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Self-layering organic-inorganic nano composite emulsion and method for preparing same

A technology of inorganic nano-composite emulsion, applied in the direction of coating, etc., can solve the problems of paint film scratch resistance, poor flexibility and wear resistance, application fields that are difficult to meet high performance requirements, poor anti-adhesion, etc. , to achieve excellent slippery feeling, low viscosity and improved performance

Inactive Publication Date: 2014-07-09
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, traditional acrylate emulsions are relatively simple in composition. Due to their own structural limitations, these simple structural units are difficult to meet some application fields with high performance requirements.
It is mainly manifested in the hot stickiness and cold brittleness after the emulsion film is dried, poor anti-adhesiveness, and poor scratch resistance, flexibility, and wear resistance of the paint film. It is mainly used as a medium and low-end product in the market.

Method used

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  • Self-layering organic-inorganic nano composite emulsion and method for preparing same
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  • Self-layering organic-inorganic nano composite emulsion and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Seed emulsion polymerization, inorganic components are added during seed emulsion polymerization, the specific steps are as follows:

[0044] ① Preparation of pre-emulsion: at room temperature, add 65% of the mass of emulsifier, 30% of the mass of deionized water, mixed monomers and dodecyl mercaptan into the pre-emulsification tank, and keep stirring at a stirring rate of 500rpm 15min obtains monomer pre-emulsion;

[0045] ②Preparation of seed emulsion: Add 35% of the mass of emulsifier, 50% of the mass of deionized water, ammonium bicarbonate, and inorganic components into the polymerization kettle, mix evenly at a stirring rate of 300rpm and heat up; when the temperature reaches 60°C , with a constant stirring rate of 100rpm, add 10% of the mass of the monomer pre-emulsion; add an initiator solution composed of 33% of the mass of the initiator and 5% of the mass of deionized water, continue to heat up to 82±1°C, and keep warm 15min obtains seed emulsion;

[0046] ③...

Embodiment 2～4

[0051] Repeat the method of Example 1 with the content of each component specified in Table 1 below, and the test results are shown in Table 2.

[0052] Table 1

[0053]

[0054]

[0055] Table 2

[0056]

Embodiment 5

[0058] For seed emulsion polymerization, the inorganic components are added during heat preservation. The specific steps are as follows:

[0059] ① Preparation of pre-emulsion: At room temperature, add 54% of the mass of the emulsifier, 37% of the mass of deionized water, all mixed monomers and dodecyl mercaptan into the pre-emulsification tank, and continue at a stirring rate of 500rpm Stir for 15min to obtain monomer pre-emulsion;

[0060] ②Preparation of seed emulsion: Add 46% of the mass of emulsifier, 48% of the mass of deionized water, and ammonium bicarbonate into the polymerization kettle, mix evenly at a stirring rate of 300rpm and heat up; when the temperature reaches 60°C, keep stirring at a constant rate 100rpm, add 15% of the mass of the monomer pre-emulsion; add an initiator solution composed of 40% of the mass of the initiator and 2% of the mass of deionized water, continue to heat up to 82±1°C, and keep warm for 15min to obtain a seed emulsion ;

[0061] ③Dro...

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Abstract

The invention relates to self-layering organic-inorganic nano composite emulsion and a method for preparing the same. The emulsion is made of mixed monomers, inorganic components and auxiliary components. The self-layering organic-inorganic nano composite emulsion is obtained by generating (or precipitating) organic nano particles inside (or on the surface) of latex particles in situ while introducing double-bond polysiloxane, and the emulsion is high in solid content, low in viscosity and high in storage stability. Due to differences of surface energy and compatibility (solubility parameters) between polysiloxane and other components in filming of emulsion, the polysiloxane molecules migrate to be enriched to a coating surface to form a self-layering structure.

Description

technical field [0001] The invention relates to a self-layering organic-organic nanocomposite emulsion, which can be used to prepare various coating materials with excellent performance, and can be applied in construction, metal, wood processing, furniture manufacturing and other industries, and belongs to the technical field of new materials and coatings. Background technique [0002] With the improvement of people's living standards and the enhancement of environmental protection awareness, polymers of acrylic acid and its esters and styrene are not only required to have excellent performance, but also higher requirements are put forward in terms of energy saving, environmental protection, and low carbon. Acrylic monomers have carbon-carbon unsaturated double bonds, which can be polymerized to form polyacrylates. Its main chain is carbon-carbon chain, which has high light, heat and chemical stability, so acrylate emulsion has good weather resistance, stain resistance, solv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F290/14C08F290/06C08F220/18C08F220/14C08F212/08C08F2/44C08F2/24C08K3/36C09D151/08
Inventor 刘国军张桂霞刘素花刘俊龙朱云峰
Owner DALIAN POLYTECHNIC UNIVERSITY
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