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Halogen-free flame-retardant TPU encapsulation material and preparation method thereof

A technology of encapsulation and flame retardant, which is applied in the field of chemical synthesis and can solve the problems of poor product fluidity, insufficient physical strength, and molten droplets.

Active Publication Date: 2021-06-08
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TPU itself has poor flame retardancy, and has disadvantages such as flammability, large smoke generation, and molten droplets, which restrict its application in automotive parts and other fields.
At the same time, in terms of compound modification processing application technology, secondary processing is used in the actual processing process. The finished TPU product is mixed with a physical property enhancer, and then secondary processing is performed through a single-screw or twin-screw extruder. Secondary processing and granulation lead to high-temperature cracking of TPU products when they are melted and mixed at high temperature in the extruder, and solid additives and TPU products are easy to mix and disperse unevenly, resulting in poor fluidity of products, resulting in insufficient physical strength

Method used

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  • Halogen-free flame-retardant TPU encapsulation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In terms of parts by weight, polytetrahydrofuran glycol (PTMG-1000): 38.45 parts are added to reactor A, and the set temperature is 105°C; MDI-100: 17.75 parts, placed in reactor B, and the set temperature is 65°C ; 1,4-butanediol: 2.96 parts, placed in the C reactor, set the temperature at 60°C; the mixed material was injected into the twin-screw reactor, the isocyanate index was controlled at 0.99-1.03, and passed through the side with a metering and mixing system Add flame retardant aluminum diethyl hypophosphite dispersed with 8 parts of plasticizer diethylene glycol dibenzoate to the feed port: 13 parts, flame retardant melamine polyphosphate: 9 parts, flame retardant hydroxide Magnesium: 5 parts, 0.25 parts each of Irganox 1076, antioxidant 168, 0.15 parts each of Tinuvin 292, UV-P, catalyst (T-9): 0.04 parts, and then processed by screw extrusion injection and underwater pelletizing Granulate and dry to obtain the halogen-free flame-retardant TPU elastomer materi...

Embodiment 2

[0040] In terms of parts by weight, polytetrahydrofuran glycol (PTMG-2000): 49.06 parts are added to reactor A, and the set temperature is 98°C; MDI-100: 21.02 parts, placed in reactor B, and the set temperature is 55°C ; 1,4-butanediol: 5.39 parts, placed in the C reactor, set the temperature at 45 ° C, the mixed material was injected into the twin-screw reactor, the isocyanate index was controlled at 0.99-1.03, and passed through the side with a metering and mixing system Add aluminum diethyl hypophosphite dispersed with 4 parts of plasticizer diethylene glycol dibenzoate: 9 parts, melamine cyanurate: 6 parts, aluminum oxide: 3 parts, Irganox 1010, anti Each 0.15 part of oxygen agent 626, each 0.1 part of Tinuvin 770, Tinuvin 328, catalyst (T-9): 0.03 part, then through screw extrusion injection processing, granulate and dry by the mode of underwater pelletizing, obtain the non- Halogen flame retardant TPU elastomer material.

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Abstract

The invention belongs to the technical field of chemical synthesis, and in particular relates to a halogen-free flame-retardant TPU encapsulation material and a preparation method thereof. Including the following raw materials: polyol, diisocyanate, chain extender, antioxidant, light stabilizer, catalyst, halogen-free primary flame retardant, synergistic flame retardant, plasticizer. The main halogen-free flame retardant is one or more of the series flame retardants of organic hypophosphite metal salt, rare earth hypophosphite or melamine derivatives; the synergistic flame retardant is aluminum hydroxide, magnesium hydroxide, aluminum oxide or oxide One or more of magnesium. The invention also provides a preparation method thereof. Polyhydric alcohol, diisocyanate and chain extender are mixed, additives dispersed with a plasticizer are continuously added through a side feeding port, and then extruded by a screw for granulation to obtain a product. The invention has excellent flame retardant performance, mechanical performance and processing performance, can realize self-extinguishing, does not produce hydrogen halide gas which is harmful to the environment when burned in the air, and is highly efficient and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a halogen-free flame-retardant TPU encapsulation material and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer has good chemical corrosion resistance, electrical insulation, low temperature flexibility, wear resistance and weather resistance, prolongs the durability and service life of the material, and is widely used. However, TPU itself has poor flame retardancy, and has disadvantages such as flammability, large smoke generation, and molten droplets, which restrict its application in automotive parts and other fields. At the same time, in terms of compound modification processing application technology, secondary processing is used in the actual processing process. The finished TPU product is mixed with a physical property enhancer, and then secondary processing is performed through a single-screw or twin-sc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08K13/02C08K3/22C08K5/3492C08K5/5313C08K5/12C08G18/76C08G18/66C08G18/48C08G18/32
CPCC08G18/3206C08G18/4854C08G18/6674C08G18/7671C08K3/22C08K5/12C08K5/34928C08K5/5313C08K13/02C08K2003/2224C08K2003/2227C08L2201/02C08L2201/22C08L75/08
Inventor 陈淑海宋小娜贺宽宽彭程
Owner SHANDONG INOV POLYURETHANE
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