Preparation method of thermoplastic polyester elastomer

A technology of thermoplastic polyester and elastomer, which is applied in the field of preparation of thermoplastic polyester elastomer, can solve the problems that cannot meet the light stability of high-performance TPEE products, and achieve the effect of improving light stability

Inactive Publication Date: 2014-12-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TPEE elastomers are easily degraded, and antioxidants and UV absorbers are added during polymerization. Most of the UV absorbers added at present are single benzo

Method used

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  • Preparation method of thermoplastic polyester elastomer

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Experimental program
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Embodiment 1

[0017] Embodiment 1: In 20 liters of polymerization reactors, add 3.4 kilograms of terephthalic acid (PTA), 3.2 kilograms of 1,4-butanediol (BDO), the mole of 1,4-butanediol and terephthalic acid Ratio is 1.7, antioxidant (BHT) 25 grams, addition accounts for 0.5% of the theoretical quality of the polyester elastomer that makes, benzophenone class ultraviolet absorber (UV-531), benzotriazole class ultraviolet absorber UV-326) and 2.5 grams each of hindered amine light stabilizer (770), the amount added accounts for 0.05% of the theoretical mass of the obtained polyester elastomer, 3.4 grams of tetrabutyl titanate, set the esterification kettle to heat The temperature is 220°C, the esterification pressure is 100Kpa (absolute pressure), and the esterification reaction is carried out. When the esterification is 180 minutes to 200 minutes and the water output reaches more than 1700ml, add 0.5 kg of polytetrahydrofuran (number average molecular weight: 2000), and the addition amount...

Embodiment 2

[0018] Embodiment 2: In 20 liters of polymerization reactors, add 3.4 kilograms of terephthalic acid (PTA), 3.4 kilograms of 1,4-butanediol (BDO), the mole of 1,4-butanediol and terephthalic acid Ratio is 1.9, antioxidant (BHT) 43 grams, addition accounts for 0.8% of the theoretical quality of the polyester elastomer that makes, benzophenone class ultraviolet absorber (UV-531), benzotriazole class ultraviolet absorber UV-326) and hindered amine light stabilizer (770) each 4.3 grams, the amount of addition accounts for 0.08% of the theoretical mass of the obtained polyester elastomer, 3.4 grams of tetrabutyl titanate, set the esterification kettle to heat The temperature is 220°C, the esterification pressure is 100Kpa (absolute pressure), and the esterification reaction is carried out. When the esterification is 200 minutes to 220 minutes, and the water output reaches 1800ml or more, add 0.8 kg of polytetrahydrofuran (number average molecular weight 1000), and the amount added i...

Embodiment 3

[0019] Embodiment 3: In 20 liters of polymerization reactors, add 3.4 kilograms of terephthalic acid (PTA), 4.1 kilograms of 1,4-butanediol (BDO), the mole of 1,4-butanediol and terephthalic acid Ratio is 2.2, antioxidant (BHT) 63 grams, addition accounts for 1% of the theoretical quality of the polyester elastomer that makes, benzophenone class ultraviolet absorber (UV-531), benzotriazole class ultraviolet absorber UV-326) and 3.2 grams of hindered amine light stabilizer (770), the amount added accounts for 0.1% of the theoretical mass of the obtained polyester elastomer, 3.4 grams of tetrabutyl titanate, set the esterification kettle to heat The temperature is 220°C, the esterification pressure is 100Kpa (absolute pressure), and the esterification reaction is carried out. When the esterification is 220 minutes to 240 minutes, and the water output reaches more than 2000ml, add 1.93kg of polytetrahydrofuran (number average molecular weight 1000), and the addition amount is abou...

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Abstract

The invention discloses a preparation method of a thermoplastic polyester elastomer. The preparation method comprises the following steps: adding an antioxidant, a diphenyl ketone ultraviolet absorbent, a benzotriazole ultraviolet absorbent and a hindered amine light stabilizer to terephthalic acid, 1,4-butanediol and polytetrahydrofuran which are taken as raw materials, and conducting esterification and condensation reactions. By adding the diphenyl ketone ultraviolet absorbent, the benzotriazole ultraviolet absorbent and the hindered amine light stabilizer in a polymerizing process, ultraviolet light is absorbed and radicals in a high polymer are caught, so that light stability of the polyester elastomer is greatly improved, and outdoor illumination time, especially at temperature above maximum outdoor temperature, i.e., 30 DEG C, in summer, doubles time of a normal polyester elastomer; the prepared thermoplastic polyester elastomer disclosed by the invention is applicable to such fields as automobile parts, hydraulic hoses, cables and wires, electronics and electrical appliances, industrial products, stationery and sporting goods, and biological materials.

Description

technical field [0001] The invention relates to a preparation method of polyester, in particular to a preparation method of thermoplastic polyester elastomer. Background technique [0002] The research on thermoplastic polyester elastomer (TPEE) began in the late 1940s. It uses a crystalline high-melting point polyester block as a hard segment, and an amorphous polyether block with a lower glass transition temperature as a soft segment. , so it has both the elasticity of rubber and the strength of engineering plastics. Most industrialized polyester elastomers use polytetrahydrofuran (PTMEG) as the soft segment and polybutylene terephthalate (PBT) as the hard segment. [0003] In 1971, DuPont of the United States took the lead in developing TPEE elastomer products with the trade name Hytrel. At present, there are more than ten foreign manufacturers producing TPEE elastomers. In 2007, the market size of TPEE elastomers in the world was about 87,000 tons. The consumption mark...

Claims

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Application Information

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IPC IPC(8): C08G63/672C08G63/78C08K5/13C08K5/07C08K5/3475
Inventor 张建徐榕蔚李晶李红芳秦振宝
Owner CHINA PETROLEUM & CHEM CORP
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