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The Significant New Alternatives Policy (also known as Section 612 of the Clean Air Act or SNAP, promulgated at 40 CFR part 82 Subpart G) is a program of the EPA to determine acceptable chemical substitutes, and establish which are prohibited or regulated by the EPA. [1]
Tetrabromobisphenol A diglycidyl ether is an epoxy resin consisting of tetrabromobisphenol A with ether linkages to two epichlorohydrin groups. An alernative structural comparison is as brominated form of bisphenol A diglycidyl ether. It is a brominated aromatic chemical used principally for giving flame retardant properties to materials. [1]
[12] [13] From the 1990s onward, concern has been raised over the use of BADGE-based epoxy resins in the lining of some cans for foodstuffs, with the chemical being found to leach into foods. [ 12 ] [ 14 ] Bisphenol A Diglycidyl ether-based epoxy coatings are extensively used for coating the inside of cans which come into contact with food and ...
The epoxy value is defined as the number of moles of epoxy group per 100g resin. So as an example using an epoxy resin with molar mass of 382 and that has 2 moles of epoxy groups per mole of resin, the EEW = 382/2 = 191, and the epoxy value is calculated as follows: 100/191 = 0.53 (i.e. the epoxy value of the resin is 0.53). [6]
New Source Performance Standards (NSPS) are pollution control standards issued by the United States Environmental Protection Agency (EPA). The term is used in the Clean Air Act Extension of 1970 (CAA) to refer to air pollution emission standards, and in the Clean Water Act (CWA) referring to standards for water pollution discharges of industrial wastewater to surface waters.
As the molecule has 3 oxirane functionalities, it is a reactive modifier and viscosity reduction agent of epoxy resins. [7] These reactive diluent modified epoxy resins may then be further formulated into CASE applications: Coatings, Adhesives, Sealants, and Elastomers. [8]
A key use is modifying the viscosity and properties of epoxy resins [5] which may then be formulated into CASE applications: Coatings, [6] Adhesives, Sealants, Elastomers, composite materials, fillers, putties, plasters, modelling clay and semiconductors. It also has a number of medical applications.
As an epoxy modifier it is classed as an epoxy reactive diluent. [8] It is one of a family of glycidyl ethers available used for viscosity reduction of epoxy resins. [9] These are then further formulated into coatings, sealants, adhesives, and elastomers. [10] [11] Resins with this diluent tend to show improved workability. [12]
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