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Preparation of halogen-free flame-proof nylon 66 having high-mechanical property and composite material

A technology of composite materials and mechanical properties, applied in the field of halogen-free flame-retardant reinforced nylon 66 composite materials, can solve the problems of low mechanical properties of halogen-free flame-retardant materials, low mechanical properties of halogen-free flame-retardant materials, etc., to achieve outstanding mechanical properties, The effect of high mechanical properties and simple preparation process

Inactive Publication Date: 2008-10-08
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 to provide a kind of halogen-free flame-retardant nylon 66 composite material with high mechanical performance that can be industrially produced in batches for the problem of low mechanical properties of the halogen-free flame-retardant material produced by the preparation method in the prior art. The preparation method is simple and convenient, and the quality of the prepared product is stable
[0004] The second technical problem to be solved by the present invention is to provide a halogen-free flame-retardant nylon 66 composite material with high mechanical properties produced by the aforementioned method for the problem of low mechanical properties of the halogen-free flame-retardant materials in the prior art. Composite materials not only have excellent flame retardant properties, but also have excellent environmental protection, safety, and electrical insulation properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: A preparation method of a high-mechanical-performance halogen-free flame-retardant nylon 66 composite material, characterized in that it comprises the following steps:

[0039] (1) Weighing: Refer to Table 1, weigh each raw material component according to the formula therein: nylon 66, short glass fiber, primary antioxidant, auxiliary antioxidant, composite flame retardant, lubricant.

[0040] (11) Preparation of composite flame retardant: after weighing hypophosphite and silane coupling agent, carry out surface treatment to both, the specific operation steps are:

[0041] (a) Weigh the hypophosphite according to the formula, grind the hypophosphite for 1 to 10 hours, and then dry it;

[0042] (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 the high-temperature treatment is completed, it is cooled to room temperature, and after cooling, the hypophosphite is...

Embodiment 2

[0053] Example 2: The preparation method and composite material of the high mechanical performance halogen-free flame-retardant nylon 66 composite material provided in this example are basically the same as in Example 1, except that the screw diameter of the twin-screw extruder is 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

[0054] Example 3: The preparation method and composite material of a high-mechanical performance halogen-free flame-retardant nylon 66 composite material provided in this example are basically the same as in Example 1, except that the screw of the twin-screw extruder The diameter is 90mm, the ratio of screw length to diameter is set to 44, and the extrusion temperature is 280°C; the raw materials included in the composite material are the components and weight ratios listed in column 4 of Table 1.

[0055] Table 1

[0056] raw material name

Example 1 (wt%)

Example 2 (wt%)

Example 3 (wt%)

Nylon 66

46.5

53.7

78.6

short glass fiber

35

25

10

Secondary Antioxidant

0.2

0.4

0.5

primary antioxidant

0.3

0.2

0.5

Hypophosphite

17

20

25

montan wax

1

0.7

0.4

[0057] The performance of the halogen-free flame-retarda...

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Abstract

The invention discloses a preparation method for high-mechanical performance halogen-free flame-retardant nylon 66 composite materials, comprising the following steps: (1) weighing; (2) mixing; (3) blending and extruding. The invention also discloses a composite material prepared with the method; the composite material has the following components: nylon 66, short glass fibers, main antioxidant, auxiliary antioxidant, compound flame retardant and lubricant. The method of the invention has the advantages that the composite material has the fire-retardant performance up to UL 94 V-0 (0.8mm) level, and has more prominent mechanical properties than the existing halogen-free flame retardant system, with equivalent mechanical properties with the halogen-containing flame retardant system; therefore, the composite material of the invention can completely replace the existing halogen-containing flame-retardant products and halogen-free flame-retardant products, with easy preparation method and easy operation. The high-mechanical performance halogen-free flame-retardant nylon composite material can be widely used in home appliances, electronics parts, auto parts, and so on.

Description

technical field [0001] The invention relates to a polymer composite material, in particular to a halogen-free flame-retardant reinforced nylon 66 composite material that can be used for injection molding in industries such as electronic and electrical equipment, home appliances, and auto parts that require environmental protection and flame retardancy. Background technique [0002] In the prior art, nylon 66 is a homogeneous thermoplastic polymer formed by polycondensation of adipic acid and hexamethylenediamine, which has the advantages of high strength, wear resistance, solvent resistance, good self-lubrication and wide operating temperature range. One of the most widely used engineering plastics, it is widely used in various electronic and electrical equipment and home appliances. Since nearly 80% of the flame retardants used in the current flame-retardant nylon are halogen-containing flame retardants, especially the bromine-containing flame retardants represented by poly...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08K9/06B29C47/40B29C47/92C08K7/14C08K5/17C08K5/09B29C48/40B29C48/92
CPCB29C47/92B29C48/92B29C2948/92704B29C48/04B29C48/40B29C48/625B29C2948/92895
Inventor 卢文生
Owner 刘成志
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