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n Functional Polymer Group
phone: +81-3-3347-9613(Tokyo)

Developmental and technical information

Sekisui's Techpolymer is an indispensable part of the LCD for personal computers and televisions, and the screens of rear projection televisions. The uniform light diffusion effect from the spherical particles helps make the entire display brighter and easier to see.


Techpolymer, which decreases loss of whole light transmittance and increases haze, can be used in areas requiring high optical property. Image of light diffusion
Image of light diffusion
To meet customer's demand of optical property, we are developing new lines with a different refractive index and solvent resistance.
Recommended lines
MBX series
SMX series
SBX series
Techpolylmer including plate
Techpolylmer including plate
Techpolylmer free plate
Techpolylmer free plate


Q & A Inquiry

Optical properties of molded plate (Example of use)

The products retain higher hazes, but yet higher light transmissions, compared with inorganic particles.

n Haze (%) of molded plate

Diffusing agent Amount of diffusing agent
1% 2% 3%
MBX-5 12.9 14.9 20.4
SBX-6 98.7 99.1 99.2
Calcium carbonate 98.9 99.2 99.3
* The data are examples of measurements.

n All light transmittance of molded plate

Diffusing agent Amount of diffusing agent
1% 2% 3%
MBX-5 90 89.7 89.4
SBX-6 74.5 68.0 63.0
Calcium carbonate 63.2 57.7 53.9
Measurement: injection molded plate (Thickness of 2 mm)
Refractive index of base material: PMMA 1.49

Main grade

n MBX series

Composition: Cross-linked polymethyl methacrylate
True specific gravity: 1.20
Refractive index: 1.49
Heat resistance: 250 - 270 ºC
Grade Mean particle size
(μm)
Degree of cross-linking
MBX-5 5 Standard
MBX-8 8 Standard
MBX-12 12 Standard
MBX-15 15 Standard
MBX-20 20 Standard
MBX-30 30 Standard
MBX-40 40 Standard
MBX-50 50 Standard
MB20X-5 5 Medium
MB20X-30 30 Medium
MB30X-5 5 High
MB30X-8 8 High
MB30X-20 20 High

n SBX series

Composition: Cross-linked polystyrene
True specific gravity: 1.06
Refractive index: 1.59
Heat resistance: 250 - 270 ºC
Grade Mean particle size
(μm)
Degree of cross-linking
SBX-6 6 Standard
SBX-8 8 Standard
SBX-12 12 Standard
SBX-17 17 Standard

n MSX series

This series includes refractive index-adjusted grades.
Customer's requests for refractive index and particle size can be met.

n MBX-S series

MBX-S series has sharper particle size distribution compared to MBX series. This can be used for a variety of applications because of high heat- and solvent-resistance.
Composition: Cross-linked polymethyl methacrylate
True specific gravity: 1.20
Refractive index: 1.49
Heat resistance: 250 - 270 ºC

n MBX-SS series

MBX-SS is monodisperse polymer particles with a sharper size distribution than MBX-S series.This can be used for a variety of applications because of high heat- and solvent-resistance.
Composition: Cross-linked polymethyl methacrylate
True specific gravity: 1.20
Refractive index: 1.49
Heat resistance: 250 - 270 ºC


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