Chloroprene-rubber base flame retardant adhesives
For fixing electric devices, with outstanding electrical properties.
Products Category Adhesive
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Comparison
SC121

Product Name

 SC121

Suitable use

 For fixing electronic devices

Application

 Computers / AV / Cellular phones

Features
  • UL94 V-0 Certified (No. E63260; not for use in current-carrying parts)
  • High bonding strength ensuring tight fixing
  • Highly viscous and thixotropic, permitting application to a vertical surface
 
 

Specifications
Main component Chloroprene rubber base
Color Yellowish white
Viscosity (Pa.s) 10 to 17
Solid content (%) 44 to 48
Specific gravity 0.9 to 1.0
Diluent Toluene, MEK etc.
Container 180ml Tube/1kg can or 15kg can

Application Example
  • Bonding and fixing of components in non-conductive positions
  • For bonding of materials soluble in toluene, MEK (such as polycarbonate, Noryl, ABS or acrylics), please contact us beforehand.

※Please be sure to avoid any use of these materials in electronic components that are to be energized electrically to prevent tracking or similar problems.
We recommend applying our polyester resin-based self-extinguishing adhesives SC608Z2 and SC608LVZ2.

[ Precautions on the use of chloroprene rubber-based adhesives ]
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Technical Data
SC121 contains solvent. Apply the product to the substrate, and wait for about three minutes ("open time") to let the solvent evaporate partially before actual bonding. The open time depends on ambient temperature. The bonding strength increases as the solvent evaporates.
   
1.Residual solvent in the adhesive and drying time after application  
Results
Residual solvent rate
2.Bonding strength and time elapsed after bonding Shear strength test
Test Piece Condition
Substrate: Glass-epoxy plate/Glass-epoxy plate
Coated amount: 300 µm thick wet, on both sides
Open time: 3 min
Bonding: 49N/cm,3 min
Peeling speed: 10mm/min
Aging atmosphere: 20°C 60%RH
Results
(N/cm²)
  Initial 3 hrs 1 day
 3 days 7 days 10 days 15 days
Shear strength 10 to 139
 191 243 270 293 277
3.Bonding strength under different atmospheres 180°Peeling strength test
Test Piece Condition
Substrate: Steel/Canvas
Peeling angle: 180°  
Peeling speed: 50mm/min
Aging atmosphere: 60°C 12hr
Results
(N/2.5cm)
  -20 0 20 40
 60 80 100 120
SC121 39.2 54.9 65.7 72.5 66.6 53.9 21.6 14.7
Conventional type 39.2 56.8 68.6 68.6 62.7 39.2 17.6 4.9
4.Shear strength and its reliability for different substrate Shear strength test
Test Piece Condition
Coated amount: 300 µm wet CF : Cohesive failure
AF : Adhesive interface failure
ACF : CF+AF
Open time: 3 min 
Bonding: 49N/cm
Initial: 60°C 1 hr
Peeling speed: 10mm/min
Results
(N/cm²)
Substrate Initial After aging Aging condition
Styrol/Styrol 246ACF 247ACF 60°C
100 hrs
ABS/ABS 219ACF 329ACF
Acrylic board/Acrylic board 246ACF 286ACF
PVC/PVC(rigid) 241ACF 290ACF
Paper phenol board/Paper phenol board 343ACF 364ACF 100°C
100 hrs
Glass-epoxy circuit board/ Glass-epoxy circuit board 270ACF 375ACF
Copper/Copper 266ACF 319ACF
Iron/Iron 221ACF 466ACF
Aluminum/Aluminum 199ACF 366ACF
Glass-epoxy circuit board/ glass-epoxy circuit board 270ACF 392AF 100°C
500 hrs
Copper/Copper 266ACF 270ACF
Glass-epoxy circuit board/ glass-epoxy circuit board 270ACF 368ACF 40°C 90%
500 hrs
Copper/Copper 266ACF 368ACF
5-1.Electrical property  
Insulation resistance increases as the solvent evaporates. Insulation resistance was measured on a test circuit pattern after JIS Z3197 formed on a glass-epoxy substrate coated by 35µm -thick copper foil.
Test Piece Condition
Coated amount: 300 µm wet [ Measured after charging with 500 V for 1 min ]
Aging time: 3 min 
Results
Aging time 1 min 3 min 5 min 10 min 30 min 60 min 24 hrs
Insulation resistance 6.0x108 1.0x109 6.0x1010 1.0x1011 2.0x1012 7.0x1012 1.0x1013
5-2.Stability of insulation resistance  
Test Piece Condition
  • [ Comb-shaped electrode JIS Z3197 ]
  • [ Conductor space 1.27mm ]
  • [ Measured after charging with 500 V for 1 min ]
Results
Initial After aging Aging condition
1.0 x 1013 1.0 x 1011
1.0 x 108		 100°C 250 hrs
500 hrs
2.0 x 1012
4.0 x 1011
3.0 x 1011		 40°C 90% 96 hrs
250 hrs
500 hrs
 
6. Impact force resistance  
Test Piece Condition
  • A diskrete capacitor 2 g or 10 g in weight was bonded on a glass-epoxy circuit board (5 x 5 cm in size). The assembly was aged for seven days at 20°C in an atmosphere of 60% in RH. The assembly was then dropped from a height of one meter.
Results
Capacitor weight Number of trial falls Result
2g 10 times No change
10g 10 times No change
   
7.Expansion ratio & inflection point  
Test Piece Condition
  • Expansion ratio was measured by the compression loading method using a Rigaku thermomechanical analyzer (TMA).
Results
Expansion ratio α Inflection point °C
7.97 x 10-5/°C(20 to 112°C)
-1.43 x 10-4 /°C(112 to 150°C)		 112
8.Storage  
The product should be stored under conditions suitable for adhesives. Follow instructions in instruction manuals or as shown on the labels. The maximum shelf life of adhesives is one year. Use the lots out of a large quantity stored in order of age. Adhesives containing solvents are hazardous materials. Observe the provisions of fire prevention laws.
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Notes  
  1. Check before operation
    Check the relevant material safety data sheet (MSDS) and instruction manuals for precautions required for operation.
  2. Operation environment
    • Keep ignition sources away.
    • Use a local ventilator to ensure sufficient air circulation.
  3. First aid
    • Learn action to take from the MSDS and instruction manuals.
    • In case of eye contact, vapor inhalation or swallowing, seek medical attention immediately.
  4. Storage
    Store the product in a tightly closed container in a predetermined place at room temperature, avoiding direct sunlight.
  5. Prohibition of unintended use
    Never use the product except as an adhesive.
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caution The technical data in this document, which was acquired based on reliable tests, does not guarantee full performance as per the documentation in any instance. Users assume total responsibility and risk for use of this product for any purpose under any usage conditions.