GB/T21782 "Powder coatings" is divided into 14 parts, this part is the 8th part of GB/T21782. This part is equivalent to the international standard ISO8130-8:1994 "Powder coatings Part 8: Evaluation of storage stability of thermosetting powders" (English version). This standard specifies the evaluation of storage stability of thermosetting powders. It specifies the evaluation test procedures for the physical state and chemical activity retention of thermosetting powder coatings and the ability to form a satisfactory final coating. The correlation between different performance changes is unpredictable. Similarly, there is no correlation between the test results obtained under different storage conditions. GB/T 21782.8-2008 Powder coatings Part 8: Evaluation of storage stability of thermosetting powders GB/T21782.8-2008 Standard download decompression password: www.bzxz.net
GB/T21782 "Powder coatings" is divided into 14 parts, this part is the 8th part of GB/T21782. This part is equivalent to the international standard ISO8130-8:1994 "Powder coatings Part 8: Evaluation of storage stability of thermosetting powders" (English version). This standard specifies the evaluation of storage stability of thermosetting powders. It specifies the test procedures for evaluating the physical state and chemical activity retention of thermosetting powder coatings and the ability to form a satisfactory final coating. The correlation between different performance changes cannot be predicted. Similarly, there is no correlation between the test results obtained under different storage conditions.
class="f14" style="padding-top:10px; padding-left:12px; padding-bottom:10px;"> GB/T21782 "Powder Coatings" is divided into 14 parts. The structure and its corresponding international standards are as follows:
---Part 1: Determination of particle size distribution by sieving method (ISO81301:1992, IDT);
---Part 2: Determination of density by gas comparison pycnometer method (arbitration method) (ISO81302:1992, IDT);
---Part 3: Determination of density by liquid displacement pycnometer method (ISO81303:1992, IDT);
---Part 4: Calculation of lower explosion limit (ISO81304:1992, IDT);
---Part 5: Determination of flow properties of powder/air mixtures (ISO 8130-5:1992, IDT);
---Part 6: Determination of gel time of thermosetting powder coatings at a given temperature (ISO 8130-6:1992, IDT);
---Part 7: Determination of mass loss on baking (ISO 8130-7:1992, IDT);
---Part 8: Evaluation of 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: Inclined plane flow test (ISO8130-11:1997, IDT);
---Part 12: Determination of compatibility (ISO8130-12:1998, IDT);
---Part 13: Particle size analysis by laser diffraction (ISO8130-13:2001, IDT);
---Part 14: Terminology (ISO8130-14:2004, IDT).
This part is Part 8 of GB/T 21782.
This part is equivalent to the international standard ISO8130-8:1994 "Powder coatings Part 8: Evaluation of storage stability of thermosetting powders" (English version).
Compared with ISO8130-8:1994, the following editorial changes have been made to this part:
--- Delete the standards ISO1514:1993, ISO3270:1984, ISO2808:1997 and ISO6272:1993 in the normative references of the international standard ISO8130-8:1994, and replace them with the revised corresponding replacement standards or equivalent corresponding national standards ISO1514:2004, GB/T9278-2008, GB/T13452.2-2008 and GB/T20624-2006;
--- Replace the comma as the decimal point with the decimal point .;
--- Delete the foreword of the international standard.
Appendices A and B of this part are normative appendices.
This part is proposed and managed by the National Technical Committee for Standardization of Dangerous Chemicals Management (SAC/TC251).
The drafting units of this part: Guangdong Entry-Exit Inspection and Quarantine Bureau, Sinochem Changzhou Coating Chemical Research Institute, Marine Chemical Research Institute, Sinochem Chemical Standardization Institute, Hubei Entry-Exit Inspection and Quarantine Bureau. The
main drafters of this part: Chen Gufeng, Zhai Cuiping, Mei Jian, Yue Dalei, Chen Qiang, Zheng Jianguo, Yang Bei, Zhao Ling, Wang Guirong, Hu Xiaozhong, Li Qingxiang.
This part is published for the first time.
The clauses in the following documents become the clauses of this part through reference in this part of GB/T 21782. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, parties to an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions apply to this part.
GB/T9278-2008 Temperature and humidity for conditioning and testing of paints, varnishes and their raw materials (ISO3270:1984, IDT)
GB/T9754-2007 Paints and varnishes Determination of 20°, 60° and 85° specular gloss of paint films without metallic pigments (ISO2813:1994, IDT)
GB/T13452.2-2008 Determination of film thickness of paints and varnishes (ISO2808:1997, IDT)
GB/T20624.1-2006 Paints and varnishes Rapid deformation (impact resistance) test Part 1: Drop weight test (large area punch) (ISO6272-1:2002, IDT)
GB/T20624.2-2006 Paints and varnishes - Rapid deformation (impact resistance) test - Part 2: Drop weight test (small area punch) (ISO6272-2:2002, IDT)
ISO1514:2004 Paints and varnishes - Standard test panels
ISO8130-6:1992 Powder coatings - Part 6: Determination of gel time of thermosetting powder coatings at a given temperature
ISO8130-9:1992 Powder coatings - Part 9: Sampling

ICS 13. 300
National Standard of the People's Republic of China
GB/T 21782.8—2008/1S0 8130-8:1994 Powder Coatings
Part 8:
Assessment of the storage stability of thermosetting powders(IS0 8130-8:1994.IDT)
Published on 2008-05-12bzxZ.net
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
Implemented on 2008-09-01
GB/T 21782.8-—2008/IS0 8130-8: 1994GB/T21782 Powder Coatings" is divided into 14 parts, the structure and its corresponding international standards are as follows: Part 1: Determination of particle size distribution by sieving method (ISO8130-1: 1992, IDT); Part 2: Determination of density by gas comparison pycnometer method (arbitration method) (ISO8130-2: 1992, IDT); Part 3: Determination of density by liquid displacement pycnometer method (ISO8130-3: 1992.1DT); Part 4: Calculation of lower explosion limit (ISO8130-1: 1992, IDT); Part 5: Determination of flow characteristics of powder/air mixtures (ISO8130-5: 1992, IDT) Part 6: Determination of gel time of thermosetting powder coatings at a given temperature (ISO8130-6: 1992, ID T); Part 7: Determination of mass loss during baking (ISO8130-7: 1992 IDT); Part 8: Evaluation of storage stability of thermosetting powders (ISO8130.8: 1994, IDT); Part 9: Sampling ISO8130-9: 1992. IDT); Part 10: Determination of deposition efficiency (ISO8130-10: 1998, 1DT); Part 11: Inclined plane flow test (ISO8130-11: 1997 IDT); Part 12: Determination of compatibility (ISO8130-12: 1998, IDT); Part 13: Particle size analysis by laser beam irradiation (ISO8130-13: 2001, 1DT); Part 14: Terminology (ISO8130-11: 2004, DT). This part is Part 8 of GB/T21782. This part is equivalent to the international standard ISO8130-8:1994 Powder coatings Part 8: Evaluation of storage stability of thermosetting powders (English version).
Compared with IS08130-8:1991, this part has made the following editorial changes: Delete the standards ISO1514:1993, ISO3270:1984, IS(2808:1997 and IS06272:1993 in the normative reference documents of the international standard ISO8130-8:1994, and replace them with the corresponding revised alternative standards or the corresponding national standards ISO1514:2004, GB/T92782008.GB/T13452.2-2008 and GB/T20624-2006; Use the decimal point "\" instead of the comma "," as the decimal point ;- Delete the foreword of the international standard.
Appendices A and B of this part are normative appendices. This part was proposed and managed by the National Technical Committee for the Promotion of Standardization of Hazardous Chemicals (SAC/TC251). Drafting units of this part: Guangdong Exit-Entry Inspection and Quarantine Bureau, Sinochem Changzhou Paint Chemical Research Institute, Marine Chemical Research Institute, Sinochem Chemical Standardization Institute, Hubei Exit-Entry Inspection and Quarantine Bureau. Main drafters of this part: Chen Gufeng, Zhai Cuiping, Mei Jian, Yue Dalei, Chen Qiang, Zheng Jianguo, Yang Bei, Zhao Ling, Wang Guizhu, Hu Xiaozhong, Li Qingban.
This part is published for the first time.
GB/T21782.8—2008/1S0 8130-8:1994 Introduction
Powder coatings are subject to two different aging mechanisms: one involving the physical state of the powder, and one involving the chemical activity of the powder. Changes in powder coatings can lead to deterioration of the physical and chemical properties of the final coating. This part specifies test procedures for evaluating the tendency of changes in the physical and chemical properties of thermosetting powder coatings after being subjected to specified storage conditions.
1 Scope
GB/T21782.8--2008/1SO8130-8:1994 Powder coatings Part 8:
Evaluation of storage stability of thermosetting powders
This part of GB/T 21782 specifies the evaluation of the storage stability of thermosetting powders. It specifies test procedures for evaluating the retention of the physical state and chemical activity of thermosetting powder coatings and their ability to form a satisfactory final coating. The relationship between the changes in the different properties cannot be predicted. Similarly, in different The test results obtained under storage conditions are not relevant. The test results obtained by the procedures specified in this part illustrate the ability of powder coatings to withstand storage time limits before application. 2 Normative references
The clauses in the following documents become clauses of this part through reference to this part of GB/T 21782. For dated references, all amendments (excluding errata) or revisions accompanying them are not applicable to this part. However, parties to agreements based on this part are encouraged to investigate whether the latest versions of these documents can be used. For undated references, the latest versions apply to this part.
GB/T 9278-2008 Temperature and humidity for conditioning and testing of paints, varnishes and their raw materials (ISO 3270: 1981, IDT) (G13/T 9751-2007 Paints and varnishes Determination of 20°, 60° and 85° specular gloss of paint films without metallic pigments (ISO 2813:194,IDT)
GB/T 13152.2—20081
Determination of film thickness of paints and varnishes (IS02808:1997,IDT)GB/T20621.12006 Rapid deformation (impact resistance) test for paints and varnishes Part 1: Drop weight test (large area punch) (ISO 6272-1:2002,IDT)
CB/T20624.2-2006 Rapid deformation (impact resistance) test for paints and varnishes Part 2: Drop weight test (small area punch) (ISO 6272 2.2002.1DI)
IS01514:2004 Standard test panels for paints and varnishes ISO 8130-6:1992
2 Powder coatings Part 6: Determination of gel time of thermosetting powder coatings at a given temperature Powder coatings Part 9: Sampling
IS0 8130-9:1992
3 Principle
Thermosetting powder coatings are placed in a specific storage environment and stored at a specified temperature for a specified period of time. The changes in the free flow properties of the powder coating are recorded, and the agglomeration or caking is recorded according to the specified grade table. The changes in the ability of the powder to react chemically and any changes in its ability to form a satisfactory final coating are then evaluated. The conditions at the bottom of the container are simulated by applying a weight to the sample. Note: If a certain property of the sample has been shown to deteriorate to an unsatisfactory level, no further tests are required. 4 Supplementary information required
For any specific application area, the test methods specified in this section need to be improved by supplementary information. The items of this supplementary information are given in Appendix A.
5 Apparatus
5.1 Air circulation oven
Should be maintained in the temperature range of 30℃ + 0.5℃ or 40℃ + 0.5℃. A water bath can also be used, but the sample should be carefully sealed to prevent water from entering. 1
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