A fast-drying alkyd resin used for wood lacquers, and a preparation method thereof

A technology of alkyd resin and wood lacquer, applied in the field of coating resin, can solve the problems of poor matting, low hardness, poor dryness of alkyd resin, etc.

Inactive Publication Date: 2013-08-07
SKSHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because ordinary alkyd resins use a large number of pentaerythritol and ethylene glycol or diethylene glycol, with little or no branched alcohols, and pentaerythritol, ethylene glycol or diethylene glycol have poor compatibility with xylene, if the final resin is to be Good compatibility with xylene, the formula must contain more vegetable oleic acid, but the higher the content of vegetable oleic acid in the formula, the smaller the molecular weight of the final alkyd resin will be, which will cause the alkyd resin used in polyurethane coatings to dry. Poor performance, low hardness, poor extinction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The fast-drying alkyd resin for wood varnish comprises the following components by weight:

[0032] Vegetable oleic acid 17.01 parts

[0033] Ethylene glycol 5.1 parts

[0034] Pentaerythritol 12 parts

[0035] 22 parts of phthalic anhydride

[0036] Maleic anhydride 0.8 parts

[0037] 4 parts benzoic acid

[0038] Chain extender 5 parts

[0039] Antioxidant color reducer 0.09 parts

[0040] Diluted solvent 34 parts.

[0041] The preparation method of fast-drying alkyd resin for described woodware paint:

[0042] A. Add vegetable oleic acid and ethylene glycol successively in the reactor, mix and stir evenly;

[0043] B. Add pentaerythritol, phthalic anhydride, maleic anhydride, benzoic acid, chain extender, anti-oxidant color reducing agent and water-carrying agent in turn, pass protective gas, heat up to 90°C and start stirring, and heat up to 165°C It needs to react at -170°C for 1 hour, then raise the temperature to 210°C at a rate of 10-15°C / hour for ester...

Embodiment 2

[0046] The fast-drying alkyd resin for wood varnish comprises the following components by weight:

[0047] Vegetable oleic acid 21 parts

[0048] Ethylene glycol 6.85 parts

[0049] Pentaerythritol 17 parts

[0050] 21 parts of phthalic anhydride

[0051] Maleic anhydride 1.1 parts

[0052] 3 parts benzoic acid

[0053] Chain extender 3 parts

[0054] Antioxidant color reducer 0.05 parts

[0055] Diluted solvent 27 parts.

[0056] The preparation method of fast-drying alkyd resin for described woodware paint:

[0057] A. Add vegetable oleic acid and ethylene glycol successively in the reactor, mix and stir evenly;

[0058] B. Add pentaerythritol, phthalic anhydride, maleic anhydride, benzoic acid, chain extender, anti-oxidant color reducing agent and water-carrying agent in turn, pass protective gas, heat up to 90°C and start stirring, and heat up to 165°C It needs to react at -170°C for 1 hour, then raise the temperature to 210°C at a rate of 10-15°C / hour for esterif...

Embodiment 3

[0061] The fast-drying alkyd resin for wood varnish comprises the following components by weight:

[0062] Vegetable oleic acid 19 parts

[0063] Ethylene glycol 6.31 parts

[0064] Pentaerythritol 9 parts

[0065] 28 parts of phthalic anhydride

[0066]Maleic anhydride 0.6 parts

[0067] 7 parts of benzoic acid

[0068] Chain extender 7 parts

[0069] Antioxidant color reducer 0.09 parts

[0070] Diluted solvent 23 parts.

[0071] The preparation method of fast-drying alkyd resin for described woodware paint:

[0072] A. Add vegetable oleic acid and ethylene glycol successively in the reactor, mix and stir evenly;

[0073] B. Add pentaerythritol, phthalic anhydride, maleic anhydride, benzoic acid, chain extender, anti-oxidant color reducing agent and water-carrying agent in turn, pass protective gas, heat up to 90°C and start stirring, and heat up to 165°C It needs to react at -170°C for 1 hour, then raise the temperature to 210°C at a rate of 10-15°C / hour for esteri...

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PUM

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Abstract

The invention belongs to the technical field of coating resin, and in particular relates to a fast-drying alkyd resin used for wood lacquers, and a preparation method thereof. The fast-drying alkyd resin used for wood lacquers comprises the following components, by weight: 17-21 parts of vegetable oil acid, l 4-9 parts of ethylene glycol, 9-18 parts of pentaerythritol, 21-30 parts of phthalic anhydride, 0.6-1.3 parts of maleic anhydride, 2-7 parts of benzoic acid, 3-9 parts of a chain extender, 0.04-0.09 parts of an antioxidative color-reducing agent, and 23-39 parts of a letdown solvent. According to the invention, the alkyd resin has a large molecular weight, relatively few free hydroxyl groups, and an overall uniform molecular weight distribution, so the fast-drying alkyd resin used for wood lacquers of the present invention has characteristics of fast drying, good transparency, good polishing property, and a high performance cost ratio.

Description

technical field [0001] The invention discloses the technical field of coating resins, in particular to a quick-drying alkyd resin for wood varnishes and a preparation method thereof. Background technique [0002] Alkyd resin is a kind of coating that is very important for synthetic resin due to its easy availability of raw materials, diversified products, commensurate performance and price, and convenient construction. More than 40 parts of resin; in my country, alkyd resin is still the main coating used for synthetic resin, and its output has leapt to the top of all kinds of coatings since 1983, and it still maintains its leading position so far. [0003] It is an important application for alkyd resin to use its hydroxyl-OH and isocyanate-NCO to form polyurethane resin, and it is widely used in coatings, especially the structure of alkyd resin has a great influence on the performance of polyurethane coatings after compatibility The manufacturing method of alkyd resin can be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/52C08G63/78C09D167/08
Inventor 洪杰王小强
Owner SKSHU PAINT
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