GE Bayer Silicones



  TSE3221
  Flowable, Heat Cured  One Component Silicone Adhesive
Product Description 

TSE 3221 is a one-component, flowable, heat curing adhesive which is translucent in color and offers primerless adhesion to a wide variety of substrates. This product requires an elevated temperature cure and exhibits very low linear shrinkage.
Key Performance Properties 
  • One component product-no mixing required
  • Fast cure at elevated temperature
  • Primerless adhesion to many types of substrates
  • No cure by-products, low linear shrinkage
  • Non-corrosive to metals and sensitive substrates
  • Excellent dielectric properties
  • Outstanding performance over a wide thermal range
Typical Product Data 
Uncured Properties  
Color Translucent
Viscosity, cps 55,000
Cured Properties (cured 1 hour at 150C)  
Specific Gravity 1.03
Hardness, (JIS A) 28
Tensile Strength, psi (kgf/cm2) 341 (24)
Elongation, % 290
Adhesion, psi (kgf/cm2) (Al to Al) 284 (20)
Dielectric Strength, volts/mil 534
Dielectric Constant 2.8
Volume Resistivity, ohm-cm 2x1015
Specifications 

Typical product data values should not be used as specifications. Assistance and specifications are available by contacting GE Silicones at 800/255-8886.
Instructions for Use 

Compatibility

TSE 3221 silicone adhesive will cure in contact with most clean, dry surfaces. However, certain materials, such as butyl and chlorinated rubber, sulfur-containing materials, amines, and certain metal soap cured RTV silicone rubber compounds can cause cure inhibition. Cure inhibition is characterized by a gummy appearance of the TSE 3221 silicone adhesive at the interface between the adhesive and the substrate to be bonded. It is recommended that a patch test be performed with the TSE 3221 silicone adhesive to determine substrate compatibility.

Surface Preparation

The adhesive performance of any polymer system is highly dependent upon proper surface preparation. In order to maximize the adhesion of TSE 3221 silicone adhesive and minimize the potential for cure inhibition, all parts should be as clean and dry as possible prior to the application of the adhesive.

Bonding

TSE 3221 silicone adhesive offers outstanding adhesion characteristics to a wide variety of different substrates without the need of a primer.

For difficult-to-bond substrates, or where more aggressive chemical adhesion is desired, the adhesion may be enhanced by using SS4155 silicone primer, available from GE Silicones. To apply the primer, thoroughly clean the surface and let dry. Then apply a uniform film (0.01-0.02 mm/ 0.5-1.0 mil) of SS4155 silicone primer and allow the primer to air dry for one hour or more. For more details on priming and adhesion, please refer to GE Silicones product data sheet on silicone primers (#1873).

Curing

TSE 3221 silicone adhesive requires the use of elevated temperatures in order to achieve full cure. Typical cure times and temperatures are as follows:

Temperature TSE 3221
100C 3 hours
125C 90 minutes
150C 1 hour

The actual cure time is affected by such things as cross-sectional thickness of the TSE 3221 silicones adhesive, heat capacity of the overall assembly and efficiency and type of oven used (i.e. convection, infrared). If an oven is used, it should be well ventilated.
Handling and Safety 

Material Safety Data Sheets are available upon request from GE Silicones. Similar information for solvents and other chemicals used with GE Products should be obtained from your suppliers. When solvents are used, proper safety precautions must be observed.

CAUTION

Uncured TSE 3221 silicone adhesive can generate flammable hydrogen gas upon contact with acidic, basic, or oxidizing materials. Such contact should be avoided.
Storage and Warranty Period 

The warranty period for TSE 3221 silicone adhesive is 6 months from date of shipment from GE Silicones if stored in the original unopened container at or below 10C (50F).
Availability 

Products may be ordered from GE Silicones, Waterford, NY 12188, the GE Silicones sales office nearest you, or where appropriate, or an authorized GE Silicones product distributor.
Government Requirement 

Prior to considering use of a GE Silicones product in fulfilling any Government requirement, please contact the Government and Trade Compliance office at 413-448-4624.

CDS5121

 
 

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