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Bisphenol A (BPA) is a chemical compound primarily used in the manufacturing of various plastics. It is a colourless solid which is soluble in most common organic solvents , but has very poor solubility in water.
Exceptions include bisphenol S, P, and M. "Bisphenol" is a common name; the letter following denotes the variant, which depends on the additional substituents. Bisphenol A is the most popular representative of the group, with millions of metric tons produced globally in the past decade, often simply called "bisphenol".
Epoxy resins derived from bisphenol A are used as coatings on the inside of almost all food and beverage cans; [13] however, due to BPA health concerns, in Japan epoxy coating was mostly replaced by PET film. [14] Bisphenol A is a preferred color developer in carbonless copy paper and thermal point of sale receipt paper.
Bisphenol A diphenyl phosphate is a halogen-free flame retardant used plastics. It is used in polymer blends of engineering plastics, such as PPO/HIPS and PC/ABS, [1] which are commonly used to make casing for electrical items like TVs, computers and home appliances. It is formed by the transesterification of bisphenol A with triphenyl phosphate.
Aleksandr Pavlovich Dianin (Russian: Александр Павлович Дианин; 20 April 1851 – 6 December 1918) was a Russian chemist from Saint Petersburg.He carried out studies on phenols and discovered a phenol derivative now known as bisphenol A [1] [2] and the accordingly named Dianin's compound. [3]
Bisphenol A diglycidyl ether slowly hydrolyzes to 2,2-bis[4(2,3-dihydroxypropoxy)phenyl)propane (bis-HPPP). Similarly, DGEBA reacts with acrylic acid to give vinyl ester resins . The reaction results in opening of the epoxide ring, generating unsaturated esters at each terminus of the molecule.
QI was given a full series after BBC executives responded well to a nonbroadcast pilot [3] and the first episode, "Adam" premiered on BBC Two on 11 September 2003. [4] From the second to the fifth series, episodes aired each week on BBC Two; the second and subsequent episodes were shown first on BBC Four in the time-slot after the previous ...
The episodes are produced by AIC and GONZO, directed by Yoshikazu Miyao and composed by Jukki Hanada. Characters are adapted from the manga drawn by Maki Minami. It is currently airing in Japan on Chiba TV and various other stations. Broadcast on Chiba TV began on 6 April 2008 and continued for 24 episodes, ending on 14 September 2008.