Dow HV 1551/70P

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Description for Dow HV 1551/70P

Low viscosity; sustained hydrophobicity; high tear strength; low cure temperature; good tracking resistance.

Application Type	Pot, Encapsulate
1 Part or 2 Part	1-Part
Material Form	Liquid
Manufacturer	Dow
Chemistry	Silicone rubber
Cure Method	Pressure Sensitive, 2-Part Cure, Heat
Cure Temperature (°C)	Low, 120, 200, 120
Cure Time (min)	10, 240, 0.13 to 0.23
Viscosity (cPs)	Low, 75000 (mPa.s)
Other Resistance	Tracking Resistance
Volume Resistivity (O)	1.5e15 (ohms/cm)

Best Practices for Dow HV 1551/70P

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Technical Data for Dow HV 1551/70P

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Overview

Application Type
- Pottant / Encapsulant - Pot, Encapsulate
1 Part or 2 Part
- 1-Part
Material Form
- Liquid
Chemistry
- Silicone - Silicone rubber
Cure Method
- Pressure Sensitive (min) - Pressure Sensitive
- Heat
- 2-Part Cure

Specifications

Cure Specs

Cure Temperature (°C)	Low, 120, 200, 120	Test Method
Cure Time (min)	10, 240, 0.13 to 0.23	Test Method
Viscosity (cPs)	Low, 75000 (mPa.s)	Test Method
Work / Pot Time (min)	4,320	Test Method
Mix Ratio	1:1 (by volume)

Bond Strength

Tear Strength (piw)	High, 28 (kN/m)	Test Method
Tensile Strength (psi)	5.5 (Mpa)	Test Method

Material Resistance

Other Resistance	Tracking Resistance

Conductivity

Dissipation Factor	0.00060	Test Method
Dielectric Strength (V/mil)	770	Test Method
Dielectric Constant	2.70	Test Method
Volume Resistivity (O)	1.5e15 (ohms/cm)	Test Method

Hardness

Shore A Hardness	38	Test Method
Elongation (%)	5	Test Method

Other Properties

Specific Gravity	1.090	Test Method
Flash Point (°F)	212.0
% Solids (%)	100

Business Information

Shelf Life Details	When stored at or below 32°C (90°F) in the original unopened containers, this product has a usable life of 6 months from the date of production.;The curing agent and base can be sensitive to moisture or contaminants, it is recommended that containers are sealed tightly after use.
Shelf Life Type	from the date of production
Shelf Life (mon)	6

Best Practices for Dow HV 1551/70P

*See Terms of Use Below
1. Mixing
  
  Mix parts A and B in a 1:1 ratio. Meter mix equipment which pumps, meters and mixes the two components without the incorporation of air is strongly recommended for production.
  
  Hand or mechanical mixing can be used but do not mix for an extended period of time or allow the temperature to exceed 35°C (95°F). It is very important to control the B to A ratio very precisely.
2. Deairing/Degassing
  
  If air bubbles are entrapped during mixing the mixture must be thoroughly de-gassed under vacuum.
3. Curing
  
  DOW CORNING HV 1551/70P cures rapidly at elevated temperatures. A 2mm cross-section requires 8-14 seconds at 120°C (248°F). The cure time depends on the thickness and the cure temperature used. Cure can be inhibited by contact with certain materials such as amines, sulphur and tin complexes.
4. Clean-Up
  
  The uncured silicone can readily be removed by most hydrocarbon solvents. Polar solvents, such as ketones and alcohols, are not suitable.
Comparable Materials for Dow HV 1551/70P

*See Terms of Use Below

Spec Engine^® Results
- HV 1510/40(Dow)
  Injection moldable; high tear strength; high elongation; fast cure and excellent tracking resistance.
- HV 1510/30(Dow)
  Injection moldable; high tear strength; high elongation; fast cure and excellent tracking resistance.
- HV 1760/80(Dow)
  Superior wet electrical properties; excellent tracking resistance; sustained hydrophobicity.
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