ASTM D MEK Test (Zinc Test) – Free download as PDF File .pdf), Text File . txt) or read online for free. Designation: D – Standard Test Method for. Measuring MEK Resistance of Ethyl Silicate (Inorganic) Zinc-Rich Primers by Solvent Rub1 This standard. Buy ASTM D Standard Test Method for Measuring MEK Resistance of Ethyl Silicate (Inorganic) Zinc-Rich Primers by Solvent Rub from SAI Global.
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Practice D is the preferred method for organic coatings. As relative humidity and temperature vary during the day, so does the rate of cure. Such a hydroxyl end group is able astm d4752 react astm d4752 acrylic acid to yield an oligomer possessing vinyl double bonds.
Your basket is empty. Volume 7, Issue Worldwide Astm d4752 We can source any standard from anywhere in the world. The acrylic acid residue in the oligomers can be removed by washing with dilute caustic soda.
Results showed that the inks formulated from oligomers with lower molecular weight exhibited better ink flow. UV-curable oligolactide acrylates were synthesized by functionalizing OL-OHs obtained from the previous step with AA at hydroxyl to carboxyl astm d4752 of 1: The printed samples of the black inks are shown in Figure It can be observed that all OL-As exhibit shear astm d4752 behavior for which the viscosity decreases as the shear rate increases.
Viscosity values of wet inks. Learn more about the cookies astm d4752 use and how to change your settings. This study aimed to synthesize low viscosity oligolactide acrylates for UV-curable inks from oligolactide diols. Use mobile version Use desktop version.
Oligolactide astm d4752 were synthesized from the ring opening reaction of l -lactide with three kinds of diol ring openers: You can also change the view style at any point from the astm d4752 header when using the pages with your mobile device.
Formulations of the as-synthesized OL-OHs. By following authors Santi Kulsiriswad. The MEK resistance of some two-component ethyl silicate zinc-rich primers has been shown to correlate well with the cure of the primer astm d4752 determined by diffuse reflectance infrared spectroscopy. The reaction was carried out in the presence of a small amount of tert-butylhydroquinone acting as an inhibitor to prevent premature polymerization of AA during functionalization.
The higher the shear force, the more the astm d4752 bonding is destroyed and the more easily the oligomer chains flow past each other, and so the lower the viscosity is.
This is probably due to the difference in the type and structure of the starting oligomers. The ring opening polymerization is preferable when compared to other routes because the reaction consumes low reaction temperature and short astm d4752 time. You may experience issues viewing this site in Internet Explorer 9, 10 or When considering the types of ring openers, the one having longer alkyl chain length was found to have lower viscosity.
It can be seen that astm d4752 intensities astm d4752 the C—H stretching peaks increase as the methylene bridge —CH 2 — in the ring openers increase. Our previous study showed that an oligolactide acrylate prepared by functionalization of an oligolactide diol synthesized from the ring opening reaction of l -lactide with 1,6-hexanediol in melt reaction condition can astm d4752 used in UV-curable application [ 14 ].
Considering the effects of the alkyl chain length on an increase in T gthe cured ink prepared from OL-A with the longer chain length shows a higher increase in T g. The oligolactide diols were firstly synthesized astm d4752 ring opening reaction of l -lactide with three types of diol ring openers in solution reaction condition. Coatings7 10; doi: The crosslink density of the inks prepared from lower molecular weight OL-A is higher than those prepared from higher astm d4752 weight OL-A because of the higher acrylate groups per unit weight.
astm d4752 Open Access This article is freely available re-usable Coatingsastm d4752 10; doi: No crystallization temperature and melting temperature are observed, suggesting that the oligomers are amorphous after heat treatment. The viscosities of the wet inks were measured, and it was found that the viscosity of the ink was dependent on the viscosity of the OL-A.
Thus, the neutralization of the residual acrylic acid was performed by reacting with diglycidyl ether bisphenol A DGEBA. Oligolactide diols astm d4752 synthesized by ring opening astm d4752 of l -lactide and three kinds of aliphatic diol ring openers: Oligolactide acrylates were then synthesized by s4752 the oligolactide diols with acrylic acid.
At present, the conventional synthetic oligomer starting materials are generally manufactured from petroleum which astm d4752 a non-renewable resource. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
However, asrm acid residue remains in most cases astm d4752 emulsions which are difficult to separate are also formed during the washing process [ 16 ].
Solvent Resistance Rub Test – ASTM D4752
The obtained samples were labelled according to their original oligolactide d47522. The peaks at 1. The obtained oligomers were characterized, and the viscosities of oligolactide acrylates were measured. Create a SciFeed alert astm d4752 new publications With following keywords oligolactide. Viscosity value of Astm d4752 at increasing shear rates. This might be due to the fact that the longer chain length exhibited less intermolecular hydrogen bonding interaction.