Method for preparing high machinery performance halogen-free anti-flaming PBT composite and composite material

A technology for composite materials and mechanical properties, applied in the field of polymer composite materials and their preparation, can solve the problems of low mechanical properties and low mechanical properties of halogen-free flame retardant materials, and achieve high mechanical properties, outstanding mechanical properties, and flame retardant properties. excellent effect

Inactive Publication Date: 2008-09-10
刘成志
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is, aiming at the problem of low mechanical performance of the halogen-free flame-retardant material produced by the preparation method in the prior art, it provides a kind of preparation method for industrialized batch production of high-mechanical performance halogen-free flame-retardant PBT composite material method
[0004] The second technical problem to be solved by the present invention is to provide a halogen-free flame-retardant PBT composite material with high mechanical performance produced by the aforementioned method for the problem of low mechanical properties of the halogen-free flame-retardant materials in the prior art. The material not only has excellent flame retardant properties, but also has excellent environmental protection, safety, and electrical insulation properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: a kind of preparation method of high mechanical performance halogen-free flame-retardant PBT composite material, comprises the following steps:

[0038] (1) Weighing: See Table 1, weigh each raw material component according to the formula: PBT, ultrafine glass fiber, hindered phenol antioxidant, organic phosphite, toughening agent, flame retardant A, flame retardant Agent B, lubricant;

[0039] (11) Preparation of flame retardant B: after weighing hypophosphite and silane coupling agent, both are surface treated, and the specific operation steps are:

[0040] (a) Weigh the hypophosphite according to the formula, grind the hypophosphite for 1 to 10 hours, and then dry it;

[0041] (b) Place the dried hypophosphite in N 2 In an atmosphere, it is subjected to high-temperature treatment, repeated two or more times, and each time after high-temperature treatment is completed, it is cooled to room temperature;

[0042] (c) Pour the silane coupling agent onto ...

Embodiment 2

[0050] Embodiment 2: The preparation method and the composite material of the high-mechanical performance halogen-free flame-retardant PBT composite material provided by this embodiment are basically the same as in Embodiment 1, and the difference is that the screw diameter of the twin-screw extruder is 90mm, the ratio of screw length to diameter is set to 40, and the extrusion temperature is 260°C; the raw materials included in the composite material are the components and weight ratios listed in column 3 of Table 1.

Embodiment 3

[0051] Example 3: The preparation method and composite material of a kind of high mechanical performance halogen-free flame-retardant PBT composite material provided by this example are basically the same as Example 1, the difference is that the screw diameter of the twin-screw extruder The ratio of screw length to diameter is set to 38, and the extrusion temperature is 230°C; the raw materials included in this composite material are the components and weight ratios listed in column 4 of Table 1.

[0052] Table 1

[0053] raw material name

Example 1 (wt%)

Example 2 (wt%)

Example 3 (wt%)

polybutylene terephthalate

37.5

53.7

62.6

Ultrafine Glass Fiber

33

15

5

Hindered phenol antioxidant

0.2

0.4

0.5

Organic phosphite

0.3

0.2

0.5

Flame retardant A: Melamine phosphorus

salt

9

7

5

Flame retardant B: hypophosphite and

Compounds...

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PUM

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Abstract

The invention discloses a preparation method of high-mechanical property halogen-free fire-retarding PBT composite material. The preparation method comprises the following steps: (1) weighing, (2) mixing and (3) mixing milling and extrusion. The invention also discloses a composite material prepared through adopting the method. The composite material comprises the following components: PBT, ultrafine glass fiber, hindered phenol antioxidant, organic phosphorous acid ester, toughening agent, fire retardant A, fire retardant B and lubricant. The composite material has the advantages that: the fire-retarding performance of the composite material reaches to UL94V-0(0.8mm) grade, and the composite material has more outstanding mechanical property than the prior halogen-free fire-retarding system; meanwhile, because the mechanical property is equivalent to that of a halogen-containing fire-retarding system, the composite material can completely replace the prior halogen-containing fire-retarding product and halogen-free fire-retarding product; moreover, the composite material, which has simple preparation method and is easy to operate, can be widely used in household appliance spare parts and electronic product accessories, etc, and particularly in cooling fans in the IT industry.

Description

technical field [0001] The invention relates to a polymer composite material and a preparation method thereof, in particular to a preparation of a halogen-free flame-retardant PBT composite material with high mechanical properties that can be used for injection molding various household appliances and electronic product accessories that require environmental protection and flame retardancy. methods and composite materials. Background technique [0002] In the prior art, about 95% of the flame retardants used in the manufacture of flame-retardant PBT composite materials are halogen-containing flame retardants, especially bromine-containing flame retardants represented by polybrominated diphenyl ethers and polybrominated biphenyls. High efficiency, less dosage, little impact on the performance of materials, and moderate price. Its performance / price ratio is unmatched by other flame retardants. Therefore, about 70-80% of the electronic and electrical products for export in my co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/03C08K9/06B29C47/40B29B9/12C08K7/14C08K5/524C08K5/12C08L33/12
Inventor 卢文生
Owner 刘成志
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