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Flame retardant type thermoplastic polyurethane elastomer and preparation method thereof

A thermoplastic polyurethane and elastomer technology, used in the field of polyurethane elastomers, can solve the problems of limited application and poor flame retardancy, and achieve the effects of low tensile permanent deformation, excellent flame retardancy, and uniform distribution of micropores

Inactive Publication Date: 2017-08-25
俞秀英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the thermoplastic polyurethane elastomer has good low tensile set characteristics, its flame retardancy is poor, which limits its application in real life

Method used

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  • Flame retardant type thermoplastic polyurethane elastomer and preparation method thereof
  • Flame retardant type thermoplastic polyurethane elastomer and preparation method thereof
  • Flame retardant type thermoplastic polyurethane elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Synthesis of flame retardant TPU:

[0033] In terms of weight percentage,

[0034]

[0035]

[0036] The catalyst is organic tin and organic bismuth with a mass ratio of 3:1.

[0037] The anti-aging agent is 1076 and UV-531 with a mass ratio of 7:1.

[0038] The weight-average molecular weights of the polytetrahydrofuran diol and polyoxypropylene diol are independently 1200-1300.

[0039] The nitrogen-based halogen-free flame retardant is melamine.

[0040] The chain extender is ethylene glycol.

[0041] Mix the formulated amount of polyhexamethylene adipate diol, polyether polyol, nitrogen-based halogen-free flame retardant, expandable microspheres, catalyst, anti-aging agent and chain extender, and dehydrate at 110°C for 2 hours , then lower the temperature to 80°C, add metered MDI-100, mix at 4000r / min for 2min, pour into a flat mold coated with a release agent, and mature in an oven at 90°C for 24h, and the obtained flakes are broken into Uniform particle...

Embodiment 2

[0043] Synthesis of flame retardant TPU:

[0044] In terms of weight percentage,

[0045]

[0046]

[0047] The catalyst is organic tin and organic bismuth with a mass ratio of 5:1.

[0048] The anti-aging agent is 1076 and UV-531 with a mass ratio of 4:1.

[0049] The weight-average molecular weights of the polytetrahydrofuran diol and polyoxypropylene diol are independently 1700-1800.

[0050] The nitrogen-based halogen-free flame retardants are melamine and dicyandiamide.

[0051] The chain extenders are ethylene glycol and 1,2-propanediol.

[0052]Mix the formulated amount of polyhexamethylene adipate diol, polyether polyol, nitrogen-based halogen-free flame retardant, expandable microspheres, catalyst, anti-aging agent and chain extender, and dehydrate at 110°C for 2 hours , then lower the temperature to 80°C, add metered MDI-100, mix at 4000r / min for 2min, pour into a flat mold coated with a release agent, and mature in an oven at 90°C for 24h, and the obtained...

Embodiment 3

[0054] Synthesis of flame retardant TPU:

[0055] In terms of weight percentage,

[0056]

[0057] The catalyst is organic tin and organic bismuth with a mass ratio of 4:1.

[0058] The anti-aging agent is 1076 and UV-531 with a mass ratio of 10:1.

[0059] The weight-average molecular weights of the polytetrahydrofuran diol and polyoxypropylene diol are independently 1400-1500.

[0060] The nitrogen-based halogen-free flame retardants are melamine, dicyandiamide and melamine cyanurate.

[0061] The chain extenders are ethylene glycol, 1,2-propanediol and 1,4-butanediol.

[0062] Mix the formulated amount of polyhexamethylene adipate diol, polyether polyol, nitrogen-based halogen-free flame retardant, expandable microspheres, catalyst, anti-aging agent and chain extender, and dehydrate at 110°C for 2 hours , then lower the temperature to 80°C, add metered MDI-100, mix at 4000r / min for 2min, pour into a flat mold coated with a release agent, and mature in an oven at 90°C...

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Abstract

The invention provides a flame retardant type thermoplastic polyurethane elastomer and a preparation method thereof. The flame retardant type thermoplastic polyurethane elastomer is prepared from the following raw materials in parts by weight: 22-38 parts of polyhexamethylene adipate glycol, 10-15 parts of polytetrahydrofuran glycol, 13-20 parts of polyoxypropylene glycol, 32-45 parts of diphenyl methane diisocyanate, 4-8 parts of a chain extender, 0.005-0.012 part of a catalyst, 5-12 parts of a nitrogen-containing halogen-free flame retardant, 10-16 parts of expandable microspheres and 0.5-1 part of an antiaging agent; and the catalyst is prepared from organic tin and organic bismuth with the mass ratio being (3-5) to 1. The thermoplastic polyurethane elastomer prepared by the invention has a micropore structure; through mutual synergistic effect of the nitrogen-containing halogen-free flame retardant and the expandable microspheres, the prepared thermoplastic polyurethane elastomer has excellent flame retardancy, good comprehensive properties and lower tension set characteristic.

Description

technical field [0001] The invention belongs to the technical field of polyurethane elastomers, and in particular relates to a flame-retardant thermoplastic polyurethane elastomer and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a kind of polyurethane material that can be plasticized by heating and can be dissolved by solvent. It has a unique soft and hard block copolymer structure, because it has both the elasticity of rubber and the processability of plastic. It is widely used in many fields. However, TPU is inevitably subject to stress during use. The repeated compression or stretching state makes the product easily deformed. Even if the external force is removed, the product is difficult to return to its original shape, so a certain amount of residual deformation that cannot be recovered occurs That is permanent deformation. The high permanent deformation of TPU limits its application as an elastic material. ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/40C08G18/42C08G18/48C08G18/32C08K5/3492C08K5/315C08G101/00
CPCC08G18/6607C08G18/3206C08G18/4018C08G18/4238C08G18/4825C08G18/4854C08G2101/00C08K5/3155C08K5/34922C08K5/34928
Inventor 俞秀英
Owner 俞秀英
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