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Reverse feeding one-step mixing preparation method of chloroprene mixing rubber

A technology for mixing rubber and rubber raw materials, which is applied in the field of preparation of chloroprene mixing rubber, can solve problems such as uneven mixing, uneven dispersion, and uneven quality, and achieves improved processing safety, lower degumming temperature, Effect of improving kneading efficiency

Inactive Publication Date: 2011-12-07
NINGBO JIEBAO GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the two-step mixing method is that the mixing time is long, the efficiency is low, and there will be problems of uneven mixing and poor quality of the mixed rubber due to the adhesion of the vulcanizing agent to the roller of the rubber mixer; the one-step mixing method of forward feeding In order to complete the mixing of raw rubber, carbon black, filler, oil and other additives, and then add the vulcanizing agent to continue mixing, that is, add the vulcanizing agent to the completed rubber compound and continue mixing The disadvantage of this method is that due to the short addition time of the vulcanizing agent, the mixing is insufficient and the dispersion is uneven, and the prolonging of the mixing time of the vulcanizing agent will cause the rubber to face the hidden danger of scorching, and the total mixing time is also short. long; therefore, the prior art has the problems and deficiencies of time-consuming, labor-intensive, low efficiency, high cost, and uneven quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Name: Type A neoprene compound rubber material

[0029] Formula: formula unit is percentage by weight;

[0030] Rubber raw material: Neoprene, 64%;

[0031] Active agent: stearic acid, 0.4%;

[0032] Antiaging agent: p-phenylenediamine, 0.7%;

[0033] Vulcanizing agent: light magnesium oxide, 2%; zinc oxide, 2.2%;

[0034] Lubricants: paraffin, 0.6%; low molecular weight polyethylene, 1.5%;

[0035] Reinforcing agent: quick extruded carbon black, 10%; semi-reinforcing carbon black, 10%;

[0036] Plasticizer: dioctyl phthalate, 7%;

[0037] Accelerator: tetramethylthiuram disulfide, 0.3%; 1,2-ethylenethiourea, 0.3%;

[0038] Filler: light calcium carbonate, 1%;

[0039] preparation:

[0040] Preparation conditions, equipment

[0041] Ambient air pressure: one atmosphere;

[0042] Ambient temperature: room temperature;

[0043] Preparation equipment: open mill at 16 o'clock, 90L pressurized internal mixer;

[0044] Preparation process: mixing;

[0045] 1. Int...

Embodiment 2

[0051] Name: Type B neoprene compound rubber material

[0052] Formula: formula unit is percentage by weight;

[0053] Rubber raw material: Neoprene, 34%;

[0054] Active agent: stearic acid, 0.8%;

[0055] Antiaging agent: p-phenylenediamine, 1%;

[0056] Vulcanizing agent: light magnesium oxide, 2.5%; zinc oxide, 3%;

[0057] Lubricants: paraffin, 1%; low molecular weight polyethylene, 1.7%;

[0058] Reinforcing agent: quick extruded carbon black, 20%; semi-reinforced carbon black, 15%;

[0059] Plasticizer: dioctyl phthalate, 10%;

[0060] Accelerator: tetramethylthiuram disulfide, 0.5%; 1,2-ethylenethiourea, 0.5%;

[0061] Filler: light calcium carbonate, 10%;

[0062] preparation:

[0063] Preparation conditions, equipment

[0064] Ambient air pressure: one atmosphere;

[0065] Ambient temperature: room temperature;

[0066] Preparation equipment: open mill at 16 o'clock, 90L pressurized internal mixer;

[0067] Preparation process: mixing;

[0068] 1. Intern...

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PUM

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Abstract

The invention discloses a chloroprene mixing rubber preparation method through a backward feed one-step mixing, and a formula and a preparation technology thereof. A technical scheme of one-step mixing is employed in the invention by simultaneously adding a vulcanizing agent, chloroprene rubber and other cooperative auxiliaries into an internal mixer for mixing, so as to overcome problems and insufficiencies of prior art, such as waste of time and labor, low efficiency, high costs and uneven quality. According to the chloroprene mixing rubber preparation method through the backward feed one-step mixing provided by the invention, purposes of reducing mixing time, increasing mixing efficiency, lowering man-hour cost and raising quality of mixing rubber in the mixing preparation of the chloroprene mixing rubber are realized through the backward feed one-step mixing.

Description

technical field [0001] The invention relates to a preparation method of chloroprene mixing rubber, in particular to a reverse feeding one-step mixing preparation method of chloroprene mixing rubber used for mixing and preparing chloroprene mixing rubber. Background technique [0002] Due to its special vulcanization system (metal oxide vulcanization), chloroprene rubber has low vulcanization temperature, is easy to scorch, and is easy to stick to rolls at high temperatures, so its mixing preparation process is difficult to control compared with other rubber materials. The chloroprene mixing rubber in the prior art adopts two-step mixing and one-step forward feeding mixing, wherein, the two-step mixing is as follows: first, raw rubber, carbon black, filler, oil and other additives are mixed to produce Make masterbatch, put it aside for a period of time and then do the second mixing to add vulcanizing agent. The disadvantage of the two-step mixing method is that the mixing ti...

Claims

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Application Information

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IPC IPC(8): C08L11/00C08K13/02C08K5/09C08K5/18C08K3/22C08K3/04C08K5/12C08K5/40C08K5/405C08K3/26B29B7/24B29B7/28B29B7/72
Inventor 陆兴宝朱来军
Owner NINGBO JIEBAO GROUP CO LTD
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