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Ensinger PEI

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CHT ALPATEC 740 RTV Silicone Adhesive Sealant
Categories: Polymer; Thermoset; Silicone; Silicone, RTV, Adhesive/Sealant Grade

Material Notes: Description: This is a 1-part, RTV (Room Temperature Vulcanizing) silicone adhesive sealant. It is one in a range of Acetoxy cure products which are solvent free. During cure, it liberates a very small amount of acetic acid, giving rise to the familiar ‘vinegar’ odour, which quickly dissipates after cure. It exhibits good primer-less adhesion to many substrates including but not limited to; aluminium, nonferrous metals, steel, glass, enamelled surfaces, fabrics ceramics, thermosetting, thermoplastics and wood and cures rapidly at room temperature when in contact with atmospheric moisture. This product is not to be recommended for use with galvanized metals, ferrous metals, copper and its associated alloys or in electronic assemblies.

Key Features

  • Good resistance to chemicals (detergents)
  • Excellent elongation
  • High transparency
  • Complies with Ökotex 100
Key Applications:
  • Tin free
  • Solvent free
Application: Due to the tin-free catalyst the silicone elastomers require temperatures of 70 – 80 °C for 30 – 40 min and an air humidity of 5 – 7 % for fixation. Higher air humidity leads to a destruction of the catalyst and higher temperatures lead to a premature skin formation, which inhibits the reaction, so that the silicone layer remains tacky. Thicker silicone layers need longer curing times. A layer thickness of > 5 mm ought to be avoided. Special remark : Direct contact of certain cosmetic articles (skin creams) with the silicone layer can lead to a change in colour. We therefore recommend carrying out pre-trials in production with these care products in use and to point this out on the ready-for-use products if necessary

Cured Product: Standard climate DIN 50 014 - 23/50-2. Vulcanizate tested after 14 days

Information provided by CHT Group

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Physical PropertiesOriginal ValueComments
Density 1.02 g/ccDIN 53 479, 23
Storage Temperature 5.00 - 30.0 °C
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 17DIN 53 505
Tensile Strength 247 psiDIN 53 504, S 3 A
Elongation at Break 480 %DIN 53 504, S 3 A
Tear Strength 20.0 pliASTM D 624, Die B
 
Processing PropertiesOriginal ValueComments
Cure Time 4.00 minSkin formation time, paper method; DIN 50 014 - 23/50-2
 30.0 - 40.0 min
@Temperature 70.0 - 80.0 °C
5 - 7% RH
Shelf Life 12.0 Month
 
Descriptive Properties
ColorTransparent
Cure typeAcetate
Flow63 mm10 ml
Self BondingYes

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PCHTSIL184 / 314667

Proto3000 – 3D Engineering Solutions

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