Coating with low-VOC sucrose polyester-modified alkyd emulsion as main material

A technology of sucrose polyester and alkyd emulsion, which is applied in the field of coatings and can solve problems such as impact on the environment and human health, and harm to the environment and human health

Active Publication Date: 2015-03-25
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are VOCs (volatile organic compounds) in alkyd resin coatings that are harmful to the environment and human health.
Traditional alkyd resin coatings are mostly solvent-based and

Method used

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  • Coating with low-VOC sucrose polyester-modified alkyd emulsion as main material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix 24% sucrose polyester, 30% alkyd resin and 6% TX-10, put it into the magnetic rotor, heat and stir at 2.5r / min for 5min; put in 40% deionized water and heat to 75°C; take out Finally, emulsify under the high-speed shearing machine at a speed of 10000r / min, and add deionized water until the phase inversion; after the phase inversion, add the remaining water and reduce the speed to 5000r / min, continue emulsification for 5 minutes, and then finish it for later use.

Embodiment 2

[0022] Mix 30% sucrose polyester, 20% alkyd resin, 1.5% SDBS, 3.5% OP-10, put it into the magnetic rotor, heat and stir at 2.5r / min for 5min; add 45% deionized water at the same time and heat to 75°C; take it out and emulsify under a high-speed shearing machine at a speed of 10000r / min, and add deionized water at the same time until the phase inversion; after the phase inversion, add the remaining water and reduce the speed to 5000r / min, and continue emulsification for 5 minutes before ending. spare.

[0023] Coating embodiment one:

[0024] Stir at 500r / min, mix 0.4% dispersant and 9% water evenly, add 0.2% wetting agent and 0.1% rheological agent, add 9% titanium dioxide under stirring, then increase the speed to 1000r / min for high-speed dispersion 10 minutes; add 78% of the above emulsion to the pigment dispersion, stir at a high speed at a speed of 1000r / min, add 0.1% defoamer and 1.5% drier in sequence, and disperse for 5 minutes; add 0.4% pH regulator to adjust the pH t...

Embodiment example 2

[0026] Stir at 500r / min, mix 5% dispersant and 8.9% water evenly, add 0.1% wetting agent and 0.1% rheological agent, add 8.9% titanium dioxide under stirring, then increase the speed to 1000r / min for high-speed dispersion 10 minutes; add 73.7% of the above emulsion into the pigment dispersion, stir at a high speed at a speed of 1000r / min, add 0.1% defoamer and 2% drier in sequence, and disperse for 5 minutes; add 0.3% pH regulator to adjust the pH to 8.27, then add 1% thickener and mix evenly, continue to disperse for 20 minutes and then filter to obtain the low-VOC sucrose polyester modified alkyd emulsion as the main ingredient coating.

[0027] The sucrose polyester modified emulsion prepared by emulsion embodiment one of the present invention and coating embodiment one is compared with the coating prepared and the existing water-based alkyd resin coating, and the results are as follows 2 tables:

[0028] project SPE modified alkyd emulsion Unmodified waterborn...

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Abstract

The invention discloses a sucrose polyester-modified alkyd emulsion which is prepared from the following raw materials by percentage: 20%-40% of sucrose polyester, 20%-40% of alkyd resin, 5%-10% of an emulsifier and 30%-50% of deionized water. The preparation method comprises the following steps: heating a magnetic stirring water bath pan to 70-80 DEG C; mixing the sucrose polyester with the alkyd resin, and then putting into a magnetic rotor; heating and stirring for 50 minutes at the speed of 2.5r/min; putting into deionized water and heating together; taking out the mixture, emulsifying at the rotating speed of 10,000r/min by virtue of a high-speed shearing machine, simultaneously adding the deionized water until phase inversion; and adding the residual water after phase inversion, reducing the rotating speed to 5,000r/min, and further emulsifying for 5 minutes. The invention also discloses a coating with the low-VOC sucrose polyester-modified alkyd emulsion as a main material, and a preparation method of the coating.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a coating with a low-VOC sucrose polyester modified alkyd emulsion as the main ingredient. Background technique [0002] Alkyd resin is one of the earliest developed, largest and most widely used synthetic coatings. It has good weather resistance, good adhesion, bright and plump paint film, and convenient construction. It is widely used in construction, bridges, vehicles, ships and other industries. However, there are VOCs (volatile organic compounds) in alkyd resin coatings that are harmful to the environment and human health. Traditional alkyd resin coatings are mostly solvent-based and contain a large amount of organic solvents. These organic solvents evaporate into the atmosphere during the construction process, which has a serious impact on the environment and human health. There are 10 million tons of volatile organic compounds (VOC) emitted from coatings into the atmosphere every ...

Claims

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Application Information

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IPC IPC(8): C09D167/08C09D7/12
CPCC08L2205/025C08L2205/035C09D7/61C09D7/62C09D7/63C09D7/65C09D167/08C08L67/08C08K13/06C08K9/04C08K3/346C08K2003/2241
Inventor 刘今强朱佩王际平张玲玲
Owner ZHEJIANG SCI-TECH UNIV
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