GB/T 21867.3-2008Pigments and extenders -- Methods of assessment of dispersion characteristic -- Part 3: Assessment from the change in gloss (English PDF)

Foreword

This section identical with the international standard ISO 8781-3:1990 Assessment Method "pigments and dispersion - Part 3. From Gloss change was evaluated "(in English).

This section is one of the GB/T 21867 "Evaluation Method pigments and dispersion of" national standards, the Department listed below Column structure and the corresponding national standards with international standards.

--- Part 1. Changes the tinting strength of colored pigments to be assessed (ISO 8781-1:1990);

--- Part 2. change the fineness of grind to be assessed (ISO 8781-2:1990);

--- Part 3. Evaluation of changes in the gloss (ISO 8781-3:1990).

This section GB/T Part of 321,867.

Are listed below in this section is closely related to the GB/T 21868 "Pigments and extenders dispersion for assessment of dispersion method used" series National standards for structure and corresponding international standards.

--- Part 1. General (ISO 8780-1:1990);

--- Part 2. oscillation mill dispersion (ISO 8780-2:1990);

--- Part 3. dispersion using a high speed mixer (ISO 8780-3:1990);

--- Part 4. sand dispersion (ISO 8780-4:1990);

--- Part 5. automatic flat mill dispersion (ISO 8780-5:1990);

--- Part 6. ( 1990 ISO 8780-6) dispersed with a three-roll mill.

This section of Appendix A normative appendix.

This part is proposed by the China Petroleum and Chemical Industry Association.

This part of the National Standardization Technical Committee and is under the jurisdiction of paints and pigments.

This section is drafted. in the construction of Changzhou coating Chemical Research Institute, Kunshan City Shiming Technology Development Co., Ltd.

1 Scope

This section provides a specular gloss was evaluated according to the pigment dispersion method. This section should be GB/T 21868.1-2008 together read.

This method is generally applicable to compare similar pigments, pigment such as test and compare the agreed reference pigment.

2 Normative references

The following documents contain provisions which, through reference GB/T 21867 in this section constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.

GB/T 9754-2007 Paints and varnishes contain metallic paint films of 20 °, 60 ° and 85 ° specular gloss measurement (ISO 2813:1994, IDT) GB/T 21868.1-2008 Pigments and extenders dispersion for assessment of dispersion method used in Part 1. General (ISO 8780-1:1990, IDT) GB/T 21868.2-2008 dispersion method of pigments and extenders used in assessment of dispersion characteristics - Part 2. oscillation mill dispersion (ISO 8780-2:1990, IDT) GB/T 21868.3-2008 Pigments and extenders assessment of dispersion characteristics by dispersing methods - Part 3. High-speed mixer points Powder (ISO 8780-3:1990, IDT) GB/T 21868.4-2008 dispersion method of pigments and extenders used in assessment of dispersion characteristics - Part 4. Sand Milling (ISO 8780-4:1990, IDT) GB/T 21868.5-2008 Methods for dispersing pigments and extenders assessment of dispersion characteristics with 5. automatic flat grinding points Powder (ISO 8780-5:1990, IDT) GB/T 21868.6-2008 Pigments and extenders assessment of dispersion characteristics of the dispersion methods - Part 6. a three-roll mill dispersion (ISO 8780-6:1990, IDT) Principle 3 Under specified conditions, the test pigment and agreed reference pigment dispersed in a phased manner agreed paint-based systems, respectively. In each sub Powder stage, withdrawing a portion of the grind of the coating material, the coating on the substrate, drying or baking.

Measured by the method of GB/T 9754-2007 the provisions of each dry film specular gloss. Draw gloss value (when dispersed in the grinding stage Room graph grinding revolutions, or by showing the number of three-roll mill) function. Agreed to acquire the desired specular gloss values \u200b\u200bcan be determined from FIG.

Dispersed phase.

4 Requires supplementary information

Test methods specified in this part needs to be improved with additional information. Contents of additional information are listed in Appendix A.

5 Instruments

Normal laboratory equipment and glassware, as well as the following instruments.

GB/T 21867.3-2008/ISO 8781-3:1990