Technical Library

Outline

UtenSil® Primer P1 Adhesive/Primer for Reprographic Grade Silicones PP1-USP1

Description: UtenSil® Primer P1 enhances the adhesion of reprographic silicones to a desired substrate.

Solution Properties:

  • color: clear, colorless
  • solids: 5-10%
  • flashpoint: -4 °C
  • specific gravity: 0.70
  • viscosity: 1.0-2.0 cSt

Shelf life: 12 months when stored below 25 °C in sealed containers. Keep container sealed after dispensing product.

Application Methods:

UtenSil® Primer P1 is applied as a coating by spraying, dipping, or brushing. The solvent is removed by evaporation in an exhausted area. Moisture-induced crosslinking occurs at room temperature over 1-2 hours at 35-85% relative humidity.

UtenSil® Bonding Agent B1 Bonding Agent for Reprographic Grade Silicones PP1-USB1

Description: UtenSil® Bonding Agent B1 binds reprographic silicone surfaces together irreversibly.

Solution Properties:

  • color: opaque, white (turns clear after deactivation)
  • solids: 5-10%
  • flashpoint: -1 °C
  • specific gravity: 0.78
  • viscosity: 2.0-3.0 cSt

Shelf life: 6 months when stored below 25 °C in sealed containers. Keep container sealed after dispensing product.

Application Methods:

UtenSil® Bonding Agent B1 is applied by spraying, dipping or brushing. The solvent is removed by evaporation in an exhausted area. Bonding of silicone surfaces occurs at 80 °C over 4 hours. After bonding is complete the process is deactivated by heating to 140 °C for 4 hours in a exhausted area. An amine odor is generated during the deactivation step.

UtenSil® Wetting Agent W1 Hydrophilic Modification Solution for
Reprographic Grade Silicones PP1-USW1

Description: UtenSil® Wetting Agent W1 increases the wettability of reprographic silicone surfaces.

Solution Properties:

  • color: clear, colorless
  • solids: 5-7%
  • flashpoint: 6 °C
  • specific gravity: 0.88
  • viscosity: 1.0-2.0 cSt
  • Contact angle, water (1 mm thickness): 20°

Shelf life: 12 months when stored below 25 °C in sealed containers. Keep container sealed after dispensing product.

Application Methods:

Immerse oxygen plasma treated reprographic silicone into UtenSil® Wetting Agent W1 for 1 hour. (Reprographic silicones with a thickness > 1 mm may require longer immersion time in UtenSil® Solution.) Dip the silicone into ethanol to remove excess
material. Cure wetting agent on silicone surface at 100 °C over 2 hours.

UtenSil® Dissolution Agent D1 Digestion Solution for Reprographic Grade Silicones PP1-USD1

Description: UtenSil® Dissolution Agent D1 Digestion Solution for Reprographic Grade Silicones

Solution Properties:

  • color: amber – light brown
  • solids: 20-30%
  • flashpoint: 93 °C
  • specific gravity: 0.85
  • viscosity: 5-10 cSt

Shelf life: 12 months when stored below 25 °C in sealed containers. Keep container sealed after dispensing product.

Application Methods:

Place silicone to be dissolved in a stainless steel or glass container which may be covered to reduce evaporation. Remove any water on the silicone by physical drying or heating in an oven. Immerse silicone in UtenSil® Dissolution Agent D1 solution at room temperature. Dissolution time depends on the type of silicone, thickness and surface area. A typical silicone with a 5 mm section thickness will dissolve in 4-8 hours. Dissolution can be accelerated by warming to 35-50 °C. Spot dissolution can be achieved by deposition of Dissolution Agent D1 with a pipette and removing the dissolved material with a pipette, followed by a brief acetone and water rinse

UtenSil® Cure Retarder R1 Cure Moderator Solution for Reprographic Grade Silicones PP1-USR1

Description: UtenSil® Cure Retarder R1 moderates the cure rate of vinyl-addition (platinum) cure silicones

Solution Properties:

  • color: clear, colorless
  • flashpoint: 112 °C
  • specific gravity: 0.98
  • viscosity: 300-500 cSt

Shelf life: 12 months when stored below 25 °C in sealed containers. Keep container sealed after dispensing product.

Application Methods:

UtenSil® Cure Retarder R1 is mixed with Part A of a 2-Part silicone RTV encapsulant formulation prior to throughly mixing with Part B. Increased concentrations of UtenSil® Cure Retarder R1 solution in Part A will increase the pot-life of the formulation at room temperature and slow the rate of the vinyl-addition (platinum) cure at elevated temperatures. In an exemplary procedure, mixing 1 wt% UtenSil®Cure Retarder R1 solution with Part A of PP2-OE41 will increase the pot-life of the catalyzed mixture from 18 hours to 48 hours at room temperature. Performance of UtenSil® Cure Retarder R1 may differ between RTV formulations depending on platinum concentration.