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Hydroxyl acrylic emulsion for outdoor waterborne wood coating and preparation method thereof

A technology of hydroxyacrylic acid and wood coatings, applied in the direction of anti-corrosion coatings, etc., can solve the problems of poor aging resistance and chalking resistance of wood, poor comprehensive performance of coating films, and low cross-linking degree, and achieve strong anti-corrosion effect and good water resistance , the effect of high degree of cross-linking

Inactive Publication Date: 2017-04-12
SHANGHAI M LAND CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the polyacrylate emulsion used in the existing water-based wood coatings has a low degree of crosslinking and poor comprehensive properties of the coating film, which cannot effectively maintain the elasticity of the wood and prevent wood deformation, and the wood has poor aging resistance and chalking resistance. When encountering acid rain, smog, powder layer, and saline-alkali seaside, it is easy to crack, delaminate, and fall off.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The method for making a kind of outdoor water-based woodware coating of the present invention is:

[0027] 1. Weigh 60g of deionized water, 0.393g of co-emulsifier, 0.5g of sodium carbonate, and 0.2g of emulsifier, add them into the reactor and start stirring, controlling the speed to 400r / min.

[0028] 2. Fill the reactor with nitrogen protection, and raise the temperature of the system to 80°C under the conditions of nitrogen protection and constant agitator rotation speed.

[0029] 3. Make a solution of 0.3g of initiator and water at a ratio of 1:25 to 1:30 and add it to the reactor, and control the temperature of the system to maintain at 80°C.

[0030] 4. Add the component 1 material into the monomer dropping tank, control the dropping speed, and add it within 140 minutes. Component 1 includes 20 g of methyl methacrylate, 5 g of styrene, 18.33 g of n-butyl acrylate, 0.1 g of trimethylolpropane triacrylate, and 0.167 g of co-emulsifier.

[0031] 5. After component...

Embodiment 2

[0034] The method for making a kind of outdoor water-based woodware coating of the present invention is:

[0035] 1. Weigh 40g of deionized water, 0.075g of co-emulsifier, 0.3g of sodium carbonate, and 0.08g of emulsifier, add them into the reactor and start stirring, controlling the speed at 300r / min.

[0036] 2. Fill the reactor with nitrogen protection, and raise the temperature of the system to 80°C under the conditions of nitrogen protection and constant agitator rotation speed.

[0037] 3. Make a solution of 0.1g of initiator and water at a ratio of 1:25 to 1:30 and add it to the reactor, and control the temperature of the system to maintain at 80°C.

[0038] 4. Add the component 1 material into the monomer dropping tank, control the dropping speed, and add it within 130 minutes. Component 1 includes 5 g of methyl methacrylate, 0.625 g of styrene, 5 g of n-butyl acrylate, 0.05 g of trimethylolpropane triacrylate, and 0.025 g of co-emulsifier.

[0039] 5. After componen...

Embodiment 3

[0042] 1. Weigh 50g of deionized water, 0.285g of co-emulsifier, 0.4g of sodium carbonate, and 0.14g of emulsifier, add them into the reactor and start stirring, controlling the speed at 500r / min.

[0043] 2. Fill the reactor with nitrogen protection, and raise the temperature of the system to 80°C under the conditions of nitrogen protection and constant agitator rotation speed.

[0044] 3. Make a solution of 0.2g of initiator and water at a ratio of 1:25 to 1:30 and add it to the reactor, and control the temperature of the system to maintain at 80°C.

[0045] 4. Add the component 1 material into the monomer dropping tank, control the dropping speed, and add it within 150 minutes. Component 1 includes 15 g of methyl methacrylate, 3 g of styrene, 14.25 g of n-butyl acrylate, 0.075 g of trimethylolpropane triacrylate, and 0.105 g of co-emulsifier.

[0046] 5. After component 1 is fully added, add component 2 to the monomer dropping tank at the same dropping rate, and the total ...

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Abstract

The invention discloses a hydroxyl acrylic emulsion for an outdoor waterborne wood coating and a preparation method thereof. The preparation method comprises the following steps: 1, weighing deionized water, a co-emulsifier, sodium carbonate and an emulsifier, adding the weighed materials into a reactor and carrying out uniform mixing under stirring at a uniform speed; 2, introducing nitrogen into the reactor and allowing temperature to rise to 80 DEG C; 3, adding an initiator solution into the reactor; 4, weighing a certain amount of alkyl methacrylate, styrene, n-butyl acrylate, trimethylolpropane triacrylate and a co-emulsifier and adding the weighed materials into the reactor via a dropwise monomer addition groove; 5, weighing a certain amount of n-butyl acrylate, styrene, a co-emulsifier, a molecular-weight regulating agent, t-butylaminoethyl metacrylate and 2-(methacryloyloxy)ethyl acetoacetate and adding the weighed materials into the reactor via the dropwise monomer addition groove; and 6, cooling the obtained emulsion to room temperature and then carrying out filtering and discharging. The hydroxyl acrylic emulsion obtained in the invention has a high cross-linking degree, good water resistance and weatherability, high hardness and excellent scratch resistance and can be extensively promoted and applied.

Description

technical field [0001] The invention relates to the technical field of water-based wood coatings, in particular to a hydroxyacrylic acid emulsion for outdoor water-based wood coatings with high crosslinking degree and good coating film comprehensive performance and a preparation method thereof. Background technique [0002] Outdoor wood is widely used in our life, such as: outdoor wooden doors and windows, wooden houses, garden floors, wooden gazebos, wooden fences, wooden bridges, wooden boardwalks, roof wooden tiles, wooden sculptures, flower stands, wooden tables Chairs, landscape anti-corrosion wood products, etc. These outdoor wooden products are easily damaged due to wind, rain and sun. The common way to protect them is to paint them, but the general paint has poor permeability, poor sealing performance, and is not conducive to environmental protection. Later, with the development of production, outdoor water-based wood coatings appeared. Water-based wood coatings have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/08C09D5/08C08F220/18C08F220/14C08F212/08C08F222/14
CPCC08F220/18C08F220/1804C09D5/08C09D133/08C08F220/14C08F212/08C08F222/14
Inventor 王以元
Owner SHANGHAI M LAND CHEM CO LTD
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