Halogen-free flame-retardant compounding system coordinated with organic aluminum phosphite and application of same to glass fiber reinforced engineering plastics

A technology of organic aluminum phosphite and engineering plastics, which is applied in the field of halogen-free flame retardants, and can solve problems such as loss, generation of toxic gas, and easy precipitation

Inactive Publication Date: 2018-06-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For red phosphorus, although its flame retardant effect is good, it faces two problems: one is the color of red phosphorus, which limits its application range, and is usually only used in black products; the other is that it is easy to generate phosphine during processing and other highly toxic substances, which bring environmental protection and safety problems, so red phosphorus is not the best choice for glass fiber reinforced engineering plastics
However, there are still some shortcomings in the phosphorus-nitrogen complex system based on diethylaluminum hypophosphite, which are mainly manifested in: first, the two components will react and decompose at high temperature, resulting in a small amount of acid gas. It will corrode the metal parts of the processing equipment, and the parts need to be replaced after a certain period of time, which

Method used

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  • Halogen-free flame-retardant compounding system coordinated with organic aluminum phosphite and application of same to glass fiber reinforced engineering plastics
  • Halogen-free flame-retardant compounding system coordinated with organic aluminum phosphite and application of same to glass fiber reinforced engineering plastics
  • Halogen-free flame-retardant compounding system coordinated with organic aluminum phosphite and application of same to glass fiber reinforced engineering plastics

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0059] Example 1

[0060] The halogen-free flame retardant compound flame retardant system is used in glass fiber reinforced nylon, and the performance of the flame retardant is investigated according to the following steps and test methods.

[0061] (1) Mixing of halogen-free flame retardant systems

[0062] Add the pre-weighed components of the compound flame retardant system and other additives in the high mixer, start high-speed stirring, and stir for 10 minutes to complete the mixing of the halogen-free flame retardant system powder and discharge.

[0063] (2) Extrusion granulation of materials

[0064] Set the temperature of each zone of the twin-screw extruder at a predetermined temperature. After the temperature stabilizes for 20 minutes, add the nylon system from the hopper, the glass fiber is added through the glass fiber port, and the halogen-free flame retardant system powder is fed through the powder feeding hole to start The main machine and feeder complete the extrusion ...

Example Embodiment

[0083] Example 2

[0084] The implementation process is the same as in Example 1, except that the proportion of diethyl aluminum hypophosphite is maintained, and the proportions of methyl aluminum phosphite, melamine aluminum phosphite and zinc stannate are adjusted, and the total amount of the flame retardant system remains unchanged. See Table 2 for other materials and ratios, and see Table 2 for the results of the materials.

Example Embodiment

[0085] Example 3

[0086] The implementation process is the same as in Example 1, except that the ratio of diethyl aluminum hypophosphite and methyl aluminum phosphite is adjusted, and the total amount of the flame retardant system is kept unchanged. See Table 2 for other materials and ratios, and see Table 2 for the results of the materials.

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Abstract

The invention discloses a halogen-free flame-retardant compounding system coordinated with organic aluminum phosphate. The compounding system comprises the following raw materials: in terms of a totalweight of 100%, 40-90% of aluminum diethylhypophosphite, 10-30% of organic aluminum phosphate, 1-20% of melamine metal phosphate and 1-15% of zinc stannate. The organic aluminum phosphate has a structural formula as shown in a formula (I) which is described in the specification. In the formula, R is selected from a group consisting of a straight-chain fatty acid saturated alkyl group with a carbon number of 1-6, a straight-chain fatty acid unsaturated alkyl group with a carbon number of 1-6 and an aryl group. The invention discloses the novel o halogen-free flame-retardant compounding systemcoordinated with organic aluminum phosphate. The halogen-free flame-retardant compounding system has the characteristics of high flame retardancy, no migration, no corrosion to equipment and the like,and can be applied to glass fiber reinforced engineering plastics to prepare halogen-free flame-retardant glass fiber reinforced engineering plastic materials used for the preparation of parts or products of electronic appliances.

Description

technical field [0001] The invention relates to the technical field of halogen-free flame retardants, in particular to a halogen-free flame-retardant composite system synergized with organic aluminum phosphite and its application in glass fiber reinforced engineering plastics. Background technique [0002] Glass fiber reinforced engineering plastics (such as various nylons, polyesters, etc.) are widely used in electronic appliances due to their good rigidity and impact resistance, low warpage, high dimensional stability, and good surface appearance. field. Applications in these fields require flame retardant materials, and most engineering plastics are flammable materials. After compounding with glass fibers, glass fiber reinforced engineering plastics are easier to burn due to the wick effect of glass fibers. Therefore, when glass fiber reinforced engineering plastics are applied in these fields, it is necessary to solve the problem of flame retardancy, and the existence o...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L67/02C08K5/5313C08K5/5393C08K3/24C08J5/04
CPCC08J5/043C08J2367/02C08J2377/02C08K3/24C08K5/5313C08K5/5393C08K2201/014
Inventor 雷华文韵豪李振华鲁阳
Owner ZHEJIANG UNIV
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