3,3′-Diaminodiphenyl sulfone is used as a curing agent for epoxy resin and also an important monomer for polysulfonamide fiber (PSA).
Author Archives: Showa America
EL-Ammonium Tartrate, the ammonium salt of tartaric acid, is used in such applications as cell culture and chromatography. Ammonium tartrate has been used to displace sodium for the analysis of a modified oligonucleotide by matrix-assisted laser desorption/ionization post-source decay (MALDI-PSD). It is also utilized in electron spin resonance (ESR) dosimetry research, and has been probed […]
OPA (Ortho-Phthalaldehyde) is a quick and effective high-level disinfectant used on a wide variety of semi-critical, heat-sensitive medical devices in medical facilities all over the world. OPA is very effective against a wide range of microorganisms and has a near neutral pH level. The CDC website compares characteristics of selected chemicals (including OPA) used as […]
Ortho-phthalaldehyde (OPA) received clearance by FDA in October 1999. OPA solution is a clear, pale-blue liquid (pH, 7.5), which typically contains 0.55% OPA. OPA has demonstrated excellent microbiocidal activity in in vitro studies[2,3]. For example, it has shown superior mycobactericidal activity (5-log10 reduction in 5 minutes) compared with glutaraldehyde. The mean time required to effect […]
What is Prepreg? Composite components now account for up to 85% of today’s Formula 1 cars, but only roughly 20% of the weight. An achievement only made possible by continuously exploiting and developing the capabilities of carbon fiber to manufacture intricate parts. These are built by laying up individual plies of carbon fiber prepreg on […]
Carbon fiber composites (also called carbon-fiber reinforced plastics or CFRP) are finding their way into new applications as industries demand materials with ever-higher strength-to-weight ratios, corrosion resistance, and workability. Over the past 60 years, CFRPs have been increasingly used to replace metal in applications where light weight has outsized value (capable of supporting prices that […]
Carbon Fiber Reinforced Polymer Composites (CFRP) are lightweight, strong materials used in the manufacturing of numerous products used in our daily life. It is a term used to describe a fiber-reinforced composite material that uses carbon fiber as the primary structural component. It should be noted that the “P” in CFRP can also stand for […]
The main characteristic of thermosets (literally setting under heat) is that they require curing, when they undergo a molecular cross-linking process which is irreversible and renders them infusible. They therefore offer high thermal stability, good rigidity and hardness, and resistance to creep. This also means that, once cured, the resin and its laminate cannot be […]
Tartaric acid is a white crystalline diprotic organic acid. It occurs naturally in many plants, particularly grapes, bananas, and tamarinds, and is one of the main acids found in wine. It is added to other foods to give a sour taste, and is used as an antioxidant. Salts of this material are known as tartrates. […]
3,3′-DDS and 4,4′-DDS can be used to formulate structural materials (advanced composite materials) including carbon fiber, specialty reinforcements, resins, honeycomb, adhesives, engineered honeycomb composite structures, and prepregs (and other fiber-reinforced matrix materials). Both 3,3′-DDS and 4,4′-DDS have assay of 99% min.