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

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 solutions	Limitations / 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)