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Ultrathin halogen-free flame retardant polycarbonate film and preparation method thereof

A technology of flame-retardant polycarbonate and polycarbonate, which is applied in the field of polycarbonate film and its preparation, can solve the problems of polycarbonate film that cannot reach the flame-retardant level, reduce flame retardancy, and poor support, and achieve excellent appearance, High flame retardant efficiency and good compatibility

Inactive Publication Date: 2013-01-09
SICHUAN LONGHUA FILM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for thin polycarbonate film, its flame retardancy is obviously reduced, because the thinner the film, the larger the specific surface in contact with air, and at the same time, the poorer its support, and the easier it is to drip
With the rapid development of science and technology, electronic components such as mobile phones, computers, TVs, air conditioners, power supplies, MP 3, MP4, etc. New requirements, such as 201110184527.0 announced that a flame-retardant polycarbonate film in the thickness range of 0.25mm to 0.76mm can reach UL94VTM-0 grade, but the flame-retardant grade of polycarbonate film below 0.25mm cannot reach UL94 VTM-0 level, which can no longer fully meet the needs of existing technologies

Method used

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  • Ultrathin halogen-free flame retardant polycarbonate film and preparation method thereof
  • Ultrathin halogen-free flame retardant polycarbonate film and preparation method thereof
  • Ultrathin halogen-free flame retardant polycarbonate film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The mass percentage of polycarbonate resin is 45% to 99%.

[0028] The flame retardant used in the halogen-free flame retardant system is an inorganic flame retardant, and its mass percentage is 0.5% to 40%, and the preferred range is 15% to 40%.

[0029] The mass percentage of the anti-dripping agent is 0.1% to 2%.

[0030] The modifier is one or more of the toughening agent, flame retardant synergist, flame retardant and smoke suppressor, ultraviolet absorber, impact modifier and antistatic agent, and the mass percentage is 0.2% to 10% %.

[0031] The auxiliary agent is one or more of thermo-oxygen stabilizer, light stabilizer, dispersant, compatibilizer and colorant, accounting for 0.2% to 3% by mass.

[0032] The preparation method step of ultra-thin halogen-free polycarbonate film in the present embodiment is as follows:

[0033] a) Preparation of flame retardant polycarbonate masterbatch

[0034] Pre-dry polycarbonate, halogen-free flame retardant, anti-drippi...

Embodiment 2

[0041] The mass percentage of polycarbonate resin is 45% to 99%.

[0042] The flame retardant used in the halogen-free flame retardant system is a phosphorus-containing flame retardant, and its mass percentage is 0.5% to 40%, and the preferred range is 5% to 40%.

[0043] The mass percentage of the anti-dripping agent is 0.1% to 2%.

[0044] The modifier is one or more of the toughening agent, flame retardant synergist, flame retardant and smoke suppressor, ultraviolet absorber, impact modifier and antistatic agent, and the mass percentage is 0.2% to 10% %.

[0045] The auxiliary agent is one or more of thermo-oxygen stabilizer, light stabilizer, dispersant, compatibilizer and colorant, accounting for 0.2% to 3% by mass.

[0046] The preparation method of the ultra-thin halogen-free polycarbonate film in this example is the same as that in Example 1.

[0047] The flame retardant is a phosphorus-containing flame retardant, and the ultra-thin halogen-free polycarbonate film i...

Embodiment 3

[0051] The mass percentage of polycarbonate resin is 45% to 99%.

[0052] The flame retardant used in the halogen-free flame retardant system is a silicon-containing flame retardant, and its mass percentage is 0.5% to 40%, and the preferred range is 2% to 40%.

[0053] The mass percentage of the anti-dripping agent is 0.1% to 2%.

[0054]The modifier is one or more of the toughening agent, flame retardant synergist, flame retardant and smoke suppressor, ultraviolet absorber, impact modifier and antistatic agent, and the mass percentage is 0.2% to 10% %.

[0055] The auxiliary agent is one or more of thermo-oxygen stabilizer, light stabilizer, dispersant, compatibilizer and colorant, accounting for 0.2% to 3% by mass.

[0056] The preparation method of the ultra-thin halogen-free polycarbonate film in this example is the same as that in Example 1.

[0057] The flame retardant is a silicon-containing flame retardant, and the ultra-thin halogen-free polycarbonate film is prepa...

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Abstract

The invention discloses an ultrathin halogen-free flame retardant polycarbonate film and a preparation method thereof. Materials of the ultrathin halogen-free flame retardant polycarbonate film comprise 45% to 99% of polycarbonate resins, 0.5% to 40% of halogen-free flame retardant, 0.1% to 2% of anti-drip agents, 0.2% to 10% of modifying agents and 0.2% to 3% of auxiliaries, the materials are fully and uniformly mixed through a high-speed mixer, the mixed materials enter into a twin-screw extruder from a feeding machine to be subjected to melt extrusion granulation, and granular materials enter into the extruder from the feeding machine to prepare the film. According to the developed ultrathin halogen-free flame retardant polycarbonate film, the flame retardant rating can reach to UL94 VTM-0 grade in a thickness range from 0.025mm to 0.100mm, the relative heat resistance index can reach to 80 DEG C to 130 DEG C, and the ultrathin halogen-free flame retardant polycarbonate film is stable in performances and environment-friendly.

Description

technical field [0001] The invention relates to a polycarbonate film and a preparation method thereof, in particular to an ultra-thin halogen-free flame-retardant polycarbonate film and a preparation method thereof. Background technique [0002] Polycarbonate (PC) has comprehensive and balanced mechanical properties, dimensional stability and heat resistance, especially known for its excellent impact strength and creep resistance. The visible light transmittance of PC resin is more than 90%, the thermal decomposition temperature is high, and it has excellent electrical insulation. It is widely used in many fields such as machinery, automobiles, aerospace, construction, electronics, electrical, office and household products. [0003] In order to meet the high requirements for the flame retardancy of polycarbonate films in certain application fields, it must be flame-retardant treated. Traditional flame retardants often use halogen-containing flame retardants, although most ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08J3/22B29C69/00B29B9/06B29L7/00
Inventor 刁锐敏胥鈺杨凯
Owner SICHUAN LONGHUA FILM CO LTD
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