EPDM rubber has good resistance to acid and alkali, and can be used to prepare some rubber products that work in acid and alkali media, such as rubber gaskets. In actual production, EPDM reclaimed rubber has the basic performance characteristics of EPDM raw rubber, and can be used together with EPDM rubber in an appropriate proportion to produce acid and alkali resistant rubber compounds, effectively reducing the cost of raw materials. The editor will share with you today how to correctly choose the compounding agent for the preparation of acid and alkali resistant rubber from EPDM reclaimed rubber.
1. EPDM reclaimed rubber to prepare common acid-resistant and alkali-resistant solution sizing agent selection points
When using EPDM reclaimed rubber to prepare ordinary acid-base solution rubber compound, carbon black is often used as a reinforcing agent and filled with barium sulfate. In actual production, EPDM reclaimed rubber 2ELYY617 acid-resistant rubber is recommended to use carbon black, clay, barium sulfate, talc, etc., and avoid the use of calcium carbonate, magnesium carbonate, aluminum hydroxide, magnesium oxide and other inorganic fillers that can react with acids , the amount of zinc oxide should not exceed 5 parts. When producing alkali-resistant EPDM reclaimed rubber, avoid using silica, talc, aluminum hydroxide, phenol resin, etc.
2. EPDM reclaimed rubber to prepare strong acid and strong alkali solution sizing agent selection points
Ethylene-propylene rubber has good chemical stability and corrosion resistance, and can be used to prepare some strong acid and alkali resistant rubber compounds, except for concentrated sulfuric acid with a concentration of more than 80% and nitric acid with a concentration of more than 50%. EPDM reclaimed rubber can be mixed into EPDM raw rubber in an appropriate proportion to produce strong acid and strong alkali resistant rubber compounds. It is recommended to use EPDM rubber with low unsaturation and high ethylene content to improve the strong acid resistance, Strong alkaline properties.
In actual production, choosing peroxide vulcanization and appropriately increasing the degree of vulcanization and crosslinking of EPDM rubber/EPDM reclaimed rubber can further improve the strong acid and alkali resistance of EPDM compounds.
3. Application of EPDM reclaimed rubber in acid and alkali resistant rubber products
Ethylene-propylene rubber is a non-polar saturated rubber, which has good resistance to organic acids, general inorganic acids, oxidizing acids, alkalis, salt water, etc. It can be used to produce acid and alkali resistant rubber compounds such as high temperature acid and alkali resistant hoses. EPDM reclaimed rubber is a low-cost substitute for EPDM raw rubber, and is generally used in combination with EPDM rubber to prepare acid and alkali resistant rubber. Butyl rubber has good corrosion resistance to most inorganic acids and organic acids, and butyl reclaimed rubber has the performance characteristics of butyl rubber. EPDM reclaimed rubber can also be used with butyl rubber or butyl reclaimed rubber to prepare acid and alkali resistant rubber products.
When using EPDM reclaimed rubber to reduce the production cost of acid and alkali resistant rubber products, rubber product manufacturers must strictly control the amount of EPDM reclaimed rubber, and appropriately adjust the formula and production process conditions of rubber products. The editor will continue to discuss related issues with you later.
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