acid acceptor

acid acceptor

[′as·əd ək′sep·tər]
(organic chemistry)
A stabilizer compound added to plastic and resin polymers to combine with trace amounts of acids formed by decomposition of the polymers.
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To solve this problem, Yokohama Rubber mixed an acid acceptor into the polyamide resin to enable it to capture and hold the acid runoff.
It can be seen from Figure 4 that electrons transfer from the amino donor to the benzoic acid acceptor. In gas, the maximum absorption peak is 452 nm (463 nm in solvent), and the oscillator strength is 0.5880 (0.7021 in solvent).
The HOMO-2 electron densities are localized in the bithiophene bridge and cyanoacrylic acid acceptor. While the LUMO levels are largely dominating contributions from the [pi]*-orbitals of the cyanoacrylic acid and the nearby [pi]-linkers, which facilitate the electron charge transfer from the donor to acceptor.
Haistab 1214 is a nontoxic acid acceptor for rigid PVC that reportedly improves the performance of organotin heat stabilizers in extruded products, such as vinyl siding or profile.
Users gain the flexibility of producing a wide range of end-use tailored compounds from either reactor flake or granule or from a basic compounded pellet containing only antioxidant and acid acceptor. According to Eastman's calculations, a 220-million-lb/yr resin plant could spend $1.5 million for equipment to apply the Aquastab coatings, using six operators.
The optimization of the acid acceptor system, particularly the amount of magnesium oxide used (refs.
HSA 10 is a micronized, high activity MgO for use as a scorch retarder in chloroprene and fluoroelastomers, as a thickening agent for SMC/BMC, and as an acid acceptor in halogenated and chloroprene adhesives.
If the next higher UL rating, 105 [degrees] C, is desired, this is also readily accomplished (table 4) by using a less volatile plasticizer, a more efficient acid acceptor, and an antioxidant which will not interfere with a peroxide cure.
Now, magnesium hydroxide is an acid acceptor. Indeed, its classic and wide spread use in both liquid and tablet antacid formulations is based on its ability to neutralize acids.
Elesh, Spectroscopic and physical measurements on charge-transfer complexes: Interactions between norfloxacin and ciprofloxacin drugs with picric acid and 3,5-dinitrobenzoic acid acceptors, J.
Viton is a fluorocarbon resin that is mixed with a filler, such as carbon black; acid acceptors, such as magnesium oxide (MgO); and curing agents before being cured into a fluoroelastomer material and sold as Viton O-rings.
Additional process factors that increase costs are rheological variability due to hygroscopic acid acceptors, mold sticking and difficulty dispersing an additional compound ingredient, calcium hydroxide.