Compound inflaming retarding masterbatch and preparation method thereof

Abstract

The invention provides a compound inflaming retarding masterbatch and a preparation method of the compound inflaming retarding masterbatch. The inflaming retarding masterbatch is formed by mixing carrier resin, a compound fire retardant, a lubrication dispersing agent and antioxygen. The method comprises the following steps of: mixing 1,2-Bis(2,3,4,5,6-pentabromophenyl)ethane, antimonous oxide, zinc borate, linear thermoplastic phenolic resin powder, adding a silane coupling agent for mixing to obtain the compound fire retardant; adding the dried carrier resin, the compound fire retardant, the lubrication dispersing agent and the antioxygen in a high-speed mixer for mixing, extruding, prilling and drying to prepare the compound inflaming retarding masterbatch. The diphenylethane decabromide serves as a main fire retardant which contains halogen and does not contain toxin, no poisonous polybrominated dibenzodioxins or polybrominated dibenzofurans are produced during burning, and simultaneously low-price zinc borate partially replaces expensive antimonous oxide, so that the compound inflaming retarding masterbatch has price superiorities, effectively reduces density of smoke obtained during burning simultaneously and restrains drop caused by burning and fusing. Synergistic effects of a compound inflaming retarding system greatly improve inflaming retarding efficiency of the compound inflaming retarding masterbatch.

Description

technical field [0001] The invention relates to a flame-retardant masterbatch and a preparation method thereof, in particular to a compound flame-retardant masterbatch used for plastic addition in the field of polymer materials and a preparation method thereof. Background technique [0002] Flame retardant plastics are modified by adding flame retardants to plastics to improve the performance of flame retardant and fire prevention. However, plastic flame retardants are mostly powder, and the dust will fly during processing, and the operating environment is extremely poor. Moreover, the volume difference between the powder and the granular plastic base material is large, and the density difference is very different, so it is difficult to mix evenly. In addition, extruders and injection molding machines have limited mixing properties along the axis of the material, and equipment vibrations make the powder easily sink and cause the separation of resin pellets, resulting in segr...

AI Technical Summary

Problems solved by technology

[0004] However, products made of such traditional brominated flame retardant masterbatches produce many toxic substances when burned, among which polybrominated dibenzodioxane (DBDO) and polybrominated dibenzofuran (DBDF) not only It affects the normal metabolism of the human body and is carcinogenic. The International Center for Cancer Research has listed it as a first-class human carcinogen

This kind of flame retardant products not only has a high concentration of toxic smoke when burning, but also tends to produce melting droplets, causing the fire to spread, and its environmental protection and market recognition are declining year by year

Traditional brominated flame retardant masterbatches are increasingly rejected by environmentalists. The European Union has implemented the RoHS directive on July 1, 2006, strictly restricting the use of polybrominated diphenyl ethers (PBDE) and polybrominated biphenyls (PBBs).

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