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High hardness butadiene-acrylonitrile rubber and preparation method thereof

A technology of nitrile rubber and high hardness, applied in the field of high hardness nitrile rubber and its preparation, can solve the problems of difficult to guarantee the processing size, the repairing layer is heated and softened, etc. The effect of oil resistance and low raw material cost

Inactive Publication Date: 2011-07-20
713 RES INST OF CHINA SHIPBUILDING IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the repair layer made of existing nitrile rubber is heated and softened during turning, and the processing size is not easy to guarantee, so a kind of high hardness nitrile rubber is provided

Method used

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  • High hardness butadiene-acrylonitrile rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The formula of masterbatch of the present invention is as follows:

[0019] Raw material name

Actual formula (unit: gram)

weighing tool

NBR3365

Antiager D

30000±100

600±5

platform scale

pallet scale

[0020] Zinc oxide

stearic acid

PVC

Lead phosphite

N550 carbon black

Silica

o-dibutyl ester

Anti-scorch agent CTP

1500±5

300±5

9000±100

300±5

9000±100

10500±100

3000±5

150±5

pallet scale

pallet scale

platform scale

pallet scale

platform scale

platform scale

platform scale

pallet scale

[0021] The masterbatch mixing process is as follows (using K4 internal mixer):

[0022] serial number

Adding order

Speed ​​(rev / min)

time (minutes)

Glue temperature(℃)

1

2

3

4

5

Add raw rubber, polyvinyl chloride and small ingredients ...

Embodiment 2

[0031] Take the raw materials according to the following weight ratio:

[0032] 80kg of nitrile rubber, 1kg of antioxidant, 2kg of zinc oxide, 0.5kg of stearic acid, 20kg of polyvinyl chloride, 0.5kg of lead phosphite, 20kg of carbon black, 25kg of white carbon black, 6kg of o-dibutyl ester, 0.2kg of benzoic acid, Resin 40kg, Accelerator H3kg, Accelerator CZ0.5kg, Sulfur 1kg.

[0033] (1) Mixing of masterbatch: mixing nitrile rubber and polyvinyl chloride with an internal mixer, first wrapping nitrile rubber sheets on rolls, and then adding zinc oxide, after mixing, in a roller temperature of 30 ℃ Under conditions, add polyvinyl chloride, refining for 10 minutes, then add carbon black, white carbon black, o-dibutyl ester, anti-aging agent, stearic acid, lead phosphite, benzoic acid, in the mixing room temperature of 100 ℃ Refining for 1 hour under the same conditions, plasticizing at a constant temperature for 2 hours at 155°C, and then discharging at 150°C to make a masterba...

Embodiment 3

[0036] Take the raw materials according to the following weight ratio:

[0037] 120kg of nitrile rubber, 4kg of antioxidant, 7kg of zinc oxide, 2kg of stearic acid, 40kg of polyvinyl chloride, 2kg of lead phosphite, 40kg of carbon black, 50kg of white carbon black, 12kg of o-dibutyl ester, 1kg of benzoic acid, 60kg of resin, Accelerator H8kg, accelerator CZ3kg, sulfur 4kg.

[0038] (1) Mixing of masterbatch rubber: mixing nitrile rubber and polyvinyl chloride with an internal mixer, first wrapping the nitrile rubber sheet on a roll, and then adding zinc oxide, after mixing, in a roller temperature of 50 ℃ Under conditions, add polyvinyl chloride, refine for 30 minutes, then add carbon black, white carbon black, o-dibutyl ester, anti-aging agent, stearic acid, lead phosphite, benzoic acid, in the mixing room temperature of 110 ℃ Refining for 3 hours under the same conditions, plasticizing at a constant temperature for 4 hours at 170°C, and then discharging at 170°C to make a m...

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Abstract

The invention discloses high hardness butadiene-acrylonitrile rubber, which consists of the following components in part by weight: 80 to 120 parts of butadiene-acrylonitrile rubber, 1 to 4 parts of antiager, 2 to 7 parts of zinc oxide, 0.5 to 2 parts of stearic acid, 20 to 40 parts of polrvinyl chloride, 0.5 to 2 parts of lead phosphite, 20 to 40 parts of carbon black, 25 to 50 parts of white carbon black, 6 to 12 parts of o-dibutyl ester, 0.2 to 1 part of benzoic acid, 40 to 60 parts of resin, 3 to 8 parts of promoter H, 0.5 to 3 parts of promoter CZ, and 1 to 4 parts of sulfur. The prepared butadiene-acrylonitrile rubber has the hardness of 65+ / -5 (Shore hardness), the elongationatbreak of over 120 percent and the modulus of compression of 60MPa; and bumping adaptor maintaining and fitting layers prepared from the high hardness butadiene-acrylonitrile rubber have the properties of high hardness and high modulus, can meet turning accuracy requirement and high modulus requirement, also meet the requirements on rigidity and marine service environment, have been applied to bumping adaptor products, and can meet operating requirement through property inspection.

Description

technical field [0001] The invention relates to a high-hardness nitrile rubber and a preparation method thereof. Background technique [0002] The missile launching device is between the missile and the launching tube, and the shock absorbing adapter is used to compensate the radial gap between the missile and the launching tube, and the shock absorbing adapter provides lateral shock absorption and guidance for the missile in the tube at the same time. Due to the large deviation of the diameter of the projectile, the adapter needs to be designed with a repair layer. According to the specific projectile diameter, the repair layer is turned to meet the size adaptation requirements. At the same time, the repair layer is a part of the shock-absorbing adapter and has rigidity. Require. [0003] Nitrile rubber is produced by emulsion polymerization of butadiene and acrylonitrile. It has excellent oil and water resistance, high wear resistance, good aging resistance, and strong ad...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08K13/02
Inventor 吴明晨闫炜余文辉李晓强王岚
Owner 713 RES INST OF CHINA SHIPBUILDING IND CORP
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