Butyl Rubber Lining

Butyl rubber, halogenated butyl rubber linings and ethylene propylene rubber linings have excellent chemical resistance at temperatures up to 120°C. There are cases where butyl rubber linings have been subjected to temperatures down to —65°C without deterioration. Linings based on these polymers do not exhibit good abrasion resistance, which can only be rated as fair. 

Illmenite sand with steam and hydrochloric acid was handled in the spherical digesters. The temperature in the digesting process was ambient to more than 130°C. Therefore brick lining was applied on a butyl rubber lining 5 mm thick with hardness of 55°A. The rubber serves as a cushioning medium beneath the brick lining, as well as resisting the temperature at the brick rubber interface of about 100°C. 

Butyl rubber linings have the following advantages ... 

The standard polymers used for rubber linings consist of materials that are cross-linkable macromolecules which, on mixing with suitable reactants that form strong chemical bonds, change from a soft deformable substance into an elastic material. These polymers include natural rubber and its corresponding synthetic, c/s-polyisoprene, styrene-butadiene rubber, polychloroprene, butyl rubber, halogenated butyl rubbers, acrylonitrile-... 

In-line extrusion, 19 543 In-line filtration, 15 827 Inline motionless mixers, 16 711-716 In-motion checkweighers, 26 245 Inner-Helmholtz plane (IHP), 3 419 Inner transition-metal perchlorates, 18 278 Inner tubes, butyl rubber for, 4 434, 453 Innohep, 4 95t 5 175... 

ZnCFO is the effective vulcanization active component of the sulfur, thiuram, peroxide and metaloxide vulcanization systems for isoprene, nitrile-butadiene and chloroprene rubbers at the same time it is not effective in resin vulcanization system for butyl rubber. On a degree of positive influence on the properties of elastomeric compositions vulcanization systems with ZnCFO are arranged in a line ... 

The University of California field stations have dealt with dilute pesticide waste disposal on an experimental basis by using lined soil evaporation beds. The beds typically are 20 x 40 x 3 ft pits lined with a butyl rubber membrane and back filled with 12 to 18 Inches of sandy loam soli. Figure 1 Is a cross secton of such a bed. Used containers and spray equipment are washed on an adjacent concrete slab the wastewater drains Into a sedimentation box for trapping particulates, followed by a distribution box In the bed. From the distribution box, the dilute pesticide solutions run underneath the soli surface through leach lines made of 4 Inch perforated PVC pipe. The system Is designed so that water moves up through the soli by capillary action and evaporates off the surface. 

Un-vulcanized butyl rubber/PVC lining for autoclave vulcanization or hot-air vulcanization. 

Pre-vulcanized Butyl Rubber/PVC Lining with Cold Bond Adhesive System... 

Un-vulcanized Butyl Rubber/PVC Lining for Autoclave Vulcanization or Hot-air Vulcanization... 

Many different synthetic elastomers are also compounded and calendered to form sheet lining materials. Examples are neoprene, Hypalon, butyl and chlor-butyl rubber. 

For zinc oxide at, for example, levels of 15 to 45 phr, good filler dispersion is essential for better dimensional stability in calendered sheets. Butyl sheets are used in storage tanks, digesters and other large equipment handling phosphoric acid, hydrochloric acid and sulfuric acid very effectively in fertiliser and chlor-alkali plants. When high temperatures are encountered, carbon bricks or acid resistant bricks are lined over the rubber lining. 

Butyl rubber is used in specialty application such as reservoir or canal linings, tank linings, pharmaceuticals and sealing caulks. The low unsaturation and low permeability of the rubber molecule contribute to the chemical inertness of the butyl rubber. 

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