News Details
Coating crosslinking agent requirements
2017-5-3 16:26:06
Coating crosslinking agent requirements:
(1) the normal temperature is solid
(2) no reaction occurs when the resin melts.
(3) the storage stability of the coating is good, the crosslinking temperature is low, the crosslinking time is short.
(4) non-irritating stench and toxicity.
(5) it won't color the paint.
(6) the price is cheap.
In epoxy powder coating film is epoxy resins and crosslinking agent, the two compounds at room temperature without chemical reaction, but under the condition of the powder coating baking crosslinking temperature, chemical reaction, and crosslinked couplet membrane, become has certain physical and mechanical properties, chemical resistance is also very good polymer coating.
It is well known that the reactive groups in epoxy resins are mainly epoxy (or glycogenyl), as well as hydroxyl; In the crosslinking agent, the crosslinking agent is very different.
Crosslinking agent, reactive groups vary, but is the main reactive groups can react with epoxy group in the active hydrogen (amine hydrogen nitrogen base), such as dicyandiamide, sebacate hydrazide lively base; A carboxyl group that can react with epoxy, such as a carboxylic acid in a polyester resin; The acid anhydride base that can react with the hydroxyl reaction in epoxy resin, such as the acid anhydride base of diphenylketone tetraformate.
Main reaction is the epoxy groups of epoxy resin with amine or acyl amino between the active hydrogen addition reaction, generate hydroxyl groups, the hydroxyl and the reaction between the hydroxyl can also generate ether bond and water, and make the generated polymers, also is the crosslinking density increased, film forming matter become good coating performance.
First with diphenyl ketone hydroxyl of the epoxy resin tetracarboxylic acid dianhydride anhydride reaction of carboxyl compound, and then the carboxylic compounds of carboxyl generated ester with epoxy groups of epoxy resin response, finally produce polymer coating.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
Hazard Class: 6.1
Progress in epoxy powder coating. Epoxy powder coating for more than 20 years, our country went through a process of gradually improve improve, continuously improve performance, increasing varieties, mainly manifested in the following several aspects.
(1) the spread of the coating and the continuous improvement of the gloss. The coating of epoxy powder coating in the early stage is general, the luster is only about 70%, the coating is smooth and smooth, the gloss can reach more than 95%.
The adhesion and mechanical strength of the coating were significantly improved. In the early 1980 s, domestic epoxy powder paint coating adhesion, resistance to impact usually only 392 n. cm level, adhesion are now in the primary level, resistance to impact not only prove that up to 490 n · cm, negative impact also can achieve 490 n. cm
(3) the coating is bright in color and can match the oil paint. Early epoxy powder coating is the white paint is not white, light color paint is not gorgeous, now the varieties in white and light color such as the difficulty of high powder can reach a higher level in the category.
(4) various kinds of products derived from epoxy powder coating are developed rapidly, such as anti-corrosion type, insulation type, fine art pattern and so on.
(5) the various raw materials that correspond to it are progressing rapidly. The epoxy resin was transferred from the original generic variety to the powder special type, and the production process has been greatly improved.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
(1) the normal temperature is solid
(2) no reaction occurs when the resin melts.
(3) the storage stability of the coating is good, the crosslinking temperature is low, the crosslinking time is short.
(4) non-irritating stench and toxicity.
(5) it won't color the paint.
(6) the price is cheap.
In epoxy powder coating film is epoxy resins and crosslinking agent, the two compounds at room temperature without chemical reaction, but under the condition of the powder coating baking crosslinking temperature, chemical reaction, and crosslinked couplet membrane, become has certain physical and mechanical properties, chemical resistance is also very good polymer coating.
It is well known that the reactive groups in epoxy resins are mainly epoxy (or glycogenyl), as well as hydroxyl; In the crosslinking agent, the crosslinking agent is very different.
Crosslinking agent, reactive groups vary, but is the main reactive groups can react with epoxy group in the active hydrogen (amine hydrogen nitrogen base), such as dicyandiamide, sebacate hydrazide lively base; A carboxyl group that can react with epoxy, such as a carboxylic acid in a polyester resin; The acid anhydride base that can react with the hydroxyl reaction in epoxy resin, such as the acid anhydride base of diphenylketone tetraformate.
Main reaction is the epoxy groups of epoxy resin with amine or acyl amino between the active hydrogen addition reaction, generate hydroxyl groups, the hydroxyl and the reaction between the hydroxyl can also generate ether bond and water, and make the generated polymers, also is the crosslinking density increased, film forming matter become good coating performance.
First with diphenyl ketone hydroxyl of the epoxy resin tetracarboxylic acid dianhydride anhydride reaction of carboxyl compound, and then the carboxylic compounds of carboxyl generated ester with epoxy groups of epoxy resin response, finally produce polymer coating.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
Hazard Class: 6.1
Progress in epoxy powder coating. Epoxy powder coating for more than 20 years, our country went through a process of gradually improve improve, continuously improve performance, increasing varieties, mainly manifested in the following several aspects.
(1) the spread of the coating and the continuous improvement of the gloss. The coating of epoxy powder coating in the early stage is general, the luster is only about 70%, the coating is smooth and smooth, the gloss can reach more than 95%.
The adhesion and mechanical strength of the coating were significantly improved. In the early 1980 s, domestic epoxy powder paint coating adhesion, resistance to impact usually only 392 n. cm level, adhesion are now in the primary level, resistance to impact not only prove that up to 490 n · cm, negative impact also can achieve 490 n. cm
(3) the coating is bright in color and can match the oil paint. Early epoxy powder coating is the white paint is not white, light color paint is not gorgeous, now the varieties in white and light color such as the difficulty of high powder can reach a higher level in the category.
(4) various kinds of products derived from epoxy powder coating are developed rapidly, such as anti-corrosion type, insulation type, fine art pattern and so on.
(5) the various raw materials that correspond to it are progressing rapidly. The epoxy resin was transferred from the original generic variety to the powder special type, and the production process has been greatly improved.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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