Super-thick soft rubber and preparation method thereof

A soft and rubber technology, applied in the rubber industry, can solve the problems of decreased dimensional stability, poor dimensional stability of one-time molding, etc., and achieve the effect of maintaining stability and accuracy, and not easily deformed

Inactive Publication Date: 2010-12-08
SHANGHAI GUIGANG RUBBER PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current rubber lining is usually laminated layer by layer with a 3mm thick rubber sheet as the base. Molding dimensional stability is poor, and as the thickness increases, the dimensional stability decreases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Masticate 20kg of natural rubber 1# in 1 and 2 stages to increase its plasticity to 0.6-0.65; then put it into the open mill for repeated rubber breaking and extrusion, and add in steps:

[0054] (1) 2kg carbon black N330, 2kg talcum powder, 7kg barium sulfate

[0055] (2) 0.2kg N-phenyl-α-naphthylamine (antiaging agent A), 0.2kg N-isopropyl-N'-phenyl-p-phenylenediamine (antiaging agent 4010NA)

[0056] (3) 0.4kg stearic acid, 0.4kg paraffin 58#, 0.5kg magnesium oxide, 0.4kg solid coumarone (add after crushing)

[0057] (4) 0.8kg dibutyl sebacate, 0.3kg pine tar, 1.2kg zinc oxide

[0058] (5) 0.4kg sulfur, 0.15kg Accelerator D

[0059] Add the above raw materials, mix them well, make 5-6 triangular bags, and stretch them 8 times to make the rubber material fully uniform, and then release the film according to the requirements; put the film into a special rubber extruder, and extrude to obtain a thickness of 3- 4mm glue board.

[0060] The rubber sheet is formed and ...

Embodiment 2

[0062] Masticate 20kg of natural rubber 1# in 1 and 2 stages to increase its plasticity to 0.6-0.65; then put it into the open mill repeatedly for rubber breaking and extrusion, and add in steps:

[0063] (1) 3kg carbon black N330, 1kg talcum powder, 4kg barium sulfate

[0064](2) 0.2kg N-phenyl-α-naphthylamine (antiaging agent A), 0.8kg N-isopropyl-N'-phenyl-p-phenylenediamine (antiaging agent 4010NA)

[0065] (3) 0.8kg stearic acid, 0.2kg paraffin 58#, 1kg magnesium oxide, 0.2kg solid coumarone (add after crushing)

[0066] (4) 0.8kg dibutyl sebacate, 0.4kg pine tar, 0.8kg zinc oxide

[0067] (5) 0.6kg sulfur, 0.4kg Accelerator D

[0068] Add the above raw materials, mix them well, make 5-6 triangular bags, and stretch them 10 times to make the rubber material fully uniform, and then release the film according to the requirements, put the film into a special rubber extruder, and extrude to obtain a thickness of 3- 4mm glue board.

[0069] Molding and vulcanization proces...

Embodiment 3

[0071] Mold 20kg of natural rubber 1# into 1 and 2 stages to increase its plasticity to 0.6-0.65; then put it into the open mill repeatedly for rubber breaking and extrusion, and add in steps:

[0072] (1) 2kg carbon black N330, 2kg talcum powder, 4kg barium sulfate

[0073] (2) 0.4kg N-phenyl-α-naphthylamine (antiaging agent A), 0.4kg N-isopropyl-N'-phenyl-p-phenylenediamine (antiaging agent 4010NA)

[0074] (3) 0.2kg stearic acid, 0.8kg paraffin 58#, 0.6kg magnesium oxide, 0.6kg solid coumarone (add after crushing)

[0075] (4) 2kg dibutyl sebacate, 0.6kg pine tar, 0.8kg zinc oxide

[0076] (5) 0.8kg sulfur, 0.2kg Accelerator D

[0077] Add the above raw materials separately, mix them well, make 5-6 triangular bags, and stretch them 8 times to make the rubber material fully uniform. -4mm glue board.

[0078] Molding and vulcanization process are the same as embodiment 1.

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Abstract

The invention relates to the field of rubber industry and discloses super-thick soft rubber and the preparation method thereof. The super-thick soft rubber comprises the following components by weight portion: 100 portions of natural rubber 1#, 5-40 portions of carbon black N33, 1-4 portions of stearic acid, 0.75-2.5 portions of N-phenyl-alpha-naphthylamine, 1-4 portions of N-isopropyl-N'-steephenyl-para-phenylene diamine, 1-4 portions of paraffin 58#, 5-40 portions of talcum powder, 1.5-5 portions of brenstone, 2.5-7 portions of magnesium oxide, 4-11 portions of zinc oxide, 0.75-2.5 portions of accelerating agent D, 1-4 portions of solid coumarone, 10-60 portions of barium sulfate, 4-12 portions of dibutyl sebacate and 1.5-4 portions of pine tar. The preparation method comprises the following steps: plasticating the natural rubber 1# until the plasticity of the natural rubber 1# ranges from 0.6 to 0.65, adding other materials, mixing, forming rubber sheets, and molding and vulcanizing the rubber sheets, wherein . The assisting step of partial qualitative die clamping is carried out before vulcanization so as to obtain the super-thick soft rubber through one-step stable molding. The product is not easily deformed during vulcanization and can still maintain the dimensional stability and accuracy in the molding process.

Description

technical field [0001] The invention relates to the field of rubber industry, in particular to an ultra-thick soft rubber and its preparation. Background technique [0002] Anti-corrosion linings are generally used in project equipment such as environmental desulfurization devices, mining machinery mills, and belt conveyors. [0003] Commonly used lining materials are epoxy resin, metal or rubber. Due to its good performance and reasonable cost performance, rubber lining has a broad application prospect. [0004] With the improvement of environmental protection requirements, the demand for such equipment is increasing, and the requirements for the rubber lining used are also increasing. Now the main performance requirements of the rubber lining are soft (GB / T18241.2-2000 rubber lining part 2, Shore A 65±5 hardness; and now the customer’s product requirements are 40±5), super thick (usually the customer The demand is 30-80mm, while other products usually do not exceed 20mm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08K13/02B29C35/04
Inventor 朱文安张承忠葛龙根周云
Owner SHANGHAI GUIGANG RUBBER PRODS
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