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Flame-retardant thermoplastic polyurethane composition and foaming beads thereof

A technology of thermoplastic polyurethane and composition, which is applied in the manufacture of conductive/antistatic filaments, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems affecting molding applications, poor flame retardancy and antistatic properties, cell morphology and There are problems in the control of foaming ratio and other problems

Active Publication Date: 2019-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing thermoplastic polyurethanes and thermoplastic polyurethane foamed beads and plates prepared from them have poor flame retardancy and antistatic properties, and after flame-retardant and antistatic modification, the cell morphology and expansion ratio of thermoplastic polyurethane foam materials Control problems that affect subsequent molding applications

Method used

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  • Flame-retardant thermoplastic polyurethane composition and foaming beads thereof
  • Flame-retardant thermoplastic polyurethane composition and foaming beads thereof
  • Flame-retardant thermoplastic polyurethane composition and foaming beads thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] (1) Preparation of flame retardant

[0096] Add 7 parts by weight of triphenylphosphine oxide and 3 parts by weight of cobalt nitrate into ethanol, stir at a rate of 100rpm, and then use microwave to heat the mixture under stirring. The heating power is 50w, the temperature is 40°C, and the reaction time is 4h. The material after microwave heating reaction is carried out supercritical drying, obtains the complex Co(OPPh of the formation of triphenylphosphine oxide and cobalt nitrate 3 ) 2 (NO 3 ) 2 .

[0097] The above-prepared complex Co(OPPh 3 ) 2 (NO 3 ) 2 Mechanically stir and homogenize with magnesium hydroxide at a stirring speed of 10 rpm to obtain a flame retardant.

[0098] (2) Preparation of carbon nanofiber antistatic agent

[0099] Coal tar pitch with a carbon content of more than 80 mol% is used as a carbon source, and a mixed acid of phosphoric acid / nitric acid / hydrochloric acid (volume ratio 1:1:1) is used for grinding pretreatment to obtain a p...

Embodiment 2

[0116] (1) The preparation method of the flame retardant and (2) the preparation method of the carbon nanofiber antistatic agent are the same as in Example 1, except that the raw material formula and reaction conditions shown in Table 1 and Table 2 are the same. For example, the flame retardant formed in this embodiment is the complex Ni(OPOt) formed by trioctylphosphine oxide and nickel nitrate 3 ) 2 (NO 3 ) 2 .

[0117] (3) Preparation of thermoplastic polyurethane base resin TPU-102

[0118] The TPU resin is Elastollan 1170A.

[0119] Take by weighing 100 parts by weight of the above-mentioned thermal TPU resin, then add a lubricant (taking the weight of the above-mentioned TPU resin as 100 parts by weight, the amount of lubricant added is 0.1 part by weight), and then the mixture is added to a high-speed stirrer and mixed evenly, and then The mixed material is fed into the feeder of the twin-screw extruder manufactured by Nanjing Coperion Co., Ltd., and the material e...

Embodiment 3

[0131] (1) The preparation method of the flame retardant and (2) the preparation method of the carbon nanofiber antistatic agent are the same as in Example 1, except that the raw material formula and reaction conditions shown in Table 1 and Table 2 are the same. For example, the flame retardant formed in this embodiment is the complex Co(OPOt) formed by trioctylphosphine oxide and cobalt nitrate 3 ) 2 (NO 3 ) 2 .

[0132] (3) Preparation of thermoplastic polyurethane base resin TPU-103

[0133] The TPU resin is Elastollan 1180A.

[0134] Take by weighing 100 parts by weight of the above-mentioned TPU resin, then add a lubricant (taking the above-mentioned TPU resin as 100 parts by weight, the amount of lubricant added is 0.1 part by weight), and then the mixture is added to a high-speed stirrer and mixed evenly, and then mixed The good material is fed into the feeder of the twin-screw extruder manufactured by Nanjing Coperion Co., Ltd., and the material enters the twin-sc...

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Abstract

The invention provides a flame-retardant thermoplastic polyurethane composition which comprises thermoplastic polyurethane base resin, a flame retardant and an optional antioxidant, wherein the flameretardant comprises a complex formed by phosphine oxide and a transition metal salt. Foaming beads prepared from the thermoplastic polyurethane base resin are dense and uniform in foam pores, and thecompression strength of a prepared foamed bead molded body is very high; meanwhile, when the thermoplastic polyurethane composition provided by the invention is used in cooperation with a specific flame retardant and a specific antistatic agent, the flame retardant and the antistatic agent can generate a synergistic effect, and meanwhile, the flame retardancy and the antistatic property are improved. The foaming beads prepared from the flame-retardant thermoplastic polyurethane composition disclosed by the invention have good low-temperature impact resistance, static resistance, flame resistance, simple and convenient process, high closed pore rate and controllable density.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a flame-retardant thermoplastic polyurethane composition and foamed beads thereof. Background technique [0002] Thermoplastic polyurethane (TPU) is a kind of thermoplastic resin that can be dissolved in solvents and can be plasticized by heating. It has good properties such as oil resistance, high strength, high toughness, wear resistance and aging resistance, and has good processability. It is widely used in food, medical, sports, and aviation. aerospace and automotive fields. Microscopically, TPU is composed of two blocks (hard segment and soft segment): the hard segment is composed of diisocyanate, such as hexamethylene diisocyanate (MDI), etc.; the soft segment is composed of diols, such as butanediol Alcohol, polyether diol and polyester diol, and polyether diol and polyester diol are used more. TPU can be divided into polyether type and polyester ty...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L27/18C08L23/06C08K13/04C08K7/06C08K5/5397C08K3/34C08J9/12C08J9/228D01F9/15D01F1/09
Inventor 郭鹏吕明福张师军徐耀辉宋文波侴白舸徐萌解娜
Owner CHINA PETROLEUM & CHEM CORP
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