Development of Plant-derived High Refractive Index Lens Material "Do Green™"
Mitsui Chemicals, Inc.
Mitsui Chemicals, Inc. (Tokyo: 4183; President & CEO: Tsutomu Tannowa) announced the successful development of "Do Green™", a bio-based high refractive index lens material using plant-derived material.
Mitsui Chemicals developed this lens monomer MR-160™ (refractive index 1.60) using its new and unique aliphatic isocyanate-derived biomass, STABiO™ PDI™. The Company acquired certification for the monomer as a biomass-derived product in both Japan※1and the United States※2.
The Company also received the same certification for its ultra-high refractive index lens monomer MR-174™ (refractive index 1.74).
【Biomass certified products】
|(Refractive index of 1.60）||JORA Biomass 30 - 40％※3(Certified March 2014）||USDA Biomass 57％※4(Certified September 2014）|
|(Refractive index of 1.74）||JORA Biomass 30 - 40％※3(Certified December 2014）||USDA Biomass 82％※4(Certified October 2014）|
※1JORA (Japan Organics Recycling Association): Provides biomass certification to environmentally friendly products using biomass and which meet certain quality and regulatory standards.
※2USDA Certified Bio-based Products: The United States Department of Agriculture gives “USDA BioPreferred®” certification to products derived from plants and other renewable agricultural, marine, and forestry materials which give an alternative to conventional petroleum derived products.
※3Ratio of fossil fuel-derived carbon and biomass-derived ingredients
※4Ratio of fossil fuel-derived carbon and biomass-derived carbon tested by ASTM-D6866-12 (standard test for determining bio-based content of solid, liquid, and gaseous samples using carbon-14 radiocarbon analysis)
The Mitsui Chemicals Group will continue research and development of biosynthesis and plant culture technology, such as polymers derived from plants, as a solution provider committed to finding new sustainable processes and materials. The Company will continue to develop plant-derived materials including not only ophthalmic lens materials but also applications such as coating materials and adhesives while pursuing realization of a cohesive society in harmony with the environment.