parts of the core-shell emulsion, 15-20 parts of the water, 30-40 parts of a color filling and 4-7 parts of an addition agent. The synthesized core-shell structure has small particle diameter, uniform particle diameter distribution and good emulsion stability. The prepared coating has excellent elasticity, weather resistance, water resistance, stain resistance and high hardness.

Description

Technical field: [0001] The invention relates to a core-shell elastic emulsion, in particular to a core-shell elastic emulsion, a coating containing the core-shell elastic emulsion and a preparation method thereof, belonging to the technical fields of emulsion polymerization and coatings. Background technique: [0002] In recent years, with the continuous strengthening of environmental protection awareness and the increasing improvement of environmental protection laws and regulations, energy-saving and environmentally friendly water-based coatings have achieved rapid development. Compared with solvent-based coatings, water-based coatings have the advantages of low price, safe use, saving resources and energy, and reducing environmental pollution and public nuisance. Water-based acrylic paint is the fastest-growing and most diverse non-polluting paint among water-based paints. Acrylic coatings are widely used due to their excellent adhesion, water resistance, alkali resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F212/08C08F220/14C08F2/26C09D133/08C09D7/12
Inventor 石元昌孙立波何召品李晓李晓臣
Owner 济南源键新材料有限公司
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