A kind of flame retardant composition for chloroprene rubber and preparation method thereof

Abstract

The invention provides a flame retardant composition for chloroprene rubber and a preparation method thereof, wherein the flame retardant composition comprises antimony trioxide, magnesium borate, zinc aluminate and magnesium carbonate; in parts by weight, The flame retardant composition comprises 10-30 parts of antimony trioxide, 20-50 parts of magnesium borate, 10-40 parts of zinc aluminate and 10-30 parts of magnesium carbonate. With this flame retardant composition, there is no need to add brominated flame retardants (such as decabromodiphenyl ether, decabromodiphenylethane, etc.), halogenated flame retardants (chlorinated paraffin, chlorine, etc.) to the neoprene rubber. Polyethylene), metal hydroxides and zinc borate and other flame retardants. Moreover, the flame retardant composition has the advantages of less dosage and high flame retardant efficiency.

Description

technical field [0001] The invention belongs to the field of rubber flame retardants, and in particular relates to a flame retardant composition for chloroprene rubber and a preparation method thereof. Background technique [0002] Neoprene is a self-reinforcing special rubber that is weather-resistant, oil-resistant, and chemically resistant. It is widely used in rubber products such as cables, conveyor belts, hoses, and seals. Because chloroprene rubber contains chlorine, dehydrochlorination reaction occurs during combustion, and Cl free radicals are formed in the gas phase, which can capture OH free radicals and H free radicals in the flame, thereby playing a flame-retardant role. The flame resistance of neoprene is the best among general-purpose rubbers. However, in order to improve the flame retardant performance, other flame retardants are still needed. Commonly used flame retardants include antimony trioxide, zinc borate, decabromodiphenyl ether, aluminum hydroxide, ...

AI Technical Summary

Problems solved by technology

In addition, compared with reinforcing fillers such as carbon black, the particle size of general flame retardants is relatively coarse, which makes the combination of flame retardants and rubber interfaces relatively poor. Therefore, when the filling amount of flame retardants is larger, the rubber mechanical properties And the negative impact on processing performance will be greater

At the same time, the price of flame retardants is generally higher than that of reinforcing agents such as carbon black and white carbon black. The greater the amount of flame retardants used, the higher the cost of the flame retardant rubber produced.

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