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Dow Silastic Moldable Silicone: The solution for LED lens manufacturing (Adaptive Driving Beam)

Publié le 2021-02-18

Dow Optical Silicones SILASTIC™ Moldable silicone solution for Adaptive Driving Beam 

Optical silicones are used to manufacture primary lenses with multi-segment LED light sources for adaptive high beam (ADB) to improve driver and road safety. ADB technology allows drivers to keep their high beams on at all times because the system automatically adjusts the intensity according to changing traffic and road conditions.

Dark or low-light conditions increase the likelihood of a collision. Driving in darkness accounts for 25% of car trips, but 52% of driver fatalities and 71% of pedestrian fatalities.

Potential solutionsLimitations / Disadvantages 
Increase road lighting Reflect and reflections, necessary infrastructures
Increasing the use of drivers' headlights  Glare and anxiety for the drivers in front
ADB: Adaptive driving beam Long-distance visibility without causing discomfort, distraction or glare

Discover in video the range SILASTIC™, the silicone Moldables from Dow :


In this case, SILASTIC MS-1002 makes it possible to produce complex ADB lenses.

LED lighting for streets and roads :

VS Lighting (VosslohSchwabe Baden-Wuerttemberg, Germany) has designed a cost-effective module with high ingress and impact protection ratings (IP67, IP69K, IK08). The optical silicon and silicone adhesive used in the LED module feature high resistance to UV light and external shock. It is important to note that PDMS-based materials are permeable to volatile organic compounds (VOCs), thus avoiding contamination of the LED chip or its light conversion phosphor layer.
 

Outdoor automotive applications :

SoundOff Signal (Hudsonville, MI) designed an LED lighting module for emergency vehicles using two optical LSRs. Here, the specially designed clear lens is molded from SILASTIC MS-1002 moldable silicone. This lens is then co-molded with SILASTIC MS-0002 moldable silicone to form the housing. The LED module has a small footprint with "maximized candela output", exceptional resistance to damage such as gravel pitting, improved sealing performance to prevent water ingress, and high UV and photothermal stability to prevent lens yellowing.

Discover the characteristics of SILASTIC optical silicones and ask for your sample :

SILASTIC™
MS-0002
Moldable
Silicone

SILASTIC™
MS-1001
Moldable
Silicone**

SILASTIC™
MS-1001
Moldable
Silicone**
SILASTIC™
MS-1003
Moldable
Silicone
SILASTIC™
MS-4002
Moldable
Silicone
SILASTIC™
MS-4007
Moldable
Silicone
SILASTIC™
MS-2002
Moldable
Silicone

Color

Translucent  Optically clear Optically clear Optically clear Optically clear Optically reflecting White clear 
Viscosity (part A), cP 148 000 20 000 40 000 52 000 50 000 28 000 695 000
Viscosity (part B), cP 145 000 9 000 18 000 37 500 21 000 9 500 565 000
Viscosity  (mixed*), cP - 14 000 26 250 42 300 25 000 10 500 -
Working time at 25°C (pot life), hours 48 30 48 48 48 48 48
Specific gravity, kg/l 1,14 1,05 1,07 1,05 1,08 1,08 1,44

Durometer, Shore A

(psi)

(MPa)

65

87 72 51 84 70 84

1 300

1 740 1 625 800 1 700 1 700 1 250

9,0

12,0 11,2 5,5 11,7 11,7 8,6
Elongation, % 270 50 80 325 60 100 65
Linear CTE, ppm/°C 280 250 275 325 250 270 210

Luminous transmittance***

75% à 450 mm
89% ) 760 mm

92% à 10 mm
90% à 25 mm
84% à 50 mm
76% à 100 mm

90% à 10 mm
84% à 25 mm
75% à 50 mm
59% à 100 mm
92% à 10 mm
89% à 25 mm
85% à 50 mm
77% à 100 mm
93% à 10 mm
90% à 25 mm
86% à 50 mm
79% à 100 mm
93% à 10 mm
91% à 25 mm
87% à 50 mm
80% à 100 mm
N/A
Refractive index (nD,589-3 nm) N/A 1,418 1,413 1,409 1,417 1,413 N/A
Abbe number, a.i.
Dielectric strength
N/A
500
48
736
52
584
51
508
52
711
51
650
N/A
525
Dielectric strength (kV/nm) 19,7 29 23 20 28 25,6 20,7
Volume resitivity, ohm,cm - - 1.00E+18 1.00E+16 1.00E+14 1.00E+14 3.00E+15
Agency listing UL94
UL94 746A
UL94
UL94 746A
AMECA
UL94
UL94 746A
UL746C(f1)(f8)
AMECA
UL94
UL746A
UL 746C(f1)(f8)
UL94
UL746A
UL 746C(f1)(f8)
UL94
UL746A
UL 746C(f1)(f8)
UL94
UL746A
UL 746C(f1)(f8)

*mix ratio 1:1
**CV grade
*** Weighted total transmittance between 360 and 780 nm according to CIE Colorimetry 15:2004

More information

Need information on moldable silicones or SILASTIC™  ? Contact our technical department on +33 426 680 680 or fill in our Contact form.

In addition you can download LED Lighting product selector guide by DOW :