Environmental protective recovered composition of second-class material of retardant PC/ABS

Abstract

This invention discloses an environmentally friendly flame-retardant composition of recovered PC / ABS waste material. The composition is composed of: PC / ABS waste material 40-70 parts, PC / ABS raw material 20-65 parts, epoxy resin 1-3 parts, bromopolycarbonate 2-5 parts, and acrylate impact modifier 2-5 parts. This invention blends PC / ABS waste material and raw material, and utilizes modification by epoxy resin, bromopolycarbonate and acrylate impact modifier to achieve largely improved mechanical performance and flame retardancy of modified recovered PC / ABS waste material. Therefore, recovered PC / ABS waste material can be effectively utilized, and is environmentally friendly.

Description

technical field [0001] The invention relates to a modified composition of engineering plastics, in particular to a composition for modifying and recycling flame-retardant PC / ABS secondary materials so as to improve various properties of PC / ABS secondary materials for recycling. Background technique [0002] The full name of PC / ABS is polycarbonate / ABS resin polymer blend material, the full name of PC is polycarbonate (Polycarbonate), and the full name of ABS is acrylonitrile-butadiene-propylene-styrene copolymer (Acrylonitrile-butadiene-styrene) . PC / ABS is an important engineering plastic alloy, and it is also one of the commercialized polymer alloys with the largest sales volume in the world, and new PC / ABS varieties have been introduced continuously, such as flame retardant, glass fiber reinforced, electroplating, resistant UV and other varieties. [0003] Engineering plastic waste includes dross or shredded flash, runners, molten slag and non-polluting waste parts, etc...

AI Technical Summary

Problems solved by technology

[0005] The first is to use incineration or landfill, but this method is not only uneconomical but also causes environmental pollution, such as: incineration will produce harmful gases such as sulfur dioxide, which is the main cause of acid rain; , PC / ABS is not easy to degrade, which also causes great harm to the environment

However, the use of secondary materials in the industry is mainly for environmental protection and cost saving. This method obviously has great disadvantages

[0006] The second method is to simply recycle and pump PC / ABS secondary materials without any modification, and downgrade them to ordinary plastics. Although this method is better than the first method, it still fails to make full use of PC / ABS the value of

However, in this method, the secondary material is crushed into smaller materials and then mixed with new pure material. Since the secondary material has been subjected to multiple high-temperature treatments during the molding process to produce segment bonds, its molecular weight will be lower than that of the new material. , generally speaking, the composite synthetic average molecular weight of the new material is lower than 100%, so if there is no good formula to change the blending mechanical properties and flame retardancy, the safety performance of the modified recycled material will be greatly reduced, that is to say, this This method can only be used in occasions that do not require high mechanical properties and precision of materials; moreover, after adding acid anhydride, it will corrode the molding equipment and molds and reduce the service life of the equipment

[0008] In summary, the above-mentioned existing methods all have their own disadvantages and shortcomings, which cause trouble and inconvenience when used, and need to be improved.