Clear self-repairing encapsulating silicone gel

Description:

JOMS 5715 A & B is a two component silicone elastomer that crosslinks at room temperature by polyaddition reaction.The pueolymerisation can be accelerated by heat ( max. 150℃ ).The silicone components are delivered as two component low viscous liquids, which once mixed and cured,transforms into a transparent coloured,solid,  elastic,self  rebound  and  resistant material. Polymerisation occurs without formation of heat.The cured gel is used in some medical applications with  high  strength,  such  as  mattress,  headrest, goggles, skin sticker.

Advantages:

Fast mixing (  1:1) and easy processing due to the low viscosity.

Room curing at normal.

Very    fast    curing    kinetics    at    elevated temperature .

Adhere and elastic surface

High tensile strength

Characteristics

1. Components
   

   	Part A	Part B
   Appearance	Low viscous liquid	Low viscous liquid
   Color	Transparent	Transparent
   Viscosity at 25℃	Approx1000 mPa.s	Approx.900 mPa.s
   Density at 25℃	0.99   g/cm3	0.99   g/cm3

   2. Mixed components

   Mix ratio	A:B = 100:100 by volume
   Viscosity after Mixing	Approx.1000 mPa.s
   Potting life	50±10 minutes at 25℃
   Cruing  time	10 hours at 25℃

   3 . Cured compound

   Test  at  25℃ after  curing  7days  at  RTV

   Appearance	transparent
   Penetration,1/mm	75士10
   Dielectric Strength,KV/mm	25
   Volume  Resistivity,Ω·cm	1.0×10
   Dielectric Constant at 1 MHz	2.8
   Range of Using temperature	– 60~260 ℃

   Processing

   1. Mixing the two components

   JOMS 5715 A &  B are mixed by weight in a fixed ratio given above.

   The  two  components  may  be  thoroughly  mixed either  by  hand  or  using  a  low-speed  electric  or pneumatic mixer to minimise the introduction of air and to avoid any temperature increase.

   Note: It is also possible to use a special mixing and dispensing machine for the two silicone components .

   Further information is available upon request.

   2 .   Handling

   The 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 to 4 times of its initial volume and bubbles rise to the surface .The bubbles progressively disappear and the mixture returns to  its  initial volume after 2 to 3  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:    Flashing   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 .    Polymerisation

   The  system,  as  indicated  in  the  technical  data, polymerises at 25℃ .The curing  may  be slowed down    at    lower    temperature     and    contrary accelerated by applying heat.

   Note: in general contact with certain materials can inhibit the crosslinking of RTV.

   See list below:

   .   Natural rubbers vulcanised with sulphur

   .   RTV elastomers catalysed with metal salts,e.g. tin compounds

   .   PVC stabilised with tin salts and additives

   .   Epoxy catalysed with amines

   .   Certain organic solvents, e.g.Ketones, alcohols, ether   etc.

   In case of doubts, it is recommended to test the substrate by applying a small quantity of the mixed silicone on a restricted area.

   Storage and Packaging

   JOMS 5715 A &  B  must  be  used within  12 months with respect to the manufacturing date.

   In   order   to   preserve   best   properties   it   is recommended   to   follow   strictly   the   following guidelines:

   Store the original packing tightly sealed and at a temperature below 30℃

   Use the product as soon as the packaging has been opened.

   JOMS 5715 A&B is delivered in 10kg/10kg containers.

   If  needed  special  containers  are  available  on request.