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A kind of polyester elastomer and its preparation method and toughening agent

A polyester elastomer and prepolymer technology, applied in the field of elastomers, can solve the problems of restricting the application of polyester elastomers and poor toughening performance, and achieve the effects of good toughening performance and good environmental protection.

Active Publication Date: 2017-06-06
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The toughening properties of these block copolymer polyester elastomers containing aromatic segments in the prior art are poor, which limits the application of polyester elastomers in the field of toughening

Method used

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  • A kind of polyester elastomer and its preparation method and toughening agent
  • A kind of polyester elastomer and its preparation method and toughening agent
  • A kind of polyester elastomer and its preparation method and toughening agent

Examples

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preparation example Construction

[0037] The invention provides a kind of preparation method of polyester elastomer, comprising:

[0038] Under the action of catalyst and chain extender, react adipic acid and glycol to obtain polyester elastomer;

[0039] The catalyst includes one or more of acetate, tin compound, titanium compound and antimony compound;

[0040] The chain extender includes hydroxyl compounds or isocyanate compounds.

[0041] The invention reacts adipic acid and glycol under the action of catalyst and chain extender to obtain polyester elastomer. In an embodiment of the present invention, the preparation method of the polyester elastomer is:

[0042] Adipic acid and dihydric alcohol are subjected to an esterification reaction to obtain an intermediate product;

[0043] Under the action of a catalyst, the intermediate product is subjected to a polymerization reaction to obtain a prepolymer;

[0044] Under the action of a chain extender, the prepolymer is chain extended to obtain a polyester...

Embodiment 1

[0064] Under the protection of nitrogen, 1023g of adipic acid and 742g of diethylene glycol were added to the reactor, and the oil bath was heated to 210°C with stirring for 6 hours of esterification reaction. During the esterification reaction, the generated water Continue to distill off to obtain a light-colored intermediate product;

[0065] Add 6.2 g of tetrabutyl titanate to the above-mentioned intermediate product and raise the temperature to 220° C. for 5 hours of polymerization under the condition of 60 Pa to obtain a prepolymer, which is a light yellow transparent viscous liquid;

[0066] Add 27 g of trimethylolpropane to the prepolymer and raise the temperature to 260° C. and stir for 10 hours to carry out chain extension to obtain a slightly yellow and transparent polyester elastomer.

[0067] The polyester elastomer prepared in Example 1 of the present invention is subjected to gel permeation chromatography test, and the test results are as follows: figure 1 as sh...

Embodiment 2

[0070] Under the protection of nitrogen, 1023g of adipic acid and 845g of diethylene glycol were added to the reactor, and the oil bath was heated to 185°C with stirring for 6 hours of esterification reaction. During the esterification reaction, the generated water Continue to distill off to obtain a light-colored intermediate product;

[0071] Add 6.2 g of tetraisopropyl titanate to the above-mentioned intermediate product and raise the temperature to 220° C. for 8 hours of polymerization under the condition of 60 Pa to obtain a prepolymer, which is a light yellow transparent viscous liquid;

[0072] Add 30 g of 4,4'-methylene bis(phenyl isocyanate) (MDI) to the prepolymer and stir at 70°C for 10 hours for chain extension to obtain a yellow transparent polyester elastomer.

[0073] The polyester elastomer prepared in Example 2 of the present invention is subjected to gel permeation chromatography test, and the test results are as follows: image 3 as shown, image 3 For the...

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Abstract

The invention provides a method for preparing a polyester elastomer, comprising: reacting adipic acid and diol under the action of a catalyst and a chain extender to obtain a polyester elastomer; the catalyst includes acetate , one or more of tin compounds, titanium compounds and antimony compounds; the chain extender includes polyhydroxy compounds or isocyanate compounds. The polyester elastomer prepared by the method provided by the invention is an aliphatic polyester elastomer, which does not contain aromatic segments and has a relatively high molecular weight, and has better toughening performance. In addition, the polyester elastomer prepared by the method provided by the present invention is an aliphatic polyester elastomer, which has good environmental protection. The invention also provides a polyester elastomer and a toughening agent.

Description

technical field [0001] The invention relates to the technical field of elastomers, in particular to a polyester elastomer, a preparation method thereof and a toughening agent. Background technique [0002] Polyester elastomer, also known as polyester rubber, has both the excellent elasticity of rubber and the ease of processing of thermoplastics. Polyester elastomers have high mechanical strength, good resilience and wide service temperature, making them widely used in automobile manufacturing, hydraulic hoses, cables and wires, electronic appliances, industrial products, stationery, biological materials and other fields. [0003] In the prior art, the molecular chain of polyester elastomers usually contains aromatic ring structural units. For example, the Chinese patent application number 201310590519.5 discloses a preparation method of high resilience polyester elastomers, including: Acid or its dimethyl ester, aliphatic diol, polyether diol and polyester lactone polyol a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/16C08G63/78
CPCC08G63/16C08G63/78
Inventor 白云刚张贵宝张会良董丽松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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