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Epoxy powder is used to crosslinking agent with organic hydrazide
2017-9-2 17:15:44
Epoxy powder is used to crosslinking agent with organic hydrazide
Epoxy powder commonly used in organic hydrazide kind of crosslinking agent is usually by the reaction of dimethyl dibasic acid and hydrazine 2 hydrazide (dihydrazine), such as succinic acid hydrazide, adipic acid hydrazide, kwai, acid hydrazide, isophthalic acid hydrazide and the hydroxyl benzoic acid hydrazide (POPH), etc.
The melting point of organoyl hydrazine crosslinking agent was high, and the stability of the resin was dispersed, and the storage period at room temperature was over 4 months. Each two lively hydrazide molecule contains six hydrogen atoms (dicyandiamide has four), and the reaction of epoxy resin crosslinking density is high, thus can form a coating with high density, the foreign minister of the carbon chain dibasic acid hydrazide also gives the molecular structure of the coating is good flexibility.
Both hydrazide such as epoxy crosslinking agent alone, generally should be heated to above 160 ℃ can be quickly crosslinking, if cooperate with imidazoles accelerator, it can decrease the crosslinking temperature and achieve rapid crosslinking, used for the preparation of fast crosslinked epoxy powder anticorrosive coating of the outer wall of oil and gas pipelines. In addition, the dihydrazide can also be used as a crosslinking promoter for dicyandiamide.
Common varieties is aoi 2 acid hydrazide (185-190 ℃, melting point) dosage is 7%, the weight of the resin can be in 150-160 ℃ / 15-20 min, 170-180 ℃ / 10-15 min, 200-220 ℃ / 1-2 min under the conditions of crosslinking.
The coated film formed by crosslinking has good flexibility and density, and has a good yellowing ability, suitable for white or light powder. But the price of dihydrazide is high and toxic, limiting its wide application. Adipate hydrazide also often used as A crosslinking agent of bisphenol A epoxy resin, the preparation of good storage performance of the powder coating, can form good compactness and no pinhole coating, applied to the anticorrosion functional coating of steel tube wall.
Dihydrazide is also known as dihydrazide, pure white crystal, soluble in water, poisoning. It is mainly used in epoxy powder coating crosslinking agent and coating agent, metal reducing agent and other polymer additives and water treatment agent. With double function crosslinking reagent, it is specialized in aldehyde and produces relatively stable hydra link. It can be cross-linked with sodium hyaluronate as a protein drug carrier. The interaction between aqueous emulsion and water-soluble polymer in water emulsion was obtained. It can also be used as an indoor formaldehyde absorbent and intermediate material.
Chinese name: Diethyl toluene diamine(DETDA)
Epoxy powder commonly used in organic hydrazide kind of crosslinking agent is usually by the reaction of dimethyl dibasic acid and hydrazine 2 hydrazide (dihydrazine), such as succinic acid hydrazide, adipic acid hydrazide, kwai, acid hydrazide, isophthalic acid hydrazide and the hydroxyl benzoic acid hydrazide (POPH), etc.
The melting point of organoyl hydrazine crosslinking agent was high, and the stability of the resin was dispersed, and the storage period at room temperature was over 4 months. Each two lively hydrazide molecule contains six hydrogen atoms (dicyandiamide has four), and the reaction of epoxy resin crosslinking density is high, thus can form a coating with high density, the foreign minister of the carbon chain dibasic acid hydrazide also gives the molecular structure of the coating is good flexibility.
Both hydrazide such as epoxy crosslinking agent alone, generally should be heated to above 160 ℃ can be quickly crosslinking, if cooperate with imidazoles accelerator, it can decrease the crosslinking temperature and achieve rapid crosslinking, used for the preparation of fast crosslinked epoxy powder anticorrosive coating of the outer wall of oil and gas pipelines. In addition, the dihydrazide can also be used as a crosslinking promoter for dicyandiamide.
Common varieties is aoi 2 acid hydrazide (185-190 ℃, melting point) dosage is 7%, the weight of the resin can be in 150-160 ℃ / 15-20 min, 170-180 ℃ / 10-15 min, 200-220 ℃ / 1-2 min under the conditions of crosslinking.
The coated film formed by crosslinking has good flexibility and density, and has a good yellowing ability, suitable for white or light powder. But the price of dihydrazide is high and toxic, limiting its wide application. Adipate hydrazide also often used as A crosslinking agent of bisphenol A epoxy resin, the preparation of good storage performance of the powder coating, can form good compactness and no pinhole coating, applied to the anticorrosion functional coating of steel tube wall.
Dihydrazide is also known as dihydrazide, pure white crystal, soluble in water, poisoning. It is mainly used in epoxy powder coating crosslinking agent and coating agent, metal reducing agent and other polymer additives and water treatment agent. With double function crosslinking reagent, it is specialized in aldehyde and produces relatively stable hydra link. It can be cross-linked with sodium hyaluronate as a protein drug carrier. The interaction between aqueous emulsion and water-soluble polymer in water emulsion was obtained. It can also be used as an indoor formaldehyde absorbent and intermediate material.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
It is mainly used in epoxy powder coating crosslinking agent and coating agent, metal reducing agent and other polymer additives and water treatment agent.
The dihydrazide double functional group can be cross-linked with sodium hyaluronate as a protein drug carrier. And diacetone acrylamide in water emulsion and water soluble polymer crosslinked after crosslinking role, such as coating, adhesive, fiber and plastic processing, hair gel, etc., also can be used as a crosslinking agent and coating epoxy powder coating additives, metal attenuated agent and other polymer additives and water treatment agent, indoor formaldehyde adsorbent materials and intermediates.
With double function crosslinking reagent, it is specialized in aldehyde and produces relatively stable hydra link. Especially for the use of glycoproteins, such as antibodies.
Dihydrazide is a chemical that is C10H22N4O2.
Sebacate hydrazide (SPH) is a kind of high melting point compound powder, made by organic acid and hydrazine reaction. It can be used as coupling agent of epoxy resin (EP) latent intercourse. EP/SPH for viscous material system of powder coating film has very good flexibility, water resistance, weather resistance, corrosion resistance, insulation and decoration.
Because of the superior comprehensive performance of the system; In the decorative powder, insulation powder, smoldering powder, electrical powder, heavy-duty powder used in the well, in today's domestic and foreign, especially the manufacturing quality and high temperature fast heavy-duty powder and oil pipeline, spaceflight, aviation fuel, in areas such as indispensable latent sexual coupling agent. It is ideal to increase the strength of epoxy glue powder and glass reinforced plastic products.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
It is mainly used in epoxy powder coating crosslinking agent and coating agent, metal reducing agent and other polymer additives and water treatment agent.
The dihydrazide double functional group can be cross-linked with sodium hyaluronate as a protein drug carrier. And diacetone acrylamide in water emulsion and water soluble polymer crosslinked after crosslinking role, such as coating, adhesive, fiber and plastic processing, hair gel, etc., also can be used as a crosslinking agent and coating epoxy powder coating additives, metal attenuated agent and other polymer additives and water treatment agent, indoor formaldehyde adsorbent materials and intermediates.
With double function crosslinking reagent, it is specialized in aldehyde and produces relatively stable hydra link. Especially for the use of glycoproteins, such as antibodies.
Dihydrazide is a chemical that is C10H22N4O2.
Sebacate hydrazide (SPH) is a kind of high melting point compound powder, made by organic acid and hydrazine reaction. It can be used as coupling agent of epoxy resin (EP) latent intercourse. EP/SPH for viscous material system of powder coating film has very good flexibility, water resistance, weather resistance, corrosion resistance, insulation and decoration.
Because of the superior comprehensive performance of the system; In the decorative powder, insulation powder, smoldering powder, electrical powder, heavy-duty powder used in the well, in today's domestic and foreign, especially the manufacturing quality and high temperature fast heavy-duty powder and oil pipeline, spaceflight, aviation fuel, in areas such as indispensable latent sexual coupling agent. It is ideal to increase the strength of epoxy glue powder and glass reinforced plastic products.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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