High-strength laminated fire-retarding conveyer belt coating rubber, and preparation method thereof

A covering layer and conveyor belt technology, which is applied in the field of high-strength laminated flame-retardant conveyor belt covering rubber and its preparation, can solve the problems of incapable of high mechanical properties, poor flexibility, poor toughness and softness, etc. It is difficult to balance mechanical strength and excellent flame retardant performance, improve flexibility and strength, and improve the effect of mechanical strength

Inactive Publication Date: 2012-06-27
WUXI BOTON TECH CO LTD
4 Cites 43 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0004] Although the above-mentioned flame-retardant rubber materials have relatively moderate mechanical properties and flame-retardant properties, especially excellent flame-retardant properties, there are still some problems: polyvinyl chloride is a plastic product, although polyvinyl chloride and nitrile rubber are often blended The covering layer is made of rubber material, but its toughness and softness are still inferior to rubber materials, and the conveyor belt is easy to slip, deviate, and has poor flexibility; neoprene is used as the covering layer rubber material, which has poor processing performance and is easy to stick to the roller. , easy to scorch, and difficult to control the process during pr...
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Abstract

The invention relates to high-strength laminated fire-retarding conveyer belt coating rubber and a preparation method thereof. The rubber has both high fire retardance and mechanical strength, and can be used as fire-retarding conveyer belt coating rubber. According to the method, substrate rubber is masticated in a double-roll open mill; stearic acid, an anti-aging agent, a fire retardant, metal oxide, a reinforcing agent, a vulcanization accelerator and a vulcanizing agent are added to the substrate sequentially; the mixture is uniformly mixed in the open mill, such that coating gum is obtained; the coating gum and a bonding layer are vulcanized on a molding vulcanization plate, such that a high-strength laminated fire-retarding conveyer belt coating rubber product is obtained. According to the invention, styrene butadiene rubber, natural rubber, cis-1,4-polybutadiene rubber or a mixture of the three is adopted as the substrate rubber. Compared to a traditional coating material, mechanical strength, flexibility and processing property of the coating rubber are improved, and cost is reduced.

Application Domain

Conveyors

Technology Topic

Butadiene-styrene rubberOxide +12

Image

  • High-strength laminated fire-retarding conveyer belt coating rubber, and preparation method thereof

Examples

  • Experimental program(5)
  • Comparison scheme(2)

Example Embodiment

[0032] Example 1
[0033] Add 500g styrene-butadiene rubber (commercially available SBR1502) to the double-cylinder mill for mastication, and then add metal oxides: 15g nano-zinc oxide, 10g nano-magnesium oxide and 5g stearic acid, antioxidant: 2, 2, 4 -Trimethyl-1,2-dihydroquinoline polymer (RD) 5g, N-phenyl-N′-yl-p-phenylenediamine (4010NA) 10g, flame retardant: chlorinated paraffin 150g, two trioxide Antimony 40g and zinc borate 40g, reinforcing agent: surface-modified silica 250g, nano-magnesium hydroxide 100g, finally add vulcanization accelerator 2-thiol benzothiazole (M) 10g, N-tert-butyl-2 -Benzothiazole sulfenamide (NS) 5g and N-cyclohexyl-2-benzothiazolyl sulfenamide (CZ) 5g, sulfur 10g as vulcanizing agent. Mix uniformly on an open mill to obtain a covering layer adhesive; vulcanize the covering layer adhesive and the adhesive layer on a molding vulcanizing plate at 150°C to obtain the product. The properties are shown in Table 1.
[0034] The high-strength laminated flame-retardant conveyor belt covering rubber composite material prepared in Example 1 has a covering layer in the alcohol blowtorch experiment. The full thickness of the rubber sample burns in the alcohol blowtorch flame for 30s. After the blowtorch is removed, the flame is extinguished; no covering After the full-thickness sample of the layer of rubber is burned in the flame of an alcohol blowtorch for 30 seconds, remove the torch. The average of the total duration of flame and flameless shall not exceed 2s, and any single value shall not exceed 5s.

Example Embodiment

[0035] Example 2
[0036] On the double-roller mill, add 400g styrene butadiene rubber (commercially available SBR1502), 100g butadiene rubber (commercially available BR9000) for mastication, and then add activator metal oxide: 15g nano zinc oxide, 10g nano magnesium oxide and hard Fatty acid 5g, antioxidant: 2,2,4-trimethyl-1,2-dihydroquinoline polymer (RD) 5g, N-phenyl-N′-yl-p-phenylenediamine (4010NA) 10g, Flame retardant: 140g of chlorinated paraffin, 50g of antimony trioxide and 60g of zinc borate, reinforcing agent: 275g of surface-modified silica, 125g of nano-magnesium hydroxide, and finally add vulcanization accelerator 2-thiol benzothiazole (M) 10g, 5g of N-tert-butyl-2-benzothiazolyl sulfenamide (NS) and 5g of N-cyclohexyl-2-benzothiazolyl sulfenamide (CZ), sulfur 10g as vulcanizing agent. Mix uniformly on an open mill to obtain a covering layer adhesive, and then vulcanize the covering layer adhesive and the adhesive layer on a molding vulcanizing plate at 150°C to obtain a flame-retardant conveyor belt. The properties are shown in Table 1.

Example Embodiment

[0037] Example 3
[0038] Add 300g styrene-butadiene rubber (commercially available SBR1502) and 200g natural rubber (commercially available natural rubber 10#) on the double-cylinder mill for mastication, and then add activator metal oxide: 20g nano zinc oxide, 5g nano magnesium oxide And stearic acid 5g, anti-aging agent: 2-mercaptobenzimidazole (MB) 5g, N-phenyl-N′-yl-p-phenylenediamine (4010NA) 10g, flame retardant: chlorinated paraffin 100g, two trioxide Antimony 60g and zinc borate 75g, reinforcing agent: surface-modified silica 275g, nano calcium carbonate 150g, finally add vulcanization accelerator 2-mercaptobenzothiazole (M) 5g, tetramethylthiuram disulfide (TMTD) 5g and N-cyclohexyl-2-benzothiazolyl sulfenamide (CZ) 5g, the vulcanizing agent is sulfur 10g. Mix uniformly on an open mill to obtain a covering layer adhesive, and then vulcanize the covering layer adhesive and the adhesive layer on a molding vulcanizing plate at 150°C to obtain a flame-retardant conveyor belt. The properties are shown in Table 1.
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PUM

PropertyMeasurementUnit
Tensile strength17.0mPa
Tensile strength>= 22.0mPa
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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