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Transparent halogen-free flame-retardant PC material for UV adhesive curing and preparation method thereof

A transparent and flame retardant technology, applied in the field of transparent halogen-free flame retardant PC materials and their preparation, can solve the problems of uneven distribution of sulfonate flame retardants, affecting the performance of PC materials, poor flame retardant effect, etc. Improve efficiency and bonding effect, good weather resistance, and promote the effect of dispersion effect

Inactive Publication Date: 2020-05-01
SHANGHAI PRET COMPOSITES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a very small amount of addition will cause uneven distribution of sulfonate flame retardants in the PC system, and the flame retardant effect is not good when used alone; silicone flame retardants are mostly liquid substances, which are difficult to measure during actual processing, and processing Inconvenience and other problems, if you want to obtain a higher flame retardant level, you must increase the amount of silicone flame retardants, which will affect the performance of PC materials

Method used

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  • Transparent halogen-free flame-retardant PC material for UV adhesive curing and preparation method thereof
  • Transparent halogen-free flame-retardant PC material for UV adhesive curing and preparation method thereof
  • Transparent halogen-free flame-retardant PC material for UV adhesive curing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Weigh 96 parts of raw material PC resin, 0.6 part of main flame retardant FR350M, 0.4 part of auxiliary flame retardant SI9805, 0.6 part of UV-1577 and 0.3 part of antioxidant in high-speed mixing Stir in the machine for 3-5min, and dry in an oven;

[0034] (2) The mixture obtained in step (1) is sent into the co-rotating intermeshing twin-screw extruder through the main feed. The extruder screw diameter is 35mm, and the length-to-diameter ratio L / D is 40. It is: 240°C in the first zone, 250°C in the second zone, 255°C in the third zone, 260°C in the fourth zone, 265°C in the fifth zone, 270°C in the sixth zone, 275°C in the seventh zone, the speed of the main machine is 200-300rpm / min, and then melted and extruded , cooling, granulation, and drying to obtain a transparent flame-retardant PC that can be used for UV glue curing.

Embodiment 2

[0036] (1) Weigh 96 parts of raw material PC resin, 0.6 part of main flame retardant FR350M, 0.6 part of auxiliary flame retardant SI9805, 0.6 part of UV-9 and 0.3 part of antioxidant in high-speed mixing Stir in the machine for 3-5min, and dry in an oven;

[0037] (2) The mixture obtained in step (1) is sent into the co-rotating intermeshing twin-screw extruder through the main feed. The extruder screw diameter is 35mm, and the length-to-diameter ratio L / D is 40. It is: 240°C in the first zone, 250°C in the second zone, 255°C in the third zone, 260°C in the fourth zone, 265°C in the fifth zone, 270°C in the sixth zone, 275°C in the seventh zone, the speed of the main machine is 200-300rpm / min, and then melted and extruded , cooling, granulation, and drying to obtain a transparent flame-retardant PC that can be used for UV glue curing.

Embodiment 3

[0039] (1) Take by weight the PC resin of 97 parts of raw materials, the main flame retardant FR350M of 0.5 part, the auxiliary flame retardant SI9805 of 0.5 part, the UV-1577 of 0.3 part and the UV-9 of 0.3 part, mix in high speed Stir in the feeder for 3-5min, and dry in an oven;

[0040] (2) The mixture obtained in step (1) is sent into the co-rotating intermeshing twin-screw extruder through the main feed. The extruder screw diameter is 35mm, and the length-to-diameter ratio L / D is 40. It is: 240°C in the first zone, 250°C in the second zone, 255°C in the third zone, 260°C in the fourth zone, 265°C in the fifth zone, 270°C in the sixth zone, 275°C in the seventh zone, the speed of the main machine is 200-300rpm / min, and then melted and extruded , cooling, granulation, and drying to obtain a transparent flame-retardant PC that can be used for UV glue curing.

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Abstract

The invention discloses a highly-transparent halogen-free flame-retardant PC material capable of being used for UV adhesive curing and a preparation method thereof. The highly-transparent halogen-freeflame-retardant PC material is specifically prepared from the following raw materials in parts by weight: 94.5-99.3 parts of PC resin, 0.2-2 parts of a flame retardant, 0.2-1 part of an antioxidant and 0.1-1.5 parts of an ultraviolet light absorber. According to the invention, benzophenone and phenyltriazine ultraviolet absorbers capable of absorbing medium-waveband ultraviolet rays are preferably selected, so that the photocuring efficiency and the bonding effect of the UV adhesive can be greatly improved under the condition that the high transparency and the ultraviolet resistance of the flame-retardant PC material are kept. The halogen-free flame retardant is adopted for compounding and synergistic effect, wherein the PC material can achieve 1.0 mm-V0 flame retardance, so that the PC material has the advantages of being simple and convenient in preparation method, low in price, environmentally friendly and the like, and can be widely applied to various fields of semiconductors, automotive electronics, military industry and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a transparent halogen-free flame-retardant PC material which can be used for UV glue curing and a preparation method thereof. Background technique [0002] In the semiconductor and automobile industries, UV glue is often needed to bond plastic-plastic or plastic-metal. UV glue is also called shadowless glue, photosensitive glue, and its curing principle is the photoinitiator (or photosensitive glue) in UV curing materials. Agent) absorbs ultraviolet light (365nm) under the irradiation of ultraviolet rays to generate active free radicals or cations, triggering chemical reactions of monomer polymerization, crosslinking and grafting, and transforming the adhesive from liquid to solid within seconds. Due to the weak penetration of ultraviolet light on some plastic or translucent materials, the curing depth is limited, and the opaque parts and dead corners that c...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L83/04C08K5/42C08K5/3492C08K5/132
CPCC08L69/00C08L2201/02C08L2201/08C08L2201/10C08L2201/22C08L83/04C08K5/42C08K5/3492C08K5/132
Inventor 赵卫哲张雪张杨蔡青周文
Owner SHANGHAI PRET COMPOSITES
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