Environment-friendly flame-retardant rubber for shoe soles and preparation method thereof

Abstract

The invention discloses an environment-friendly flame-retardant rubber for shoe soles and a preparation method thereof. The environment-friendly flame-retardant rubber for shoe soles comprises the following components in parts by weight: 55-65 parts of 2# standard rubber, 8-12 parts of styrene-butadiene rubber, 25-35 parts of cis-1,4-polybutadiene rubber, 1-3 parts of sulfur, 2-4 parts of accelerator, 1-3 parts of stearic acid, 4-6 parts of nano zinc oxide, 0.5-0.7 part of releasing agent, 54-66 parts of reinforcing filler, 15-21 parts of softening system, 18-22 parts of red phosphorus, 4-6 parts of nitrogen-based flame retardant MCA (melamine cyanurate) and 18-22 parts of nitrogen-phosphorus flame retardant. In the invention, the natural rubber, styrene-butadiene rubber and cis-1,4-polybutadiene rubber are used as the main materials, the reinforcing filler and softening system are added to ensure the physical properties of the rubber, thereby ensuring the service life of the rubber sole, and the red phosphorus, nitrogen-based flame retardant MCA and nitrogen-phosphorus composite flame retardant NPR (nitrogen and phosphorus retardant) are together used as a flame retardant system, thereby providing excellent flame retardancy for the product. The invention has the advantages of simple method, low cost and favorable use effect.

Description

technical field [0001] The invention relates to a rubber and a preparation method thereof, in particular to a shoe sole rubber and a preparation method thereof. Background technique [0002] At present, flame retardant rubber is usually used in the system: the original flame retardant rubber often uses neoprene as the main material, adding decabromodiphenyl ether and antimony trioxide, chlorinated paraffin, phosphate ester and other materials or filling a large amount of aluminum hydroxide Flame retardant. The disadvantages are (1) chloroprene rubber, decabromodiphenyl ether, antimony trioxide, chlorinated paraffin and other materials are used for flame retardancy. Although the flame resistance is high, a large amount of toxic gases are produced in high-temperature environments such as combustion. Harmful to the human body, and the performance of the rubber material is poor, the stability is low, and the production cost is high. (2) The flame retardant scheme of adding alu...

AI Technical Summary

Problems solved by technology

The disadvantages are (1) chloroprene rubber, decabromodiphenyl ether, antimony trioxide, chlorinated paraffin and other materials are used for flame retardancy. Although the flame resistance is high, a large amount of toxic gases are produced in high-temperature environments such as combustion. Harmful to the human body, at the same time, the performance of the rubber process is not good, the stability is low, and the production cost is high

(2) The flame retardant scheme of adding aluminum hydroxide to chloroprene rubber, in addition to the poor flame retardant effect (oxygen index 18-20), due to the need to fill a large amount of aluminum hydroxide, the physical properties of the rubber are poor, and the tensile properties of the vulcanized rubber Low strength (usually below 8.5MPa), low elongation (usually not more than 350%), low wear resistance (usually more than 1.2cm3 / 1.61km), rubber shoes are not durable, there are many three wastes, and they are not environmentally friendly

Due to the use of inorganic additives or inorganic fillers for the flame retardancy of the system, the physical properties are low, the use value is small, and the application range is low