ASTM D2697 PDF

or both, the greater will be the deviation of the coverage calculation (This is also true to a lesser degree with Test Method D). For various reasons the. ASTM D is intended to provide a measure of the volume of dry coating obtainable from a given volume of liquid coating. This value is useful for comparing. Comparison of the ASTM D Method and the film thickness method for obtaining volume solids 3. Bibliography.

Author: Nikoran Mikree
Country: Bahrain
Language: English (Spanish)
Genre: Art
Published (Last): 11 June 2004
Pages: 412
PDF File Size: 1.42 Mb
ePub File Size: 12.74 Mb
ISBN: 539-9-75986-595-7
Downloads: 89888
Price: Free* [*Free Regsitration Required]
Uploader: Sakinos

R2697 value is useful for comparing the coverage square feet of surface covered at a specified dry film thickness per unit volume obtainable with different coating products. It is the responsibility of the user of this standard to establish appropriate safety and health qstm and determine the applicability of d26977 limitations prior to use. Link to Active This link will always route to the current Active version of the standard. One reason is that the volume occupied by a solution of resin in solvent may be the same, greater, or less than the total volume of the separate ingredients.

Link to Active This link will always route to the current Active version of the standard. The approach used should provide faster and more accurate results than the use of the liquid displacement technique in Test Method Dparticularly for coatings that are difficult to wet or that contain voids, cracks or other defects.

ASTM D – 03 Standard Test Method for Volume Nonvolatile Matter in Clear or Pigmented Coatings

Helium solves this problem since, as a gas, it readily penetrates and displaces air, water, and astn solvents even at low pressures. In Practice D paragraph Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

  DODI 5000.2 PDF

The values given in parentheses are for information only.

Asmt use of volume nonvolatile matter values in such instances should be carefully considered as the increased qstm is largely due to air trapped in these voids. Earlier collaborative studies included a gloss enamel, a flat wall paint, a gloss house enamel, an industrial baking enamel, an interior latex paint, and an exterior latex paint. Since the actual coverage of a coating includes the void volume and the porosity of the film, the coverage value calculated from this method will be inaccurate by that amount, that is, the actual coverage will be greater.

This provides a more accurate determination of void s2697 than can be obtained via liquid displacement. Referenced Documents purchase separately The documents listed d6297 are referenced within the subject standard but are not provided as part of the standard. An interlaboratory study to establish the precision of this test method included a water-reducible exterior latex paint and three automotive coatings that included a solvent-reducible primer surfacer, water reducible primer surfacer, water reducible enamel topcoat, and acrylic dispersion lacquer topcoat.

Prior to this method a satisfactory procedure for measuring percent volume nonvolatile did not exist see Note 11 in Practice D Above the critical pigment volume concentration, the apparent volume of the dry film is significantly greater than theoretical due to the increase in unfilled voids between pigment particles.

The improvement in accuracy stems from the superior ability of helium gas under pressure to penetrate very small pores and surface irregularities in dried films. Purging the gas pycnometer flushes these materials from the film.

  AMINOACIL ARNT SINTETASA PDF

The use of volume nonvolatile matter values in asfm instances should be carefully considered as the increased volume is largely due to air trapped in these voids.

Historical Version s – view previous versions of standard. One reason is that the volume occupied by a solution of resin in solvent may be the same, greater, or less than the total volume of the separate ingredients: With high poly vinyl chloride PVC films, however, liquid displacement of air voids takes place with difficulty even under high pressures.

Historical Version s – view previous versions of standard. Such contraction or expansion of resin solutions is governed by a number of factors, one of which is the extent and direction of spread between solubility parameters of the resin and solvent.

Volume Nonvolatile Matter in Clear or Pigmented Coatings – ASTM D2697

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.

This value is useful for calculating the volatile organic content VOC of a coating and could be used to estimate the coverage square feet of surface covered at a specified dry film thickness per unit volume obtainable with different coating products. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered astn.

Above the critical pigment volume concentration, the apparent volume of the dry film is significantly greater than theoretical due to the increase in unfilled voids between pigment particles.