Corrosion-resistant rubber products, that is, a type of rubber products that can resist the erosion of chemical substances, are widely used in pipelines, valves, seals, gaskets, etc. in petroleum, chemical, water treatment and other industries. Butyl rubber has excellent air tightness and chemical resistance, and is one of the ideal raw materials for the production of corrosion-resistant rubber products. In the production of butyl rubber corrosion-resistant products, the appropriate amount of butyl reclaimed rubber can effectively reduce the cost of raw materials; Corrosion-resistant rubber formulations containing butyl reclaimed rubber can be properly optimized to further improve the performance of the finished product.
When butyl reclaimed rubber is used in combination with butyl rubber and ethylene propylene rubber to produce corrosion-resistant rubber products, it is necessary to consider the specific application environment, medium type, working temperature, pressure, mechanical strength and other indicators of the product; When designing the formula, it is necessary to consider factors such as material performance, processing technology and cost to ensure that corrosion-resistant rubber products containing butyl reclaimed rubber can work stably for a long time.
1. Design points of vulcanization system for corrosion-resistant rubber products produced by butyl reclaimed rubber
Both the type of cross-linked bond and the degree of vulcanization can affect the corrosion resistance of rubber. When using butyl reclaimed rubber to produce corrosion-resistant rubber products, the chemical corrosion resistance of butyl vulcanized rubber using resin vulcanization is better than that of quinoxime and sulfur vulcanized rubber. Appropriately improving the vulcanization degree of butyl recycled rubber is an effective means to improve the chemical resistance of vulcanized rubber.
2. Key points of the design of the reinforcement filling system for the production of corrosion-resistant rubber products by butyl reclaimed rubber
When producing corrosion-resistant rubber products with butyl reclaimed rubber, butyl rubber/reclaimed rubber, it is filled with chemically inert filler, vulcanized rubber is not easy to react with chemically corrosive medium, is not easy to be eroded, and does not contain water-soluble E4LYY328 electrolyte impurities. The commonly used reinforcing agents and fillers for corrosion-resistant rubber of butyl reclaimed rubber are carbon black, clay, talc, barium sulfate, diatomaceous earth, etc., among which barium sulfate has the best acid resistance. A small amount of ethylene glycolamine or diethylene glycol can be added to the butyl reclaimed rubber filled with silica to further improve the corrosion resistance of the vulcanized rubber.
3. Key points of design of softening and plasticizing system for the production of corrosion-resistant rubber products by butyl reclaimed rubber
The selection of plasticizers such as plasticizers, low-molecular polymers or alkali-resistant ointments that are not easy to be extracted by chemicals and not easy to interact with chemicals is more beneficial to the corrosion resistance of butyl reclaimed rubber vulcanized rubber.
4. Other system design points for the production of corrosion-resistant rubber products by butyl reclaimed rubber
(1) Choose antioxidants that will not be extracted by chemicals and are not easy to interact with chemicals; (2) Avoid using water-soluble compounding agents; (3) Add 1-2 parts of paraffin wax to butyl reclaimed rubber corrosion-resistant products to form a protective film on the surface of the product, which can avoid direct contact among chemicals and the surface of the rubber compound, and then improve the corrosion resistance of reclaimed rubber products.
When using butyl reclaimed rubber to reduce the production cost of corrosion-resistant rubber products, we must fully consider the use environment and performance requirements of the products, and reasonably design the formula based on factors such as material performance, including vulcanization system, filling system, softening system, anti-aging system, etc., so as to further improve the performance of corrosion-resistant rubber products while reducing costs, meet the performance requirements of different use occasions, and improve economic benefits.
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