Thermoplastic polyurethane elastomer and preparation method thereof

Abstract

The invention discloses a thermoplastic polyurethane elastomer and a preparation method thereof. The thermoplastic polyurethane elastomer is prepared from the following components in parts by weight:22 to 45 parts of diisocyanate, 45 to 63 parts of polyester polyol, 5 to 12 parts of chain extender, 2 to 5 parts of anti-aging agent, 20 to 28 parts of EPDM (ethylene-propylene-diene monomer), 10 to17 parts of elastic modifying group, 2 to 4 parts of white carbon black, 1 to 6 parts of vinyl silicone oil, and 3 to 5 parts of crosslinking agent, wherein the number-average molecular weight of theEPDM is 150000 to 200000, and the Mooney viscosity ML+4 is 48 at the temperature of 125 DEG C. The preparation method comprises the following steps of mixing and stirring the components for 1 to 2h; uniformly mixing the pre-stirred mixture, ash antimony powder and vulcanized nickel power mixture, and anti-cracking fiber group, adding into a double-screw extruder for extruding, and granulating, soas to obtain the thermoplastic elastomer. The thermoplastic polyurethane elastomer has the advantages that the anti-abrasion property, tensile strength and anti-tearing property are excellent; the thermoplastic polyurethane elastomer is suitable for meeting different working environment requirements; the effective resistance to scratch and damage of the product is improved, and the service life ofthe product is prolonged.

Description

technical field [0001] The invention relates to the technical field of polyurethane production, more specifically, it relates to a thermoplastic polyurethane elastomer and a preparation method thereof. Background technique [0002] TPU polyurethane, also known as thermoplastic polyurethane elastomer, is a kind of elastomeric polymer with a wide range of applications. Due to its own advantages such as good elasticity, flexibility, wear resistance, alkali resistance and corrosion resistance, it is widely used in gas and oil transportation. There are more and more applications in the field of hose manufacturing, gradually replacing traditional plastic hoses. [0003] The application announcement number is CN103059554A Chinese patent discloses a kind of thermoplastic polyurethane elastomer, 1,4-cyclohexane diisocyanate, polyethylene adipate, 1,4-butanediol, lubricant , water-resistant agent, inorganic nano-filler and other raw materials are mixed, heated and granulated to obtai...

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Problems solved by technology

[0004] However, as an oil and gas transportation hose, it is not only exposed to a high-temperature environment during work, but also frequently coiled and transported due to work needs, so that it is often dragged by the ground or other materials during actual use. Scratched or even scratched by sharp objects, once the hose is scratched or scratched, it will eventually lead to leakage, and even the hose will be scrapped directly, which is extremely unfavorable to production

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