Hydrolysis resistant high temperature resistant thermoplastic polyester elastomer composition

Abstract

The invention provides a hydrolysis resistant high temperature resistant thermoplastic polyester elastomer composition including 100 parts by weight of polyester elastomer (A); 0.01-10 parts by weight of poly carbodiimide (B); 0.01 to 0.5 part by weight of a phenolic heat stabilizer (C); 0.01 to 0.5 part by weight of a thio ester heat stabilizer (D); and 0.01 to 0.5 part by weight of an aromatic amine heat stabilizer (E). The hydrolysis resistant high temperature resistant thermoplastic polyester elastomer composition still can effectively maintain the tensile strength and elongation at break in the long time exposure to hygrothermal environment, after 90 days of hydrolysis resistance test of the composition dipping in hot water at the temperature of 95 DEG C, the tensile strength is maintained above 25Mpa, the elongation at break is remained above 482%; and after 168h of heat resistance test at the temperature of 158 DEG C, the tensile strength is maintained above 81%, so that the hydrolysis resistant high temperature resistant thermoplastic polyester elastomer composition can be applied in higher-end areas.

Description

technical field [0001] The invention relates to a thermoplastic polyester elastomer composition, in particular to a long-term hydrolysis-resistant and high-temperature resistant thermoplastic polyester elastomer composition. Background technique [0002] Thermoplastic polyester elastomers are widely used in various fields due to their excellent physical and mechanical properties, such as high strength, high toughness, fatigue resistance, abrasion resistance, oil resistance, chlorine resistance, good electrical properties and low temperature resistance . However, due to the general hydrolysis resistance of thermoplastic polyester elastomers, especially the poor resistance to hot water, the tensile strength and elongation at break cannot be fully maintained when exposed to humid and hot environments for a long time, which limits its application in some high-demand fields. For example, in poultry production, the service life of the product is required to reach 90 days in a wat...

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Problems solved by technology

However, this document only examines the hydrolysis resistance after immersion in hot water at 95°C for 10 days, and does not investigate the hydrolysis resistance under such stringent conditions as immersion in hot water at 95°C for 90 days, and the long-term hydrolysis resistance is not enough. Sufficient; moreover, the combination of epoxy compound and polycarbodiimide makes the melt viscosity increase excessively and the fluidity is lacking; it is easy to produce gel

[0011] It can be seen that in the prior art, the polyester elastomer composition is not ideal in terms of long-term moisture and heat durability and high temperature resistance, poor hot water resistance, and cannot fully maintain tensile strength when exposed to a humid and heat environment for a long time and elongation at break, which limit its application in some high-demand fields, so it is necessary to develop a polyester elastomer with long-term moisture and heat durability and high temperature resistance

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