1. 1:1 addition type, good adhesive strength and self-healing
2. High elongation, excellent flexibility for mechanical stress relieving
3. Low oil penetration after cured, good anti-poisoning property
4. Good dielectric in high temperature for high voltage protection
5. Excellent aging resistance and weatherability
6. Excellent waterproof, corrosion prevention, moisture proof and chemical media resistance
Used for encapsulation of various modules, semi-conductor, IGBT, automotive ECU module, IC chip, weighing sensor, waterproof connector.
PROPERTY STANDARD/UNITS VALUE of SI2709
---- ---- PART A PART B
Material ---- Polysiloxane Hydrogen polysiloxane
Color Visual inspection Colorless Liquid Colorless Liquid
Viscosity 7;C, cps 800~1000 800~1000
Density 7;C, g/cm3 0.99 0.99
Mixture/mass ratio ---- A:B=100:100
Viscosity of mixture 7;C, cps 800~1000
Operation time 7;C, min 60
Cure condition RTV or HEAT 7;C /6 hour;67;C /30min
Cured appearance ---- Colorless transparent gel
Needle penetration 1/mm 75
Dielectric strength KV/mm 25
Volume resistance DC500V, ohm-cm 1.0¨¢1015
Loss factor 1 MHz88;0.001
Dielectric constant 1 MHz 2.8
Application temperature7;C -60~260
1.Solvent free two component material
2.Transparent both before and after cured
3.Platinum catalyzed curing system
4.No by-products after curing
5.Low viscosity before cured, easy to application
6.Excellent flexibility, free from stress
7.Extremely low oil exudation, good anti-poisoning
8.By adjusting the mix rate of part A and part B, can adjust the gel adhesion
9.It can stick repeatable
10.It can use with polyethylene release liner
11.Pass test of physiological compatibility, poison cell, skin stimulus etc.
PROPERTY STANDARD/UNITS VALUE of SI2721
---- ---- PART A PART B
Material ---- Polysiloxane Hydrogen polysiloxane
Color Visual inspection Transparent Liquid Transparent Liquid
Viscosity 7;C, cps 61;¨¤150161;¨¤150
Density 7;C, g/cm3 0.99 0.99
Mixture/mass ratio ---- A:B=100: (80~120)
Viscosity of mixture 7;C, cps 800¨¤150
Operation time 7;C, min ¡ê¾60
Cure condition RTV or HEAT 7;C /6 hour; 67;C /5min
Cured appearance ---- Transparent gel
Application temperature §C -60~200
Part Aa20 KG/Bucket, Part Ba20 KG/ Bucket; Part Aa200 KG/Drum, Part Ba20 KG/ Drum.
Part A is also available in 200 kg metal drums accompanied by the corresponding 200 kg of Part B.
Chemical name : Polydimethylsiloxane
CAS No. : 63148-62-9
EINECE : 618-493-1
Apperance : colorless and transparent
Physical and chemical features :
a.Smoothness & softness & hydrophobicity & good chemical stability & insulation property
b.High and low temperature resistance & high flash point.
c.Low freezing point (it can be chronically used in the temperature from -50? to +200 ?).
d.Small viscosity-temperature coefficicent & big compression ratio & low surface tension.
1. Used in aluminum: an additive to aluminum alloys, silicon is used to increase the fluidity and tenacity of Aluminum and its alloys, which enjoy good castability and weldability accordingly.
2. Used in organic chemicals: silicon metal is used in manufacturing a number of sorts of silicones, resins, and lubricants.
3. Used in electronic parts: silicon metal is used in producing monocrystalline and polycrystalline silicon of high purity for electronic parts, such as semi conductors, etc.
In plastic woven bags of about 10KG,250 KG and 1MT net each.
Applications of RTV-2 manual molding silicone rubber
It is mainly applied in manual mold design, PVC plastic mould, cement product mould, low melting-point alloy mould, alloy toy craft, plastic toy, craftwork, gift and stationery, big statue, cultural relic duplication and reproductions; pad printing orientation, electronic appliances vibration resistance, etc.
Features of RTV-2 manual molding silicone rubber
Low shrinkage,no deformation of the mould, good elasticity, the more moulds duplicated the better, etc.