Silastic® Q7-7840

Category: Silicone , Silicone
Manufacturer: Dow Corning Corporation
Trademark: Silastic®
Fillers: -
Ports: Qinzhou, Shekou, Shanghai, Ningbo
Delivery Terms FOB, CIF, DAP, DAT, DDP
PDF: bL3Ctb_SilasticQ77840.pdf
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Liquid Silicone Rubber (LSR) raw material for medical device and component fabrication in the Healthcare Industry

APPLICATIONS
Silastic® Q7-7840 Liquid Silicone Rubber, Silastic ® Q7-7850 Liquid Silicone Rubber, and Silastic ® Q7-7870 Liquid Silicone Rubber, Parts A and B, are heat-cured elastomers for use by customers fabricating medical devices, including those intended for implantation in humans for less than 30 days and non-implant applications.

Silastic Q7-7840 Liquid Silicone Rubber, Silastic Q7-7850 Liquid Silicone Rubber, and Silastic Q7-7870 Liquid Silicone Rubber are two-part platinum-catalyzed silicone elastomers specifically designed for liquid injection molding or supported extrusion. The elastomer is supplied as a two-part kit (Part A and Part B), equal portions (by weight) of which must be thoroughly blended together prior to use. The elastomers are thermally cured via an addition-cure (platinum catalyzed) reaction. When blended and cured as indicated the resulting elastomers consist of crosslinked dimethyl and methyl-vinyl siloxane copolymers and reinforcing silica.

The elastomer can be used without any post-cure. Furthermore, the cured elastomer is heat stable up to 204°C (400°F), can be autoclaved, and exhibits high gas permeability compared with most other thermoset elastomers and thermoplastics.
General Information
Features
  • High Gas Permeability
  • No frost
  • Fast curing
  • Good coloring
  • High pressure heating resistance
Uses
  • Medical/nursing supplies
Agency Ratings
  • EP Unspecified Rating
  • ISO 10993-Part I
  • USP Class VI
Processing Method
  • Extrusion
  • Injection molding
PhysicalNominal ValueUnitTest Method
Specific Gravity 1.14g/cm³ASTM D792
Molding Shrinkage - Flow 2.4%Internal method
HardnessNominal ValueUnitTest Method
Durometer Hardness (Shore A)40ASTM D2240
ElastomersNominal ValueUnitTest Method
Tensile Stress (200% Strain)1.70MPaASTM D412
Tensile Strength 9.30MPaASTM D412
Tensile Elongation (Break)750%ASTM D412
Tear Strength 131.1kN/mASTM D624
Additional InformationNominal ValueUnit
Cure Rate - MDR T90 2(150°C)29.0sec
Note Message
1 .B mould
2 .3 min
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