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Carbon black master batch for polycarbonate engineering plastic and preparation method of carbon black master batch

A technology of polycarbonate and engineering plastics, applied in the field of carbon black masterbatch of polycarbonate engineering plastics and its preparation, can solve the problem of poor flow characteristics, wear resistance, oil resistance and low temperature impact resistance, injection molding Trouble and other problems, to achieve the effect of reducing melt viscosity, weakening the agglomeration effect, and improving processing fluidity

Inactive Publication Date: 2021-09-17
林文丹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polycarbonate, referred to as PC, is an amorphous engineering plastic. It is widely used in various fields due to its mechanical properties such as high strength and elastic modulus, high impact strength, and wide operating temperature range. However, its wear resistance, oil resistance The low-temperature impact resistance and low-temperature impact resistance are not ideal, and its flow characteristics are poor, which brings some troubles to injection molding

Method used

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  • Carbon black master batch for polycarbonate engineering plastic and preparation method of carbon black master batch
  • Carbon black master batch for polycarbonate engineering plastic and preparation method of carbon black master batch
  • Carbon black master batch for polycarbonate engineering plastic and preparation method of carbon black master batch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of preparation method of dispersant that present embodiment relates to comprises the steps:

[0042] (1) In a reaction kettle equipped with a water separator and a thermometer, feed nitrogen gas, add pentaerythritol, mercaptopropionic acid, methanesulfonic acid, and cyclohexane, start stirring, and heat to 100°C to reflux and separate water to reach the theoretical water output Stop the reaction afterward, remove hexanaphthene, and wash and filter with water, obtain the first intermediate after removing water;

[0043] (2) After vacuumizing PTMG1000 (polytetrahydrofuran) and BDO (1,4-butanediol) at 110°C to remove water, add dibutyltin dilaurate and MDI (diphenylmethane-4,4'- diisocyanate), heated up to 100°C, and reacted for 3 hours to obtain an NCO-terminated thermoplastic polyurethane with an R value of 1.1; then add the first intermediate to continue the reaction for 2 hours to obtain the second intermediate;

[0044] (3) Dissolve the second intermediate, ph...

Embodiment 2

[0048] A kind of preparation method for the carbon black masterbatch of polycarbonate engineering plastics that the present embodiment relates to comprises the steps:

[0049] S1. Add 35 parts of carbon black and 10 parts of dispersant (A1) into N-methylpyrrolidone, perform ultrasonic dispersion and mixing, and dry after mixing evenly;

[0050] S2. Dry the polycarbonate (melt flow rate is 10g / 10min) at 150°C until the humidity is less than 0.02%;

[0051] S3. Mix the mixture obtained in step S1 with 55 parts of dried polycarbonate carrier resin, 0.01 part of PPA2511 and 1 part of N, N'-bis-(3-(3,5-di-tert-butyl-4-hydroxyl Phenyl) propionyl) hexamethylenediamine is dropped into speed and mixes for 900r / min high-speed mixer;

[0052] S4. The pre-mixture obtained in step S2 is melted and pressed into tablets, and then extruded through high-speed banburying and water-cooled pelletizing to obtain carbon black masterbatches for polycarbonate engineering plastics.

Embodiment 3

[0054] A kind of carbon black masterbatch preparation method for polycarbonate engineering plastics that the present embodiment relates to comprises the following steps:

[0055] S1. Add 45 parts of carbon black and 10 parts of dispersant to N-methylpyrrolidone, perform ultrasonic dispersion and mixing, and dry after mixing evenly;

[0056] S2. Dry the polycarbonate (melt flow rate is 10g / 10min) at 150°C until the humidity is less than 0.02%;

[0057] S3. put the mixture obtained in step S1 and 45 parts of dried polycarbonate carrier resin, 0.05 part of PPA3511 and 1 part of 2.4-dimethyl-6-styrene phenol into a high-speed mixer with a speed of 900r / min mix;

[0058] S4. The pre-mixture obtained in step S2 is melted and pressed into tablets, and then extruded through high-speed banburying and water-cooled pelletizing to obtain carbon black masterbatches for polycarbonate engineering plastics.

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Abstract

The invention relates to a macromolecular polymerization technology, in particular to a carbon black master batch for polycarbonate engineering plastic. The carbon black master batch comprises 35-45 parts of carbon black, 45-55 parts of polycarbonate carrier resin, 10-15 parts of a dispersing agent, 0.01-0.05 part of a polymer processing aid and 0.1-1 part of an antioxidant. The invention also provides a preparation method of the carbon black master batch for the polycarbonate engineering plastic. The carbon black master batch for the polycarbonate engineering plastic has the characteristics of excellent dispersity, high blackness, high gloss, excellent processing fluidity, excellent low-temperature impact strength and the like, and has excellent compatibility with the polycarbonate engineering plastic.

Description

technical field [0001] The invention belongs to the technical field of polymer polymerization, and more specifically relates to a carbon black masterbatch of polycarbonate engineering plastics and a preparation method thereof. Background technique [0002] Carbon black is an amorphous carbon with a surface area ranging from 10 to 3000 m 2 / g, the particle size is 10-100nm. As a black colorant, carbon black has strong coloring power and excellent properties such as filling, reinforcement, anti-aging and antistatic, and is widely used in the fields of plastics and rubber. When carbon black is added in the production of plastics, it can cause pollution problems such as flying particles and dust. In order to solve this problem, the plastic industry is gradually switching to carbon black masterbatch instead of using carbon black directly. However, carbon black is one of the most difficult pigments to disperse, and the smaller the primary particle size of carbon black, the larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L75/08C08K3/04C08J3/22
CPCC08J3/226C08J2469/00C08J2475/08C08K3/04
Inventor 林文丹李刚张占中
Owner 林文丹
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