Preparation of the Core-Shell Silicone-acrylic Latex and Its Film Formation Mechanism

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (12): 2923.

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Preparation of the Core-Shell Silicone-acrylic Latex and Its Film Formation Mechanism

MU Yuan-Chun, LI Xiao-Chen, QIU Teng, HE Li-Fan, ZHANG Sheng-Wen, LI Xiao-Yu*

Group of Emulsion Polymerization, School of Materials Science and Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China

Received:2010-11-29 Revised:2011-01-11 Online:2011-12-10 Published:2011-11-25
Contact: LI Xiao-Yu E-mail:lixy@mail.buct.edu.cn
Supported by:
国家自然科学基金(批准号: 50703002)和北京化工大学研究生科研创新基金(批准号: 09Ma007)资助.

Abstract

Abstract: We describe a method via transition emulsion polymerization for the synthesis of phase-separated polymer latex with multilayer core-shell(MLCS) morphology. We used four-step process emulsion polymerization for the preparation of MLCS latex. The acrylic esters were employed as the main monomers for the core and the shell of the latex, which was copolymerized by vinyl siloxane monomer. The transmission electron micrograph(TEM) and dynamic light scattering(DLS) methods were applied to characterize the MLCS emulsion. The core-shell silicone-acrylic structure was clearly shown in the TEM image, and the structure of the MLCS latex particles which contained three glass transition temperatures was further proved by the stochastic temperature-modulated-differential scanning calorimetry(TOPEM-DSC). The DLS analysis show that the average diameter and shells thickness of MLCS latex are corresponding to the TEM image. The whole process of the film formation was carried out using the Horus film formation analyzer. On this basis, the water-based coating with various auxiliary agents was prepared. The film performances are excellent, such as hardness, acetone resistance, water resistance, alcohol resistance, and indentation resistance.

Key words: Core-shell structure, Multilayer structure, Silicone-acrylic emulsion, Film formation

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MU Yuan-Chun, LI Xiao-Chen, QIU Teng, HE Li-Fan, ZHANG Sheng-Wen, LI Xiao-Yu*. Preparation of the Core-Shell Silicone-acrylic Latex and Its Film Formation Mechanism[J]. Chem. J. Chinese Universities, 2011, 32(12): 2923.

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Preparation of the Core-Shell Silicone-acrylic Latex and Its Film Formation Mechanism

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