News Details
Powder coating reactivity of crosslinking agent
2017-3-12 22:57:01
Powder coating reactivity of crosslinking agent,The heavy-duty powder coatings used at home and abroad mainly macromolecular crosslinking agent type end hydroxyl polymer crosslinking agent, such as phenol adduct, linear phenolic resin with epoxy compound, etc.
The macromolecular crosslinking agent and epoxy resin with similar structure, it has good compatibility with epoxy resin, the crosslinking of powder coating has good flexibility, deficiency is low reactivity, especially in the late reaction system viscosity increased, due to the curly package of active reaction end group is difficult to participate in the reaction.
As we all know, powder coating is a new kind of, does not contain any solvents, hundred of solid powder coatings. Mainly consists of special resin, fillers, crosslinking agent and other auxiliaries, mixed at a certain proportion, then by hot extrusion and crushing sieving process preparation.
At room temperature, they storage stability, and the friction electrostatic spraying, spraying thermosetting (method) or fluidized bed dip coating (thermoplastic method), and then heated baking molten crosslinking, make form a smooth and shining permanent coating, to achieve the purpose of decoration and corrosion resistance.
In order to improve the reactivity of macromolecular crosslinking agent, to meet the requirements of rapid crosslinking and crosslinking agent in powder coating structure tend to join in the design of small molecular polyol and catalyst to improve the response speed.
Different crosslinking agent manufacturer of powder coating on the choice of polyol, molecular weight, size, the type and dosage of catalyst is confidential. These parameters of crosslinking agent from different crosslinking effect is also different. We are in the process of development, according to the different ways of painting work and coating performance requirements developed a series of crosslinking agent, can meet the requirements of different applications.
Through the effects of resin, crosslinking agent and catalyst on various physical and chemical properties of polyurethane powder coating, the influence of selecting proper resin and crosslinking agent for polyurethane has a vital influence the performance of the powder coating, adding suitable additives can largely improve the performance of the coating, the appropriate formula can maximize the cost savings. Strict operating process can reduce unnecessary waste, increase production capacity, improve the economic benefit.
In powder coating formulation, flatting agent is through the physical, extinction crosslinking agent is through chemical reaction, make the extinction of powder coating additives.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
Matting agent extinction effect mainly through matting agent and film-forming material compatibility between bad, mainly is the physical effect. Extinction by physical method and the use of extinction packing, such as extinction barium, kaolin, wollastonite, etc; You can also use the matting resin method is effective. The extinction of this physical extinction method amplitude range is narrow, especially with extinction packing extinction method, can only apply Yu Guangze range of low to about 60% (60).
Extinction crosslinking agent extinction principle is to use two different reactive system of crosslinking agent, as one of the system of crosslinking reaction activity, reaction speed, another system of crosslinking reaction activity of small, slow reaction, two kinds of powder coating film forming matter system and reaction rate differences between the difference of compatibility between the two kinds of reaction products, form the onlookers rough surface on the diffuse reflection and scattering light, and weak reflection power coating of extinction.
In the crosslinking reaction, two kinds of reaction system produce interpenetrating network structure, make the film produces extinction effect also have relations. Extinction crosslinking agent is special varieties of flatting agent, in the process of powder coating film, as part of the crosslinking agent in chemical crosslinking reaction, on the resin, crosslinking agent (or combined resin) the adjustment of the dosage of crosslinking agent and extinction, gloss coating is easy to control, the luster of the coating has good stability, gloss over a wide range.
Carboxyl polyester powder coatings with different melamine urea acid three glycidyl ester (TGIC) and hydroxyl alkyl amide (HAA) crosslinking agent. Hydroxyl alkyl amide (HAA) crosslinking agent refers to the main components in N, N ', N '- four hydroxyethyl adipic acid hydroxyl alkyl amide.
According to the carboxyl polyester powder coatings in the composition of the crosslinking agent, can be divided into three different melamine urea acid glycidyl ester (TGIC) and hydroxyl alkyl amide (HAA) two types.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The macromolecular crosslinking agent and epoxy resin with similar structure, it has good compatibility with epoxy resin, the crosslinking of powder coating has good flexibility, deficiency is low reactivity, especially in the late reaction system viscosity increased, due to the curly package of active reaction end group is difficult to participate in the reaction.
As we all know, powder coating is a new kind of, does not contain any solvents, hundred of solid powder coatings. Mainly consists of special resin, fillers, crosslinking agent and other auxiliaries, mixed at a certain proportion, then by hot extrusion and crushing sieving process preparation.
At room temperature, they storage stability, and the friction electrostatic spraying, spraying thermosetting (method) or fluidized bed dip coating (thermoplastic method), and then heated baking molten crosslinking, make form a smooth and shining permanent coating, to achieve the purpose of decoration and corrosion resistance.
In order to improve the reactivity of macromolecular crosslinking agent, to meet the requirements of rapid crosslinking and crosslinking agent in powder coating structure tend to join in the design of small molecular polyol and catalyst to improve the response speed.
Different crosslinking agent manufacturer of powder coating on the choice of polyol, molecular weight, size, the type and dosage of catalyst is confidential. These parameters of crosslinking agent from different crosslinking effect is also different. We are in the process of development, according to the different ways of painting work and coating performance requirements developed a series of crosslinking agent, can meet the requirements of different applications.
Through the effects of resin, crosslinking agent and catalyst on various physical and chemical properties of polyurethane powder coating, the influence of selecting proper resin and crosslinking agent for polyurethane has a vital influence the performance of the powder coating, adding suitable additives can largely improve the performance of the coating, the appropriate formula can maximize the cost savings. Strict operating process can reduce unnecessary waste, increase production capacity, improve the economic benefit.
In powder coating formulation, flatting agent is through the physical, extinction crosslinking agent is through chemical reaction, make the extinction of powder coating additives.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
Matting agent extinction effect mainly through matting agent and film-forming material compatibility between bad, mainly is the physical effect. Extinction by physical method and the use of extinction packing, such as extinction barium, kaolin, wollastonite, etc; You can also use the matting resin method is effective. The extinction of this physical extinction method amplitude range is narrow, especially with extinction packing extinction method, can only apply Yu Guangze range of low to about 60% (60).
Extinction crosslinking agent extinction principle is to use two different reactive system of crosslinking agent, as one of the system of crosslinking reaction activity, reaction speed, another system of crosslinking reaction activity of small, slow reaction, two kinds of powder coating film forming matter system and reaction rate differences between the difference of compatibility between the two kinds of reaction products, form the onlookers rough surface on the diffuse reflection and scattering light, and weak reflection power coating of extinction.
In the crosslinking reaction, two kinds of reaction system produce interpenetrating network structure, make the film produces extinction effect also have relations. Extinction crosslinking agent is special varieties of flatting agent, in the process of powder coating film, as part of the crosslinking agent in chemical crosslinking reaction, on the resin, crosslinking agent (or combined resin) the adjustment of the dosage of crosslinking agent and extinction, gloss coating is easy to control, the luster of the coating has good stability, gloss over a wide range.
Carboxyl polyester powder coatings with different melamine urea acid three glycidyl ester (TGIC) and hydroxyl alkyl amide (HAA) crosslinking agent. Hydroxyl alkyl amide (HAA) crosslinking agent refers to the main components in N, N ', N '- four hydroxyethyl adipic acid hydroxyl alkyl amide.
According to the carboxyl polyester powder coatings in the composition of the crosslinking agent, can be divided into three different melamine urea acid glycidyl ester (TGIC) and hydroxyl alkyl amide (HAA) two types.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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