Rubber waterproofing membrane is processed with rubber as the main material, and is widely used in waterproof projects on building roofs, basements, tunnels, reservoirs and other parts. Butyl rubber waterproofing membrane has the performance characteristics of low air permeability, heat resistance, aging resistance and chemical corrosion resistance, with good waterproof effect and long service life. However, the market price of butyl rubber is very high, and the use of butyl reclaimed rubber instead of butyl rubber to produce waterproofing membrane can effectively reduce the cost of raw materials.
1. Formula and process of vulcanized waterproofing membrane production of all-butyl reclaimed rubber
(1) Formula: 100 parts of butyl reclaimed rubber, 5 parts of zinc oxide, 3 parts of stearic acid, 2 parts of antioxidant, 20 parts of carbon black, 80 parts of talc, 20 parts of engine oil, 2 parts of accelerator M, 1 part of accelerator TMTD, 1 part of accelerator PX, 1 part of accelerator NC, 2 parts of sulfur; Total 237 copies.
(2) Production process: calendered film is 1.5-2mm, using a cloth coil to send into the vulcanization tank or drum vulcanizer for vulcanization, the vulcanization condition of the vulcanization tank is generally set to 160 °C×1h. Vulcanized waterproofing membrane produced entirely with butyl reclaimed rubber is widely used in roof waterproofing, with excellent aging resistance, low cost and long service life.
2. Formula and process of non-vulcanized waterproofing membrane production of all-butyl reclaimed rubber
(1) Formula
100 parts of butyl reclaimed rubber, 3 parts of stearic acid, 100-150 parts of clay, 15-20 parts of softener.
100 parts of butyl reclaimed rubber, 2 parts of antioxidant, 6 parts of softener, 65 parts of filler, a total of 173 parts.
(2) Production process: The open mill uses mechanical method to plasticize and regenerate waste butyl micelles, then add various compounding agents for mixing, calender out the sheet after parking and hot refining, and finally cool, coil, package and store.
3. Full butyl reclaimed rubber is blended with asphalt to prepare non-vulcanized waterproofing membrane
(1) Formula: 30 parts of butyl reclaimed rubber, 20 parts of petroleum asphalt, 50 parts of filler.
(2) Performance characteristics: butyl reclaimed rubber asphalt non-vulcanized waterproofing membrane has the characteristics of large elongation, non-foaming, impermeable, non-sticky, etc., and ordinary tire reclaimed rubber can also be blended with asphalt to make waterproof membrane.
Butyl reclaimed rubber has good air tightness, water tightness, heat resistance, aging resistance, chemical resistance, used in the production of waterproofing membrane, reasonable design of butyl reclaimed rubber waterproofing membrane formula, not only can maintain the excellent waterproof performance and aging resistance of the waterproofing membrane E4LYY812, but also can effectively reduce the cost of raw materials, is an ideal raw material for the production of high-performance, low-cost waterproofing membrane.
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