MY-133V2000 is characterized by an ultra low refractive index of 1.33 (in the cured state).

MY-133V2000 was built especially to answer the need for a very low RI encapsulating material. It cures to a clear low modulus solid that can be cured to a depth of a few millimeters by the action of radiation sources at 300-400nm. It is useful as a coating material and for the encapsulation of various optical components such as optical fibers, light-guides, lenses and other components where the enhancement of total internal reflection is the issue. For more details see the data sheet for MY-133V2000. The MY-133V2000 is our recommended n=1.33 product. A Typical relationship of refractive index vs. wavelength is shown in Refractive Index of MY-133.

MY-133 which is our first marketed low RI product is still being offered but is being gradually replaced by MY-133V2000 due to its better mechanical properties.

For better adhesion special Primers can be used.

MY-132 and MY-132A are the newest addition and the lowest refractive index on our list. They have an RI of 1.320 in the cured state at the near IR (900-1000 nm). MY-132 is a low viscosity product with a low modulus. MY-132A has an even lower modulus and better adhesion properties. It is better suited for use inside enclosures such as a glass ferule.

Another product in the 1.32 range is QH-40 which is a low modulus resin with a better adhesion than that of the other MY-132 and MY-133 range of products. It has the qualities of a pressure sensitive adhesive. It is useful as a low RI lamination adhesive for PET, polycarbonate and other surfaces.

A non-UV curable material with the same low refractive index of 1.33 is available as a moisture curable MY-133MC. It is characterized by better adhesion and better mechanical strength than that of the UV curable versions. In addition it does not need inerting and requires no radiation equipment. See details in the Data Sheet for MY-133MC.

MY-136 and MY-1375V2000 are medium viscosity adhesives and coating materials which are designed for bonding, encapsulation and coating applications. As their name suggests, they cover the range of RI of 1.36-1.38. In general they exhibit better adhesion and better mechanical properties than the MY-133 series.

MY-145 to MY-147 series are tough UV curable acrylic-urethane materials which are characterized by a refractive index of 1.45 -1.47 (cured) and which can be supplied with a range of hardness from soft elastomeric gels to a high modulus and high Tg materials. All of which are characterized by a very high adhesion to various substrates including glass, ceramics, oxides, metals and plastics. Typical properties can be seen in the PRODUCT SELECTOR GUIDE.

MY-145 to MY-148 are made to match the refractive index of fused quartz and glasses and are available in a number of grades.

MY-142 is an intermediate product between MY-133 and MY-145 with a refractive index of 1.42. It has good adhesion to most substrates although not as good as the higher refractive index products. It is available in both soft (MY-142) and rigid (MY-142B) grades.