LV-2864A&B

D*CRIPTION

LV-2846A&B is a two-part,long working time and low temperature cure silicone elastomer supplied as A and B componenents specially designed for opto-devices potting applications.

LV-2846A&B offers the following features:

1．Easy of mixing

Can be easily mixed in 1 to 1 mix ratio of components by weight.

2．Nocorroseon

Addition cure system:no by-products generated.

3．igh light tran*issio

Excellent light tran*ission over 95% at 500-700nm.。

4．Low temperature cure

  Full cure at60℃*1 hour or 80℃*30 minutes.

5．Excellent dielectric propertes

  Cured rubber exhibits good dielectrec properties.

6．Excellent thermal stability and cold resistance

  Cured rubber provides wide service temperature range from –40℃~175℃

TYPICAL PROPERTI*

Specification writers:these values are not intended for use in preparing specifications.

As Supplied

Appearance                 partA                         transparent

Appearance                  partB                         transparent

Viscosity at 25℃             partA         cps           8

Viscosety at 25℃            partB         cps           8

Mixing Ratio,by Weight                                      1：1

Pot life at 25℃                             hour             8.0

As cured for 60 minutes at 100℃

Appearance                                               Transparent

Specific Gravity at 25℃                                        0.98

Hardness                   JISA          Shore A           25

Tensile strength                               psi             250

Elongation                                   %              150

Thermal conductivity                         W/Mk            0.15

Dielectric strength                            KV/mm          18

Volume resistance                           ohm.com       1.0*10¹⁴

Dielectric constant at 25℃      1MHZ                         2.5

Dissipation factor at 25℃       1MHZ                         0.002

CURING SCHEDUL*

After potting LV-2864A&B into opto-devices, follows below curing schedules.

1.     80℃*1hours

2.     100℃*30minutes

HOW TO USE

Mixing and de-airing

1.     Thoroughly mix equal amounts by weight of parts of A and B.

2.     Vacuum de-airing is recommended. A residual pressure of 10-20 mm mercury applied for 10 minutes will sufficiently de-air the material.

Curing

The mixture cures rapidly at elevated temperatures. A t*ical cure condition is 100℃for 30 minutes, however the cure conditeon should be well considered because it depends on the heat capacity of the modules in whichLV-2864A&B is applied.

Compatibility:Cure can be inhibited when in contact with certain materials such as organo-tin compounds, sulphur amines.

USABLE LIFE AND STORAGE

When stored at or below 32℃in the original unopened containers, LV-2864A&B has a usable life of 12 months from the date of production.

LIMITATIONS

Certain materials,chemicals,curing agents and plasticizers can inhibit the cure of LV-2864A&B,The most notable include:

1.     Organotin and other organometallic compounds.

2.     Silicone,Rubber containing organotin catalyst.

3.     Sulfur,polysulfieds,polysulfones and other sulf-containing materials.

4.     Amines,urethanes and amine-containing materials.

5.     Unsaturated hydrocarbon plasticizers.