GB/T 21782.7-2008 English PDF

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GB/T 21782.7-2008: Coating powders -- Part 7: Determination of loss of mass on stoving
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21782.7-2008	114	Add to Cart	3 days	Coating powders -- Part 7: Determination of loss of mass on stoving	Valid

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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Older Standard (superseded by this standard): GB/T 16592-1996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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