Unlock instant, AI-driven research and patent intelligence for your innovation.

SiO2 coated polyacrylate hybrid emulsion and preparation method as well as application thereof

A technology of polyacrylate emulsion and polyacrylate, which is applied in the direction of coating, etc., can solve the problems of oligomers and system instability, and achieve the effect of simple preparation process, best performance index, and good thermal stability

Inactive Publication Date: 2016-04-06
SOUTH CHINA UNIV OF TECH +1
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can avoid the "secondary agglomeration" problem that occurs during the emulsion polymerization of traditional nano-silica, but the rate of hydrolysis of the siloxane groups on the side chains of the polymer and added to TEOS to form SiOH groups is much higher than that of SiOH. The polycondensation reaction rate between the groups leads to the system containing more SiOH groups. During the storage process, it is easy to form silicon oligomers, which leads to the instability of the system.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • SiO2 coated polyacrylate hybrid emulsion and preparation method as well as application thereof
  • SiO2 coated polyacrylate hybrid emulsion and preparation method as well as application thereof
  • SiO2 coated polyacrylate hybrid emulsion and preparation method as well as application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of polyacrylate emulsion (PAES):

[0036] formula:

[0037] Table 1a

[0038]

[0039] Preparation method: add emulsifier, NaHCO 3 and an appropriate amount of deionized water, heat up to 75-80°C, then add 1 / 3 of the mass of the initiator, and start to drop 10% of the mass of the acrylate monomer (MMA, EA, MAA, HEMA) after 20 minutes of heat preservation to prepare the seed emulsion , after the system is in the blue phase and stabilizes for 30 minutes, continue to drop the remaining monomer and initiator aqueous solution (prepared into an aqueous solution with a mass concentration of 10%). Filter the discharge.

[0040] Emulsion properties: the average particle size of the emulsion is 73nm, pH=7.0, solid content: 51.5%.

[0041] (2) Hybrid emulsion (PAES / SiO 2 ) preparation:

[0042] formula:

[0043] Table 1b

[0044]

[0045] Preparation method: blend polyacrylate emulsion and TEOS, slowly add defoamer, thickener and wetting agent within ...

Embodiment 2

[0053] (1) Preparation of polyacrylate emulsion:

[0054] formula:

[0055] Table 2a

[0056]

[0057]

[0058] Preparation method: add emulsifier, NaHCO 3 and an appropriate amount of deionized water, heat up to 75-80°C, then add 1 / 3 of the initiator, and after 20 minutes of heat preservation, start to add 10% acrylate monomer dropwise to prepare the seed emulsion. After the system becomes blue phase and stabilize for 30 minutes, continue to drop Add the remaining monomer and the aqueous solution of the initiator (prepared into a 10% aqueous solution first), after the dropwise addition, raise the temperature to 82-85°C and keep it for 1 hour, then cool down and filter out.

[0059] Emulsion properties: the average particle diameter of the emulsion is 85nm, pH=7.0, solid content: 41.6%.

[0060] (2) Hybrid emulsion (PAES / SiO 2 Preparation of:

[0061] formula:

[0062] Table 2b

[0063]

[0064] Preparation method: blend polyacrylate emulsion and TEOS, slowly a...

Embodiment 3

[0069] (1) Preparation of polyacrylate emulsion:

[0070] formula:

[0071] Table 3a

[0072]

[0073] Preparation method: add emulsifier, NaHCO 3 and an appropriate amount of deionized water, heat up to 75-80°C, then add 1 / 3 of the initiator, and after 20 minutes of heat preservation, start to add 10% acrylate monomer dropwise to prepare the seed emulsion. After the system becomes blue phase and stabilize for 30 minutes, continue to drop Add the remaining monomer and the aqueous solution of the initiator (prepared into a 10% aqueous solution first), after the dropwise addition, raise the temperature to 82-85°C and keep it for 1 hour, then cool down and filter out.

[0074] Emulsion properties: the average particle size of the emulsion is 131nm, pH=7.0, solid content: 47.2%.

[0075] (2) Hybrid emulsion (PAES / SiO 2 ) preparation:

[0076] formula:

[0077] Table 3b

[0078]

[0079]

[0080]Preparation method: blend polyacrylate emulsion and TEOS, slowly add co...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses SiO2 coated polyacrylate hybrid emulsion and a preparation method as well as application thereof. The preparation method comprises the steps of firstly preparing polyacrylate emulsion; dropwise adding TEOS into the polyacrylate emulsion under room temperature, adding other auxiliaries under a stirring condition within 20-40min, stirring at room temperature for 30-90min, adding a neutralizer to adjust the pH of a system to be 8.5-9.0, and then filtering and packaging, thus obtaining PAES / SiO2 hybrid emulsion; the other auxiliaries include a defoaming agent, a thickening agent and a wetting agent; an organic phase and an inorganic phase form covalent bond through the bridging of a silane coupling agent, and ensure uniform dispersion of inorganic particles in organic components; Si-O-Si cross bond formed by the hybrid system through Sol-Gel reaction improves the chemical resistance of a film; a product has excellent water resistance and chemical resistance, high crosslinking degree and hardness, good film lustrousness and good heat stability.

Description

technical field [0001] The invention relates to a polyacrylate hybrid emulsion, in particular to a SiO 2 Encapsulated polyacrylate hybrid emulsion (PAES / SiO 2 ) and a preparation method thereof, the hybrid emulsion is used for water-based wood coatings. Background technique [0002] Waterborne acrylic paint has become the most widely used variety in waterborne paint. Acrylic resin has the characteristics of anti-corrosion, alkali resistance, water resistance, good color retention, no pollution, good construction performance and safe use; and it can be changed by changing the type of comonomer, crosslinking agent and adjusting the molar mass of the polymer. Coating properties. It is mainly used in architectural coatings, wood coatings, anodic electrophoretic coatings, and can also be used in antirust coatings, automotive coatings, leather finishing agents, etc. [0003] However, water-based acrylic coatings mainly have the disadvantages of hot stickiness and cold brittlen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/28C08F220/32C08F220/06C08F222/02C08F2/26C08F2/30C08K3/36C09D133/12C09D133/08C09D133/14C09D7/12
CPCC09D7/61C09D133/08C09D133/12C09D133/14C08F2/26C08F2/30C08F220/14C08F220/18C08F220/28C08F220/32C08K3/36C08F220/325C08F220/281C08F220/1804C08F222/02C08F220/06C08F222/06C08F220/1802
Inventor 瞿金清王彩朱延安
Owner SOUTH CHINA UNIV OF TECH