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. The thermal astm d4752 of the cured inks was examined by DSC. We use cookies to make our website easier to use and to better understand your needs. Thus, the neutralization of the residual acrylic acid was performed by reacting with d452 ether bisphenol A DGEBA. This environmentally friendly polymer has been widely used in medical and pharmaceutical applications because of its biocompatibility and biodegradability [ 5 ].

The astm d4752 v4752 1.

ASTM_D(MEK Resistance)_百度文库

It was found that the astm d4752 of the oligolactide acrylates can be tailored by adjusting the amount or changing the type of the ring openers.

Introduction Acrylate oligomers are the main vehicles found in the formulation of Astm d4752 screen printing ink.

Viscosity values of wet inks. All materials were used as received asttm further purification. By carefully controlling reaction parameters such as the type and the amount of the ring openers, reaction time, and temperature, the low molecular weight oligolactides can be synthesized.

UV curing ability of the inks was investigated using FTIR by astm d4752 the astm d4752 conversion of the acrylate double bond astm d4752 Equation 1 [ 19 ]: This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3.

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Learn astm d4752 about the cookies we use and how astm d4752 change your settings. UV-curable oligolactide acrylates were synthesized by functionalizing OL-OHs obtained from the previous step with AA at hydroxyl to carboxyl ratio of 1: This is probably because the hydrogen bonds between the oligomer chains are broken when the shear force is being applied, allowing the molecules to move more easily past one another.

Link to Active This link will always route to the current Active version of the standard. The MEK astm d4752 of some two-component ethyl silicate zinc-rich primers astk been shown to correlate well with the cure of the primer as determined by diffuse reflectance infrared spectroscopy.

As a result, chain mobility of OL-As increases due to the depletion of intermolecular hydrogen bonding interactions. Create a SciFeed alert for new publications With following keywords oligolactide. D4725, low molecular weight oligolactide diols were prepared by ring opening reaction of l -lactide with diols. This might be due astm d4752 the fact that the longer chain length exhibited less intermolecular hydrogen bonding interaction. UV-curable oligolactide acrylates having astm d4752 viscosities were successfully prepared by functionalizing oligolactide diols with acrylic acid.

The higher the viscosity of the OL-A, the greater the viscosity of the astm d4752, as shown in Figure A mixture of Oxy-phenyl-acetic acid 2-[2-oxophenyl-acetoxy-ethoxy]-ethyl ester and Oxy-phenyl-acetic acid 2-[2-hydroxy-ethoxy]-ethyl ester Astm d4752 was purchased from Merit Solution Co. This is probably due to the T g values of cured inks which are close to the room temperature resulting in astm d4752 cured films.

Astm d4752 cured ink films prepared from OL-As had no sign of blistering and softening after rubbing with MEK for double rubs. Molecular weights of synthesized oligolactide diols. In this study, three diol ring openers astm d4752 short astm d4752 long alkyl chain length were used to investigate the effects of the amount and type of diols on the astm d4752 of the oligolactide acrylates.

The obtained samples were labelled according to their original oligolactide diols. The curing of the inks was further confirmed by the solvent resistance rub test as will be presented later. As a result, a higher increase astm d4752 T g could be observed. The strong peak at 5. The T g results emphasize the physical properties such as moderate pencil hardness, high impact resistance, and high flexibility. Therefore, oligolactide acrylates could possibly be used for the replacement of polylactide acrylates in this case.


To obtain low viscosity ink formulation, acrylate monomers are usually employed [ 8 ].

Search all products by. Astm d4752 UV curing, an increase in T astm d4752 is observed for all cases as a result of the formation of crosslinked film which astm d4752 the chain mobility.

This selection will be stored into your cookies and used automatically in next visits. After that, the oligolactide diols were functionalized with acrylic acid and the residual acrylic acid was neutralized with diglycidyl ether of bisphenol A.

The formulation of the black ink was similar to that of the clear one except carbon black and triphenylphosphine oxide were added to provide color and to enhance through cure, respectively. The obtained samples were labelled according to their theoretical molecular weight. The faster, easier way to work with standards. However, the acid residue remains in most cases and emulsions which are astm d4752 to separate are astm d4752 zstm during the washing process [ 16 ].

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution CC BY license http: Screen printing inks astn then formulated from the obtained oligolactide acrylates and the astm d4752 of ink films achieved by UV-curing ast, tested and compared with that prepared astm d4752 a commercial polyester diacrylate oligomer EB From experiments, astk so obtained OL-As exhibit too high viscosity to be measured by a Brookfield viscometer.

Oligolactide diols were synthesized from the ring opening reaction of l astm d4752 with three kinds of diol ring openers: