Low Refractive Index Coating, Adhesive and Encapsulant
n-1.32 - 1.48

MY Polymers leads the field in development of low refractive index materials (n=1.32 to 1.48) for optical adhesives, optical cladding & coating materials and optical encapsulation materials. They have a wide selection of UV Cured products. These low refractive materials are also available as moisture cured and pressure sensitive products.

MY Polymers manufactures low RI optical adhesives that are used for encapsulation, adhesion and cladding in various photonics applications, including:

• fiber lasers pump combiners
• couplers
• optical fiber connectors
• light guides
• fiber recoating and more.

They also make other products that cover the whole range of RI from 1.32 to 1.49. Some of these products, and particularly the products in the range of 1.46-1.47, are made to match the RI of optical materials such as glass and fused silica and are characterized with very high strength and very strong adhesion to both glass and plastics.

Application Notes:  Applications  | Bio-medical  |  Liquid Repelling

The MY-130 Series of UV cured materials starting with n=1.32 offers the best available Critical Angles,

• desirable for a variety of encapsulant, light guide and cladding applications.

The MY-133 and MY-132 are used for encapsulation of laser pump combiners, optical fiber splitters, couplers, Fiber Optic Connectors, V-Groove Light Guides, etc. to reduce light leakage.

• The 1.33 materials match the refractive index of water which enables multiple bio-medical and bio-photonics applications.

MY-132 & 132A with n=1.32 improve significantly the critical angle and the NA.

• Low modulus encapsulants through elastomeric higher viscosity cladding materials and up to the high modulus 1.375 materials.

MY-133 V-2000 & 1375 V-2000 are formulated specifically for Vytran re-coating systems.

MY-133MC is moisture cured for large open surfaces, spin coating (See Technical Notes below).

　

The MY-140 Series are based on special tough resins which were developed over a 10 year period for demanding applications of the Israeli Military.

• They exhibit excellent adhesion to glass and other substrates.

MY-145 to MY-147 series are clear tough UV curable acrylic-urethane materials which have a refractive index of 1.45 -1.47 (cured).

• They are supplied with a range of hardness from soft elastomeric gels to a high modulus and high Tg materials.
• Excellent adhesion to various substrates including glass, ceramics, oxides, metals and plastics.

The OF Series products were designed specifically for cladding of Optical Fibers and compatibility with Drawing Towers.

• The OF-133 (n=1.33) enables a breakthrough in the Numerical Aperture of High NA Optical Fibers.
• OF-133 and OF-1375 represent a series of products designed specifically for cladding of Optical Fibers.

The QH Series targets Cladding for Light Guides in LCD BLU, Automotive Instrumentation Panels, and Solar PV Concentrators.

The PS-133 is a pressure sensitive adhesive that can be coated on optical substrates to bond optical laminates, retro-reflective films and tapes.

MY Polymers Low Refractive Index Coatings Selector

Product	Cured RI @589nm	Cured RI @950nm	Viscosity cps	Elastic Modulus, mPa	% Elongation	Tensile Strength, mPa	Special Feature
MY-130 Series	UV curable (except as noted) for optical fibers
MY-131 MC	1.312	1.308	120	very soft solid			Moisture Cure for large open surfaces;  spin coating
MY-132	1.324	1.32	200	2.5	10		n=1.32 improves significantly the critical angle and the NA
MY-132A	1.326	1.322	2600	0.4	80	0.3
MY-132 V15K	1.327	1.322	14500	v. low
MY-132 MC	1.319	1.315	200	soft solid			Moisture Cure for large open surfaces;  spin coating
MY-133	1.336	1.332	700	4	12	0.4	R/I identical to water / body tissue
MY-133 V-2000	1.333	1.329	2-3000	4.5	40	1.2	Ideal for Vytran re-coating systems
MY-133 V-5000	1.344	1.34	4500	3.6	54	1.8	Higher viscosity version
MY-133 MC	1.33	1.325	400	soft solid			Moisture Cure for large open surfaces, spin coating
MY-133 EA	1.331	1.33	2800	4	45	1	Improved adhesion to glass, especially in high humidity
MY-136	1.365	1.361	700	11	83	4.7	Re-coating of optical fibers
MY-136 V-2000	1.369	1.363	2350	92	28	6.6
MY-1375	1.378	1.374	4000	125	28	9.5
MY-1375 V-2000	1.379	1.375	2000	110	40	9	Ideal for Vytran re-coating systems
MY-139	1.391	1.386	2300	190	38	11.3

　

MY-133 Primers

Impoves adhesion of MY-130 Series

　

Product	Cured RI @ 589nm	Cured RI @ 950nm	Viscosity cps	Elastic Modulus, mPa	% Elongation	Tensile Strength, mPa	Special Feature
MY-140 Series	UV curable for glass, ceramics oxides, metals and plastics
MY-142	1.42		1050	5.3	100	3.7	Strong optical adhesive Developed initially for military applications
MY-142B	1.42		600	525	9.5	21
MY-143	1.435		1200
MY-145	1.45		630	300	150	11.4
MY-146	1.4607		270	515	22	17.4
MY-1465	1.465		235	160	140	10.6
MY-147	1.47		500	270	175	11.6
MY-1473	1.4738		290	555	90	15
MY-148	1.479		320	580	90	16.7
MY-149	1.492		1000

　

OF Series	For Optical Fiber Cladding & Coating
	Cured RI @589nm	Cured RI @950nm	Viscosity cps	Elastic Modulus, mPa	% Elongation	Tensile Strength, mPa	Special Feature
OF-133	1.334	1.33	2100	2.5	50	0.8	For Optical Drawing Towers Require inert atmosphere Greatly improves NA of high NA fibers
OF-134	1.344	1.34	2900	5.4	50	1.7
OF-136	1.369	1.363	2200	78	35	6
OF-136N	1.369	1.363	2400	53	52	6
OF-137	1.373	1.368	3300	120	48	8
OF-1375A	1.377	1.372	4000	155	43	8.5
OF-1375N	1.379	1.375	4000	105	50	10
OF-138N	1.388	1.382	3500	275	62	13
OF-139N	1.391	1.386	3500	350	40	11.5
OF-140N	1.407	1.401	3800	560	32	17

　

PS Series	Pressure Sensitive Optical Adhesives for Lamination
	Cured RI @ 950nm	Type	% Solids	Viscosity cps	Special Feature
PS-133	1.33	Solvent	35%	2000-5000	Pressure sensitive adhesive that can be used to bond optical layers, retro-reflective films and tapes
PS-133-100	1.33	Hot Melt	100%	40K-80K@100?C

　

QH-40 & 40A

Bonding layers in LCD Back light Units (BLU)

　

MY Polymers also offers cost effective and short development time for customized products.

Technical Notes:
Detailed Product Properties
Curing, Inerting, Adhesion Promotion and Adhesion Primers
Curing Options
Spin Coating & Solvents for MY-133MC
Inerting and Adhesion Issues
MY-133 Refractive Index vs. Wavelength
Transmittance of MY-130 Series Coatings