ACC appeals against California spray foam priority product designation

Chemical Watch | January 07, 2019

The American Chemistry Council has filed a formal appeal to get California’s Department of Toxic Substances Control (DTSC) to withdraw its designation of spray polyurethane foam (SPF) systems as a priority product under the Safer Consumer Products programme. In a 2 January letter to the director of the DTSC, the ACC initiated the formal appeal process, reiterating an earlier request for the agency to withdraw the designation. Under the SCP scheme, manufacturers of designated product-substance pairs are required to either complete an alternatives analysis to determine if a safer replacement is available, or reformulate to avoid the substance’s use. Last year California designated SPF systems containing unreacted methylene diphenyl diisocyanates (MDI) its second priority product. In 2017 it had announced children’s foam-padded sleeping products containing flame retardants TDCPP or TCEP as the first product. However, as the marketplace had already phased the substances' use out, this resulted in no notifications.

Spotlight

The National Academy of Sciences (NAS) issued three ground breaking reports over the past few years, but their major recommendations that the U.S. Environmental Protection Agency (EPA) as well as other government agencies such as the U.S. Food and Drug Administration (FDA) should make several changes to strengthen their toxic chemical risk assessments have not been heeded.

Spotlight

The National Academy of Sciences (NAS) issued three ground breaking reports over the past few years, but their major recommendations that the U.S. Environmental Protection Agency (EPA) as well as other government agencies such as the U.S. Food and Drug Administration (FDA) should make several changes to strengthen their toxic chemical risk assessments have not been heeded.

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SOCMA's Specialty Insights Highlights Industry's Adaptability and Agility

SOCMA | October 09, 2020

Society of Chemical Manufacturers & Affiliates (SOCMA) is pleased to announce the release of the third issue of the association's semi-annual publication. Written and developed specifically for the specialty and fine chemical value chain, this edition, "Charting the Course for 2021," showcases the journey of the industry during this unprecedented year. "SOCMA is proud to deliver this latest issue reflective of the adaptability, agility and ambition of this innovative industry," said SOCMA President and CEO Jennifer Abril. "Across industry sectors, companies are solving challenges and providing solutions with resilience and resourcefulness, as echoed through these pages."

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CHEMICAL MANAGEMENT

SEKISUI CHEMICAL Develops Transparent and Flexible Radio Wave Reflection Film for 5G Communications

SEKISUI CHEMICAL CO., LTD. | January 06, 2022

SEKISUI CHEMICAL CO., LTD. is pleased to announce that its High Performance Plastics Company has developed a transparent and flexible type of radio wave reflection film for 5G communications by combining SEKISUI's distinguished film and optical adhesive technologies with the metamaterial technology of Meta Materials Inc. headquartered in Canada. SEKISUI verified the radio wave environment of the film with collaboration from DOCOMO Innovations, Inc. headquartered in the U.S. and confirmed that the product, having unprecedentedly high transparency and radio wave diffusion characteristics, provides wide frequency coverage useful for 5G and 6G communications. Background of the development In 5G and 6G radio wave communications, higher frequency ranges than conventional LTE (4G) services are used: Sub-6 and millimeter wave ranges. Millimeter waves feature a high transmission capacity but have strong directivity; when reaching a shielding object such as a building, they attenuate, deteriorating communications quality. Installing a base station or relay station may resolve the deterioration, but such a solution involves a high additional investment, and a more reasonable cost solution was demanded. While millimeter wave reflection plates, which have a metamaterial copper pattern processed on the printed circuit board, have been developed as a possible measure for solving such a challenge, SEKISUI directed attention to transparent and flexible radio wave reflection film that would have a metamaterial structure and would not spoil the landscape. Believing that it would be able to provide a solution by incorporating its film and optical adhesive material technologies into such a transparent, flexible plate, SEKISUI has been committed to research and development efforts. The company has realized a transparent and flexible type of high-frequency radio wave reflection film, which can be used for not only millimeter wave ranges but also a wide band ranging from 2 GHz to 60 GHz while featuring a total luminous transmittance of 95% by integrating SEKISUI's technologies with Meta's world-leading nano-patterned transparent metamaterial technology NANOWEB (R) (*1) and its manufacturing technology RML (R) (*2). Product outline This film consists of a metamaterial layer that has a high-frequency radio wave reflection structure, highly transparent adhesive, special coating that protects the film surface, and a special adhesive layer. When placed on a surface such as a wall or ceiling, the film reflects radio waves, enabling them to reach shielded areas. This technology can improve a communications environment at a lower cost and in a shorter period of time, compared with the installation of a base station or relay station. The film, which is transparent and flexible and does not require a power connection, can be installed anywhere, on a surface of whatever shape, without spoiling the appearance of a place where it is installed. Effect demonstration experiment Using the simulation technology of DOCOMO Innovations, Inc., SEKISUI verified the effects of the product at the planning stage and confirmed the effects indoors in the Solution Co-creation Lab of MIRAIT Corporation headquartered in Tokyo. The demonstration experiment confirmed that a sheet of reflection film placed 30 meters away from the base station properly controls the reflection of radio waves, thus improving the communications infrastructure across a wide area. Future plans Using the advantages of transparency, flexibility, light weight and operation without power connection, SEKISUI plans to distribute the product for use in office buildings, factories, shopping malls, medical and care facilities, various sports facilities, farms, ranches, smart cities, underground shopping streets, rolling stock and roadway infrastructure while exploring other applications, including temporary or emergency sites providing first-aid services, construction sites, and camping areas. SEKISUI plans to start distributing sample products in fiscal 2022, aiming to achieve a sales target of 6 billion yen by fiscal 2026.

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CHEMICAL TECHNOLOGY

Chemical compounds in foods can inhibit a key SARS-CoV-2 enzyme

SARS | December 01, 2020

Substance mixes in nourishments or drinks like green tea, muscadine grapes and dull chocolate can tie to and block the capacity of a specific protein, or protease, in the SARS-CoV-2 infection, as indicated by another examination by plant scientists at North Carolina State University. Proteases are essential to the wellbeing and practicality of cells and infections, says De-Yu Xie, educator of plant and microbial science at NC State and the comparing creator of the examination. In the event that proteases are restrained, cells can't perform numerous significant capacities - like replication, for instance. "One of our lab's centers is to discover nutraceuticals in food or therapeutic plants that restrain either how an infection appends to human cells or the engendering of an infection in human cells," Xie said. In the examination, the NC State scientists performed both PC reproductions and lab considers indicating how the alleged "fundamental protease" (Mpro) in the SARS-CoV-2 infection responded when stood up to with various diverse plant synthetic mixes definitely known for their strong mitigating and cancer prevention agent properties. "Mpro in SARS-CoV-2 is required for the virus to replicate and assemble itself," Xie said. "If we can inhibit or deactivate this protease, the virus will die." Computer simulations showed that the studied chemical compounds from green tea, two varieties of muscadine grapes, cacao powder and dark chocolate were able to bind to different portions of Mpro. "Mpro has a portion that is like a 'pocket' that was 'filled' by the chemical compounds," Xie said. "When this pocket was filled, the protease lost its important function." In vitro lab experiments completed by Yue Zhu, an NC State Ph.D. student in Xie's lab, showed similar results. The chemical compounds in green tea and muscadine grapes were very successful at inhibiting Mpro's function; chemical compounds in cacao powder and dark chocolate reduced Mpro activity by about half.

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