Methyl Phenyl Silicones

Methyl Phenyl silicones are specialty products that have varying refractive index values that increase with phenyl concentration. The presence of phenyl offers many enhancements to formulations:

  • Oxidation resistance
  • Thermal stability
  • Shear resistance
  • Optical clarity
  • Radiation resistance
  • Extreme temperature resistance
Trimethylsiloxyterminated dimethyl diphenyl polysiloxanes that are available with various phenyl contents and viscosities. These fluids are most often used in high and low temperature applications to enhance temperature stability. Low temperature flexibility can be improved with phenyl contents of 3-8 mole %. Higher phenyl contents improve high temperature thermal stability.

NAME PHENYL CONTENT REFRACTIVE INDEX VISCOSITY AVAILABLE DOWNLOAD
Andisil® SF 1208 4.2 Mole% 1.4215 80 cSt Data Sheet
Andisil® SF 1221 4.2 Mole% 1.423 160 cSt Data Sheet
Andisil® SF 1222 7.6 Mole% 1.436 225 cSt Data Sheet
Andisil® SF 1223 11.0 Mole% 1.456 225 cSt Data Sheet
Andisil® SF 1230 13.0 Mole% 1.463 13,000 cSt Data Sheet
Andisil® SF 1143 † 23.0 Mole% 1.49 175 cSt Data Sheet
Andisil® SF 1243 23.0 Mole% 1.49 175 cSt Data Sheet
† Low volatility
*These properties are not intended to be used as specifications but only as suggested characteristics
Vinyl-terminated dimethyl diphenyl polysiloxanes that are available with various phenyl contents and viscosities. Phenyl contents of 3-8 mole % optimize low temperature characteristics. The higher phenyl content materials can be used for index matching which improves clarity. All of these polymers are used in addition curing formulations in which a platinum catalyst and silicon-hydride crosslinker are present.

NAME PHENYL CONTENT REFRACTIVE INDEX VISCOSITY AVAILABLE DOWNLOAD
Andisil® SF 1421 3.0 Mole% 1.415 1,100 cSt Data Sheet
Andisil® SF 2421 CV ** 3.0 Mole% 1.4185 1,100 cSt Data Sheet
Andisil® SF 1721 7.0 Mole% 1.424 7,000 cSt Data Sheet
Andisil® SF 2430 CV ** 13.0 Mole% 1.4635 1,550 cSt Data Sheet
Andisil® SF 9530 CV ** 13.0 Mole% 1.4635 10,000 cSt Data Sheet
Andisil® SF 2450 CV ** 29.0 Mole% 1.5165 625 cSt Data Sheet
Andisil® SF 6550 CV ** 29.0 Mole% 1.5165 7,000 cSt Data Sheet
Andisil® SF 2465 CV ** 42.0 Mole% 1.54 2,500 cSt Data Sheet
Andisil® SF 4565 CV ** 42.0 Mole% 1.54 4,500 cSt Data Sheet
** Controlled Volatility
These properties are not intended to be used as specifications but only as suggested characteristics
Additives for the improvement of mechanical properties in high phenyl containing systems. The mechanical properties of the unfilled RTV are rather poor, therefore the properties are improved with the addition of appropriate fillers i.e. carbon black, fumed or precipitated silica and other fillers well known to formulators with expertise in compounding silicones.

NAME DESCRIPTION REFRACTIVE INDEX AVAILABLE DOWNLOAD
Andisil® MVT 152 Additive for high phenyl containing systems 1.529 Data Sheet
Andisil® MVT 154 Additive for high phenyl containing systems 1.547 Data Sheet
*These properties are not intended to be used as specifications but only as suggested characteristics
NAME DESCRIPTION SiH CONTENT VISCOSITY AVAILABLE DOWNLOAD
Andisil® XL 2450 SiH Functional 3.00 mmoles/gm 400 cSt Data Sheet
Andisil® XL 2460 SiH Functional 3.85 mmoles/gm 350 cSt Data Sheet
Andisil® XL 245 PT SiH Functional 8.50 mmoles/gm 2.5 cSt Data Sheet
*These properties are not intended to be used as specifications but only as suggested characteristics
NAME % PT DESCRIPTION AVAILABLE DOWNLOAD
Andisil® 782 Catalyst 2.25 For use with high phenyl content (> 35% by wt) Si polymers Data Sheet
Andisil® 785 Catalyst 0.50 For use in high RI formulations
*These properties are not intended to be used as specifications but only as suggested characteristics

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