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Recoat-able polishing-free unsaturated polyester resin for piano lacquer and preparation method of unsaturated polyester resin

A polyester resin, piano paint technology, applied in the direction of coating, can solve the problems of difficult to meet the high hardness requirements of piano topcoat, low surface hardness of piano paint, grinding and polishing, etc., to achieve accelerated dual curing effect and solve surface hardness Low, good adhesion effect

Inactive Publication Date: 2015-12-30
QINGDAO ZHANCHEN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above problems in the prior art of piano lacquer, the problem to be solved in the present invention is: the conventional unsaturated polyester resin is waxed to prevent oxygen, but the transparency is poor, it needs to be polished, and it cannot be recoated; The surface hardness of the piano paint configured with polyester resin is low, and it is difficult to meet the high hardness requirements of the piano paint

Method used

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  • Recoat-able polishing-free unsaturated polyester resin for piano lacquer and preparation method of unsaturated polyester resin
  • Recoat-able polishing-free unsaturated polyester resin for piano lacquer and preparation method of unsaturated polyester resin
  • Recoat-able polishing-free unsaturated polyester resin for piano lacquer and preparation method of unsaturated polyester resin

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Add 327g maleic anhydride, 49g phthalic anhydride, 200g diethylene glycol, 34g neopentyl glycol, 0.5g Hypophosphorous acid, 0.2g hydroquinone, then start stirring and heating, heat up to 180-200°C, keep warm; continuously check the acid value, when the acid value drops to 120-130mgKOH / g, cool down to 120°C and add pentaerythritol triene Propyl ether 200g, heat up to 200±5°C evenly in 3 hours, keep warm until the viscosity and acid value pass, then cool down to below 120°C, add 300g of styrene to dilute, filter and discharge;

Embodiment 2

[0021] Add 300g maleic anhydride, 100g phthalic anhydride, 250g diethylene glycol, 0.7g hypophosphorous acid, 0.3g para Hydroquinone, then start stirring and heating, heat up to 180-200°C, keep warm; continuously check the acid value, when the acid value drops to 120-130mgKOH / g, cool down to 120°C and add trimethylolpropane diallyl Ether 250g, uniformly heated to 200±5°C in 3 hours, then kept warm until the viscosity and acid value passed, then cooled to below 120°C, added 300g of styrene to dilute, filtered and discharged;

Embodiment 3

[0023] Add 350g of maleic anhydride, 15g of phthalic anhydride, 180g of diethylene glycol, 54g of neopentyl glycol, and 0.6g of hypophosphorous acid in a 2000mL four-necked flask equipped with a stirring device, a thermometer and nitrogen protection in sequence , 0.3g hydroquinone, then start stirring and heating, heat up to 180-200°C, keep warm; continuously check the acid value, when the acid value drops to 120-130mgKOH / g, cool down to 120°C and add trimethylolpropane Diallyl ether 150g, pentaerythritol triallyl ether 150g, take 3 hours to evenly heat up to 200±5°C, keep warm until the viscosity and acid value are qualified, then cool down to below 120°C, add 300g of styrene to dilute, filter and discharge ;

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Abstract

The invention discloses recoat-able polishing-free unsaturated polyester resin for piano lacquer and a preparation method of the unsaturated polyester resin. The unsaturated polyester resin comprises the following components in percentage by weight: 15 to 25 percent of an air-dry monomer, 25 to 35 percent of polyatomic acid, 20 to 30 percent of polyhydric alcohols, 20 to 30 percent of a solvent, 0.05 to 0.1 percent of an antioxidant and 0.01 to 0.05 percent of a polymerization inhibitor. The preparation method comprises the following steps: adding the polyatomic acid, the polyhydric alcohols, the solvent and the polymerization inhibitor into a reaction kettle in sequence, switching on stirring and heating at the same time, heating to 180 to 200 DEG C, and preserving the heat; continuously detecting an acidity value, cooling to 120 DEG C when the acidity value is reduced to 120 to 130mgKOH / g, then cooling to 120 DEG C and adding the air-dry monomer, uniformly heating to 200+ / -5 DEG C by 3 hours, preserving the heat until the viscosity and the acidity value are qualified, then cooling and diluting the materials, performing filtration, and discharging a product. The piano lacquer prepared from the unsaturated polyester resin serving as a base material is high in surface hardness, and is higher in glossiness and transparency without polishing, construction period is short, the unsaturated polyester resin is recoat-able, convenient to prepare, and can be generally used in the bottom surface, and the production efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of coatings, and specifically relates to an unsaturated polyester resin for recoatable polishing-free piano paint and a preparation method thereof. Background technique [0002] The coating film of the piano lacquer shell is often subject to external friction and collision, and is easy to scratch, so it needs higher hardness to resist. However, when the hardness is high, the brittleness of the paint film increases, and it is prone to cracking when it is bumped or the temperature changes. In order to solve this problem, the matching coating system of waxy unsaturated polyester topcoat and air-drying unsaturated polyester primer is often used in piano painting. This is because the wax-type topcoat uses conventional unsaturated polyester with high double bond content, high film hardness and brittle paint film; the air-drying unsaturated polyester primer uses air-drying unsaturated polyester with double bond co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08F212/08C08G63/676C08G63/78C09D151/08
Inventor 谭梅荣朱强刘志刚钟荆祥
Owner QINGDAO ZHANCHEN NEW MATERIAL
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