News Details
Polyester powder coatings with crosslinking agent
2017-3-8 21:32:26
Polyester powder coatings with crosslinking agent, according to the current carboxyl polyester powder coating with the actual quality status of crosslinking agent and use requirements, combined with domestic and foreign relevant standard project Settings, set this standard, a total of nine control project.
According to the validation test plan, we mainly to hydroxyl equivalent, melting process, volatile, total chloride content, epoxy chloropropane, residues and hydroxyl alkyl amide content 6 project is verified, the remaining three projects has long experience accumulation data, for the first meeting has determined the test methods and indexes, so the verification experiment was carried out. According to the results of the validation test and advice, ultimately determine the polyester powder coatings with crosslinking agent technical indicators of the project and the corresponding parameter values.
Thermosetting powder coating with unsaturated polyester resin, thermosetting powder coatings with bisphenol A type epoxy resin and polyester powder coating made of crosslinking agent for powder coating main raw materials, at the request of the unit using, increasing the application of the product performance requirements in the standard, namely by the parties agreed on the formulation, production technology of powder coating and coating should comply with the standard HG/T 2006 or any other agreed standards.
Thermosetting powder coating based on polyester resin with respect to its application performance is a very complex system, its production, processing and application properties are closely associated with polyester resin properties, formula design requires consideration of the resin molecular weight, functionality, glass transition temperature, melt viscosity and reactivity, physical and chemical parameters.
According to the actual quality status of domestic powder coatings with polyester resin and use requirements, combined with the projects set in relevant standards at home and abroad, this standard sets the seven control project. According to the validation test plan, we mainly on the acid value, hydroxyl value of polyester resin, color, and glass transition temperature, a total of four technical performance verification tests have been carried out.
The remaining three projects has long experience accumulation data, when the first meeting has been preliminarily determines the test method and index, so the verification experiment was carried out. According to the experiment data, and after repeated discussions and advice, finally determined the thermosetting powder coatings with saturated polyester resin technical indexes of the project and the corresponding parameter values.
According to the domestic thermosetting powder coating with the actual quality status of bisphenol A type epoxy resin, and the use of demand, combined with domestic and foreign relevant standard project Settings, and to determine the standard set A total of eight control project.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
Validation test plan according to the discussion, mainly for inorganic chlorine, chlorine and easy saponification color 3 project validation tests have been carried out, the remaining five projects has long experience accumulation data, for the first meeting has determined the test methods and indexes, so the verification experiment was carried out. According to test results of the validation and advice, and ultimately determine the thermosetting powder coatings with bisphenol A type epoxy resin technical indicators of the project and the corresponding parameter values.
We chose to use solvent DMF and other sample experiment was carried out, to dissolve the DMF effect is best, some solvents for the dissolution of saturated polyester resin is not complete, can be completely dissolved after heating. So suggest to choose the right solvent DMF or agreed to dissolve sample, such as dissolving speed too slow or not completely dissolved sample, it can be heated slightly to transparent, then for testing.
Validation test choose two methods to test (platinum cobalt colorimetric method and colorimetric method), including platinum, cobalt colorimetric method can compare small differences between samples of different colors, and add's colorimetric method of different samples of tiny color difference cannot be reflected from the value, therefore the provisions of this standard platinum cobalt colorimetric method to determine resin color, determination method of GB/T 9282.1 2008.
In determination of acid value validation test, we choose 1:1 benzene/acetone mixed solvents, and THF/water mixed solvent DMF and sample test, the effect of the dissolution of DMF to, the other two mixed solvent dissolving speed slower. So the provisions of this standard to choose other suitable solvent DMF or agreed to dissolve sample, if the sample not completely dissolved, it can be heated slightly.
According to GB/T 6743-2008 method, the indicator method in A test, the results calculated according to 8.1.1 in GB/T 6743-6743.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
According to the validation test plan, we mainly to hydroxyl equivalent, melting process, volatile, total chloride content, epoxy chloropropane, residues and hydroxyl alkyl amide content 6 project is verified, the remaining three projects has long experience accumulation data, for the first meeting has determined the test methods and indexes, so the verification experiment was carried out. According to the results of the validation test and advice, ultimately determine the polyester powder coatings with crosslinking agent technical indicators of the project and the corresponding parameter values.
Thermosetting powder coating with unsaturated polyester resin, thermosetting powder coatings with bisphenol A type epoxy resin and polyester powder coating made of crosslinking agent for powder coating main raw materials, at the request of the unit using, increasing the application of the product performance requirements in the standard, namely by the parties agreed on the formulation, production technology of powder coating and coating should comply with the standard HG/T 2006 or any other agreed standards.
Thermosetting powder coating based on polyester resin with respect to its application performance is a very complex system, its production, processing and application properties are closely associated with polyester resin properties, formula design requires consideration of the resin molecular weight, functionality, glass transition temperature, melt viscosity and reactivity, physical and chemical parameters.
According to the actual quality status of domestic powder coatings with polyester resin and use requirements, combined with the projects set in relevant standards at home and abroad, this standard sets the seven control project. According to the validation test plan, we mainly on the acid value, hydroxyl value of polyester resin, color, and glass transition temperature, a total of four technical performance verification tests have been carried out.
The remaining three projects has long experience accumulation data, when the first meeting has been preliminarily determines the test method and index, so the verification experiment was carried out. According to the experiment data, and after repeated discussions and advice, finally determined the thermosetting powder coatings with saturated polyester resin technical indexes of the project and the corresponding parameter values.
According to the domestic thermosetting powder coating with the actual quality status of bisphenol A type epoxy resin, and the use of demand, combined with domestic and foreign relevant standard project Settings, and to determine the standard set A total of eight control project.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
Validation test plan according to the discussion, mainly for inorganic chlorine, chlorine and easy saponification color 3 project validation tests have been carried out, the remaining five projects has long experience accumulation data, for the first meeting has determined the test methods and indexes, so the verification experiment was carried out. According to test results of the validation and advice, and ultimately determine the thermosetting powder coatings with bisphenol A type epoxy resin technical indicators of the project and the corresponding parameter values.
We chose to use solvent DMF and other sample experiment was carried out, to dissolve the DMF effect is best, some solvents for the dissolution of saturated polyester resin is not complete, can be completely dissolved after heating. So suggest to choose the right solvent DMF or agreed to dissolve sample, such as dissolving speed too slow or not completely dissolved sample, it can be heated slightly to transparent, then for testing.
Validation test choose two methods to test (platinum cobalt colorimetric method and colorimetric method), including platinum, cobalt colorimetric method can compare small differences between samples of different colors, and add's colorimetric method of different samples of tiny color difference cannot be reflected from the value, therefore the provisions of this standard platinum cobalt colorimetric method to determine resin color, determination method of GB/T 9282.1 2008.
In determination of acid value validation test, we choose 1:1 benzene/acetone mixed solvents, and THF/water mixed solvent DMF and sample test, the effect of the dissolution of DMF to, the other two mixed solvent dissolving speed slower. So the provisions of this standard to choose other suitable solvent DMF or agreed to dissolve sample, if the sample not completely dissolved, it can be heated slightly.
According to GB/T 6743-2008 method, the indicator method in A test, the results calculated according to 8.1.1 in GB/T 6743-6743.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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