Epoxy modified alkyd resin and its high hardness fast reaction coating

An alkyd resin, epoxy modification technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of difficult and complete transesterification, waste of manufacturers, environmental hazards, etc., and achieve good fullness and adhesion. Good and fast response

Inactive Publication Date: 2014-02-05
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the modified resin is synthesized by this method, the transesterification is extremely difficult to react completely, and the by-products produced by th

Method used

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  • Epoxy modified alkyd resin and its high hardness fast reaction coating
  • Epoxy modified alkyd resin and its high hardness fast reaction coating
  • Epoxy modified alkyd resin and its high hardness fast reaction coating

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Experimental program
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Effect test

Embodiment 1

[0048] Embodiment 1: the preparation of epoxy modified alkyd resin

[0049] (1) According to the formula in Table 1, put the polyhydric alcohol and polybasic acid into the reactor, heat up to 120-130°C and add xylene, start stirring after the reactants are completely dissolved, keep warm for 1-2 hours until the reaction is stable, then continue to heat up to 160°C ~180°C, keep warm for 4~5 hours until the acid value is 40mgKOH / g to stop the reaction, cool down to 100~110°C and vacuum until no xylene is drawn out to obtain alkyd resin.

[0050] (2) According to the formula in Table 1, put epoxy resin and alkyd resin into the reaction kettle, then put in toluene, triphenylphosphine and benzyldimethylamine respectively, raise the temperature to 105-115°C, keep it warm for 4 hours, and then use ethyl acetate Dilute the ester and butyl acetate to a solid content of 65%, and filter the material to obtain an epoxy-modified alkyd resin.

[0051] The preparation formula table of table 1...

Embodiment 2

[0054] Embodiment 2: the preparation of epoxy modified alkyd resin

[0055] (1) According to the formula in Table 2, put the polyol and polyacid into the reactor, heat up to 120-130°C and add xylene, start stirring after the reactants are completely dissolved, keep warm for 1-2 hours until the reaction is stable, then continue to heat up to 160°C ~180°C, keep warm for 4-5 hours until the acid value is 96mgKOH / g to stop the reaction, cool down to 100-110°C and vacuum until no xylene is drawn out to obtain alkyd resin.

[0056] (2) According to the formula in Table 2, put epoxy resin and alkyd resin into the reaction kettle, then put in toluene and tetrabutylphosphonium acetate respectively, raise the temperature to 105-115°C, keep it warm for 3 hours, and use 200# solvent oil and Butyl acetate was diluted to a solid content of 65%, and the material was filtered to obtain an epoxy-modified alkyd resin.

[0057] The preparation formula table of table 2 epoxy modified alkyd resin...

Embodiment 3

[0060] Embodiment 3: the preparation of epoxy modified alkyd resin

[0061] (1) According to the formula in Table 3, put the polyol and polyacid into the reaction kettle, heat up to 120-130°C and add xylene, start stirring after the reactants are completely dissolved, keep warm for 1-2 hours until the reaction is stable, then continue to heat up to 160°C ~180°C, keep warm for 4~5 hours until the acid value is 68mgKOH / g to stop the reaction, cool down to 100~110°C and vacuum until no xylene is drawn out to obtain alkyd resin.

[0062] (2) According to the formula in Table 3, put epoxy resin and alkyd resin into the reaction kettle, then put in toluene, triethanolamine and chromium acetylacetonate respectively, raise the temperature to 105-115°C, keep it warm for 2 hours, and use xylene, ethyl acetate Dilute it with 100# solvent oil until the solid content is 65%, and filter the material to obtain an epoxy-modified alkyd resin.

[0063] The preparation formula table of table 3 ...

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Abstract

Belonging to the field of epoxy resin coatings, the invention discloses an epoxy modified alkyd resin and its high hardness fast reaction coating. The epoxy modified alkyd resin is prepared by the method of: (1) mixing polyhydric alcohol with polyprotic acid, adding xylene, then performing heating reaction for 1-2h, raising the temperature to completely react, thus obtaining alkyd resin; (2) mixing epoxy resin, alkyd resin and a catalyst, performing heating reaction for 2-4h, carrying out filtering and discharging, thus obtaining epoxy modified alkyd resin, which has the advantages of good adhesion (0 level), good fullness, strong toughness (2mm), high epoxy resin mechanical strength (6H), and excellent corrosion resistance. The high hardness fast reaction coating made of the epoxy modified alkyd resin has the characteristics of high hardness, good toughness and fast drying speed (4h). According to the invention, the raw materials are easily available, and the process is simple. The prepared product has a high solid content and good leveling property, and is easy to achieve film coating.

Description

technical field [0001] The invention belongs to the field of epoxy resin coatings, in particular to an epoxy-modified alkyd resin and a high-hardness quick-response coating. Background technique [0002] The surface coating of wood furniture through different processes can protect the furniture, make the loose substrate stronger, and make the furniture have good water resistance, wear resistance, corrosion resistance and other properties. It is not easy to paint wood to achieve the ideal coating purpose. There are several important reasons: (1) The uneven density and porosity of wood requires good adhesion of the paint. (2) The complexity and variability of the processing environment and the use environment require the coating to have high hardness and good wear resistance to ensure the durability of the paint film. (3) Compared with special coatings, due to the need to use them under extreme conditions, the coatings are required to have the characteristics of high temperat...

Claims

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Application Information

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IPC IPC(8): C08G63/91C08G81/00C09D175/06C09D7/12
Inventor 何宇陈荣许凯陈鸣才
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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