2EHA2-Ethyl Hexyl Acrylate
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Meanwhile, the curing agent Ancamine K61B (tris-(dimethylaminomethyl) phenol tri(2-ethyl hexanoate)) has several active sites that are able to react; these are tertiary amine groups, phenol hydroxy group, and 2-ethyl hexanoic acid (2EHA).
The acid to get the ether could be the 2EHA of Ancamine K61B or another proton medium.
(E1) Hydroxy group of resin reacts with hydroxy group of 2EHA (Fig.
(E2) Hydroxy group of Ancamine K61B reacts with hydroxy group of 2EHA (Fig.
(E3) Products obtained with negatively charged oxygen reacts with hydroxy group of 2EHA (Fig.
This phenomenon is attributed to the proportional reduction of 2-ethylhexanoic acid (2EHA) contained in Ancamine K61B.
It should be noted that the esterifications carried out by 2EHA imply the hypothesis that the acid allows the Ancamine K61B to work as a curing agent/cross-linker and at the same time, as a catalyst during cross-linking.
Reaction E1: hydroxy group of resin reacts with hydroxy group of 2EHA.
Reaction E2: hydroxy group of Ancamine K61B reacts with hydroxy group of 2EHA.
Theoretical [T.sub.g]s of acrylic resins were calculated from the ratio of MMA and 2EHA in the acrylic resin using the [T.sub.g]s of these homopolymers.
Next, 88.4 g MMA, 179.2 g 2EHA, the chitosan solution, 1.7 g NE-20, and 240 g ion exchanged water were emulsified at 10,000 rpm using a homogenizer.
Decreases in tensile strength and elongation at breaking points with the addition of chitosan to emulsion polymerizations are due to the following: in copolymerizations of emulsion polymerizations of chitosan-AA salts, MMA, and 2EHA with chitosan, molecular weights of AA-MMA-2EHA copolymers are lower than that of copolymers in the emulsion polymerization of AA, MMA, and 2EHA without chitosan.