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Aqueous polyurethane wood lacquer

A water-based polyurethane and wood paint technology, applied in polyurea/polyurethane coatings, latex paints, coatings, etc., can solve problems such as weak anti-ultraviolet ability, poor weather resistance, poor adhesion, etc., to avoid harmful gas residues, simplify Craftsmanship, strong adhesion effect

Inactive Publication Date: 2009-09-02
HANGZHOU ECEGE ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to overcome the problems of existing products such as poor adhesion on wood, poor weather resistance, weak anti-ultraviolet ability and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 150g of polyether diol and 170g of toluene diisocyanate into a 1000ml there-necked flask equipped with a thermometer, a condenser, and speed-adjustable stirring, heat up to 80°C and react for 2 hours, then cool down to 60°C and add 8g of trimethylolpropane, two 22g of methylolpropionic acid, 20g of diethylene glycol, and 200g of acetone were stirred at a temperature of 56°C for 5 hours, cooled to 40°C, added with 18g of triethylamine for neutralization for 2 minutes, and added with 1000g of deionized water at high speed Disperse and emulsify, extract volatile matter, and obtain a polyurethane emulsion product with a solid content of 35% and a product hardness of 2H-3H.

Embodiment 2

[0028] Add 160g of polyether diol and 158g of toluene diisocyanate to a 1000ml three-neck flask equipped with a thermometer, a condenser, and speed-adjustable stirring, and react at 80°C for 2 hours. 21g of methylpropionic acid, 20g of diethylene glycol, 200g of acetone, stirred at 56°C for 5 hours, cooled to 40°C, added 17.5g of triethylamine for neutralization for 2 minutes, added 950g of deionized water for high-speed dispersion and emulsification , extracting volatile matter to obtain an emulsion product with a solid content of 35%, and the product hardness is 1.5H-2H

Embodiment 3

[0030] Add 160g of polyether diol and 140g of toluene diisocyanate into a 1000ml three-necked flask equipped with a thermometer, condenser, and speed-adjustable stirring, react at 80°C for 2 hours, cool down to 60°C and add 8g of trimethylolpropane, 21g of dimethylolpropionic acid, 22g of diethylene glycol, and 190g of acetone were stirred at 56°C for 5 hours, cooled to 40°C, added with 18g of triethylamine for neutralization for 2 minutes, and added with 980g of deionized water for high-speed dispersion and emulsification. Evaporated substances are extracted to obtain an emulsion product with a solid content of 35%, and the hardness of the product is 1H-1.5H.

[0031] After formal testing, other indicators of the products in the above examples: abrasion resistance is 0.013, paint film adhesion is grade 0, and dry heat resistance is grade 1.

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Abstract

The invention relates to an aqueous polyurethane wood lacquer (latex) which aims at solving the problems of poor adhesive attraction on wood, poor resistance to weather, weak ultraviolet radiation resisting ability, higher cost, and the like of a prior product. The aqueous polyurethane wood lacquer is prepared by the steps of sufficiently stirring polyether dihydric alcohol and toluene di-isocyanate to form a performed polymer, adding dimethylol propionic acid dmpa, trimethylolpropane, diglycol and acetone to the preformed polymer to carry out viscosity-reducing and chain extension reaction, adding triethylamine to carry out quaterisation, adding deionized water to disperse emulsification, and stripping acetone.

Description

technical field [0001] The present invention relates to a polymer compound, specifically a water-based polyurethane wood paint (emulsion) prepared mainly from polyether diol and toluene diisocyanate, which can replace traditional oily paint and be widely used on the surface of wood, bamboo and rattan Finishing. Background technique [0002] Water-based polyurethane is a polymer material developed by replacing the organic solvent in traditional polyurethane with water as a dispersant medium. The coating formulated with it as the base material is non-toxic, non-flammable, and does not pollute the environment. [0003] For the synthesis of waterborne polyurethane, mainly use isocyanuric acid and polyester diol, polyether diol, polycarbonate diol such as: Eur.PatAppl.EP 1241199 Al 18 Sep 2002, 14pp.PCT Int.Appl. WO2002012407 Al 14 Feb 2002, 59pp, Eur.Pat.Appl.EP 1172389 Al 16 Jan 2002, 7pp patents mainly make waterborne polyurethane coatings with polyester diol and poly-2-buten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D5/02
Inventor 骆卫平
Owner HANGZHOU ECEGE ENVIRONMENTAL TECH
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