Modified engineering plastic and preparation method thereof
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A technology of engineering plastics and modification, which is applied in the field of engineering plastics and can solve problems such as environmental pollution
Active Publication Date: 2019-08-30
WENZHOU CITY FANHUA ENG PLASTIC
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[0005] Aiming at the deficiencies in the prior art, the present invention provides a modified engineering plast
Method used
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Embodiment 1
[0038] The components of modified engineering plastics are shown in Table 1-1, and the preparation method of modified engineering plastics includes the following steps:
[0039] S1, take each raw material according to weight part;
[0040] S2. Add PC resin, magnesium hydroxide and p-aminophenylboronic acid to the mixer, mix at 75°C for 21 minutes, and the mixing speed of the mixer is 680r / min, cool to room temperature, and obtain a premix;
[0041] S3. Add ammonium polyphosphate, 12% sodium hydroxide solution, polydimethylsiloxane and methyl ethyl ketone peroxide to the premix obtained in step S2, stir at 50°C for 10min, and stir at a speed of 400r / min, and then at a speed of 650r / min and stirred for 38min, the temperature rose to 81°C during the stirring process, and the heating rate was 4°C / min to obtain a mixture, which was cooled to room temperature;
[0042] S4. Add stabilizers, toughening agents, lubricants, antioxidants and fillers to the mixture obtained in step S3, ...
Embodiment 2
[0044] The difference from Example 1 is that, in parts by weight, the components of the modified engineering plastics are shown in Table 1-1, and the preparation method of the modified engineering plastics comprises the following steps:
[0045] S1, take each raw material according to weight part;
[0046] S2. Add PC resin, magnesium hydroxide and p-aminophenylboronic acid to the mixer, mix at 77°C for 25 minutes, and the mixing speed of the mixer is 700r / min, and cool to room temperature to obtain a premix;
[0047] S3. Add ammonium polyphosphate, 15% sodium hydroxide solution, polydimethylsiloxane and methyl ethyl ketone peroxide to the premix obtained in step S2, stir at 50°C for 13min, stirring at a speed of 420r / min, and then at a speed of 700r / min and stirred for 40min, the temperature rose to 85°C during the stirring process, and the heating rate was 4°C / min to obtain the mixture, which was cooled to room temperature;
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Abstract
The invention relates to the technical field of engineering plastics, and discloses modified engineering plastic and a preparation method thereof. The engineering plastic comprises the following components: in parts by weight, 80-90 parts of PC resin, 4-6 parts of a stabilizer, 2-5 parts of a toughening agent, 5-10 parts of a lubricant and 3-5 parts of an antioxidant BHT, and a halogen-free flameretardant is also included, and comprises 7-10 parts of p-aminophenyl boronic acid and 3-6 parts of magnesium hydroxide. The modified engineering plastic has the following advantages that a synergistic flame retardant effect is achieved by magnesium hydroxide and p-aminophenyl boronic acid, on the one hand, the amount of magnesium hydroxide can be reduced, and on the other hand, a double-layer flame retardant structure is formed through a magnesium oxide protective film and a B-O-C carbon layer, so that a better flame retardant effect is achieved.
Description
technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a modified engineering plastic and a preparation method thereof. Background technique [0002] Engineering plastics refer to industrial plastics used as industrial parts or shell materials. They are plastics with excellent strength, impact resistance, heat resistance, hardness and aging resistance. They have good high temperature resistance, corrosion resistance and wear resistance. Performance, so it can replace metal to make some mechanical parts. [0003] The vast majority of plastics are flammable substances, and plastic building materials, transportation materials, household appliances materials, etc. require plastic products to be non-combustible and have good flame retardant performance, and the smoke generation of plastics in fires is required to be small . For this reason, it is very important to choose to add flame retardants in plastic formulations. [...
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