Formaldehyde-purifying alkyd resin and preparation method thereof

An alkyd resin and formaldehyde technology, applied in coatings, polyester coatings, etc., can solve the problems of unsuitable promotion of biological purification methods, affecting the light transmittance of resins, and unclear mechanism of formaldehyde, achieving low toxicity and practicability. Strong and fluid effect

Active Publication Date: 2013-12-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical methods, such as the use of activated carbon to adsorb formaldehyde (Zheng Jingtang et al., CN1386577), although the effect of removing formaldehyde is obvious and rapid at the beginning, and the adsorption capacity is large, but the persistence is poor and easy to desorb.
Biodegradation methods, such as the use of plant rhizosphere absorption and microbial metabolism, have certain effects, but the mechanism of biological purification of formaldehyde is still unclear, and the problem of the decline in the absorption capacity of plants after absorbing pollutants has not been effectively resolved. Therefore, Biological aldehyde removal method is not suitable for promotion
Although the effect of using nano-photocatalytic materials to degrade formaldehyde has been confirmed in the laboratory, on the one hand, the nanoparticles are easy to agglomerate, which weakens the catalytic effect; on the other hand, when the material is added to the alkyd resin, it may affect the resin. Translucency

Method used

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  • Formaldehyde-purifying alkyd resin and preparation method thereof
  • Formaldehyde-purifying alkyd resin and preparation method thereof
  • Formaldehyde-purifying alkyd resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In parts by weight, prepare and purify formaldehyde alkyd resin according to the following composition:

[0043]

[0044] The preparation method of purifying formaldehyde alkyd resin, its operation steps are as follows:

[0045] (1) Under the protection of nitrogen, put glycerin, soybean oil fatty acid and phthalic anhydride into the reaction kettle in sequence, and raise the temperature to 100°C;

[0046] (2) Add p-toluenesulfonic acid, start stirring, raise the temperature to 220°C, and keep it warm for 2 hours;

[0047] (3) Cool down to 200°C, add cyclohexane, heat up to 250°C and reflux for 3 hours until the acid value is less than 7;

[0048] (4) Add ethyl acetate and butyl acetate, mix well to obtain alkyd resin;

[0049] (5) Add N‐β‐(aminoethyl)‐γ‐aminopropyltrimethoxysilane to the alkyd resin, react at 50°C for 10 minutes, and disperse evenly.

Embodiment 2

[0051] In parts by weight, prepare and purify formaldehyde alkyd resin according to the following composition:

[0052]

[0053]

[0054] The preparation method of purifying formaldehyde alkyd resin comprises steps as follows:

[0055] (1) Under the protection of nitrogen, put glycerin, castor oil fatty acid and phthalic anhydride into the reaction kettle in sequence, and raise the temperature to 130°C;

[0056] (2) Add p-toluenesulfonic acid, start stirring, raise the temperature to 260°C, and keep it warm for 1 hour;

[0057] (3) Cool down to 220°C, add cyclohexane, heat up to 280°C and reflux for 1 hour until the acid value is less than 7;

[0058] (4) Add 200# solvent oil and mix well to obtain alkyd resin;

[0059] (5) Add adipic acid dihydrazide to the alkyd resin and react at 55°C for 15 minutes to obtain a modified alkyd resin;

[0060] (6) Add nano-silica and aluminum oxide to the modified alkyd resin, and disperse evenly to obtain the product.

Embodiment 3

[0062] In parts by weight, prepare and purify formaldehyde alkyd resin according to the following composition:

[0063]

[0064] The preparation method of purifying formaldehyde alkyd resin, its operation steps are as follows:

[0065] (1) Under the protection of nitrogen, put glycerin, soybean oil fatty acid and maleic anhydride into the reaction kettle in sequence, and raise the temperature to 130°C;

[0066] (2) Add solid acid, start stirring, raise the temperature to 220°C, and keep it warm for 3.5 hours;

[0067] (3) Cool down to 210°C, add propyl acetate, heat up to 265°C and reflux for 1.5 hours until the acid value is less than 7;

[0068] (4) Add butyl acetate and mix well to obtain alkyd resin;

[0069] (5) Add polyamide to the alkyd resin and react at 25°C for 3 minutes to obtain a modified alkyd resin;

[0070] (6) Add nano silicon dioxide to the modified alkyd resin, and disperse evenly to obtain the product.

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Abstract

The invention discloses formaldehyde-purifying alkyd resin and a preparation method thereof. The formaldehyde-purifying alkyd resin is prepared through reaction of polyhydric alcohols, polyatomic acids, organic solvents, formaldehyde removing agents and anion generating agents. The method includes during preparation, by the protection of nitrogen, firstly adding the polyhydric alcohols and the polyatomic acids, and raising the temperature to 100 to 160 DEG C; adding catalyst, raising the temperature to 220 to 260 DEG C, and keeping the temperature for 1 to 3.5 hours; control the temperature from 200 to 220 DEG C, adding water-carrying agents, and raising the temperature to 250 to 280 DEG C to flow back until the acid value is lower than 7; adding the organic solvents and mixing evenly to obtaining the alkyd resin; adding the formaldehyde removing agents, and reacting at the temperature of 25 DEG C to 80 DEG C for 3 to 30 minutes to obtain modified alkyd resin, namely the formaldehyde-purifying alkyd resin. When the formaldehyde-purifying alkyd resin reacts with the formaldehyde, a resulting product is not volatile and non-toxic, and secondary contamination is eliminated; the preparation process in simple, requirement for equipment is low, and the formaldehyde-purifying alkyd resin is adaptable to mass production.

Description

technical field [0001] The invention relates to an alkyd resin, in particular to a preparation method of the alkyd resin with the effect of removing formaldehyde; it belongs to the technical field of air pollutant purification. Background technique [0002] Formaldehyde is a flammable, highly reactive, irritating, colorless, toxic gas at room temperature. Most of the harm to the human body is exogenous formaldehyde. Exogenous formaldehyde can be roughly divided into two categories, one is formaldehyde when in contact with humans, and the other is formaldehyde that is metabolized by substances such as methanol and methylamine when in contact with humans. Common sources of formaldehyde include: construction and decoration materials, such as wood panels (particleboard, blockboard, plywood, medium density fiberboard, large core board, etc.), wood adhesives, decoration materials that may emit formaldehyde (such as wallpaper) and furnishings (such as chemical fiber carpets), etc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C08G63/49C08G63/52C08G63/21C08K3/22C08K3/36C08L67/08C09D167/08C09D7/12
Inventor 张心亚何贲健谢德龙
Owner SOUTH CHINA UNIV OF TECH
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