A kind of anti-yellowing reinforced nylon 66 material and preparation method thereof

A technology of anti-yellowing and nylon, applied in the field of polymers, can solve the problems of damaging the high strength of nylon 66, difficult to disperse uniformly, and limited effect, and achieve the effect of inhibiting oxidative discoloration and solving easy yellowing

Active Publication Date: 2020-09-11
SUZHOU POLYMER NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for polymer materials, the above two methods have disadvantages; the direct addition of antioxidants is difficult to disperse evenly due to the low addition amount, so the effect is limited; and the direct addition of low discoloration materials to prepare alloys will damage nylon 66. high strength

Method used

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  • A kind of anti-yellowing reinforced nylon 66 material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Stir and mix 1.2kg of maleic anhydride, 0.5kg of sodium phosphate and 0.5kg of silane coupling agent KH550 evenly, add 10000ml of ethanol to disperse alcoholysis, adjust the pH value of the solution to 3.2, and obtain a special slurry for processing glass fiber; then mix 48kg of The alkali glass fiber is infiltrated with special slurry and dried to obtain surface-treated special glass fiber; add 100kg of nylon 66, 10kg of nylon 612 and 0.5kg of antioxidant 1098 into a low-speed mixer and mix evenly. Add a small amount of white oil for adhesion to obtain a premix; finally add the premix to the main feeding bin of the twin-screw extruder, add the treated special glass fiber through side feeding, and the extrusion temperature is 240 Between ℃; pull rods, cool and cut into pellets. Dry the particles in an oven at 80°C for 5 hours, then inject standard ISO sample strips and standard swatches, and then bake the standard swatches in an oven at 140°C for 4 hours to test the b v...

Embodiment 2

[0030] Stir and mix 1kg of acrylic acid monomer, 1kg of iron phosphate and 0.5kg of silane coupling agent KH550 evenly, add 10000ml of ethanol to disperse alcoholysis, adjust the pH value of the solution to 3.8, and obtain a special slurry for processing glass fiber; then pass 53kg of glass fiber through The special slurry is infiltrated and dried to obtain the surface-treated special glass fiber; 100kg of nylon 66, 20kg of nylon 610, 0.5kg of antioxidant 1098, and 0.5kg of antioxidant 445 are added to a low-speed mixer and mixed evenly. During the process, a small amount of white oil is added for adhesion to obtain a premix; finally, the premix is ​​added to the main feeding bin of the twin-screw extruder, and the treated special glass fiber is added through side feeding, and the extrusion temperature Between 270°C; pull strips, cool, and cut into pellets. Dry the particles in an oven at 80°C for 5 hours, then inject standard ISO sample strips and standard swatches, and then ...

Embodiment 3

[0032] Stir and mix 1.5kg of maleic anhydride, 1.5kg of calcium phosphate and 0.5kg of silane coupling agent KH550 evenly, add 10000ml of ethanol to disperse alcoholysis, adjust the pH value of the solution to 3.2, and obtain a special slurry for processing glass fiber; then mix 58kg of glass The fibers are infiltrated with special slurry and dried to obtain surface-treated special glass fibers; 100kg of nylon 66, 30kg of nylon 1012 and 0.5kg of antioxidant 1098 are added to a low-speed mixer and mixed evenly. During the mixing process, a small amount of The white oil is adhered to obtain the premix; finally, the premix is ​​added to the main feeding bin of the twin-screw extruder, and the treated special glass fiber is added through side feeding, and the extrusion temperature is above 240°C Between; strips, cooled, diced. Dry the particles in an oven at 80°C for 5 hours, then inject standard ISO sample strips and standard swatches, and then bake the standard swatches in an ov...

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Abstract

The invention provides an anti-yellowing reinforced nylon 66 material and a preparation method thereof. The preparation method comprises steps as follows: functional monomers and phosphate heat stabilizers are dispersed in coupling agents, ethanol is added for dilution and alcoholysis, and PH value of a slurry is adjusted to be 3.2-3.8; glass fiber is soaked in the prepared slurry and dried, and processed glass fiber is obtained; nylon 66, long-carbon-chain nylon and antioxidants are evenly mixed by a high-speed mixer and added from a main feeding port of a twin-screw extruder, the processed glass fiber is added from a side feeding port and subjected to extrusion, bracing and pelletizing, and the anti-yellowing reinforced nylon 66 material is obtained. The anti-yellowing performance of the prepared material is far higher than that of other ordinary reinforced materials.

Description

technical field [0001] The invention relates to the field of polymers, in particular to an anti-yellowing reinforced nylon 66 material and a preparation method thereof. Background technique [0002] As an engineering plastic, nylon 66 is widely used in different industries such as automobiles, electronic appliances, and civil products; especially after being reinforced with glass fiber, its strength and heat resistance are greatly improved, and its application range is also greatly expanded. However, due to the strong reducibility of the amide bond in its molecular structure, it is easily oxidized and turned yellow during the drying process and injection molding process, which limits its application in light-colored products. [0003] At present, there are two main ways to improve the discoloration of nylon 66. One is to directly add antioxidants to alleviate discoloration; the other is to prepare alloys by adding similar materials with low discoloration. [0004] However, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08K13/06C08K9/04C08K9/06C08K9/02C08K7/14C08K5/20
CPCC08L77/06C08L2201/08C08L2205/025C08K13/06C08K9/04C08K9/06C08K9/02C08K7/14C08K5/20
Inventor 黄金鹏翟红波韦洪屹杨振枢
Owner SUZHOU POLYMER NEW MATERIALS TECH
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