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A kind of low volatility, low precipitation polyester material and preparation method thereof

A polyester material and low-volatility technology, applied in the field of low-volatility, low-precipitation polyester materials and their preparation, can solve problems such as easy generation of air marks, no invention report, and low volatility

Active Publication Date: 2021-08-20
NANTONG XINGCHEN SYNTHETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it still has shortcomings in some aspects, such as the glossiness of PBT injection molded parts is not bright enough, and it is easy to produce air marks, especially when preparing high-gloss products, the rejection rate is high
[0007] To sum up, how to reduce the low molecular weight substances in polyester materials, reduce their volatility, reduce their precipitation, reduce TVOC, reduce the odor of materials, and at the same time not reduce the performance of materials, improve the quality requirements of materials, and meet the requirements of The application requirements of customers in the downstream industry chain and the expansion of its application fields have high practical significance and scientific research value, but the current solutions cannot meet the current requirements, and there are no public invention reports

Method used

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  • A kind of low volatility, low precipitation polyester material and preparation method thereof

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Experimental program
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Effect test

preparation example 1

[0056] 1) Slurry preparation: Put terephthalic acid (PTA) and 1,4-butanediol (BDO) into the slurry preparation tank U1 respectively through the metering system, stir evenly, and record it as slurry S1, in which PTA is 773g, BDO It is 520g.

[0057] 2) Catalyst preparation: add 1,4-butanediol (BDO) 100g and catalyst CAT (tetrabutyl titanate) 158.9g into the preparation tank U2, heat and boil under vacuum for 2-3 hours, and the vacuum degree is 20- 30KPa, the temperature is 180 o C. After cooling down, transfer the configured catalyst into the catalyst feeding tank.

[0058] 3) Esterification reaction: The slurry S1 in the slurry tank U1 is pumped into the esterification kettle from the sauce, and the prepared catalyst CAT is pumped into the esterification kettle through gears, and esterification occurs under the action of the catalyst Oligomerization reaction, esterification reaction until no more water is produced, resulting in oligomers. The amount of catalyst added accoun...

preparation example 2

[0062]According to the same conditions and steps as in Preparation Example 1, the difference is that in step 1) slurry preparation, 20 g of α, ω-dihydroxyethyl polydimethylsiloxane is also added as a functional monomer to obtain polyester The sample, with a molecular weight of 24000 and an intrinsic viscosity of 0.83 dL / g, is referred to as sample 2.

preparation example 3

[0064] According to the same conditions and steps as in Preparation Example 1, the difference is that in step 1) slurry preparation, the dibasic acid is 1,6-cyclohexanedioic acid to obtain a polyester sample with a molecular weight of 28000 and an intrinsic viscosity of 0.98 dL / g, referred to as sample 3.

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Abstract

The invention provides a low-volatility, low-precipitation polyester material and a preparation method thereof. The polyester material is heated to a temperature above the melting point of the polyester resin to form a polyester melt, which enters a discharge and pelletizing device. The inert gas is introduced into the feeding port of the discharge and pelletizing equipment and stirred to form a foam body, and then the foam body undergoes natural exhaust and vacuum exhaust, and the polyester material is obtained after cooling and pelletizing. The obtained polyester material has a low content of low molecular volatiles, a low content of precipitates in organic solvents, low odor at high temperatures, low color B index, no yellowing, and broadened It widens the application range of polyester materials, and is especially suitable for use in fields with strict environmental protection and health requirements such as automobiles, home appliances, and electronics.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polyester material with low volatility and low precipitation and a preparation method thereof. Background technique [0002] With the development of society and the advancement of science and technology, the demand for materials is expanding day by day, and the production and application of polymer synthetic materials have also developed rapidly. Among them, the application of engineering plastics in various fields is expanding year by year. Polyester material, as one of the five major engineering plastics, mainly refers to PBT, the Chinese name polybutylene terephthalate, which is a semi-crystalline thermoplastic resin, because of its high modulus, high strength, high elasticity and heat resistance, etc. Advantages, mainly used in electronic appliances, automobiles, lighting, machinery, spinning, communication, thin film and instrumentation and other fie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B9/06B29C48/76C08J9/12C08L67/02
CPCB29B9/06B29C48/763B29C48/766C08J9/122C08J2203/06C08J2367/02
Inventor 崔晓文姚君张丽
Owner NANTONG XINGCHEN SYNTHETIC MATERIAL