Flame-retardant enhanced PBT material and preparation method thereof

A technology of PBT resin and brominated flame retardant, which is applied in the field of flame-retardant reinforced PBT materials and its preparation, can solve the problems of halogen-free flame-retardant PBT material technology and cost limitations, poor mechanical properties, and large additions, and achieve The effects of high tracking index, good mechanical properties and high ignition temperature

Inactive Publication Date: 2010-09-01
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, brominated flame retardants are the most widely used flame-retardant PBT materials, and halogen-free flame-retardant PBT materials are greatly limited by technology and cost.
It is very difficult to use brominated flame retardants to achieve GWIT 750°C without burning, and usually the amount added is relatively large, and because the existence of free bromine seriously affects the CTI value, it is difficult to reach above 250V; use halogen-free flame retardants It is easy to meet the requirements of GWIT and CTI at the same time, but in terms of mechanical properties, it is much worse than brominated flame-retardant PBT materials, and the cost is higher
These factors limit the application of PBT engineering plastics in the field of unattended electronic appliances

Method used

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  • Flame-retardant enhanced PBT material and preparation method thereof
  • Flame-retardant enhanced PBT material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The weight percentage of PBT 59.0%, PBT 60%, brominated flame retardant 10%, phosphorus nitrogen flame retardant 5%, inorganic flame retardant 3%, toughening agent 5%, lubricant 0.3%, antioxidant 0.3% Stir in a mixing barrel for 5 minutes, and then melt, extrude and granulate through a twin-screw extruder, and add 20% of long fibers from the middle section of the extruder at the same time. The processing technology is as follows: twin-screw extruder, the first zone is 200°C, the second zone is 220°C, the third zone is 220°C, the fourth zone is 220°C, the fifth zone is 190°C, the sixth zone is 190°C, the seventh zone is 210°C, and the eighth zone is 230°C; The number of revolutions of the screw is controlled at 420 to 480 revolutions per minute.

Embodiment 2

[0035] Put 50% of PBT, 7% of brominated flame retardant, 4% of phosphorus nitrogen flame retardant, 3% of inorganic flame retardant, 4% of toughening agent, 0.5% of lubricant, and 0.3% of antioxidant in the mixing tank Stir for 5 minutes, then melt, extrude and granulate through a twin-screw extruder, and at the same time add 30.0% of long fibers from the middle section of the extruder. The processing technology is as follows: twin-screw extruder, the first zone is 200°C, the second zone is 230°C, the third zone is 230°C, the fourth zone is 230°C, the fifth zone is 190°C, the sixth zone is 190°C, the seventh zone is 210°C, and the eighth zone is 230°C; The number of revolutions of the screw is controlled at 420 to 480 revolutions per minute.

Embodiment 3

[0037] Put 50% by weight of PBT, 3% of brominated flame retardant, 10% of phosphorus nitrogen flame retardant, 1% of inorganic flame retardant, 4% of toughening agent, 0.5% of lubricant, and 0.3% of antioxidant in the mixing tank Stir for 5 minutes, then melt, extrude and granulate through a twin-screw extruder, and at the same time add 30.0% of long fibers from the middle section of the extruder. The processing technology is as follows: Twin-screw extruder in the first zone 190°C, in the second zone 210°C, in the third zone 210°C, in the fourth zone 210°C, in the fifth zone 190°C, in the sixth zone 190°C, in the seventh zone 210°C, in the eighth zone 230°C; The number of revolutions of the screw is controlled at 420 to 480 revolutions per minute.

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Abstract

The invention discloses a flame-retardant enhanced PBT material and a preparation method thereof. The flame-retardant enhanced PBT material comprises the following components in percentage by weight: 45 to 60 percent of PBT resin, 3 to 10 percent of brominated flame retardant, 1 to 10 percent of phosphorus-nitrogen flame retardant, 1 to 5 percent of inorganic flame retardant, 2 to 5 percent of toughening agent, 20 to 35 percent of glass fiber, 0.3 to 1 percent of lubricating agent, and 0.1 to 0.6 percent of antioxidant. The flame-retardant enhanced PBT material has high ignition temperature of glowing filament, high comparative tracking index, and better mechanical property, and can be widely applied to the field of unattended electronic and electric products.

Description

[technical field] [0001] The invention relates to the technical field of polymer materials, in particular to a flame-retardant reinforced PBT material and a preparation method thereof. [Background technique] [0002] Polybutylene terephthalate (PBT) is a relatively new type of thermoplastic engineering plastic developed and industrialized by the American Celanese company in the 1970s. It is one of the five general-purpose engineering plastics. It is heat-resistant and weather-resistant. Good, good dimensional stability, excellent electrical properties, good arc resistance, excellent chemical resistance, maintain various physical properties (electrical properties) in a humid environment, fast crystallization speed, good formability, widely used in automobiles , electronic appliances, industrial machinery and other fields. [0003] Components in electrical and electronic products will cause local overheating and may cause combustion under conditions such as overload, short ci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/04C08K7/14B29C47/92B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/40B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 徐东徐永李超
Owner SHENZHEN KEJU NEW MATERIAL
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