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Halogen-free flame retardant hot plastic formed polycarbonate material for high-transparency film and preparation method of material

A transparent film and polycarbonate technology, which is applied in the field of halogen-free flame retardant and hot-molded polycarbonate materials, can solve the problem of poor heat resistance, toughness and appearance of films, mobile phone films cannot be hot-molded, and film transparency is reduced. and other problems to achieve the effect of improving appearance quality, scientific design, and improving flexibility

Active Publication Date: 2019-04-23
SICHUAN COREMER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A single sulfonate-based flame retardant can make the flame retardancy of PC film reach UL94VTM-0 level below 0.25mm, but due to the use of sulfonate to reduce the transparency of the film, and the use of sulfonate flame-retardant polycarbonate, its The Tg of polycarbonate is relatively high, and it cannot be hot-molded in mobile phone film above 140°C
And only use phenylene tetraphenyl bisphosphate (RDP) or bisphenol A bis (diphenyl phosphate) BDP, the addition amount must be more than 15%, the flame retardancy of PC film can reach 0.25mmUL94VTM-0 level , but at this time the film has poor heat resistance, toughness and appearance, and has lost its use value

Method used

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  • Halogen-free flame retardant hot plastic formed polycarbonate material for high-transparency film and preparation method of material
  • Halogen-free flame retardant hot plastic formed polycarbonate material for high-transparency film and preparation method of material
  • Halogen-free flame retardant hot plastic formed polycarbonate material for high-transparency film and preparation method of material

Examples

Experimental program
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Effect test

Embodiment 1

[0044] This example provides a preparation method of the halogen-free flame-retardant heat-molding polycarbonate material for highly transparent films of the present invention, specifically:

[0045] Step 1. Prepare materials: dry PC resin, copolymer, phosphorus-containing flame retardant B, silicon-containing flame retardant, anti-dripping agent, and set aside;

[0046] Step 2. Weigh the filler, dry PC resin, copolymer, silicon-containing flame retardant and anti-dripping agent from the formula, and mix them uniformly in a mixer to obtain the first mixture;

[0047] Step 3. Add the first mixture and the phosphorus-containing flame retardant A of the formulation amount, and the phosphorus-containing flame retardant B of the formulation amount after drying into the twin-screw extruder, blend and granulate, wherein, the phosphorus-containing flame retardant B Flame retardant A is injected into the twin-screw extruder through a metering pump, and phosphorus-containing flame retar...

Embodiment 2

[0050] The present embodiment provides the performance testing method of polycarbonate material of the present invention, specifically:

[0051] (1) Determination of glass transition temperature (Tg): refer to the method specified in "Differential Scanning Calorimetry (DSC) for Plastics, Part 2, Glass Transition" (Standard Number: GB / T19466.2-2004) test. The glass transition temperature of polycarbonate material is between 100°C and 120°C before it can be hot-molded.

[0052] (2) Determination of melt mass flow rate (MFR) of plastic thermoplastics: test with reference to the method specified in GB / T3582.1-2018. Among them, under the condition of 300°C and 1.2kg, the film-forming properties can only be achieved when the MFR is 8g / 10min-30g / 10min. If the melt index is high, the film-forming property is poor, and the film forming is also poor; if the melt index is too low, the film-forming property is not good. When the melt mass flow rate is 8g / 10min-30g / 10min, the specific f...

Embodiment 3

[0059] The raw material composition and the performance of the polycarbonate material of the present embodiment of the present invention are specifically shown in Table 1:

[0060] Table 1

[0061]

[0062]

[0063] As can be seen from Table 1, when the copolymer adopts methyl methacrylate-butadiene-styrene (B2), the light transmittance and hot-molding molding of the obtained polycarbonate material are better than those made by using other two copolymers. Polycarbonate material.

[0064] Flame retardancy: The raw material is 4 parts of m-phenylene tetraphenyl bisphosphate (C1) and 12 parts of polydi(phenoxy)phosphazene (D1). It can reach VTM-0 level, but it can only reach VTM-2 level at 0.05mm. With the increase of the amount of polybis(phenoxy)phosphazene (D1), the flame retardancy increases, and the amount of polybis(phenoxy)phosphazene is 16 parts, and the obtained polycarbonate material film reaches vtm-0 at 0.05mm class.

[0065] Since the MFR of PC 7027 (A2) is...

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Abstract

The invention discloses a halogen-free flame retardant hot plastic formed polycarbonate material for a high-transparency film and a preparation method of the material, and solves the problems that a polycarbonate material film added with halogen-free flame retardants difficultly reaches 0.25mm or less UL94VTM-0 level flame resistance and is poor in mechanical property and appearance quality in theprior art. The halogen-free flame retardant hot plastic formed polycarbonate material is good in transparency and hot plastic forming property. The polycarbonate material is prepared from, by weight,70-88 parts of polycarbonate resin, 0.5-2 parts of copolymers, 1-6 parts of phosphorus-containing flame retardants A, 8-16 parts of phosphorus-containing flame retardants B, 0.1-1 part of silicon-containing flame retardants, 0-2 parts of fillers and 0.1-0.8 part of antifogging agents. The preparation method of the polycarbonate material is characterized in that all raw materials are uniformly mixed and then blended and granulated by a double-screw extruder. The flame resistance of the 0.03-0.23mm thick transparent film produced by the PC (polycarbonate) material can reach UL94VTM-0 level, andthe film has good mechanical property and appearance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a halogen-free flame-retardant heat-molding polycarbonate material for highly transparent films and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is an amorphous polymer compound, odorless and transparent; it has excellent mechanical, thermal and electrical properties, especially good impact toughness, low creep, and good dimensional stability of the resulting product. PC has good heat resistance and can be used for a long time in the temperature range of -60°C to 120°C. The thermal deformation temperature of PC is 138°C (1.82MPa), its glass transition temperature is 150°C, it is in a molten state at 220°C to 230°C, and its thermal decomposition temperature is about 310°C; PC has a low water absorption rate of 0.16%, and PC is flame retardant The performance complies with UL94V-2 and is a self-extinguishing grade. Because P...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L23/08C08L51/04C08L27/18C08L85/02C08L83/04C08L35/06C08K5/523C08K5/5399
CPCC08L69/00C08L2201/02C08L2201/22C08L2203/16C08L2205/03C08L2205/035C08L23/0884C08L27/18C08L85/02C08L83/04C08K5/523C08L51/04C08L35/06C08K5/5399
Inventor 万绍群冯志强杨克斌梁全才侯俊
Owner SICHUAN COREMER CO LTD
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