Thermoplastic block copolyether ester elastomer and preparation method thereof

A technology of block copolymerization and copolyetherester, which is applied in the field of copolyetherester elastomer and its preparation, can solve the problems of high processing temperature, melting point of copolyetherester higher than 220°C, difficult processing, etc., and achieve excellent processing performance and melting point And the effect of crystallization rate reduction and physical property change

Inactive Publication Date: 2010-06-23
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processing temperature of this polyether ester is relatively high, about 260°C, which brings certain difficulties to the processing.
Japanese patent JP2175719 reported polycondensation of phthalic acid and its derivatives with ethylene glycol, 1,4-cyclohex...

Method used

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  • Thermoplastic block copolyether ester elastomer and preparation method thereof
  • Thermoplastic block copolyether ester elastomer and preparation method thereof
  • Thermoplastic block copolyether ester elastomer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] First weigh 970 grams of dimethyl terephthalate (DMT), 720 grams of 1,4-butanediol (BG), 108 grams of polytetramethylene ether glycol (PTMG, molecular weight 1000, 1% total binary Alcohol mole fraction), 144 g 1,4-cyclohexanedimethanol (CHDM, 10% total glycol mole fraction), 50 ppm tetrabutyl titanate, 3065 ppm antioxidant. Add part of dimethyl terephthalate (DMT) powder into the 5L reaction kettle equipped with inlet and outlet, nitrogen inlet, condenser, stirrer and fractionation column, turn on the heating and add the remaining materials into slurry. Gradually rise from room temperature to the range of 180-220°C, keep the temperature at the top of the fractionation column at 63-65°C, and when the amount of by-product methanol distilled out of the reaction kettle reaches more than 90% of the theoretical amount, start to reduce the pressure and heat up, and reduce the temperature in about 40 minutes. The pressure is reduced below 150Pa, while the temperature rises to 2...

Embodiment 2

[0039]First weigh 1000 grams of dimethyl terephthalate (DMT), 695 grams of 1,4-butanediol (BG), 111 grams of polytetramethylene ether glycol (PTMG, molecular weight 1000, 1% total binary Alcohol mole fraction), 370 g 1,4-cyclohexanedimethanol (CHDM, 25% total glycol mole fraction), 15 ppm tetrabutyl titanate, 40 ppm zinc acetate, 300 ppm antioxidant. Add part of dimethyl terephthalate (DMT) powder into the 5L reactor equipped with inlet and outlet, nitrogen inlet, condenser, agitator and fractionation column, turn on the heating, and then add the remaining materials into slurry . Gradually rise from room temperature to the range of 180-220°C, keep the temperature at the top of the fractionation column at 63-65°C, and when the amount of by-product methanol distilled out of the reaction kettle reaches more than 90% of the theoretical amount, start to reduce the pressure and heat up, and reduce the temperature in about 40 minutes. The pressure is reduced below 150Pa, while the t...

Embodiment 3

[0041] First weigh 970 grams of dimethyl terephthalate (DMT), 630 grams of 1,4-butanediol (BG), 108 grams of polytetramethylene ether glycol (PTMG, molecular weight 1000, 1% total binary Alcohol mole fraction), 432 grams of 1,4-cyclohexanedimethanol (CHDM, 30% total glycol mole fraction), 32ppm tetrabutyl titanate, 10ppm zinc lactate, 2625ppm antioxidant. Add dimethyl terephthalate (DMT) powder into a 3L reaction kettle equipped with inlet and outlet, nitrogen inlet, condenser, stirrer and fractionation column, turn on the heating, and then add the slurry made of the remaining materials into . Gradually rise from room temperature to the range of 200-220°C, keep the temperature at the top of the fractionation column at 63-65°C, and when the amount of by-product methanol distilled out of the reactor reaches more than 90% of the theoretical amount, start to reduce the pressure and heat up, and reduce the temperature in about 40 minutes. The pressure is reduced below 130 Pa, whil...

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Abstract

This invention relates to a thermoplastic block copolyether ester elastomer and a preparation method thereof, wherein the aromatic dicarboxylic acid and mixing divalent alcohol are reacted at 180-265 DEG C in the mol ratio of 1: 1.2-2.2; the titanium compound, the mixture of titanium compound and zinc compound or the mixture of titanium compound and magnesium compound is used as catalyst; the copolyether ester contains 15-90ppm of titanium element, 10-200ppm of zinc or magnesium, and 300-4000ppm of antioxidant; the obtained matter is reacted under pressure lower than 150Pa to distil out 1,4-butanediol and 1,4-cyclohexanedimethanol; the final temperature of the reaction is at 260-290 DEG C; in terms of total weight of the copolyether ester, the content of the hard segment is 50-92wt%; the inherent viscosity is 0.65-1.85dl/g; the melting point is at 160-220 degrees centigrade; the elongation at break is 500-1400% and the thermal decomposition temperature is 360 to 450 DEG C.

Description

Technical field: [0001] The invention relates to a thermoplastic block copolyetherester elastomer and a preparation method thereof, in particular to a copolyetherester elastomer containing 1,4-cyclohexanedimethanol (CHDM) as one of its glycol components and its Preparation. Background technique: [0002] As a kind of engineering grade elastomer, linear thermoplastic polyether ester elastomer has excellent physical and mechanical properties, such as toughness, fatigue resistance, high strength, abrasion resistance, oil resistance and chlorine resistance, and its elasticity and strength are between Between plastic and rubber, it is widely used in many fields such as automobile industry, electronic appliances, electrical instruments, industrial products, communications, sporting goods, and shoemaking. [0003] At present, most industrialized polyether ester elastomers use long-chain polyether esters composed of terephthalic acid (PTA) or dimethyl terephthalate (DMT) and polyte...

Claims

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Application Information

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IPC IPC(8): C08G63/672
Inventor 陈颖刘酉琪史君宋智博李连斌王健石艳邹妍付志峰马城华
Owner PETROCHINA CO LTD
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