Low-L value inflaming retarding ABS modified resin and preparation method thereof

Abstract

The invention relates to a low-L value (less than 27) inflaming retarding ABS modified resin and a preparation method thereof. The resin comprises the components with the content (based on parts by weight): 100 parts of ABS resin, 10-25 parts of brominated flame retardant, 20-40 parts of inorganic inflaming retarding master batch, 0.1-0.5 part of anti-dripping agent, 0.2-1 part of antioxidant, 0.1-0.5 part of light stabilizer, 1-3 parts of lubricating agent and 1-4 parts of black master batch. Compared with the prior art, the invention has reasonable technique, overcomes the defect of high L value (namely, low degree of blackness) of the existing inflaming retarding ABS resin, and adopts the novel high-efficiency inflaming retarding synergistic effect technology. The invention leads the resin has higher degree of blackness by reasonably selecting the grain diameter of antimony trioxide, a carbon black lubricating dispersion system and the processing technique of a master batch method on the basis of maintaining the excellent performance of the inflaming retarding ABS resin, and has wide application prospect in the field of the requirement of high degree of blackness.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a flame-retardant ABS modified resin with a low L value and a preparation method thereof. Background technique [0002] Acrylonitrile-butadiene-styrene copolymer resin (ABS), has excellent comprehensive properties such as high impact strength, high heat resistance and low temperature resistance, chemical corrosion resistance, electrical insulation performance, etc., and has excellent processing performance and electroplating performance And high-gloss appearance, it is one of the engineering plastics with the largest amount and widest application. It is widely used in electronic equipment, communication equipment, automobile industry, household appliances, office equipment, electrical products and other fields. [0003] However, the oxygen index of ABS resin is only 18.3-20, which is a flammable polymer material. When it is used in various electronic and electrical prod...

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Problems solved by technology

Antimony trioxide, commonly known as "antimony white", has a refractive index of 2.1, so it has a strong hiding power; and the addition of a large amount of brominated flame retardants will also affect the background color of flame-retardant ABS. Therefore, the black color of flame-retardant ABS The blackness is usually relatively low (the L value is an index to measure the blackness, the lower the value, the higher the blackness), and the panels and parts with higher blackness requirements cannot meet the use requirements.

For example, when low-cost flame-retardant ABS replaces black flame-retardant PC / ABS, the appearance parts cannot meet the requirements because the blackness is too low and the L value is too high.

[0005] At present, the direct and effective way to increase the blackness of flame-retardant ABS is to increase the amount of black masterbatch, but when the black masterbatch is added to a certain content, the contribution to the reduction of the L value is not obvious, and the addition of a large amount of carbon black will cause serious problems. Affect the physical properties of flame retardant ABS, increase the risk of flame retardant ABS smoldering, promote the migration and blooming of wax dispersants in masterbatches, and also greatly increase the cost of flame retardant ABS

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