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A quick-drying topcoat based on nano-modified alkyd resin and its preparation process

A technology of alkyd resin and nano-modification, applied in the field of coatings, which can solve the problems of low drying speed, low hardness, and long drying time of alkyd resin, and achieve fast surface drying speed, high hardness, and good scratch resistance.

Active Publication Date: 2022-04-05
山东齐鲁漆业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of low drying speed, long drying time and low hardness of alkyd resin, the object of the present invention is to provide a quick-drying topcoat based on nano-modified alkyd resin and its preparation process

Method used

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  • A quick-drying topcoat based on nano-modified alkyd resin and its preparation process
  • A quick-drying topcoat based on nano-modified alkyd resin and its preparation process
  • A quick-drying topcoat based on nano-modified alkyd resin and its preparation process

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preparation example Construction

[0074] The present invention also includes a kind of preparation method based on the quick-drying finish paint of nano-modified alkyd resin, comprises the following steps:

[0075] In parts by weight, 5-10 parts of itaconic acid modified styrene-acrylic resin, 50-60 parts of alkyd resin, 0.1-0.5 parts of defoamer, 30-40 parts of solvent, 0.5-1 part of film-forming aid and Mix and stir 0.2-0.5 parts of dispersant, grind until the fineness is less than 50 μm, add 4-8 parts of nano-silica modified hollow glass microspheres, and stir for 20-30 minutes to mix evenly to obtain a nano-modified alkyd resin-based dry finish;

[0076] The itaconic acid modified styrene-acrylic resin is prepared according to the following steps:

[0077] ① In parts by weight, dissolve and disperse 1 to 3 parts of polyoxyethylene polyoxypropylene ether, 1 to 3 parts of Tween, and 0.1 to 0.5 parts of disodium hydrogen phosphate into 20 to 30 parts of xylene to obtain an emulsifier buffer , refrigerated f...

Embodiment 1

[0090] A kind of alkyd resin is prepared according to the following steps:

[0091] Add 40kg of unsaturated fatty acid, 30kg of polyol, 10kg of phthalic anhydride, 0.02kg of hydroquinone (inhibitor) and 20kg of xylene into the reactor, slowly heat up to 150°C, and keep warm until the acid value is less than 10mg KOH / g, stop the reaction, lower the temperature, and add 25kg of cosolvent to obtain alkyd resin;

[0092] The unsaturated fatty acid is rapeseed acid;

[0093] The polyhydric alcohol is glycerol;

[0094] The co-solvent is dipropylene glycol dimethyl ether.

Embodiment 2

[0096] A kind of alkyd resin is prepared according to the following steps:

[0097] Add 25kg of ricinoleic acid, 25kg of rapeseed oleic acid, 20kg of polyols, 15kg of phthalic anhydride, 0.05kg of hydroquinone (inhibitor) and 30kg of xylene into the reactor, and slowly heat up to 160°C. Insulate the reaction until the acid value is less than 10mgKOH / g, stop the reaction, lower the temperature, and add 35kg of co-solvent to obtain the alkyd resin;

[0098] Described polyhydric alcohol is pentaerythritol;

[0099] The co-solvent is propylene glycol methyl ether acetate.

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Abstract

The invention discloses a quick-drying topcoat based on nano-modified alkyd resin and a preparation method thereof. It consists of the following raw materials in parts by weight: 5-10 parts of itaconic acid modified styrene-acrylic resin, 50 parts of alkyd resin ~60 parts, 0.2~0.5 parts of dispersant, 0.1~0.5 parts of defoamer, 4~8 parts of nano-silica modified hollow glass microspheres, 30~40 parts of solvent and 0.5~1 part of film-forming aid. The invented nano-modified alkyd resin quick-drying topcoat has fast surface-drying speed, and can be quickly surface-dried even in rainy weather. The low-temperature thick coating does not sag, the paint film has high hardness, good scratch resistance effect, and good weather resistance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a quick-drying topcoat based on nano-modified alkyd resin and a preparation process thereof. Background technique [0002] Due to the very high gloss of the paint film, alkyd resin is easy to cross-link with oxygen during construction, and has good self-drying property, so it has been widely used, but the structure of alkyd resin itself also leads to certain shortcomings: first , the drying of alkyd resin paint film mainly relies on the carbon-carbon double bond in the side chain fatty acid to undergo oxidative self-crosslinking reaction in the air, so the drying and curing speed of alkyd resin is slow and the drying time is long, especially at room temperature. It is not easy to dry, which limits its use; second, because the side chain of alkyd resin is a soft fatty chain, it has good flexibility, but the hardness of the paint film itself is low, and its water resistance and we...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/08C09D151/00C09D7/62C09D7/61C08F257/02C08F212/08C08F220/18C08F222/02
CPCC09D167/08C09D7/62C09D7/61C09D7/70C08F257/02C08K2201/011C08K2003/2296C08L51/003C08K9/06C08K3/22C08K7/28C08K9/02C08F212/08C08F220/1804C08F222/02
Inventor 武林华李丽孙振龙王亭亭丁晓东王明江段洪东
Owner 山东齐鲁漆业有限公司
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