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 ca

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

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example one:

[0039] The present 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, and the raw materials are as follows by mass percentage:

[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 method for preparing the ultra-low chroma PEHA, which includes the following steps:

[0048] (1) Add all adipic acid, ethylene glycol and high-temperature antioxidants into the reactor at the same time, stir and raise the temperature to form a mixture. At this time, it is necessary to check whether the cooling water is turned off, and at the same time turn on the motor, separator and total condenser pipe...

Example Embodiment

[0056] Embodiment two:

[0057] A preparation method of the ultra-low chroma PEHA includes 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, stir and heat up to produce a mixture. At this time, it is necessary to check whether the cooling water is turned off, and at the same time turn on the motor, partial condenser and total condenser tube Road cooling water.

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

[0060] (3) After stirring for 1 hour, start to increase the temperature. After the water production starts in the mixture, the temperature of the partial condenser is kept at 100°C, the cooling water of the total condenser is half-open, and the receiver water weighs 200 kg.

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

Example Embodiment

[0065] Embodiment three:

[0066] A preparation method of the ultra-low chroma PEHA includes 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 heat up to form a mixture. At this time, it is necessary to check whether the cooling water is turned off, and at the same time turn on the motor, decondenser 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 increase the temperature. After the mixture starts to produce water, the temperature of the partial condenser is maintained at 105°C, the cooling water of the total condenser is half-open, and the receiver water weighs 220 kg.

[0070] (4) When the temperature rises to 220℃, measure the AV after 1 hour at this temperature, when the AV When <30, add 9kg of catalyst and 45...

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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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