Environment-friendly and oil-resistant rubber for sealing

An oil-resistant rubber and sealing technology, applied in the rubber field, can solve the problems of human health hazards, short service life, ozone cracking, etc., and achieve the effects of vulcanization pollution resistance, high wear resistance and promoting melting effect

Inactive Publication Date: 2017-11-17
四川省蓝扬科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance indicators of most of the existing oil-resistant rubber materials are only meeting the basic requirements of national standards. For many special oily environments, the performance of the current oil-resistant rubber materials cannot reliably meet the needs of long-term use under oily conditions. Oil-resistant rubber The oil resistance of the material needs to be further optimized and improved
[0003] Moreover, at present, the rubber material used for sealing rubber products in my country is mainly nitrile rubber, and its sealing performance is commonly used in transformer seals. Nitrile rubber has excellent oil resistance, good low temperature performance, heat resistance and low cost. However, due to the good ozone resistance of nitrile rubber, especially in the case of large stress, the ozone cracks very quickly, so the service life of the electric porcelain bushing seal of the transformer is short
In addition, the existing oil-resistant rubber sheathed cables, oil-resistant rubber plugs, oil-resistant rubber films and oil-resistant rubber tubes all have quite serious pollution, which will cause certain harm to human health. Oil-resistant rubber modified materials are also particularly important

Method used

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  • Environment-friendly and oil-resistant rubber for sealing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of environment-friendly oil-resistant rubber for sealing in this embodiment is made of the following raw materials in parts by mass: nitrile rubber 50-70, stabilizer 8-15, modified chloroprene rubber 20-50, carbon black 20- 30, polystyrene 8-12, vulcanizing agent 1-1.5, additive 15-20, stearic acid 3-4, zinc oxide 5-10, magnesium oxide 12-18, antioxidant 10-14, paraffin 10-20;

[0031] Its preparation method comprises the following steps:

[0032] Step S1: Weigh nitrile rubber, stabilizer, zinc oxide, magnesium oxide, stearic acid, paraffin, and polystyrene according to the weight parts of the raw materials and mix them, put the mixed raw materials in a high-speed blender, and Stir at 100-140°C for 15-25 minutes;

[0033] Step S2: Thin pass 10 times, then add anti-aging agent and 1 / 2 part of carbon black in raw materials for mixing;

[0034] Step S3: thin pass 10 times, then add modified chloroprene rubber, additives, and carbon black in the remaining amount of...

Embodiment 2

[0039] This embodiment is further optimized on the basis of embodiment 1, and the anti-aging agent is CTU anti-aging agent. As shown in Table 1: Change parameters of CTU antioxidant under normal conditions and after aging in hot air at 100°C×24h.

[0040]

[0041] Table 1

[0042] Analyzing the data in Table 1, in terms of tensile strength and elongation at break, the value of CTU rubber compound containing antioxidant is equivalent to that of MB rubber compound containing antioxidant, and higher than that of rubber compound containing other antioxidants used in the test. The chemical name of anti-aging agent MB is 2-mercaptobenzimidazole, and its structure contains double bonds. During the vulcanization process, MB reacts chemically with rubber, and is chemically bonded in the rubber macromolecular network, so that the rubber compound exhibits Good tensile properties. The structure of anti-aging agent CTU also contains carbon-sulfur double bonds, showing performance simi...

Embodiment 3

[0045] This embodiment is further optimized on the basis of Example 2. The stabilizer is composed of 40-50 calcium stearate, 20-25 zinc stearate, and 30-60 B diketone in parts by weight. Phosphite 40-70, antioxidant 10-15, hydrotalcite 5-8, OPE15-20, EBS10-20 composition.

[0046] The stabilizer obtained according to this formula has good dispersibility, compatibility, processing fluidity, wide adaptability, and excellent surface finish of the product; excellent thermal stability, small initial hue, and no precipitation; does not contain heavy metals and other toxic substances Composition, no vulcanization phenomenon; Congo red has a long test time, excellent electrical insulation, no impurities, and high-efficiency weather resistance; wide application range, strong practicability, less dosage, and multi-functionality; in white products, white better than its similar products. It not only has good compatibility and viscosity control, but also can provide good initial coloring...

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Abstract

The invention discloses environment-friendly and oil-resistant rubber for sealing. The rubber is prepared from raw materials in parts by mass as follows: 50-70 parts of nitrile rubber, 8-15 parts of a stabilizer, 20-50 parts of modified chloroprene rubber, 20-30 parts of carbon black, 8-12 parts of polystyrene, 1-1.5 parts of a vulcanizing agent, 15-20 parts of an additive, 3-4 parts of stearic acid, 5-10 parts of zinc oxide, 12-18 parts of magnesium oxide, 10-14 parts of an anti-ageing agent, 20-30 parts of paraffin and 4-5 parts of an aid. In combination with the characteristics of nitrile rubber and modified chloroprene rubber, the rubber not only has the characteristics of good oil resistance, higher wear resistance and better heat resistance, but also has high initial adhesive force and bonding strength, flexible adhesive layer, good elasticity, impact resistance and vibration resistance; the proportion of the vulcanizing agent is reduced, so that environmental protection and no pollution are realized; the additive prepared from cyanate ester resin, acrylic resin, sodium tripolyphosphate and kaolin in a specific ratio is added, and accordingly, the air tightness of the rubber is improved.

Description

technical field [0001] The invention relates to the field of rubber, in particular to an environment-friendly and oil-resistant rubber for sealing. Background technique [0002] Nitrile rubber (NBR) is obtained by emulsion polymerization of two monomers, butadiene and acrylonitrile. Because its molecular chain contains unsaturated double bonds and polar groups -CN, it has good oil resistance and physical Excellent mechanical properties and other characteristics, has been widely used in various oil-resistant rubber materials. The performance indicators of most of the existing oil-resistant rubber materials are only meeting the basic requirements of national standards. For many special oily environments, the performance of the current oil-resistant rubber materials cannot reliably meet the needs of long-term use under oily conditions. Oil-resistant rubber The oil resistance of the material needs to be further optimized and improved. [0003] Moreover, at present, the rubber ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L15/00C08L79/04C08L33/00C08L25/06C08K13/02C08K3/04C08K5/09C08K5/098C08K3/26C08K3/34C08F236/12C08F220/44C09K3/10
CPCC08L9/02C08F236/12C08K2201/014C08L2201/02C08L2201/08C08L2201/14C08L2205/035C09K3/10C09K2003/1078C08L15/00C08L79/04C08L33/00C08L25/06C08K13/02C08K3/04C08K5/09C08K5/098C08K3/26C08K3/346C08F220/44
Inventor 王旭东
Owner 四川省蓝扬科技有限公司
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