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Preparation method of fiber glass reinforced halogen-free flame retardant PBT composition and product thereof

A composition and PBT resin technology, applied in the field of polymer materials, can solve problems such as low strength, unstable product injection molding process, and difficult processing of glass fiber reinforced halogen-free flame-retardant PBT, and achieve high fluidity, high strength, high The effect of flame retardancy

Active Publication Date: 2013-07-24
广东美塑塑料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a kind of industrialized production and use, and can be conveniently recycled to meet the current problems of glass fiber reinforced halogen-free flame-retardant PBT, which are difficult to process, low in strength, and unstable in the injection molding process. Glass fiber reinforced halogen-free flame retardant PBT for high strength and high fluidity requirements of computer connectors and heat sink materials

Method used

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  • Preparation method of fiber glass reinforced halogen-free flame retardant PBT composition and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: This implementation example provides a method for preparing a glass fiber reinforced halogen-free flame-retardant PBT composition, which includes the following steps:

[0026] (1) Take raw materials: take each component raw material by weight percentage;

[0027] (2) Pre-processing of raw materials

[0028] (a) The treatment of PBT resin: the intrinsic viscosity [η] of PBT resin=1.10±0.01dl / g, PBT resin carries out hot air circulation pre-drying earlier, and material layer thickness is lower than 30 millimeters, dries at 120 ℃ for 4 hours, removes moisture The content is controlled below 0.02%.

[0029] (b) Treatment of composite halogen-free flame retardant raw materials

[0030] The weight ratio of the three composite halogen-free flame retardants is A:B:C=93:5:2.

[0031] ① Weigh A phosphonate according to the formula, soak for 2-8 hours according to the ratio of phosphonate: 3% hydrogen peroxide = 1: 1-3, grind for 1-2 hours, and dry;

[0032] ② Ad...

Embodiment 2

[0043] Embodiment 2: Provide a kind of glass fiber reinforced halogen-free flame-retardant PBT composition, its basic technical scheme is the same as that of Example 1, the difference is that the glass fiber-reinforced halogen-free flame-retardant PBT composition includes the following parts by weight Proportion of components: polybutylene terephthalate 52.2%; composite halogen-free flame retardant 19%; alkali-free glass short fiber 25%; toughening agent 3%; primary antioxidant 0.2%; auxiliary antioxidant Agent 0.3%; lubricant 0.3%.

Embodiment 3

[0044] Example 3: This implementation example provides a glass fiber reinforced halogen-free flame retardant PBT composition, the basic technical scheme of which is the same as that of Example 1, the difference is that the glass fiber reinforced halogen-free flame retardant PBT composition includes the following Components in proportion by weight: 42.2% of polybutylene terephthalate; 19% of compound halogen-free flame retardant; 35% of short alkali-free glass fiber; 3% of toughening agent; 0.2% of main antioxidant; Antioxidant 0.3%; lubricant 0.3%.

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Abstract

The invention provides a preparation method of a fiber glass reinforced halogen-free flame retardant PBT composition, which comprises the following steps of: (1) weighing raw materials of all components by weight percent; (2) treating PBT resin and a composite halogen-free flame retardant raw material; (3) mixing by two steps, including firstly high-speed mixing and then low-speed mixing; (4) using a single screw extrusion machine for extruding and pelletizing; and (5) obtaining products. The invention also discloses a product produced by the method, which comprises the following components by weight percent: 30-70% of polybutylene terephthalate (PBT), 15-25% of composite halogen-free flame retardant, 10-40% of alkali-free short glass fiber, 0.5-5% of flexibilizer, 0.1-0.3% of main antioxidant, 0.1-0.5% of auxiliary antioxidant and 0.1-1% of lubricant. The product has high flame retardance, strength and liquidity, as well as low shrinkage ratio and convenient recovery, and is halogen-free, green and environment protective; therefore, the product is suitable for being used as materials of a computer connector and a radiator, and can be used in industrialized production.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a high-strength, high-fluidity, low-shrinkage glass fiber-reinforced halogen-free flame-retardant PBT composition and a preparation method thereof, which can be used for computer connectors and radiators. Background technique [0002] Polybutylene terephthalate, the English name polybutylece terephthalate (referred to as PBT), belongs to the polyester series, which is composed of 1.4-butanediol (1.4-Butylene glycol) and terephthalic acid (PTA) or terephthalate It is a milky white translucent to opaque, crystalline thermoplastic polyester resin formed by polycondensation of ester (DMT) and kneading process. It has the characteristics of good processing performance, fast crystallization speed, good formability, high heat resistance, good weather resistance, and good electrical insulation retention in humid environments. It is especially suitable for the manufacture of complex and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/08C08L67/02C08K13/06C08K5/5317C08K5/3492C08L83/04
Inventor 吴立国
Owner 广东美塑塑料科技有限公司