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GB/T 21782.3-2008 English PDF

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GB/T 21782.3-2008: Coating powders -- Part 3: Determination of density by liquid displacement pycnometer
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GB/T 21782.3-2008English114 Add to Cart 3 days [Need to translate] Coating powders -- Part 3: Determination of density by liquid displacement pycnometer Valid GB/T 21782.3-2008

PDF similar to GB/T 21782.3-2008


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Basic data

Standard ID GB/T 21782.3-2008 (GB/T21782.3-2008)
Description (Translated English) Coating powders -- Part 3: Determination of density by liquid displacement pycnometer
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard A80
Classification of International Standard 13.300
Word Count Estimation 6,688
Date of Issue 2008-05-12
Date of Implementation 2008-09-01
Quoted Standard GB/T 3186-2006; GB/T 21782.2-2008; ISO 787-10-1993; ISO 3696-1987
Adopted Standard ISO 8130-3-1992, IDT
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the determination of the density of the powder coating liquid displacement pycnometer method. This method is based on the quality and the sample volume was measured. This method specifies the equipment is relatively cheap, but the liquid displacement pycnometer method may give incorrect results, especially in the powder with the liquid displacement is expanded, or replacement of the liquid is not completely replace the air in the powder particles. When the liquid displacement method uses slower than GB/T 21782. 2-2008 " compare the proportion of gas analyzer measured density (Arbitration Act) " is more inaccurate, but also in comparison with the gas specific gravity proven method to get the same result instrument when it is used this method.

GB/T 21782.3-2008: Coating powders -- Part 3: Determination of density by liquid displacement pycnometer


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Coating powders Part 3. Determination of density by liquid displacement pyknometer ICS 13.300 A80 National Standards of People's Republic of China GB/T 21782.3-2008/ISO 8130-3.1992 Powder Coatings Part 3. Determination of the density of liquid displacement pyknometer method (ISO 8130-3.1992, IDT) Posted 2008-05-12 2008-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 21782 "powder coating" is divided into 14 parts, the structure and corresponding international standards are as follows. --- Part 1. Determination of particle size distribution by sieving (ISO 8130-1.1992, IDT); --- Part 2. Determination of density (Arbitration Act) compare the proportion of gas meter method (ISO 8130-2.1992, IDT); --- Part 3. Determination of liquid displacement pycnometer density (ISO 8130-3.1992, IDT); --- Part 4. Calculation of lower explosive limit (ISO 8130-4.1992, IDT); --- Part 5. Powder/air mixture Determination of flow characteristics (ISO 8130-5.1992, IDT); Measured at a given temperature thermosetting powder coating of gel time (ISO 8130-6..1992, IDT) --- Part 6; --- Part 7. Determination (ISO 8130-7.1992, IDT) mass loss during baking; --- Part 8. Evaluation of the storage stability of thermosetting powders (ISO 8130-8.1994, IDT); --- Part 9. Sampling (ISO 8130-9.1992, IDT); --- Part 10. Determination of deposition efficiency (ISO 8130-10.1998, IDT); --- Part 11. ramp flow test (ISO 8130-11.1997, IDT); --- Part 12. Determination of compatibility (ISO 8130-12.1998, IDT); --- Part 13. Laser diffraction particle size analysis (ISO 8130-13.2001, IDT); --- Part 14. Terminology (ISO 8130-14.2004, IDT). This is Part 3 GB/T 21782 of. This part identical with ISO 8130-3.1992 "powder coatings - Part 3. Determination of liquid displacement pycnometer density" (in English). For ease of use, this section made the following editorial changes. --- With "GB/T 3186-2006 Paints, varnishes and raw materials for paints and varnishes - Sampling (ISO 15528.2000, IDT)" instead of "ISO 842. 1984 Paints and varnishes - Sampling of raw materials" (ISO 842. 1984 has been canceled, the ISO 15528.2000 Generation for); --- With "ISO 787-10.1993" instead of "ISO 787-10. 1981"; "." --- With a decimal point instead of a comma as the decimal point, ""; --- Delete international standards foreword. This part of the National Chemicals Management Standardization Technical Committee dangerous (SAC/TC251) and focal points. Drafting this Part. Guangdong CIQ, in the construction of Changzhou coating Chemical Research Institute, Marine Chemicals Research Institute, the Chemical Standardization Institute, Hubei Exit Inspection and Quarantine, China National Institute of Standardization. The main drafters of this section. Liang Meiqiong, Linhong Xiong, Mei Jian, Chen Wenjie, Chen Qiang, Chen Gufeng, Peng-speed standard, Shen Jiang Su, Mao Leilei, Wang Fan, Liqing Xiang. This section first release. GB/T 21782.3-2008/ISO 8130-3.1992 Powder Coatings Part 3. Determination of the density of liquid displacement pyknometer method

1 Scope

This section GB/T 21782 specifies the determination of the density of the powder coating of liquid displacement pyknometer method. This method is based on the quality of the sample Determination of the amount and volume. This method specifies the equipment is relatively inexpensive, but the liquid displacement pyknometer method may give incorrect results, especially with the powder Disposable fluid expands when the liquid is not replaced or replaced entirely when the powder particles in the air. Liquid displacement method using a slower than "Determination of density (Arbitration Act) compare the proportion of gas meter method" GB/T 21782.2-2008 less accurate, but also proved to be in proportion with the gas comparison Measuring and come to the same result when it is using this method.

2 Normative references

The following documents contain provisions which, through reference GB/T 21782 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 3186-2006 Paints, varnishes and raw materials for paints and varnishes - Sampling (ISO 15528.2000, IDT) GB/T 21782.2-2008 powder coatings - Part 2. Determination of density (Arbitration Act) (ISO 8130-2 compare the proportion of instrument gas law. 1992, IDT) 1993 General methods of test for pigments and extenders - Part 10.. ISO 787-10 Density Pycnometer method ISO 3696. 1987 for analytical laboratory use specifications and test methods Principle 3 By liquid displacement pyknometer method (pycnometer comply with ISO 787-10.1993 regulations) measuring the density of the powder coating, the liquid used should Completely wetted with the sample and does not swell or dissolve the sample.

4 Materials

4.1 Water Freshly distilled and cooled, and its technical indicators should at least comply with ISO 3696. 1987 provided three water. 4.2 displacement liquid A mixture of aliphatic or aliphatic hydrocarbon free of aromatic compounds, boiling range 80 ℃ ~ 140 ℃. We found positive in many instances Heptane for the determination of the density of the thermosetting powder coating, however, if the n-heptane with which a sample or a component can play a role, it should be used He Suitable liquid. 4.3 acetone AR.

5 Instruments

5.1 pycnometer It shall comply with ISO 787-10.1993 requirements. GB/T 21782.3-2008/ISO 8130-3.1992

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