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Nitrile rubber buna (NBR) low-temperature cold-resistant sealing element and preparation method thereof

A technology of nitrile rubber and seals, which is applied in the field of seals and their preparation, can solve the problems of poor low temperature resistance and cold resistance, and achieve the effect of improving the application and meeting the use requirements

Inactive Publication Date: 2018-02-13
宁波市大器密封科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a nitrile rubber (NBR) low-temperature and cold-resistant seal and its preparation method, which has the advantages of low-temperature and cold-resistant, and solves the problem of poor low-temperature and cold-resistant effect of the existing NBR seals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A nitrile rubber (NBR) low-temperature cold-resistant seal and its preparation method. The mass parts of each raw material component are as follows: 70 parts of nitrile rubber; 10 parts of butadiene rubber; 3 parts of zinc oxide; stearic acid (SA) 0.5 parts; antioxidant (MB) 0.5 parts; antioxidant (RD) 0.5 parts; N-550 carbon black 10 parts; N-774 carbon black 30 parts; softener (TP-95) 15 parts; accelerator 3.5 parts.

[0035] Make rubber seals according to the above formula as follows:

[0036] (1) Place NBR and Butadiene rubber independently in the open mill for 45 minutes;

[0037] (2) According to the mass parts, each raw material component and the nitrile rubber and butadiene rubber after plasticizing are mixed, filtered and formed to obtain a molded part;

[0038] (3) Place the molded part in the mold at a pressure of 175kgf / cm 2 1. The first vulcanization is carried out at a temperature of 160°C, and the first vulcanization time is 250s;

[0039] (4) Place th...

Embodiment 2

[0043] A nitrile rubber (NBR) low-temperature cold-resistant seal and its preparation method. The mass parts of each raw material component are as follows: 80 parts of nitrile rubber; 20 parts of butadiene rubber; 5 parts of zinc oxide; stearic acid (SA) 1 part; antioxidant (MB) 1 part; antioxidant (RD) 1 part; N-550 carbon black 20 parts; N-774 carbon black 40 parts; softener (TP-95) 22 parts; accelerator 5.5 parts.

[0044] The mass parts of each component of the above accelerator are: 0.5 parts of DM; 0.5 parts of S; 3.5 parts of 40% BIPB; 1 part of 40% auxiliary crosslinking agent (TAIC).

[0045] Make rubber seals according to the above formula as follows:

[0046] (1) Place NBR and Butadiene rubber independently in the open mill for 45 minutes;

[0047] (2) According to the mass parts, each raw material component and the nitrile rubber and butadiene rubber after plasticizing are mixed, filtered and formed to obtain a molded part;

[0048] (3) Put the molding in the mol...

Embodiment 3

[0053] A nitrile rubber (NBR) low-temperature cold-resistant seal and its preparation method. The mass parts of each raw material component are as follows: 90 parts of nitrile rubber; 30 parts of butadiene rubber; 7 parts of zinc oxide; stearic acid (SA) 1.5 parts; antioxidant (MB) 1.5 parts; antioxidant (RD) 1.5 parts; N-550 carbon black 30 parts; N-774 carbon black 50 parts; softener (TP-95) 30 parts; accelerator 7.5 parts.

[0054] Make rubber seals according to the above formula as follows:

[0055] (1) Place NBR and Butadiene rubber independently in the open mill for 45 minutes;

[0056] (2) According to the mass parts, each raw material component and the nitrile rubber and butadiene rubber after plasticizing are mixed, filtered and formed to obtain a molded part;

[0057] (3) Put the molding in the mold at a pressure of 185kgf / cm 2 1. The first vulcanization is carried out at a temperature of 180°C, and the time for the first vulcanization is 290s;

[0058] (4) Place ...

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Abstract

The invention discloses a nitrile rubber buna (NBR) low-temperature cold-resistant sealing element and a preparation method thereof. The nitrile rubber buna low-temperature cold-resistant sealing element is prepared from the following raw material components in parts by mass: 70 to 90 parts of butadiene-acrylonitrile rubber, 10 to 30 parts of butadiene rubber, 3 to 7 parts of zinc oxide, 0.5 to 1.5 parts of stearic acid (SA), 0.5 to 1.5 parts of anti-aging agent (MB), 0.5 to 1.5 parts of anti-aging agent (RD), 10 to 30 parts of N-550 carbon black, 30 to 50 parts of N-774 carbon black, 15 to 30parts of softener (TP-95), and 3.5 to 7.5 parts of accelerant. According to the nitrile rubber buna low-temperature cold-resistant sealing element and the preparation method thereof provided by the invention, through optimizing the matching ratio of the raw material components, the material has the advantage of resistance to low temperature and coldness, and the problem that an existing nitrile rubber buna sealing element is poor in resistance to low temperature and coldness is solved.

Description

technical field [0001] The invention relates to a seal and a preparation method thereof, in particular to a low-temperature cold-resistant seal of nitrile rubber (NBR) and a preparation method thereof. Background technique [0002] Nitrile rubber is a general-purpose oil-resistant rubber, which is widely used in hydraulic and pneumatic systems such as petroleum machinery, vehicles, and engineering machinery. As a seal product, its excellent elastic characteristics are suitable for various oil pressure pipelines. It not only has good oil resistance, odor resistance, wear resistance and chemical corrosion resistance, but also has good compression set and heat resistance. However, NBR has poor low temperature and cold resistance, and its brittle temperature is only around -40°C. If it is used on the ground below -40°C, the sealing function will easily fail due to the loss of elasticity, which will directly affect the use, and its safety and stability will be greatly affected, ...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L9/00C08K13/02C08K3/22C08K5/09C08K3/04
CPCC08L9/02C08K2003/2296C08K2201/014C08L9/00C08K13/02C08K3/22C08K5/09C08K3/04
Inventor 陈伦平
Owner 宁波市大器密封科技有限公司
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