LSR Liquid Silicone Rubber

Description MC RTV1040 is a two component elastomer cross-linking at room temperature. The polymerization can be accelerated by heat (max.1500 C). The silicone components are delivered as liquids, which once mixed and cured transform into a transparent, elastic and resistant material. Polymerization occurs without formation of heat. Advantages1. Easy curing: MC RTV1040 polymerizes at room temperature (230 C).The curing characteristics are independent of part thickness.2. High Transparency3. High tear and tensile strength4. Long shelf life with low shrinkage5. Fast mixing (10:1) and easy processing due to the low viscosity ApplicationsLabel manufacturing, Molding applications requiring low shrinkage eg toys, jewelers, automotive, rapid prototyping etc. Technical datasheetItem RTV 1040ColorclearCuring agentCA30Mixing ratio100:10Mixed viscosity85000-90000 cpsWorking time 60 minsCuring time 12 HoursHardness40 Shore ATear Strength27 N/mmTensile Strength6 MpaShrinkage≤0.1%Elongation at break360%Relative density 1.1 g/cm3Instructions1. Mixing the two componentsAccording the mixing ration 10:1 weighting A and B,the two components may be thoroughly mixed either by hand or using a low –speed electric to minimize the instroduction of air and to avoid any temperature increase. Note:It is also possible to use a special mixing and dispensing machine for the wo silicone components,Futher information is available upon request.2. MouldingThe mixture should be degassed preferably at 30 to 50 mbar to eliminate any entrapped air.If a dispensing machine is used,the two components are degassed separately prior to mixing.The silicone mixture expands to 3—4 times of its initial volume and bubbles rise to the surface.The bubbles progressively disappear and the mixture reuturns to its initial volume after 5 to 10 minutes. Wait a few minutes to complete the degassing and then flash the vacuum. The silicone is ready for pouring, either by gravity or under low pressure.Note: Flaslhing the vacuum once or twice accelerates the degassing.It is recommended to use a container with a high diameter/height ratio(3 to 4 times of the initial volume)3. PolymerisationThe curing may be slowed down at lower temperature or accelerated by applying heat.Note: in general contact with certain materials can inhibit the crosslinking of RTV.Natrual rubbers vulcanized with sulphurRTV elastomers catalysed with metal salts,eg. Tin compoundsPVC stabilized with tin salts and additives Epoxy catalysed with aminesCertain organic solvents,eg. Ketones,alcohols,ether etc. In case of doubt,it is recommended to test the substrate by applying a small quantity of the mixed silicone on a restricted area. Storage and shelf lifeMC RTV1040 A and B must be used within 6 months from the manufacturing date.Beyoud this date,MC silicone no longer guarantees the products confirms with the salesSpecification.In order to preserve best properties it is recommended to follow strictly the following guildlines:Store the original packing tightly sealed and at a temperature below 30 CUse the product as soon as the packaging has been opened.