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Halogen-free fire retardation thermoplastic polyurethane plastic and preparation method thereof

A thermoplastic polyurethane and polyurethane technology, which is applied in the field of halogen-free flame retardant thermoplastic polyurethane plastics, can solve the problems of TPU's great influence on mechanical properties and difficult mixing of TPU.

Active Publication Date: 2009-11-04
上海中纺物产发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, those skilled in the field know that RDP is a relatively viscous liquid, which is difficult to mix with granular TPU and requires special feeding equipment.
Moreover, the liquid flame retardant has a great influence on the mechanical properties of TPU.

Method used

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  • Halogen-free fire retardation thermoplastic polyurethane plastic and preparation method thereof
  • Halogen-free fire retardation thermoplastic polyurethane plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] TPU: Taiwan Coating, ER-85A (polyether TPU)

[0023] Flame retardant A: hydroquinone bis(dimethylphenyl) diphosphate, which meets the requirements of structural formula I,

[0024] R1~R4 are all dimethylphenyl, n=1, melting point 9°C

[0025] Flame retardant B: resorcinol bis(diphenyl) diphosphate (RDP),

[0026] Viscosity (40°C): 600cps

[0027] Flame retardant C: triphenyl phosphate, analytically pure, Shanghai Chemical Reagent Store, melting point 4°C Add 700 parts of TPU and 300 parts of flame retardant A into TSSJ25 / 40 twin-screw extruder, temperature 1°C, screw speed 200rpm, strand cutting, vacuum drying at 9°C for 4 hours, sample testing according to ISO standard.

Embodiment 2

[0033] Flame retardant: hydroquinone bis(phenyl) diphosphate, meeting the requirements of structural formula I, R1~R4 are all phenyl groups, n=10

[0034] Add 600 parts of polyester TPU, 200 parts of flame retardant, and 200 parts of calcium carbonate into a TSSJ25 / 40 twin-screw extruder at a temperature of 200°C and a screw speed of 200rpm, pelletize strands, and vacuum dry at 9°C for 4 hours. According to the ISO standard proofing test, it is very easy to feed materials during processing, the flame retardancy has passed the UL94-V0 test, and there is no precipitation of flame retardants.

Embodiment 3

[0036] Flame retardant: hydroquinone bis(dimethylphenyl) diphosphate, meeting the requirements of structural formula I, R1~R4 are all dimethylphenyl, n=1, melting point 9°C

[0037] Add 400 parts of polyester TPU, 400 parts of polycarbonate TPU, 50 parts of flame retardant, and 150 parts of montmorillonite into the TSSJ25 / 40 twin-screw extruder at a temperature of 1 °C and a screw speed of 200 rpm. Granules, vacuum-dried at 9°C for 4 hours, tested according to ISO standards, feeding is very easy during processing, the flame retardancy has passed the UL94-V0 test, and there is no precipitation of flame retardants.

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Abstract

The invention discloses a halogen-free fire retardation thermoplastic polyurethane plastic. The polyurethane plastic comprises the following raw materials according to the weight percentage: (1) 40 to 95 percent of at least one thermoplastic polyurethane polymer; (2) 5 to 40 percent of organo-phosphate ester fire retardant with the structure shown in a formula I, wherein R1 to R4 are the same or different alkyl, cycloalkyl, benzene ring or substituent group containing benzene ring, and n is equal to 1 to 20; and (3) 0 to 20 percent of inorganic filler. The invention also provides a preparation method for the halogen-free fire retardation thermoplastic polyurethane plastic. The prepared product meets the requirements of environmental protection, maintains good mechanical properties, and has easy processing, good fire retardation and no separation of a fire retardant.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a halogen-free flame-retardant thermoplastic polyurethane plastic. Background technique [0002] Halogenated flame retardants are widely used in flame retardant plastic polyurethane (flame retardant TPU) due to their low cost and high efficiency. In recent years, with the gradual increase in environmental protection requirements, some end applications require the banning of halogen flame retardants, which requires TPU (plastic polyurethane) manufacturers to seek new halogen-free formulations. [0003] Chinese patent CN101166782 discloses the use of phosphinic acid metal salt and / or diphosphinic acid metal salt, phosphoric acid ester flame-retardant TPU elastomer, and the 1.9mm sample can reach UL94-V0 level. However, metal salts of phosphinic acid and metal salts of diphosphinic acid are very expensive, and they are insoluble during processing, so the particle size of metal salt...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K5/523C08K3/34C08K3/26
Inventor 刘森林王东庆李泽阳沈贵宏
Owner 上海中纺物产发展有限公司
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