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Cold-resistant flame-retardant covering layer and preparation method thereof

A cover layer, cold-resistant technology, applied in the field of conveyor belts, can solve the problems of unconsidered flame-retardant conveyor belts, breakage, poor low temperature performance, etc.

Inactive Publication Date: 2015-05-06
BAODING HUAYUE RUBBER BELTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above-mentioned flame-retardant rubber materials have moderate mechanical properties and flame-retardant properties, their low-temperature performance is poor, and the consequences of running the flame-retardant conveyor belt under extreme cold conditions have not been considered. Conveyor belt products have cracks and fractures in the covering layer during use, which seriously affects the service life of the conveyor belt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] Correspondingly, the present invention also provides a method for preparing the above-mentioned cold-resistant and flame-retardant covering layer, comprising the following steps: step a) mixing 50-70 parts by weight of butadiene rubber BR9000, 20-30 parts by weight of natural rubber and 20-30 parts by weight of The chloroprene rubber is mixed in the internal mixer, the rotor speed of the internal mixer is 30~35r / min, and the pressure is 0.3~0.5MPa; step b) adds 30~50 parts by weight of carbon black, 10 ~15 parts by weight of antimony trioxide, 5~10 parts by weight of chlorinated paraffin, 8~15 parts by weight of ammonium polyphosphate, 5~10 parts by weight of flame retardant softener, 1~2 parts by weight of stearic acid and 1.5~3 parts by weight step c) press the rubber obtained in step b) into a film, and dry; step d) dry the film, 1.9~2.6 parts by weight of vulcanizing agent, 1.2~2 parts by weight The vulcanization accelerator, 3~6 parts by weight of zinc oxide and 1~2 ...

Embodiment 1

[0045] 50 parts by weight of butadiene rubber BR9000, 25 parts by weight of natural rubber, 25 parts by weight of neoprene rubber, 40 parts by weight of carbon black N330, 12 parts by weight of antimony trioxide, 8 parts by weight of chlorinated paraffin, 10 parts by weight of ammonium polyphosphate APP , 6 parts by weight of triphenyl phosphate, 2.0 parts by weight of vulcanizing agent TMTD, 0.8 parts by weight of vulcanization accelerator CZ, 0.6 parts by weight of DM, 3.5 parts by weight of zinc oxide, 1 part by weight of magnesium oxide, 1 part by weight of stearic acid, antioxidant A 1 part by weight, 1 part by weight of antioxidant D, and 0.5 part by weight of protective paraffin.

[0046] Its preparation method comprises the following steps:

[0047] Master batch production process

[0048] Step 1: The minimum feeding temperature of the internal mixer is not less than 22°C, put the butadiene rubber, natural rubber, and neoprene weighed according to the formula requirem...

Embodiment 2

[0058] 55 parts by weight of butadiene rubber BR9000, 30 parts by weight of natural rubber, 15 parts by weight of neoprene rubber, 35 parts by weight of carbon black N220, 12 parts by weight of antimony trioxide, 8 parts by weight of chlorinated paraffin, 10 parts by weight of ammonium polyphosphate APP , 6 parts by weight of triphenyl phosphate, 2.0 parts by weight of vulcanizing agent TMTD, 0.8 parts by weight of vulcanization accelerator CZ, 0.6 parts by weight of DM, 3.5 parts by weight of zinc oxide, 1 part by weight of magnesium oxide, 1 part by weight of stearic acid, anti-aging agent 0.5 parts by weight of A, 0.5 parts by weight of anti-aging agent D, and 1.0 parts by weight of protective paraffin.

[0059] Its preparation method and steps are the same as in Example 1

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Abstract

The invention provides a cold-resistant flame-retardant covering layer and a preparation method thereof. The cold-resistant flame-retardant covering layer is prepared from the raw materials of cis-polybutadiene rubber BR9000, natural rubber, chloroprene rubber, carbon black, antimony trioxide, chlorinated paraffin, ammonium polyphosphate, a flame-retardant softener, a vulcanizing agent, a vulcanization accelerator, zinc oxide, magnesium oxide, stearic acid, and an anti-aging agent. Compared to prior arts, according to the invention, the cis-polybutadiene rubber BR9000, natural rubber and chloroprene rubber with the properties of high cold flow property and slow vitrification are adopted; and the flame-retardant softener is also adopted, such that rubber crosslink bond softness is improved, and rubber elasticity insufficient of a flame-retardant conveyor belt under dynamic conditions in an alpine region can be made up. Therefore, the flame-retardant covering layer has good flame-retardant property, and also has good mechanical properties under a low temperature condition.

Description

technical field [0001] The invention relates to the technical field of conveyor belts, in particular to a cold-resistant and flame-retardant covering layer and a preparation method thereof. Background technique [0002] The conveyor belt is the main tool for transporting materials on the ground and transporting coal underground in coal mines. The structure of a general conveyor belt includes three main parts: the upper and lower covering layers, the middle skeleton layer, and the adhesive layer between the middle skeleton layer and the covering layer, and the performance of the covering layer rubber is the key to determining the performance of the conveyor belt. Because the traditional rubber conveyor belt is flammable, the material structure strength of the conveyor belt will drop sharply in case of fire and strong radiation, and the components will collapse. The conveyor belt has repeatedly caused major fire accidents and cannot meet the requirements of flame retardancy. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00C08L7/00C08L11/00C08K13/02C08K3/04C08K3/22C08K5/02C08K3/32C08K5/09C08K5/523B29B7/28
CPCC08L9/00B29B7/28B29B7/283B29B7/286C08K2201/014C08L2201/02C08L2205/025C08L2205/035C08L7/00C08L11/00C08L91/06C08K13/02C08K3/04C08K5/523C08K5/09C08K2003/323C08K3/2279
Inventor 李昭钦
Owner BAODING HUAYUE RUBBER BELTS
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