An auxiliary agent for inhibiting the diffusion of tannin in wood and its application method

A technology of wood and additives, applied in coatings, polyester coatings, polyurea/polyurethane coatings, etc., can solve problems such as poor inhibition effect, closed tannin, low hardness, etc.

Active Publication Date: 2020-07-28
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The additive contains an organic amine polymer component, which is a new alcohol-soluble material that can be quickly combined with tannin. Through the efficient chemical reaction between each component and tannin, the single The tannin is quickly fixed to solve a series of problems caused by the low hardness of the current water-based wood coatings, the sealing of the tannin, and the poor inhibition effect

Method used

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  • An auxiliary agent for inhibiting the diffusion of tannin in wood and its application method
  • An auxiliary agent for inhibiting the diffusion of tannin in wood and its application method
  • An auxiliary agent for inhibiting the diffusion of tannin in wood and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]Add 9.68g of ethanol, polyetheramine D230 (2.41g, 0.011mol) and ethylene glycol glycidyl ether (1.74g, 0.010mol) into the reactor, react at 60°C for 12 hours under stirring conditions, cool down, and filter An ethanol solution of the organic amine polymer is obtained. figure 1 It is the infrared spectrum of ethylene glycol glycidyl ether-polyether amine D230 condensation polymer, which shows that the organic condensate polymer has been successfully synthesized. Precipitate this solution in petroleum ether or anhydrous ether, collect the precipitate, and dry it in a vacuum oven to constant weight to obtain an organic amine polymer.

[0040] The organic condensate polymer is mixed with ethanol or absolute ethanol according to the mass ratio of 3:7, and dissolved. Add 5% calcium chloride (0.89g), stir evenly, and filter to obtain an auxiliary agent for inhibiting the diffusion of tannin for water-based woodware coating.

[0041] 40 parts of water-based acrylate resin, 50...

Embodiment 2

[0048] Add 6.23g of ethanol, diethylene glycol glycidyl ether (1.09g, 0.005mol) and isophorone diamine (1.70g, 0.01mol) into the reactor, add catalyst mass fraction 3% of 1,8 - Diazabicycloundec-7-ene (0.28g), reacted at 15°C under stirring conditions for 48 hours, and filtered to obtain an ethanol solution of the organic condensate polymer. Precipitate this solution in petroleum ether or anhydrous ether, collect the precipitate, and dry it in a vacuum oven to constant weight to obtain an organic amine polymer.

[0049] The organic condensate polymer is mixed with ethanol or absolute ethanol according to the mass ratio of 3:7, and dissolved. Add 3% calcium chloride (0.23g), stir evenly, and filter to obtain the auxiliary agent for inhibiting the diffusion of tannin for water-based woodware coating.

[0050] 50 parts of water-based alkyd resin, 42 parts of ethanol, and 8 parts of anti-tannin diffusion aid. After mixing the above components evenly, spray on wood with a water co...

Embodiment 3

[0056] In the reactor, 2,2'-diaminotriethyl ether and 1,6-hexanediol diglycidyl ether are fed according to the molar ratio of 1.01:1.00, and the mass concentration of the above mixture is adjusted to 67% with absolute ethanol, and added Triethylamine with a mass fraction of 3% was reacted at 50° C. under stirring for 6 hours. Cool down and filter to obtain an ethanol solution of the organic amine polymer. Precipitate this solution in petroleum ether or anhydrous ether, collect the precipitate, and dry it in a vacuum oven to constant weight to obtain an organic amine polymer.

[0057] The organic condensate polymer is mixed with ethanol or absolute ethanol according to the mass ratio of 3:7, and dissolved. Calcium chloride with a mass fraction of 2% is added, stirred evenly, and filtered to obtain an auxiliary agent for inhibiting the diffusion of tannin for water-based woodware coating.

[0058] 45 parts of water-based acrylic resin, 46 parts of absolute ethanol, and 9 parts...

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Abstract

The invention provides an aid for inhibiting the diffusion of tannin in wood and a use method thereof. The aid includes, by mass, 95 to 98% of an organic condensation amine polymer and 2 to 5% of calcium chloride. The aid is an alcohol-soluble new material with an organic condensation amine polymer component fast bonding with tannin. Through the highly efficient chemical reaction between the components and tannin, the tannin is fast fixed so that a series of problems caused by low hardness and poor tannin sealing and suppression effects of the existing water-based wood coating are solved.

Description

technical field [0001] The invention belongs to the technical field of complexing agents, and in particular relates to an auxiliary agent for inhibiting the diffusion of tannin in wood into water-based wood lacquer and its application method. Background technique [0002] Tannin, also known as tannic acid, is a water-soluble yellow to dark brown polyphenolic compound produced during plant growth. Traditional oil-based paints are used to seal the shielding effect of primers with high hardness and high cross-linking density to inhibit the diffusion of tannins into the topcoat; The thickness of the layer, the way of extending the diffusion path of tannin), avoiding the impact of the free diffusion of tannin on the topcoat. In recent years, due to pressure from environmental protection (mainly volatile organic compounds, VOC) and increasing awareness of human health, the application of high-sealing solvent-based wood coatings has become less and less, and the application of wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/26C09D7/65C09D175/04C09D133/04C09D167/08
CPCC08G65/2624C09D7/65C09D133/04C09D167/08C09D175/04
Inventor 郑耀臣鞠军姜梦林
Owner YANTAI UNIV
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