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GB/T 21782.7-2008: Coating powders -- Part 7: Determination of loss of mass on stoving
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| GB/T 21782.7-2008 | English | 114 |
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Coating powders -- Part 7: Determination of loss of mass on stoving
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GB/T 21782.7-2008
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Basic data | Standard ID | GB/T 21782.7-2008 (GB/T21782.7-2008) | | Description (Translated English) | Coating powders -- Part 7: Determination of loss of mass on stoving | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A80 | | Classification of International Standard | 13.300 | | Word Count Estimation | 6,683 | | Date of Issue | 2008-06-19 | | Date of Implementation | 2009-02-01 | | Older Standard (superseded by this standard) | GB/T 16592-1996 | | Quoted Standard | GB/T 3186-2006 | | Adopted Standard | ISO 8130-7-1992, IDT | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 10 of 2008 (total 123) | | 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 spray applied to the substrate by electrostatic powder coating baked on the Determination of loss of mass. | GB/T 21782.7-2008: Coating powders -- Part 7: Determination of loss of mass on stoving---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Coating powders Part 7. Determination of loss of mass on stoving
ICS 13.300
A80
National Standards of People's Republic of China
GB/T 21782.7-2008/ISO 8130-7.1992
Replacing GB/T 16592-1996
Powder Coatings
Part 7. Determination of mass loss during baking method
(ISO 8130-7.1992, IDT)
Posted 2008-06-19
2009-02-01 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 composed of 14 parts, is expected to international standards and the corresponding structure is as follows.
--- Part 1. Determination of particle size distribution by sieving (ISO 8130-1.1992, IDT);
--- Part 2. Comparison of the proportion of instrument gas density determination (ISO 8130-2.1992, IDT);
--- Part 3. Determination of liquid displacement pycnometer density (ISO 8130-3.1992, IDT);
--- Part 4. lower explosion limit calculations (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 7 GB/T 21782 of.
This section identical with the international standard ISO 8130-7.1992 "powder coatings - Part 7. Determination of mass loss during baking Law" (English
Chinese Version).
This part of ISO 8130-7.1992 as compared to doing the following editorial changes.
--- With "this Part" instead of "ISO 8130 part of this";
--- 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";
--- With "GB/T 3186-2006" instead of "ISO 842";
"." --- With a decimal point instead of a comma as the decimal point, "";
--- Delete international standards foreword.
This Part replaces GB/T 16592-1996 "Determination of mass loss during baking powder coatings."
Section compared with the GB/T 16592-1996 The main changes are as follows.
--- Increase "in Appendix A of this part is a normative appendix." And GB/T 21782 series of standards on construction in the preface
content;
--- With "GB/T 3186-2006" instead of "ISO 842. 1984";
--- Remove Appendix B;
--- According to GB/T 1.1-2000 requirements to write, modify some of the provisions of expression.
Appendix A of this part is a normative appendix.
This part of the National Standardization Technical Committee and the pigment coating (SAC/TC5) centralized.
This part mainly drafted by. Guangdong CIQ, in the construction of Changzhou coating Chemical Research Institute, Marine Chemicals Research Institute, Sinochem
Chemical Standards Institute, Hubei Exit Inspection and Quarantine.
The main drafters of this section. Chen Qiang, Di Cuiping, Man Mo, Zhou Wei, Chen Gufeng, Zheng Jianguo, Peng-speed standard, Zhao Ling, Cui Hairong, WANG Gui-rong, Li Qingxiang.
This part of the standard replaces the previous editions as. GB/T 16592-1996.
GB/T 21782.7-2008/ISO 8130-7.1992
Powder Coatings
Part 7. Determination of mass loss during baking method
1 Scope
This section provides a method for measuring mass loss when the powder coating is applied by electrostatic spraying onto substrates baking.
Note 1. The method described in this section is simple and practical testing methods, the method for baking powder mass loss of about 2% (by mass) within the coating
Material gives sufficiently accurate results. Above this range, precision with increasing mass loss increases.
Note 2. The test product in the water will be included in the calculation result.
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)
3 necessary supplementary information
For specific applications, test methods specified in this section need to add integrity information. Supplementary information is given in Appendix A
s project.
4 Instrument
Common laboratory equipment and the following instruments.
4.1 flat dish
Tinplate or aluminum, a diameter of about 75mm. Pan size requirements are not very strict, but the bottom of the pan should be flat to ensure good heat
And the effect of the contact parts of the test sample can spread the powder coating into a uniform thin layer (thickness of the powder may produce significant results in Movies
ring).
4.2 air circulation oven
Can thermostat to 250 ℃. Type oven should be described in the test report, because the oven is designed to affect the test results.
4.3 Analytical Balance
Accurate to 0.1mg.
4.4 dryer
A desiccant, such as silica doped with cobalt chloride and dried.
5 Sampling
Extracting a representative sample of the test product according to the provisions of GB/T 3186-2006 of.
6 steps
With two parallel test sample.
6.1 Sample
The flat-bottomed dish (4.1) in the specified or agreed test temperature (see Appendix A) under the oven (4.2), place 15min, take out place
GB/T 21782.7-2008/ISO 8130-7.1992
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