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A kind of silicon-containing water-based UV bio-based unsaturated polyester and preparation method thereof

A bio-based, unsaturated technology, applied in the field of coatings, can solve the problems of easy aggregation of inorganic nanoparticles, poor weather resistance, uneven performance, etc., achieve the effect of light yellow and clear appearance, improve comprehensive performance, and relieve consumption pressure

Active Publication Date: 2020-11-13
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The preparation method of unsaturated polyester is relatively simple, but there are disadvantages such as low hardness, poor weather resistance, and poor hydrophobicity, which limit its market space
In the prior art, there are relatively few modifications for unsaturated polyesters, mainly focusing on the following points: (1) introduction of long-chain dibasic acids or diols, although this method can improve flexibility, but chain growth makes The density of cross-linking and curing decreases, and the hardness decreases; (2) the good photoelectric effect of inorganic nanoparticles is used for modification. Although this method can improve the hardness and make the prepared paint film have certain photoelectric properties, the inorganic nanoparticles Due to the characteristics of agglomeration, it is difficult to disperse uniformly in the resin. Even if the dispersion is uniform, the storage time is also a problem; (3) Use part of the long-chain silicone resin, fluororesin or fluorosilicone resin to modify by copolymerization, etc. Although this method Elements such as Si and F are introduced, but due to the long chains of silicon and fluorine, it is bound to affect the density of light curing, thereby affecting the adhesion, and the chain lengths of such monomers are different, and the performance is uneven. Molecular chain structure cannot be well controlled

Method used

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  • A kind of silicon-containing water-based UV bio-based unsaturated polyester and preparation method thereof
  • A kind of silicon-containing water-based UV bio-based unsaturated polyester and preparation method thereof
  • A kind of silicon-containing water-based UV bio-based unsaturated polyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Weigh 8.56g of 1,4-butanediol and 0.67g of 2,2-dimethylol propionic acid, add them into a four-necked flask equipped with a circulating condensing device, raise the temperature to 60°C, and stir evenly until 2,2 The dimethylolpropionic acid was dissolved, and the solution in the flask was clarified;

[0042](2) Heat up to 90°C, weigh KH560 with the same molar mass as 2,2 dimethylolpropionic acid in a beaker, with a mass of 1.18g, and simultaneously weigh 0.02g of N,N dimethylolamine and p-hydroxyl Anisole 0.02g, stirred and mixed with KH560 evenly, then KH560 mixed with catalyst and polymerization inhibitor was slowly added dropwise into the four-necked flask in four batches on average, each batch was added dropwise within 8 minutes, and the interval between 10 minutes and Add the next batch, and after all the drops are completed, keep the temperature for 1.5h until the acid value drops to 30mg(KOH) / g;

[0043] (3) Raise the temperature to 135°C, blow nitrogen, wei...

Embodiment 2

[0049] (1) Weigh 8.11g of 1,4-butanediol and 1.34g of 2,2-dimethylol propionic acid into a four-necked flask equipped with a circulating condensing device, heat up to 60°C, and stir evenly until 2,2 The hydroxymethylpropionic acid was dissolved, and the flask solution was clarified;

[0050] (2) Heat up to 90°C, weigh KH560 with the same molar mass as 2,2 dimethylolpropionic acid in a beaker, with a mass of 2.36g, and simultaneously weigh 0.03g of N,N dimethylol amine and p-hydroxyl Anisole 0.03g, stir and mix with KH560 evenly, then slowly add KH560 mixed with catalyst and polymerization inhibitor into the four-necked flask dropwise in four batches, each batch is added within 8 minutes, and the next batch is added at an interval of 12 minutes. One batch, after all the drops are completed, keep the temperature for 1.5h until the acid value drops to 30mg(KOH) / g;

[0051] (3) Raise the temperature to 135°C, blow nitrogen, weigh 16.39g of itaconic acid, 0.24g of p-toluenesulfoni...

Embodiment 3

[0056] (1) Weigh 7.21g of 1,4-butanediol and 2.68g of 2,2-dimethylol propionic acid, add them into a four-neck flask equipped with a circulating condensing device, raise the temperature to 60°C, and stir evenly until 2,2 The dimethylolpropionic acid was dissolved, and the solution in the flask was clarified;

[0057] (2) Heat up to 90°C, weigh KH560 with the same molar mass as 2,2 dimethylolpropionic acid in a beaker, with a mass of 4.72g, and simultaneously weigh 0.07g of N,N dimethylol amine and p-hydroxyl Anisole 0.07g, stir and mix with KH560 evenly, then slowly add KH560 mixed with catalyst and polymerization inhibitor into the four-necked flask dropwise in four batches, each batch is added within 8 minutes, and then added at intervals of 15 minutes One batch, after all the drops are completed, keep the temperature for 1.5h until the acid value drops to 30mg(KOH) / g;

[0058] (3) Raise the temperature to 135°C, pass nitrogen gas, weigh 17.17g of itaconic acid, 0.27g of p-...

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Abstract

The invention belongs to the field of coatings, and discloses a silicon-containing waterborne UV bio-based unsaturated polyester and a preparation method thereof. The method comprises the following steps: mixing bio-based glycol and carboxyl-containing glycol to form clear liquid; adding a silane coupling agent, a catalyst and a polymerization inhibitor to the clear liquid to carry out a modification reaction; after the modification reaction, adding bio-based diacid, a catalyst and a polymerization inhibitor into the mixture to carry out a photocuring reaction; cooling a product after the photocuring reaction to a room temperature, adding a neutralizing agent for neutralization; and then mixing with a photoinitiator to obtain the silicon-containing waterborne UV bio-based unsaturated polyester. According to the method provided by the invention, through modification, a Si-O bond is introduced, so that the weather resistance, thermal degradation temperature and hardness are improved; andan obtained product has no obvious change in 3 months and has good stability, so that the comprehensive performance of the waterborn UV unsaturated polyester is improved.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a silicon-containing water-based UV bio-based unsaturated polyester and a preparation method thereof. Background technique [0002] Water-based UV coatings take into account the advantages of both water-based and UV-curable coatings, and have excellent construction operability and environmental protection performance. They are a new type of green material that has been studied more. [0003] At present, most of the monomers used to synthesize waterborne coating oligomers come from a type of fossil energy—petroleum. However, such petroleum-based polymer materials have a long degradation cycle in the natural environment and some are even difficult to degrade. Over time, they will cause pollution to soil, water, etc.; on the other hand, fossil energy such as petroleum is non-renewable. Since the industrial revolution, the global The utilization rate of fossil energy such as petroleum is inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/695C08G63/78C09D167/06
Inventor 韦星船岳梦恩谭晓欣卢景威
Owner GUANGZHOU UNIVERSITY
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