Method for preparing nano SiO2/polyurethane/acrylic ester composite emulsion and miniemulsion polymerization

A technology of acrylate and composite emulsion, which is applied in the treatment of dyed organosilicon compounds and fibrous fillers, etc. It can solve the problems of dynamic differences, achieve improved dispersion, improve mechanical properties, and improve the effect of "hot sticky and cold brittle"

Inactive Publication Date: 2011-04-13
ANHUI UNIVERSITY +1
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Problems solved by technology

Therefore, there are significant differences in kinetics

Method used

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  • Method for preparing nano SiO2/polyurethane/acrylic ester composite emulsion and miniemulsion polymerization
  • Method for preparing nano SiO2/polyurethane/acrylic ester composite emulsion and miniemulsion polymerization
  • Method for preparing nano SiO2/polyurethane/acrylic ester composite emulsion and miniemulsion polymerization

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Embodiment Construction

[0048] 1. Nano SiO 2 Particle preparation

[0049] Add 100g of absolute ethanol and 2g of ammonia water into the Erlenmeyer flask, and under magnetic stirring, drop the ethanol TEOS solution with a ratio of 1:1 into the Erlenmeyer flask at a constant pressure, control the dropping rate 1d / min, and the magnetic stirring speed 60r / min. After the dropwise addition, add 2g of ammonia water, 3.64g of water, and 1.74g of methacryloxypropyltrimethoxysilane KH-570 into the Erlenmeyer flask, and continue stirring for 24 hours, then dry the above alcohol solution in a vacuum oven , to obtain MPS-modified solid nano-silica.

[0050] 2. Preparation of polyurethane prepolymer

[0051] First, wash and dry the electric stirring rod, thermometer, reflux condenser and 250mL four-necked flask, and then install them for use. Weigh the dehydrated N210 into it, and then add diisocyanate (N210: IPDI molar ratio = 3:1) into it meteredly, and the two carry out initial polymerization reaction. He...

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Abstract

The invention relates to a method for preparing nano silicon dioxide (SiO2) / polyurethane / acrylic ester composite emulsion and miniemulsion polymerization. The method is characterized in that: the acrylic ester composite emulsion modified by the nano SiO2 and the polyurethane jointly is prepared by a miniemulsion polymerization method. According to the method, SiO2 is modified by using a silane coupling agent KH-570 under an alkaline condition, so that a hydrophilic surface of the composite emulsion is changed into a hydrophobic surface, and the dispersibility of the composite emulsion is improved greatly; stable nano SiO2 / polyurethane / acrylic ester composite emulsion can be prepared by a miniemulsion polymerization process; after the emulsion is formed into a film, the strength of a glue film is greatly improved, the glue film has soft handfeel, and the disadvantage that acrylic ester polymer is sticky in a hot state and is crisp in a cold state is overcome; and the decomposition mechanism of the composite emulsion is not changed.

Description

technical field [0001] The present invention relates to a kind of nano SiO 2 / Polyurethane / acrylic ester composite emulsion and the preparation method of miniemulsion polymerization thereof. Background technique [0002] SiO 2 / Research Progress of Acrylate / Polyurethane Composite [0003] Nanotechnology was gradually developed in the late 1980s and early 1990s. It belongs to the cutting-edge and interdisciplinary emerging disciplines, and its rapid development has brought about a revolutionary change in almost all industrial fields in the 21st century. Nano silicon dioxide (SiO 2 ) has a unique three-dimensional network structure. It is highly reactive due to its small particle size and high surface hydroxyl content. This feature allows it to be bonded or grafted with the molecular bonds of the polymer, and can also penetrate into the gaps between the polymer chains and large particle materials to form a unique three-dimensional silica network structure, thereby improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F2/26C08K9/06C08K3/36C09C1/28C09C3/12C08G18/67C08G18/48
Inventor 杨建军瞿贤超吴庆云张建安吴明元崔国庭罗照华
Owner ANHUI UNIVERSITY
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