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Short-oil alkyd resin with low viscosity and high solid content, alkyd amino paint prepared therefrom and preparation method

An alkyd resin, solid content technology, used in polyester coatings, coatings, etc., can solve the problems of long baking time, high cost, high energy consumption, and achieve bright colors, high solid content, and low viscosity.

Active Publication Date: 2016-05-11
西北永新涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, most of the paint films of alkyd amino coatings made of alkyd resins require high-temperature baking and curing. Generally, the baking temperature is above 120°C, and the baking time is more than 20 minutes, which consumes a lot of energy.
[0007] The existing low-temperature curing amino baking varnish production method belongs to acrylic amino paint, and its cost is relatively high, its baking time is slightly longer, and its energy consumption is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1, prepare alkyd resin, formula is:

[0043] 20g soybean oil, 14.5g glycerin, 0.006g lithium hydroxide, 0.1g benzoic acid, 27g phthalic anhydride, 2g No. 1 solvent xylene, 28g butyl ester, 0.01g silicone oil.

[0044] The method includes the following steps:

[0045] A. Add vegetable oil fatty acids and polyols into the reaction kettle, pass in carbon dioxide gas, turn on the stirring at the same time (stirring speed is 90 rpm) and raise the temperature to 120°C, stop stirring, add catalyst, start stirring, and continue to heat up to 238°C , keep alcoholysis;

[0046] B. After one hour of alcoholysis, start sampling to measure alcohol tolerance, and then take samples every 15 minutes until alcoholysis is transparent as the end point; (sampling is prepared according to volume ratio, sample: 95% ethanol=1:9, transparent at 25°C)

[0047] C. After passing the alcoholysis, cool down to 178°C, add benzoic acid and acid anhydride, No. 1 solvent and silicon leveli...

Embodiment 2

[0051] Embodiment 2, prepare alkyd resin, formula is:

[0052]16.5g soy acid, 0.1g diethylene glycol, 9.9g glycerin, 0.001g lithium hydroxide, 2.9g benzoic acid, 0.1g trimellitic anhydride, 20.4g phthalic anhydride, 4g xylene, 5g butyl ester, 31g No. 150 solvent naphtha, 0.1g Deqian 435.

[0053] The method includes the following steps:

[0054] A. Add vegetable oil fatty acids and polyols into the reaction kettle, pass in carbon dioxide gas, turn on the stirring at the same time (stirring speed is 110 rpm) and raise the temperature to 130°C, stop stirring, add catalyst, start stirring, and continue to heat up to 242°C , keep alcoholysis;

[0055] B. After one hour of alcoholysis, start sampling to measure alcohol tolerance, and then take samples every 15 minutes until alcoholysis is transparent as the end point; (sampling is prepared according to volume ratio, sample: 95% ethanol=1:9, transparent at 25°C)

[0056] C. After passing the alcoholysis, cool down to 178-182°C, a...

Embodiment 3

[0060] Embodiment 3, prepare alkyd resin, formula is:

[0061] 15g soy acid, 5.5g pentaerythritol, 9.5g glycerin, 0.01g lead oxide, 3g benzoic acid, 1g maleic anhydride, 20.7g phthalic anhydride, 5g xylene, 30g No. 150 solvent oil, 0.05g BYK141.

[0062] The method includes the following steps:

[0063] A. Add vegetable oil fatty acids and polyols into the reaction kettle, pass in carbon dioxide gas, turn on the stirring at the same time (stirring speed is 100 rpm) and raise the temperature to 125°C, stop stirring, add catalyst, start stirring, and continue to heat up to 240°C , keep alcoholysis;

[0064] B. After one hour of alcoholysis, start sampling to measure alcohol tolerance, and then take samples every 15 minutes until alcoholysis is transparent as the end point; (sampling is prepared according to volume ratio, sample: 95% ethanol=1:9, transparent at 25°C)

[0065] C. After passing the alcoholysis, cool down to 180°C, add benzoic acid and acid anhydride, No. 1 solven...

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Abstract

The invention discloses low-viscosity high-solid-content short oil alkyd resin, an amino-alkyd coating prepared from the low-viscosity high-solid-content short oil alkyd resin, as well as a preparation method. The amino-alkyd coating is prepared from the following raw materials: 58-70 parts of alkyd resin, 20-32 parts of amino resin, 0.05-1 part of leveling agent and 5-10 parts of solvent, wherein the alkyd resin is prepared from the following raw materials: 15-20 parts of plant oil fatty acid, 10-15 parts of polyhydric alcohol, 0.001-0.01 part of a catalyst, 0.1-3 parts of benzoic acid, 20.5-27 parts of acid anhydride, 35-50 parts of a solvent, and 0.01-0.1 part of a leveling agent. The alkyd resin has the characteristics of high solid content and low viscosity, a paint film can be dried by being baked for 20-25 minutes at low temperature after the amino-alkyd coating is prepared from the alkyd resin, and the energy consumption is greatly reduced. The paint film is high in gloss, good in hardness and good in constructability and decorativeness.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a low-viscosity short-oil alkyd resin with high solid content and an alkyd amino paint prepared therefrom. Background technique [0002] Alkyd resin has mature synthesis technology, wide sources of raw materials, and good coating performance. It is currently the largest resin for coatings. Alkyd resin accounts for more than half of the total amount of synthetic resin used in domestic coatings. Alkyd resins and alkyd resin coatings play an important role in the current coatings industry and are irreplaceable. [0003] Alkyd resins can be classified into long oil, medium oil and short oil. Among them, those with an oil content of less than 50% are called short-oil alkyd resins. This type of alkyd resin is characterized by fast drying, hard paint film, good gloss, and strong adhesion; it has the best compatibility with other resins, so it is often used toget...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/49C08G63/52C09D167/08C09D161/20
Inventor 李华明罗腾吉芹许玉霞陶琼
Owner 西北永新涂料有限公司
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