News Details
The powder coating resin crosslinking agent
2017-3-13 17:21:49
The powder coating resin crosslinking agent, through the research on the user and the analysis of the powder coating sample inspection or after analysis, we can start to powder coating formulation design, we should consider above all is decided to powder coating and coating properties of film forming matter of choice, the choice of resin and crosslinking agent is.
(1) according to the selected resin for powder coating and crosslinking agent varieties. Anti-corrosion way with the selection of epoxy resin powder type, general corrosion in the choice of common epoxy powder system.
Heavy-duty in the choice of phenolic modified epoxy resin in phenolic hydroxyl resin and promoter crosslinking system; Indoor decorative use generally choose polyester powder coating system, the performance requirements of coating film is high as far as possible choose polyester, epoxy for 50:50 (mass ratio, the same below) system.
DangTu membrane performance requirements is not high, the price is a lot higher than polyester resin, epoxy resin from raw materials costs, can choose polyester, epoxy is 60:40 or 70:30 system; Is often choose for outdoor products, pure polyester powder coating system.
For outdoor durability demanding as far as possible choose super weatherability polyester resin, with TGIC crosslinking system; If the requirements for powder coating toxicity are small, should choose crosslinking hydroxyl alkyl amide polyester powder coating system.
(2) according to user requirements for powder coating baking conditions of crosslinking and narrowed the scope of choosing crosslinking agent varieties. On this basis, select roasted crosslinking conditions of 180 ℃, 15 min, should choose to replace dicyandiamide epoxy powder coating and phenolic hydroxyl resin and promoter crosslinking system; Should choose polyester epoxy powder coating polyester resin chemical reactivity of the larger system; (pure polyester powder coating should choose hydroxyl alkyl amide crosslinking system.
(3) if the existing varieties of resin can not meet the user demand for baking crosslinking temperature and time, you can choose from resin manufacturers products suitable resin reactivity, also can choose suitable crosslinking promoter, add in producing powder coatings, to meet the requirements of users.
(4) from the coating appearance, require good flowing property should choose low melt viscosity of the resin, under the condition of baking crosslinking temperature, powder coating gel time is long, the level of molten liquidity big is better; But from the physical and mechanical properties of coating film, short gel time performance is good, but the corresponding flowing property of coating film is less
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
(5) for extinction powder coating, can choose different according to the requirement of the film gloss of extinction method. For matt and semi-gloss powder coatings, most use extinction crosslinking agent crosslinking system, make the crosslinking agent for more than 2 kinds of crosslinking system response speed and reaction products extinction effect of the compatibility between different.
In large amount of polyester epoxy powder coating system, the use of different acid number of polyester resin, epoxy resin and ring amidine carboxylic acid (anhydride) extinction crosslinking agent the different combination of ternary system to suit the requirements of any different luster.
In the (pure polyester powder coating, through extinction wax, extinction of crosslinking agent and extinction of acrylic resin and the activity of two different methods of powder paint dry mix half light or matt powder coatings. In the pure epoxy powder coating, through extinction crosslinking agent and acrylic matting resin crosslinking methods such as get half light or matt powder coatings.
Epoxy resin is mainly used for electrical appliances:
1. Electrical appliances, electrical insulation encapsulation of pouring. Such as the electromagnet, contactor coils, transformers, dry type transformer of high and low voltage electrical appliances, such as fully sealed insulation encapsulation pieces of manufacturing as a whole. Got rapid development in electronics industry. From the atmospheric pressure casting, vacuum casting has developed to the automatic pressure gel forming.
2. Widely used in electronic components and wiring devices, insulation potting. Has become indispensable to the electronics industry important insulation.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
(1) according to the selected resin for powder coating and crosslinking agent varieties. Anti-corrosion way with the selection of epoxy resin powder type, general corrosion in the choice of common epoxy powder system.
Heavy-duty in the choice of phenolic modified epoxy resin in phenolic hydroxyl resin and promoter crosslinking system; Indoor decorative use generally choose polyester powder coating system, the performance requirements of coating film is high as far as possible choose polyester, epoxy for 50:50 (mass ratio, the same below) system.
DangTu membrane performance requirements is not high, the price is a lot higher than polyester resin, epoxy resin from raw materials costs, can choose polyester, epoxy is 60:40 or 70:30 system; Is often choose for outdoor products, pure polyester powder coating system.
For outdoor durability demanding as far as possible choose super weatherability polyester resin, with TGIC crosslinking system; If the requirements for powder coating toxicity are small, should choose crosslinking hydroxyl alkyl amide polyester powder coating system.
(2) according to user requirements for powder coating baking conditions of crosslinking and narrowed the scope of choosing crosslinking agent varieties. On this basis, select roasted crosslinking conditions of 180 ℃, 15 min, should choose to replace dicyandiamide epoxy powder coating and phenolic hydroxyl resin and promoter crosslinking system; Should choose polyester epoxy powder coating polyester resin chemical reactivity of the larger system; (pure polyester powder coating should choose hydroxyl alkyl amide crosslinking system.
(3) if the existing varieties of resin can not meet the user demand for baking crosslinking temperature and time, you can choose from resin manufacturers products suitable resin reactivity, also can choose suitable crosslinking promoter, add in producing powder coatings, to meet the requirements of users.
(4) from the coating appearance, require good flowing property should choose low melt viscosity of the resin, under the condition of baking crosslinking temperature, powder coating gel time is long, the level of molten liquidity big is better; But from the physical and mechanical properties of coating film, short gel time performance is good, but the corresponding flowing property of coating film is less
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
(5) for extinction powder coating, can choose different according to the requirement of the film gloss of extinction method. For matt and semi-gloss powder coatings, most use extinction crosslinking agent crosslinking system, make the crosslinking agent for more than 2 kinds of crosslinking system response speed and reaction products extinction effect of the compatibility between different.
In large amount of polyester epoxy powder coating system, the use of different acid number of polyester resin, epoxy resin and ring amidine carboxylic acid (anhydride) extinction crosslinking agent the different combination of ternary system to suit the requirements of any different luster.
In the (pure polyester powder coating, through extinction wax, extinction of crosslinking agent and extinction of acrylic resin and the activity of two different methods of powder paint dry mix half light or matt powder coatings. In the pure epoxy powder coating, through extinction crosslinking agent and acrylic matting resin crosslinking methods such as get half light or matt powder coatings.
Epoxy resin is mainly used for electrical appliances:
1. Electrical appliances, electrical insulation encapsulation of pouring. Such as the electromagnet, contactor coils, transformers, dry type transformer of high and low voltage electrical appliances, such as fully sealed insulation encapsulation pieces of manufacturing as a whole. Got rapid development in electronics industry. From the atmospheric pressure casting, vacuum casting has developed to the automatic pressure gel forming.
2. Widely used in electronic components and wiring devices, insulation potting. Has become indispensable to the electronics industry important insulation.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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