A kind of injection molding grade nylon engineering plastics for household appliance housing and preparation method thereof

A technology of engineering plastics and injection molding grade is applied in the field of injection molding grade nylon engineering plastics for household appliances and its preparation. Fluidity, addressing limited slip effects, low warpage effects

Active Publication Date: 2021-12-21
苏州优利金新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen that when inorganic lubricants are used in nylon engineering plastics used in home appliance casing materials in the prior art, due to the limited sliding effect of existing inorganic substances, there are defects such as poor dispersion, low sphericity, coarse and uneven particle size, etc. , which affects the processing fluidity of the material and restricts the further development and application of nylon engineering plastics

Method used

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  • A kind of injection molding grade nylon engineering plastics for household appliance housing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] a. With 28 parts by weight of bismuth alkoxide Bi(OCH2CH2OCH3)3 as a precursor, add 3 parts by weight of methanol and 69 parts by weight of water, mix well, continue to drop ammonia water to adjust the pH value to 10, react at 25 ° C for 4h, and prepare Get bismuth sol;

[0033] b. Mix 64 parts by weight of bismuth sol prepared in step a with 32 parts by weight of flake inorganic powder and 4 parts by weight of fluorine-containing carboxylic acid into a ball mill, grind and mix until a slurry is formed, then disperse by ultrasonic vibration, and Spray-dry at 65°C, pass the collected particles through a 300-mesh standard sieve to obtain the sieved particles; wherein, the flake inorganic powder is montmorillonite passed through a 100-mesh sieve, and the fluorine-containing carboxylic acid is perfluorobutyric acid;

[0034] c. Put the sieved particles obtained in step b in a muffle furnace, feed air and slowly heat up to 520°C at a rate of 5°C / min for calcination for 4 hou...

Embodiment 2

[0037] a. Using 26 parts by weight of bismuth alkoxide Bi(OCH2CH2OCH3)3 as a precursor, add 3 parts by weight of ethanol and 71 parts by weight of water, mix well, continue to drop ammonia water to adjust the pH value to 9, and react at 22 ° C for 4.5 hours, Prepare bismuth sol;

[0038] b. Mix 65 parts by weight of bismuth sol prepared in step a with 31 parts by weight of flake inorganic powder and 4 parts by weight of fluorine-containing carboxylic acid into a ball mill, grind and mix until a slurry is formed, then disperse by ultrasonic vibration, and Spray-dry at 63°C, pass the collected particles through a 300-mesh standard sieve to obtain the sieved particles; wherein, the flaky inorganic powder is pyrophyllite passed through a 100-mesh sieve, and the fluorine-containing carboxylic acid is perfluorooctanoic acid;

[0039] c. Put the sieved particles obtained in step b in a muffle furnace, feed air and slowly heat up to 510°C at a rate of 3°C / min for calcination for 4.5h,...

Embodiment 3

[0042] a. Using 28 parts by weight of bismuth alkoxide Bi(OCH2CH2OCH3)3 as a precursor, add 4 parts by weight of propanol and 68 parts by weight of water, mix well, continue to drop ammonia water to adjust the pH value to 10, and react at 28 ° C for 3.5 hours, Prepare bismuth sol;

[0043] b. Mix 61 parts by weight of bismuth sol prepared in step a with 34 parts by weight of flake inorganic powder and 5 parts by weight of fluorine-containing carboxylic acid into a ball mill, grind and mix until a slurry is formed, then disperse by ultrasonic vibration, and Spray drying at 68°C, pass the collected particles through a 300-mesh standard sieve to obtain the sieved particles; wherein, the flake inorganic powder is muscovite passed through a 100-mesh sieve, and the fluorine-containing carboxylic acid is trifluoroacetic acid;

[0044] c. Put the sieved particles obtained in step b in a muffle furnace, feed air and slowly raise the temperature to 540°C at a rate of 8°C / min for calcina...

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Abstract

The invention discloses an injection-molding grade nylon engineering plastic for a housing of a household appliance and a preparation method thereof. The nylon engineering plastic is prepared by the following steps: a. mixing bismuth alkoxide, alcohol and water and adding ammonia water dropwise to react to prepare bismuth sol; b. mixing and grinding with flake inorganic powder and fluorine-containing carboxylic acid Slurry is spray-dried, collected and sieved to obtain sieved particles; c, calcined at high temperature to obtain modified fillers; d, mixed with nylon 6 / nylon 66 composite resin, plasticizer, ABS resin, and processing aids, and then melted and extruded Granulation, that is, injection-grade nylon engineering plastics for home appliance shells with high fluidity. The method has the following beneficial effects: the invention forms a spherical bismuth oxide inorganic flow lubricating coating layer on the surface of the flake inorganic matter, and the nylon engineering plastics obtained have excellent processing fluidity, and the injection molded products have high strength, low warpage It has the characteristics of low density, easy mold filling and avoiding weld lines.

Description

technical field [0001] The invention relates to the field of household electrical appliance materials, in particular to the preparation of plastics for housings of household electrical appliances, in particular to an injection-molding grade nylon engineering plastic for housings of household electrical appliances and a preparation method thereof. Background technique [0002] Nylon 66 resin and nylon 6 resin are one of the widely used engineering plastics. They are crystalline materials with good fluidity, resistance to organic solvents, and good compatibility with glass fibers. However, they are easy to absorb water, have poor dimensional stability, and have poor heat resistance. Poor, the surface gloss is poor after glass fiber reinforcement, especially for large parts, the dimensional stability is insufficient, and the fluidity is also poor. A lubricant is a substance that improves the fluidity of polymers during molding. The resin melt usually has a high viscosity. Duri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08L77/02C08L55/02C08K13/06C08K9/10C08K3/22C08K7/00C08K5/12
CPCC08L77/06C08L2205/02C08L2205/03C08K2201/011C08L77/02C08L55/02C08K13/06C08K9/10C08K3/22C08K7/00C08K5/12
Inventor 罗春华
Owner 苏州优利金新材料有限公司
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