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Ultralow-chroma PEHA for TPU and preparation method thereof

A chromaticity, ultra-low technology, applied in the field of PEHA, can solve problems such as yellowing, synthetic TPU and PEHA's insufficient temperature resistance, and achieve the effects of preventing oxidative yellowing, shortening production time, and improving quality

Active Publication Date: 2016-01-27
JIAXING ROCK CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 4. The influence of other factors: The selection of catalyst has a non-negligible effect on the production of polyester. At the same time, PEHA is usually produced by polycondensation, and the production process is generally carried out at a high temperature above 240 ° C. At this temperature Under the circumstances, when used in the synthesis of TPU and PEHA, it will turn yellow because of its insufficient temperature resistance, which will affect the use.

Method used

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  • Ultralow-chroma PEHA for TPU and preparation method thereof
  • Ultralow-chroma PEHA for TPU and preparation method thereof

Examples

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Effect test

Embodiment 1

[0039] The invention provides an ultra-low chroma PEHA for TPU. The raw materials of the PEHA include adipic acid, 1,6-hexanediol, ethylene glycol, a high-temperature antioxidant and a catalyst. The raw materials are:

[0040] Adipic acid 50~70%;

[0041] 1,6-hexanediol 10~25%;

[0042] Ethylene glycol 25~45%;

[0043] High temperature antioxidant 0.3~0.5%;

[0044] Catalyst 0.01~0.1%;

[0045] The high temperature antioxidant is phosphite;

[0046] The catalyst is stannous octoate.

[0047] The present invention also provides a preparation method of the ultra-low chroma PEHA, comprising the following steps:

[0048] (1) Add all adipic acid, ethylene glycol and high-temperature antioxidants into the reactor at the same time and stir to raise the temperature to form a mixture. At this time, it is necessary to check whether the cooling water is closed, and at the same time open the pipeline of the motor, partial condenser and total condenser of cooling water.

[0049] (2)...

Embodiment 2

[0057] A preparation method of the ultra-low chroma PEHA, comprising the following steps:

[0058] (1) Add 2800kg of adipic acid, 2000kg of ethylene glycol and 30kg of high-temperature antioxidant into the reactor at the same time and stir to raise the temperature to form a mixture. At this time, it is necessary to check whether the cooling water is closed, and at the same time open the motor, partial condenser and total condenser tube road cooling water.

[0059] (2) Turn off the heat medium when the temperature in the tank rises to 90°C, and stir for 1 hour.

[0060] (3) After stirring for 1 hour, start to heat up. When the mixture starts to produce water, the temperature of the partial condenser is kept at 100°C, and the cooling water of the total condenser is half-opened. At the same time, the water weight of the receiver is weighed to 200kg.

[0061] (4) When the temperature rises to 220°C, measure AV after 1 hour at this temperature. When AV<30, add 8kg of catalyst and ...

Embodiment 3

[0066] A preparation method of the ultra-low chroma PEHA, comprising the following steps:

[0067] (1) Add 2500kg of adipic acid, 2000kg of ethylene glycol and 25kg of high-temperature antioxidant into the reactor at the same time and stir to raise the temperature to form a mixture. At this time, it is necessary to check whether the cooling water is closed, and at the same time open the motor, partial condenser and total condenser tube road cooling water.

[0068] (2) When the temperature in the tank rises to 95°C, turn off the heat medium and stir for 1 hour.

[0069] (3) After stirring for 1 hour, start to heat up. When the mixture starts to produce water, the temperature of the partial condenser is kept at 105°C, the cooling water of the total condenser is half-opened, and the water weight of the receiver is weighed at the same time to 220kg.

[0070] (4) When the temperature rises to 220°C, measure AV after 1 hour at this temperature. When AV<30, add 9kg of catalyst and 4...

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Abstract

The invention discloses ultralow-chroma PEHA for TPU and a preparation method thereof. PEHA is prepared from 50-70% of adipic acid, 10-25% of 1,6-hexanediol, 25-45% of ethylene glycol, 0.3-0.5% of high-temperature antioxidant and 0.01-0.1% of catalyst. Both the raw material formula and the preparation method are improved, the feed quantity and feed time period of the raw materials are regulated, meanwhile, the high-temperature antioxidant-phosphite ester is added to improve the temperature tolerance of original raw materials, and therefore the chroma of produced PEHA resin is obviously increased compared with that of resin commonly used in the market.

Description

technical field [0001] The invention relates to PEHA, in particular to an ultra-low chroma PEHA for TPU and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastic rubber (TPU) is widely used in daily necessities, sporting goods, toys, decorative materials and other fields. It is mainly divided into polyester type and polyether type. It has a wide range of hardness, wear resistance, oil resistance, transparency, and good elasticity. and other advantages, and gradually replaced other substances to meet the environmental protection requirements of more and more fields. Polyurethane was first researched by Beyer in 1930, and it was first industrially produced in West Germany and the United States after 1937. Polyurethane has developed rapidly in recent years because of its superior properties such as high strength, wear resistance, oil resistance, low temperature resistance, chemical resistance and ozone resistance. In my country, since t...

Claims

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Application Information

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IPC IPC(8): C08G63/16C08G18/42C08K5/524
Inventor 张国荣
Owner JIAXING ROCK CHEM IND
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