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A halogen-free flame retardant glass fiber reinforced nylon

A nylon and glass fiber technology, applied in the field of glass fiber reinforced nylon, can solve the problems of easy generation of phosphine, low flame retardant efficiency, and decreased mechanical properties of finished products, and achieve excellent flame retardant efficiency, improve flame retardant performance, The effect of improving the flame retardant efficiency

Active Publication Date: 2021-01-08
JIANGSU LISIDE NEW MATERIAL
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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 and safety issues, so red phosphorus is not the best choice for glass fiber reinforced nylon materials
However, because melamine polyphosphate is easy to absorb moisture, it is inconvenient to use; at the same time, because melamine polyphosphate is low in charcoal efficiency and low in flame retardancy, the addition of melamine polyphosphate is relatively large, resulting in a decrease in the mechanical properties of the finished product. A series of problems, which limit the large-scale application of melamine polyphosphate in glass fiber reinforced nylon materials

Method used

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  • A halogen-free flame retardant glass fiber reinforced nylon
  • A halogen-free flame retardant glass fiber reinforced nylon
  • A halogen-free flame retardant glass fiber reinforced nylon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] a. Add 500mL of deionized water and 186g of melamine to a 1000mL four-neck flask equipped with a stirrer, thermometer and reflux condensing device, heat up and stir to 80°C, then slowly add 199g of 85% phosphoric acid dropwise, within about one hour The dropwise addition ends. Then keep stirring at 95°C for 2 hours. The obtained slurry was filtered, washed several times with deionized water, and dried at 120° C. to obtain 323.7 g of an intermediate.

[0060] b. Add 1000mL of deionized water and 27.1g of boric acid to a 2000mL four-necked flask equipped with a stirrer, a thermometer and a reflux condensing device, heat up to 80°C to completely dissolve the boric acid, add the 323.7g intermediate obtained in step a, and keep The temperature was 80°C, and the reaction was stirred for 3 hours. The suspension was cooled, filtered and washed several times with deionized water, then dried at 120°C to yield 316.4 g of intermediate product.

[0061] c. Heat-treat 316.4 g of t...

Embodiment 2

[0087] a. Add 500mL of deionized water and 186g of melamine to a 1000mL four-neck flask equipped with a stirrer, thermometer and reflux condensing device, heat up and stir to 60°C, slowly add 154g of 85wt% phosphoric acid dropwise, within about one hour Plus end. Stirring at 80° C. for 1 hour to complete the reaction, the obtained slurry was filtered, washed with deionized water several times, and then dried at 120° C. to obtain 289.9 g of an intermediate.

[0088] b. Add 800mL of deionized water to a 2000mL four-neck flask equipped with a stirrer, thermometer and reflux condensing device, add 31.7g of boric acid, heat up and stir to completely dissolve the boric acid, continue to heat up to 90°C, and add the obtained in step a 289.9g of the intermediate was then reacted with stirring at 100°C for 3.5h. The suspension was cooled, filtered and washed several times with deionized water, then dried at 120°C to yield 289.5 g of intermediate product.

[0089] c. Heat-treat 289.5 ...

Embodiment 3

[0093] a. Add 500mL of deionized water and 186g of melamine to a 1000mL four-necked flask equipped with a stirrer, a thermometer and a reflux condensing device, heat up and stir to 100°C, slowly add 199g of 85wt% phosphoric acid dropwise, within about one hour Plus end. Stirring at 90° C. for 2 hours to complete the reaction, the obtained slurry was filtered, washed with deionized water several times, and then dried at 120° C. to obtain 332.1 g of an intermediate.

[0094] b. Add 1000mL of deionized water and 31.1g of boric acid to a 2000mL four-necked flask equipped with a stirrer, thermometer and reflux condensing device, heat up and stir to completely dissolve the boric acid, continue to heat up to 100°C, and add 332.1g of boric acid obtained in step a g intermediate, keep the temperature at 92°C, and stir the reaction for 3h. The suspension was cooled, filtered, washed several times with deionized water, and dried at 140°C to yield 313.9 g of intermediate product.

[009...

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Abstract

The invention discloses halogen-free flame-retardant glass fiber reinforced nylon. The halogen-free flame-retardant glass fiber reinforced nylon comprises, by weight, 30-60% of nylon, 20-40% of glassfiber and 10-30% of a halogen-free flame-retardant compound system, wherein the halogen-free flame-retardant compound system comprises, by weight, 60-85% of organic hypophosphite, 13-35% of polyphosphoboric acid melamine salt and 2-8% of a charring agent. The structural formula of the polyphosphoboric acid melamine salt is shown in the formula (I); in the formula, m refers to the molar ratio of two structural units including polyphosphoric acid melamine and boric acid, and m is equal to 3-6. The halogen-free flame-retardant glass fiber reinforced nylon adopts the novel halogen-free flame-retardant compound system, and the halogen-free flame-retardant compound system is low in solubility and high in char yield, so that the prepared halogen-free flame-retardant glass fiber reinforced nylon has an excellent flame-retardant effect and can reach the flame-retardant standard of UL94-V0(1.6mm). The formula is shown in the description.

Description

technical field [0001] The invention relates to the technical field of glass fiber reinforced nylon, in particular to a halogen-free flame-retardant glass fiber reinforced nylon. Background technique [0002] Glass fiber reinforced nylon (mainly nylon 66, nylon 6) is widely used in the field of electronic appliances due to its good rigidity and impact resistance, low warpage, high dimensional stability, and good surface appearance. . Usually nylon is a flammable material, but when it is compounded with glass fiber, glass fiber reinforced nylon becomes easier to burn due to the wick effect of glass fiber, so the flame retardant treatment of glass fiber reinforced nylon becomes an inevitable demand , and the existence of the wick effect makes it more difficult to flame retardant. [0003] At present, for the flame retardancy of glass fiber reinforced nylon materials, there are two basic types of flame retardant systems: halogen flame retardant systems and non-halogen flame r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08K13/04C08K7/14C08K5/3492C08K3/22C08K3/38C08K3/24C08K3/32C08K5/5313C08J5/04C08J5/10
CPCC08J5/043C08J5/10C08J2377/06C08K3/24C08K5/34928C08K5/5313C08K7/14C08K13/04C08K2003/2296C08K2003/321C08K2003/387
Inventor 李金忠杨建伟
Owner JIANGSU LISIDE NEW MATERIAL
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