La description

LSR***7 Liquid Silicone Rubber

Product Description:
This product is made of high temperature curing two-component addition type liquid silicone rubber, designed specifically for precision mold fabrication, and fiber glass sleeving coating. After curing have the dimensional stability, good release properties, tear-resistant high strength, low linear shrinkage, excellent ozone and UV aging resistance, non-toxic, tasteless, and has good biocompatibility. This product is easy to use, compound viscosity is moderate, high temperatures can be quickly cured.

Characteristics after curing:

    Quick curing at high temperature, easy to use; 
    Addition-curing, does not release any gases;
    Superior mechanical properties, low linear shrinkage;
    Excellent ozone and ultraviolet resistance;
    Excellent electrical properties, good chemical stability;
    Moisture-proof, waterproof, resistant to ozone, weather-resistant;
    Fire resistance UL*4V*0 grade.

Typical Properties:

Testing Item    Testing standard    Unit    A    B
Outside view    visual inspection    **-    Red or black viscous liquid    clear viscous liquid
viscosity    GB/T *********8    mPa•s（*5℃）    *****0    ***0±**0
density    GB/T *******2    g/cm3（*5℃）    1.*0    0.*9

Operation process:

Testing item    Unit or conditions    Value
mixing ration    weight ratio    **0：*0
mixing ration    volume ratio    **0：*1.1
Mixed viscosity    mPa•s（*5℃）    *****0±****0
Mixture density    g/cm3（*5℃）    1.*0
operating time(1)    hr（*5℃）    ≥*8
Curing time    â„ƒ/min    **0/*0
Operation time is a quantity of cement with **0 g.

Operation caution:

    Products can be added solvent used as coating products. Recommended by the solvent are toluene, xylene, and petroleum ether. When you use Mix part A and solvent evenly, and then add the part B, continue to stir well before use. On the fiberglass casing is preferred recommend using xylene as solvent, adding amount is *0% of the Agent A.
    Mixing should pay attention to the same direction, otherwise, it will stir with too much bubble; Borders and the bottom of the container sizing material should also stir well, can appear otherwise stir caused by uneven local not curing phenomenon.
    Casting the product vacuum pumping, remove again bubble can improve after curing products comprehensive performance.
    Low temperature will cause the curing slowly, if necessary can improve the heating temperature or prolonged curing time. Also can improve the amount of curing agent to shorten curing time.
    LSR***8 with contain N, S, P element of compounds and some heavy metal ion compounds, will appear difficult contact curing or not curing phenomenon. These heavy metal ions including Sn, Pb, Hg, Bi, As, etc.

Typical performance:

Testing item    Testing standard    Unit    Value
hardness    GB/T **1.*****8    Shore A    *5±4
elongation at break    GB/T *******8    %    ≥**0
Tensile Strength    GB/T *******8    Mpa    ≥3.5
conductivity factor    GB/T *********8    W/mK    0.*7
expansion coefficient    GB/T *********6    μm/（m，℃）    **0
water absorption    GB/T ********5    *4h，*5℃，%    0.***0.*2
tear strength    GBT *******8    kN/m    ≥*5
dielectric strength    GB/T ********7    kV/mm（*5℃）    >*5
loss factor    GB/T ********7    ï¼ˆ1MHz）(*5℃)    0.**1
dielectric constant    GB/T ********7    ï¼ˆ1MHz）(*5℃)    0.*3
volume resistance    GB/T ******2    ï¼ˆDC**0Vï¼‰Ω• cm    1.2×***5
Remark：All the above data come from **0℃/*0 mins cured and put 2 hours at room temperature(*5℃)

Packing:

Agent A: *0kg, Agent B: 2kg

Storage and Transport:

    Cool dry place for storage, storage period for 1 year. (*5℃)
    This product is non-dangerous goods, according to the General chemical transportation.
    Colloidal components A and B shall be sealed, and care during transport leaked.
    Over shelf products should confirm that there is no exception before use.