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GB/T 21782.8-2008 English PDF

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GB/T 21782.8-2008: Coating powders -- Part 8: Assessment of the storage stability of thermosetting powders
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GB/T 21782.8-2008English194 Add to Cart 3 days [Need to translate] Coating powders -- Part 8: Assessment of the storage stability of thermosetting powders Valid GB/T 21782.8-2008

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Basic data

Standard ID GB/T 21782.8-2008 (GB/T21782.8-2008)
Description (Translated English) Coating powders -- Part 8: Assessment of the storage stability of thermosetting powders
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard A80
Classification of International Standard 13.300
Word Count Estimation 10,116
Date of Issue 2008-05-12
Date of Implementation 2008-09-01
Quoted Standard GB/T 9278-2008; GB/T 9754-2007; GB/T 13452.2-2008; GB/T 20624.1-2006; GB/T 20624.2-2006; ISO 1514-2004; ISO 8130-6-1992; ISO 8130-9-1992
Adopted Standard ISO 8130-8-1994, 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 thermosetting powder storage stability assessment. The thermosetting powder coating which provides the physical and chemical activity retention and forming a satisfactory evaluation of the ability of the final coating test procedure. Different properties of the relationship between changes can not be expected. Similarly, in different storage conditions, test results obtained there is no correlation. By the procedures specified in this part of the test results obtained powder coatings described before construction can withstand storage capacity limit.

GB/T 21782.8-2008: Coating powders -- Part 8: Assessment of the storage stability of thermosetting powders


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Coating powders Part 8. Assessment of the storage stability of thermosetting powders ICS 13.300 A80 National Standards of People's Republic of China GB/T 21782.8-2008/ISO 8130-8.1994 Powder coatings - Part 8. Evaluation of storage stability of the thermosetting powder (ISO 8130-8.1994, 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 8 GB/T 21782 of. This section identical with the international standard ISO 8130-8.1994 "Part 8 Powder Coatings. Evaluation of the storage stability of thermosetting powder" (In English). This part of ISO 8130-8.1994 as compared to doing the following editorial changes. --- Remove the International Standard ISO 8130-8.1994 Normative documents in standard ISO 1514.1993, ISO 3270. 1984, ISO 2808.1997 and ISO 6272.1993, and then click Change revision of their respective countries after the appropriate alternative or equivalent standards adopted Home Standard ISO 1514.2004, GB/T 9278-2008, GB/T 13452.2-2008 and GB/T 20624-2006; "." --- With a decimal point instead of a comma as the decimal point, ""; --- Delete international standards foreword. This part of the Appendix A and Appendix B are normative appendix. 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. The main drafters of this section. Chengu Feng, Di Cuiping, plum built Yueda Lei, Chen Qiang, Zheng Jianguo, Yang Bei, Zhao Ling, WANG Gui-rong, Hu Zhong, Li Qingxiang. This section first release. GB/T 21782.8-2008/ISO 8130-8.1994

Introduction

Powder coatings that govern two different aging mechanism. a mechanism related to the physical state of the powder, the powder of the other mechanism involves Chemical activity. Powder coatings can lead to changes in the final coating physical and chemical properties deteriorate. This section provides post evaluation thermosetting powder coating is subjected to a predetermined storage conditions to test its physical and chemical properties change tendency test program. GB/T 21782.8-2008/ISO 8130-8.1994 Powder coatings - Part 8. Evaluation of storage stability of the thermosetting powder

1 Scope

This section GB/T 21782 specifies the evaluation of thermosetting powder storage stability. Which provides a thermosetting powder coating physical Status and chemical activity retention and the formation of a satisfactory final coating ability evaluation test program. Phase variation between different properties Mutual relations are not expected. Similarly, under different storage conditions, test results obtained are not correlated. The test results by the procedures specified in this part of the obtained illustrate the ability of the powder coating before construction can withstand storage time limit.

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 9278-2008 Paints, varnishes and raw materials and to adjust temperature and humidity test (ISO 3270. 1984, IDT) 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 13452.2-2008 Paints and varnishes - Determination of film thickness (ISO 2808.1997, IDT) GB/T 20624.1-2006 Paints and varnishes - Rapid - deformation (impact resistance) tests - Part 1. Falling-weight test (large red Head) (ISO 6272-1.2002, IDT) GB/T 20624.2-2006 Paints and varnishes - Rapid - deformation (impact resistance) tests - Part 2. Falling - weight test (small red area Head) (ISO 6272-2.2002, IDT) ISO 1514.2004 Paints and varnishes - Standard panels for ISO 8130-6.1992 powder coatings - Part 6. Determination of thermosetting powder coatings at a given temperature to the gel time ISO 8130-9.1992 Powder Coatings Part 9. Sampling Principle 3 The thermosetting powder paint in a specific storage environment, the storage at a predetermined temperature for a predetermined period of time. Record Powder Coatings Changes in free-flowing properties, according to a predetermined level table to record their agglomeration into a group or situation, then appraisal becomes powder chemical reaction capacity Of all changes and forming a satisfactory final coating capabilities. By applying a weight on the specimen to simulate the bottom of the container to withstand conditions. NOTE. If an item has been shown to deteriorate the performance of a sample to an unsatisfactory level, you do not need to do other tests further.

4 requires supplementary information

For any specific applications, test methods specified in this section needs to be improved by additional information. These make up Charge data item is given in Appendix A.

5 Instruments

5.1 air circulation oven It should be maintained at ± 0.5 ℃ of 30 ℃ ± 0.5 ℃ or 40 ℃ temperature range. You can also use a water bath, but the sample should be carefully sealed to prevent ingress of water. GB/T 21782.8-2008/ISO 8130-8.1994

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