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Single-component air-drying water-based sealing agent for woodware and preparation method thereof

A water-based sealant, one-component technology, used in coatings, polyurea/polyurethane coatings, etc., can solve problems such as damage to wood and paint film, color bleeding and migration of wood swells, and inability to prevent wood swells, etc. Damage and oil seepage effects

Inactive Publication Date: 2018-09-04
广东海顺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the sealing primer produced in the industry cannot prevent wood from swelling. The common practice is to remove the swelling ribs, which will damage the wood and paint film. Our anti-swelling rib anti-tannic acid sealing primer can effectively Solve the problem of bleeding and migration of wood expansion bars caused by paint film coating on the wood surface

Method used

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  • Single-component air-drying water-based sealing agent for woodware and preparation method thereof
  • Single-component air-drying water-based sealing agent for woodware and preparation method thereof
  • Single-component air-drying water-based sealing agent for woodware and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Mix polyols and isocyanate monomers to control the reaction temperature at 85°C, react for 1.5h, add acetone and dimethylol propionic acid and continue to react at 80°C for 1h, add BDO and HEA at 70°C for 1.5h, cool down to 35°C, add Neutralize with triethylamine, add water to disperse, remove acetone at 60°C and 1333KPa, and copolymerize this aqueous polyurethane dispersion with acrylic monomer to obtain the acrylic-polyurethane mixed emulsion, that is, self-drying water-based sealant.

Embodiment 2

[0041] Mix polyols and isocyanate monomers to control the reaction temperature at 90°C, react for 2 hours, add acetone and dimethylol propionic acid and continue to react at 85°C for 1.5 hours, add BDO and HEA at 75°C for 1.5 hours, cool down to 35°C, add Neutralize with triethylamine, add water to disperse, remove acetone at 60°C and 1333KPa, and copolymerize the aqueous polyurethane dispersion with acrylic monomer to obtain the acrylic-polyurethane mixed emulsion.

Embodiment 3

[0043] Mix polyols and isocyanate monomers to control the reaction temperature at 85°C, react for 2 hours, add acetone and dimethylol propionic acid and continue to react at 85°C for 1.5 hours, add BDO and HEA at 75°C for 1.5 hours, cool down to 35°C, add Neutralize with triethylamine, add water to disperse, remove acetone at 60°C and 1333KPa, and copolymerize the aqueous polyurethane dispersion with acrylic monomer to obtain the acrylic-polyurethane mixed emulsion.

[0044] The present invention also provides a single-component self-drying water-based sealant for wood prepared by the above method. The mass fraction of PUA is 85-95%, the mass fraction of dipropylene glycol methyl ether is 2-4%, the mass fraction of dipropylene glycol butyl ether is 2-4%, the mass fraction of leveling agent is 0.2-0.4%, and the mass fraction of wetting agent The fraction is 0.3-0.5%, the defoamer mass fraction is 0.2-0.4%, and the rest is water.

[0045] The single-component self-drying water-...

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Abstract

The invention discloses a single-component air-drying water-based sealing agent for woodware. Polyhydric alcohols and an isocyanate monomer are mixed for a reaction for a period of time, a certain amount of acetone and dimethylolpropionic acid are added for a continuous reaction for a period of time; BDO and HEA are added for a reaction for a period of time, and then cooling is performed; triethylamine is added for neutralization, water is added for dispersion, acetone is removed, and a waterborne polyurethane dispersion is obtained; the waterborne polyurethane dispersion and an acrylic monomer are copolymerized to obtain acrylic acid-polyurethane mixed emulsion. The acrylic acid-polyurethane mixed emulsion prepared through the method has the dense film formation effect, the surface of wood can be well wrapped, and the phenomenon that the surface of a paint film is damaged due to the fact that much water in water paint is absorbed and serious base material rib expansion is caused is avoided. Meanwhile, on the basis of reasonable auxiliaries, finally, when paint is used on the surface of wood, the problems that wood rib expansion damage is caused and oil leakage and color changing are caused can be effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a single-component self-drying water-based sealant for wood used in the water-based wood paint industry and a preparation method thereof. Background technique [0002] At present, water-based wood lacquer coatings have the protective and decorative functions of ordinary solvent-based coatings, but in occasions with high decorative requirements, they cannot achieve high fullness and require solvent-based coatings to achieve. The main reason is that general water-based wood paints will cause the problems of tendon expansion, color bleeding and oil leakage of the substrate during the water-based wood coating process. [0003] Most European and American countries have achieved water-based wood paint technology. Compared with the domestic solvent-based paints currently used, water-based wood paints are currently only used in relatively small low-end applications. The main pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C08G18/32C08G18/34C08G18/67
CPCC08G18/3206C08G18/348C08G18/672C09D175/14
Inventor 易承志程蕾
Owner 广东海顺新材料科技有限公司
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