News Details
Coating crosslinking temperature of crosslinking agent
2017-3-16 16:49:10
Coating crosslinking temperature of crosslinking agent,A variety of different crosslinking temperature of crosslinking agent, the crosslinking of heat resistance is different also. Generally speaking, the use of high crosslinking temperature of crosslinking agent can get excellent heat-resistant crosslinking. For addition polymerization crosslinking agent, crosslinking temperature and the heat resistance increase in the following order:
Fatty polyamine < alicyclic amine more phenolic < < more aromatic amine material anhydride
Heat resistance of type catalytic addition polymerization crosslinking agent is generally in the fragrant polyamine levels. Type anionic polymerization (tertiary amine and imidazole antiquities), cationic polymerization (BF3 complex) heat resistance is basically the same, this is mainly from the reaction mechanism is different, but in the end all the reticular structure of ether bond.
Crosslinking reaction belongs to the chemical reaction, is highly affected by the crosslinking temperature, higher temperature, reaction speed, gel time shorter; Gel time of numerical crosslinking temperature rise roughly in a straight line down trend. But crosslinking temperature is exorbitant, often make crosslinking performance degradation, so the existence of the crosslinking temperature limit; Must choose the crosslinking rate and crosslinking temperature performance tradeoffs, as proper crosslinking temperature.
Crosslinking agent at the crosslinking temperature can be divided into four categories: low temperature crosslinking agent crosslinking temperature under room temperature; Room temperature cross-linking agent crosslinking temperature to room temperature ~ 50 ℃; Medium temperature crosslinking agent is 50 ~ 100 ℃; High temperature cross-linking agent crosslinking temperature above 100 ℃. Belong to the type of low temperature crosslinking crosslinking agent varieties are very few, have gathered ryukyu and alcohol, more isocyanate, etc.;
In recent years, the domestic production of T - 31 of modified amine, YH - 82 modified amine under 0 ℃ crosslinking. Belong to many different kinds of room temperature crosslinking type: aliphatic amine and alicyclic amine; Low molecular polyamide and modified aromatic amine etc.
Belongs to the medium temperature crosslinking type has a part alicyclic amine and tertiary amine and narrow azole and boron trifluoride complex, etc. Belong to the type of high temperature of crosslinking agent has more aromatic amine, anhydride, JiaJie phenolic resin, amino resin, the dicyandiamide and hydrazide.
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.
For high temperature crosslinking system, crosslinking temperature is generally divided into two stages, using low temperature crosslinking, in front of the gel in gel or a bit higher than the gel state of the state, after high temperature heating again after crosslinking (post - cure), relative period before hand in the middle to prepay (pre - cure).
Paint regardless of variety or forms, are made by film-forming substances, secondary film-forming material and auxiliary film-forming substance of three basic components. Paint the secondary film-forming substances including all kinds of pigment, extender pigment, antirust paint. Auxiliary film-forming material includes a variety of additives, solvent, various additives in paint production process, storage and use process, and the formation process of film plays a very important role. Although use quantity are few, but a strong impact on the performance of the paint film.
Not form even paint film, such as: not stem, sink agglomerate, crust. Water-based paint need more additives can satisfy the production, construction, storage and form a film. The level of paint additives also represents the level of the paint. Solvent is also called "dispersing medium" (including all kinds of organic solvent, water) main dilution film-forming substances to form a viscous liquid, so that the production and construction. Often called a mixture of film-forming makings and dispersion medium paint.
Without solvent colored formula in the evaluation the performance of the paint recipe, such as hardness, form, color stability and corrosion resistance. Basic material 1 # liquid containing bisphenol A epoxy resin and the functional groups of diluent, and basic material of 2 # contains dilution of bisphenol A and liquid epoxy resin of bisphenol F blends. The two different epoxy resin binders formula covers the protection commonly used in the coating resin mixture. Between the phenolic amides and two kinds of epoxy resin binders showed excellent compatibility, can provide the highlights of the smooth surface.
Respectively according to ASTM D4366 partha and ASTM D2240 evaluation and the formation of shaw D hardness. Due to its high relative molecular mass and high officials, expect the phenolic acid will have this kind of performance. For some crosslinking agent, under low temperature, hardness is significantly affected by moisture.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Fatty polyamine < alicyclic amine more phenolic < < more aromatic amine material anhydride
Heat resistance of type catalytic addition polymerization crosslinking agent is generally in the fragrant polyamine levels. Type anionic polymerization (tertiary amine and imidazole antiquities), cationic polymerization (BF3 complex) heat resistance is basically the same, this is mainly from the reaction mechanism is different, but in the end all the reticular structure of ether bond.
Crosslinking reaction belongs to the chemical reaction, is highly affected by the crosslinking temperature, higher temperature, reaction speed, gel time shorter; Gel time of numerical crosslinking temperature rise roughly in a straight line down trend. But crosslinking temperature is exorbitant, often make crosslinking performance degradation, so the existence of the crosslinking temperature limit; Must choose the crosslinking rate and crosslinking temperature performance tradeoffs, as proper crosslinking temperature.
Crosslinking agent at the crosslinking temperature can be divided into four categories: low temperature crosslinking agent crosslinking temperature under room temperature; Room temperature cross-linking agent crosslinking temperature to room temperature ~ 50 ℃; Medium temperature crosslinking agent is 50 ~ 100 ℃; High temperature cross-linking agent crosslinking temperature above 100 ℃. Belong to the type of low temperature crosslinking crosslinking agent varieties are very few, have gathered ryukyu and alcohol, more isocyanate, etc.;
In recent years, the domestic production of T - 31 of modified amine, YH - 82 modified amine under 0 ℃ crosslinking. Belong to many different kinds of room temperature crosslinking type: aliphatic amine and alicyclic amine; Low molecular polyamide and modified aromatic amine etc.
Belongs to the medium temperature crosslinking type has a part alicyclic amine and tertiary amine and narrow azole and boron trifluoride complex, etc. Belong to the type of high temperature of crosslinking agent has more aromatic amine, anhydride, JiaJie phenolic resin, amino resin, the dicyandiamide and hydrazide.
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.
For high temperature crosslinking system, crosslinking temperature is generally divided into two stages, using low temperature crosslinking, in front of the gel in gel or a bit higher than the gel state of the state, after high temperature heating again after crosslinking (post - cure), relative period before hand in the middle to prepay (pre - cure).
Paint regardless of variety or forms, are made by film-forming substances, secondary film-forming material and auxiliary film-forming substance of three basic components. Paint the secondary film-forming substances including all kinds of pigment, extender pigment, antirust paint. Auxiliary film-forming material includes a variety of additives, solvent, various additives in paint production process, storage and use process, and the formation process of film plays a very important role. Although use quantity are few, but a strong impact on the performance of the paint film.
Not form even paint film, such as: not stem, sink agglomerate, crust. Water-based paint need more additives can satisfy the production, construction, storage and form a film. The level of paint additives also represents the level of the paint. Solvent is also called "dispersing medium" (including all kinds of organic solvent, water) main dilution film-forming substances to form a viscous liquid, so that the production and construction. Often called a mixture of film-forming makings and dispersion medium paint.
Without solvent colored formula in the evaluation the performance of the paint recipe, such as hardness, form, color stability and corrosion resistance. Basic material 1 # liquid containing bisphenol A epoxy resin and the functional groups of diluent, and basic material of 2 # contains dilution of bisphenol A and liquid epoxy resin of bisphenol F blends. The two different epoxy resin binders formula covers the protection commonly used in the coating resin mixture. Between the phenolic amides and two kinds of epoxy resin binders showed excellent compatibility, can provide the highlights of the smooth surface.
Respectively according to ASTM D4366 partha and ASTM D2240 evaluation and the formation of shaw D hardness. Due to its high relative molecular mass and high officials, expect the phenolic acid will have this kind of performance. For some crosslinking agent, under low temperature, hardness is significantly affected by moisture.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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