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On April 7, 2026, South Korean specialty chemicals company SP Sanhe (SP Samhwa) announced a major technological breakthrough and has successfully developed two domestic patents related to "manufacturing method of high-purity optical polyurethane resin".
On April 7, 2026, South Korean specialty chemicals company SP Sanhe (SP Samhwa) announced a major technological breakthrough, has successfully developed two domestic patents related to "manufacturing method of high-purity optical polyurethane resin", and officially launched commercial mass production.
relying on the support of the "Material and Component Technology Development Plan" of the Ministry of Industry, Trade and Resources (MOTIE) of Korea, SP Sanhe has successfully overcome the production difficulties of high-purity optically cured polyurethane materials after five years of research and development. As a cutting-edge technology in the field of optical materials, the product is mainly used in core scenarios such as optical films, high-performance adhesives, lenses and electronic materials for electronic devices such as smartphones, and is a key raw material for the manufacture of high-end displays and electronic devices.
SP Sanhe explained that traditional polyurethane curing agents have inherent defects in transparency, color stability and adhesion due to chemical structure limitations, and are prone to yellowing problems, making it difficult to maintain transparency for a long time. The SP3 and the newly developed high-performance optical curing agent, through the core process optimization, minimize the yellowing phenomenon, and achieve long-term high transparency, the perfect solution to the above industry pain points.
In addition, the company has also developed innovative temperature control technology that uses acetate-based compounds to precisely control the heat generated by the polyurethane reaction during the production process. At the same time, through the multi-stage thin film distillation process to remove impurities, the final realization of 99.5% and above ultra-high product purity, to meet the stringent standards of high-end optical field.
A person in charge of SP Sanhe said that this technological breakthrough successfully realized the localized replacement of core materials imported from Japan, effectively solved the problem of dependence on South Korea's advanced industrial supply chain, and firmly established technological autonomy and global leading position. In the future, the company plans to further expand its business scope from the domestic market to the global market, and fully seize the share of international high-end optical polyurethane resin.
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