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Glass fiber reinforced halogen-free flame-retardant PBT (polybutylene terephthalate) and preparation method thereof

A halogen flame retardant and glass fiber technology, applied in the field of PBT material and its preparation, can solve the problems of easy combustion, large amount of inorganic flame retardant, large molding shrinkage rate, etc., and achieve high temperature resistance, low smoke and environmental protection. Good performance and flame retardant performance

Inactive Publication Date: 2014-01-22
QINGDAO XINZHAN PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PBT materials also have shortcomings, such as poor heat resistance, large molding shrinkage, and easy to burn, etc.
At present, glass fiber reinforced flame retardant PBT mostly uses halogenated flame retardants and inorganic flame retardants such as red phosphorus, aluminum hydroxide, magnesium hydroxide, etc., and halogenated flame retardants will produce halogenated hydrogen and dioxins when burned Such toxic substances will cause great harm to people's health and the environment. Many countries have begun to restrict or ban the use of halogenated flame retardants
However, the large amount of inorganic flame retardants will seriously damage the mechanical properties of products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A glass fiber-reinforced halogen-free flame-retardant PBT, the components of which are: PBT 50%, hyposalate flame retardant CJ1002 18%, alkali-free glass fiber 25%, hindered phenol antioxidant KY- 0.5% compound of 1076 and phosphite antioxidant JC-242, 0.5% EVA wax, 5% glycidyl methacrylate grafted POE, 1% silane coupling agent.

[0020] Preparation method: (1) Mix the above components in proportion; (2) Dry PBT at 120°C-140°C for 4-6 hours, hyposate flame retardant CJ1002, alkali-free glass fiber at 100°C-120 Dry at ℃ for 30-45 minutes; (3) Put the dried PBT, hyposalate flame retardant CJ1002, and alkali-free glass fiber in a high-speed mixer, and at the same time, put the hindered phenol antioxidant KY-1076 and phosphite The compound of antioxidant JC-242, EVA wax, glycidyl methacrylate grafted POE, and silane coupling agent are placed in the same high-speed mixer and mixed evenly by the high-speed mixer; (4) Add the above-mentioned mixture In the twin-screw extruder...

Embodiment 2

[0022] A glass fiber-reinforced halogen-free flame-retardant PBT, the components of which are proportioned by mass percentage: 60% of PBT, 18% of hyposalate flame retardant CJ1002, 20% of alkali-free glass fiber, hindered phenol antioxidant KY- The compound of 1076 and phosphite antioxidant JC-242 is 0.3%, TAS-2A is 0.5%, low density polyethylene is 1%, and silane coupling agent is 0.2%.

[0023] Preparation method: (1) Mix the above components in proportion; (2) Dry PBT at 120°C-140°C for 4-6 hours, hyposate flame retardant CJ1002, alkali-free glass fiber at 100°C-120 Dry at ℃ for 30-45 minutes; (3) Put the dried PBT, hyposalate flame retardant CJ1002, and alkali-free glass fiber in a high-speed mixer, and at the same time, put the hindered phenol antioxidant KY-1076 and phosphite The compound of antioxidant JC-242, TAS-2A, low-density polyethylene, and silane coupling agent are placed in the same high-speed mixer and mixed evenly by the high-speed mixer; (4) Add the above-me...

Embodiment 3

[0025] A glass fiber-reinforced halogen-free flame-retardant PBT, the components of which are: 45% PBT, 20% hyposalate flame retardant CJ1002, 30% alkali-free glass fiber, hindered phenol antioxidant KY- 0.5% compound of 1076 and phosphite antioxidant JC-242, 0.5% calcium stearate, 3% ethylene-butyl acrylate-glycidyl ester terpolymer, 1% silane coupling agent.

[0026] Preparation method: (1) Mix the above components in proportion; (2) Dry PBT at 120°C-140°C for 4-6 hours, hyposate flame retardant CJ1002, alkali-free glass fiber at 100°C-120 Dry at ℃ for 30-45 minutes; (3) Put the dried PBT, hyposalate flame retardant CJ1002, and alkali-free glass fiber in a high-speed mixer, and at the same time, put the hindered phenol antioxidant KY-1076 and phosphite The compound of antioxidant JC-242, calcium stearate, ethylene-butyl acrylate-glycidyl ester terpolymer, and silane coupling agent were placed in the same high-speed mixer and mixed uniformly by a high-speed mixer; (4 ) Add t...

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PUM

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Abstract

The invention discloses glass fiber reinforced halogen-free flame-retardant PBT (polybutylene terephthalate) and a preparation method thereof. The glass fiber reinforced halogen-free flame-retardant PBT comprises the following components in percentage by mass: 45-60% of PBT, 18-25% of a halogen-free flame retardant, 20-35% of glass fibers, 0.1-0.6% of an antioxidant, 0.3-1% of a lubricant, 1-5% of a toughening agent and 0.2-1.5% of a coupling agent. The glass fiber reinforced halogen-free flame-retardant PBT disclosed by the invention has the beneficial effects that the halogen-free flame retardant is adopted to ensure that the glass fiber reinforced halogen-free flame-retardant PBT is good in flame retardant performance, nontoxic, low in smoke and good in environment-friendliness, the glass fibers are treated by the coupling agent to ensure that the enhancement of the high temperature resistance of the glass fibers is effectively promoted, and the antioxidant, the lubricant and the toughening agent are used by blending, so that the compatibility, flame retardance, service life and the like of the glass fiber reinforced halogen-free flame-retardant PBT product are further improved; the preparation method disclosed by the invention has the advantage of simple and easy operation.

Description

technical field [0001] The invention relates to a PBT material and a preparation method thereof, in particular to a glass fiber reinforced halogen-free flame-retardant PBT and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT) is a crystalline thermoplastic polyester resin with excellent heat resistance, weather resistance, chemical resistance, good electrical properties, low water absorption and good gloss. It is widely used in the manufacturing of electronic appliances, auto parts, machinery, household goods, etc., and is called the five general-purpose engineering plastics together with PPS, PC, POM, and PA. PBT materials also have shortcomings, such as poor heat resistance, large molding shrinkage, and easy combustion. At present, glass fiber reinforced flame retardant PBT mostly uses halogenated flame retardants and inorganic flame retardants such as red phosphorus, aluminum hydroxide, magnesium hydroxide, etc., and halogenated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/04C08K7/14C08K5/5313B29C47/92B29C48/92
CPCB29C48/40
Inventor 张正任海川
Owner QINGDAO XINZHAN PLASTIC