LSR Liquid Silicone Rubber

MC RTV 1040A silicone /RTV1040B catalyst

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.


Advantages

1. Easy curing: MC RTV1040 polymerizes at room temperature (230 C).The curing characteristics are independent of part thickness.

2. High Transparency

3. High tear and tensile strength

4. Long shelf life with low shrinkage

5. Fast mixing (10:1) and easy processing due to the low viscosity


Applications

Label manufacturing, Moulding applications requiring low shrinkage eg toys, jewellery, automotive, rapid prototyping etc.


Processing

1 Mixing the two components
According 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.Moulding
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—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 minuts.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.Polymerisation
The 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 sulphur
 RTV elastomers catalysed with metal salts,eg. Tin compounds
 PVC stabilized with tin salts and additives
 Epoxy catalysed with amines
 Certain 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.


Packaging

Part A: 20kg/drum Part B: 2 kg/drum
Special containers are available are on request.


Storage and shelf life


MC 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 sales
Specification.
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 C
 Use the product as soon as the packaging has been opened.

Payment: cash, bank transfer, T/T ,L/C at sight



Item  RTV 1040======
Color clear=========
Curing agent CA30========
Mixing ratio 100:10=====
Mixed viscosity 85000-90000 cps=
Working time 60 mins====
Curing time 12 Hours=====
Hardness 40 Shore A=======
Tear Strength 27 N/mm=====
Tensile Strength 6 Mpa=====
Shrinkage ≤0.1%========
Elongation at break 360%======
Relative density 1.1 g/cm3
==