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Low-temperature-resistant polyester elastomer with mixed soft segment and preparation method thereof

A polyester elastomer, low temperature resistance technology, applied in the field of polyester elastomer and its preparation, can solve the problem of not finding polydimethylsiloxane and polyether

Active Publication Date: 2013-06-12
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, there has been no report of using polydimethylsiloxane and polyether as a mixed soft segment

Method used

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  • Low-temperature-resistant polyester elastomer with mixed soft segment and preparation method thereof
  • Low-temperature-resistant polyester elastomer with mixed soft segment and preparation method thereof
  • Low-temperature-resistant polyester elastomer with mixed soft segment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 150 parts by weight of dimethyl terephthalate, 200 parts by weight of ethylene glycol, 150 parts by weight of polyethylene glycol (molecular weight 2000g / mol), 180 parts by weight of polydimethylsiloxane of the following formula and catalyst magnesium acetate , tetrabutyl titanate (0.1 parts by weight each) was added into the polymerization tank. (Note: this polymerization kettle is equipped with stirring device, nitrogen input device and fractionation device). The temperature was raised to 200°C, and the reaction was carried out for 3 hours until no methanol distilled out. Add 0.5 parts by weight of antioxidant (1010), 0.5 parts by weight of anti-aging agent (UV-234), and 0.5 parts by weight of phosphite into the system. Slowly raise the temperature to 230° C. and lower the pressure to 0.01 MPa, and react for 1 hour. Subsequently, the temperature of the system was raised to 270° C., the pressure was lowered to 20 Pa, and the reaction was continued for 3 hours. Introd...

Embodiment 2

[0027] 150 parts by weight of dimethyl phthalate, 40 parts by weight of propylene glycol, 10 parts by weight of polypropylene glycol (molecular weight 6000g / mol), 80 parts by weight of polydimethylsiloxane of the following formula and catalyst manganese acetate, tetratitanate Butyl esters (0.5 parts by weight each) were charged into the polymerization kettle. (Note: this polymerization kettle is equipped with stirring device, nitrogen input device and fractionation device). The temperature was raised to 160 degrees, and the reaction was carried out for 1 hour until no methanol distilled out. Add 0.5 parts by weight of antioxidant (1010), 0.5 parts by weight of anti-aging agent (UV-234), and 0.5 parts by weight of phosphite into the system. Slowly raise the temperature to 200° C. and lower the pressure to 0.05 MPa, and react for 1 hour. Subsequently, the temperature of the system was raised to 230° C., the pressure was lowered to 70 Pa, and the reaction was continued for 6 hou...

Embodiment 3

[0031] 150 parts by weight of dimethyl 2,6-naphthalene dicarboxylate, 100 parts by weight of butanediol, 100 parts by weight of polytetrahydrofuran ether glycol (molecular weight 2000g / mol), 40 parts by weight of polydimethylsiloxane with the following structural formula and catalyst zinc acetate, tetrabutyl titanate (0.75 parts by weight each) were added into the polymerization kettle. (Note: this polymerization kettle is equipped with stirring device, nitrogen input device and fractionation device). The temperature was raised to 180 degrees, and the reaction was carried out for 2 hours until no methanol distilled out. Add 0.5 parts by weight of antioxidant (1010) and 0.5 parts by weight of anti-aging agent (UV-234) into the system, slowly raise the temperature to 220° C., lower the pressure to 0.03 MPa, and react for 1 hour. Subsequently, the temperature of the system was raised to 260° C., the pressure was lowered to 30 Pa, and the reaction was continued for 5 hours. Intr...

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Abstract

The invention relates to a low-temperature-resistant polyester elastomer with a mixed soft segment and a preparation method thereof. The elastomer mainly comprises aromatic dimethyl diformate (or aromatic diformate), alpha, omega-aliphatic diol, polyether glycol and polydimethylsiloxane which is shown as a structural formula M and is end-capped by hydroxyl or a derivative of the polydimethylsiloxane, wherein A and B shown as the structural formula refer to methylene chains with 1-12 carbon atoms; C and D are polyethylene glycol, polypropylene glycol and polytetramethylene ether glycol with the molecular weights between 200 g / mol and 4,000 g / mol or the compositions of polyethylene glycol, polypropylene glycol and polytetramethylene ether glycol. Compared with the prior art, the method has the advantages that: the mixed soft segment is used, and the mixed soft segment is polydimethylsiloxane with a more flexible molecular chain, so that the elastomer has higher elasticity and higher lowtemperature resistance.

Description

technical field [0001] The invention relates to a polyester elastomer with mixed soft segment low temperature resistance and a preparation method thereof, in particular to a bacteriostatic, biodegradable and conductive nanocomposite material suitable for biosensing, food preservation and packaging materials membrane. Background technique [0002] Polyester thermoplastic elastomer (TPEE), also known as polyester rubber, is a linear block copolymer composed of crystalline, short-chain polyester hard segments and amorphous, long-chain polyether soft segments. The hard segment (melting point 190-220°C) is dispersed in the continuous phase of the soft segment. In this structure, the crystalline phase acts as a physical crosslink, softens and flows when heated, endows the polymer with strength and plasticity, and the glass transition temperature of the soft segment is relatively high. Low temperature (about -50°C) endows the polymer with elasticity, and the hardness, modulus, mel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/695
Inventor 姚晨光杨桂生
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD