News Details
Prepolymer coating crosslinking agent
2017-3-20 21:41:48
Prepolymer coating crosslinking agent,Earlier is the development of epoxy resin is one of the most widely used type thermosetting resin, the advent of more than half a century development, continuous improvement in coating, casting, molding and composite materials, adhesives, it can be found in, especially in recent years of epoxy matrix composites for the aerospace enterprise has made a great contribution, which has a lot to do with crosslinking agent to improve, today we introduce about polymer prepolymer as the types and characteristics of epoxy crosslinking agent.
Live with a wave of hydrogen groups can be used as the crosslinking agent of epoxy resin, such as amino, hydroxyl, phenolic hydroxyl and carboxyl, this after the modification of the crosslinking agent not only can improve the performance of epoxy resin itself, can also keep some properties of matrix, thus greatly improve the shortcomings of epoxy resin.
With amide resin as cross-linking agent, because of long carbon chain itself structure and the reasons of amino epoxy resin can be made after the fixed-line has certain flexibility and cohesive force, also produce certain effect of water, and has better technology and formula of the broadness, and heat in the epoxy resin is insufficient, resistant to chemicals and solvent, but because of the amide is a mixture of many ingredients, has also led to exist separately matched amino need longer secondary vulcanization time, therefore, the more used may be adhesive in the field of architecture.
With phenolic resin as cross-linking agent, due to the rigidity and large volume of benzene ring, can improve the heat resistance and mechanical strength of epoxy resin, is the advantage of the strengthening of the icing on the cake type epoxy itself, including resistance to chemicals, performance has improved. Defect is not low melting point, manufacturability, commonly used most may be laminated board, after a long chain ethers copolymerization can also be used as the coating industry.
Cross-linked with amino resins is the most prominent feature of good compatibility, don't even have to add diluents and plasticizer and other additives can achieve good mixing effect and manufacturability. Mainly used for coating with colour and lustre is shallow, color saturation, etc.
With carboxylic resin as a crosslinking agent is mainly the application of epoxy resin powder coating, the majority of carboxyl resin is unsaturated polyester resin containing carboxyl, by adjusting the molecular weight of resin, acid value, functionality, etc to realize the crosslink density control and toughening effect.
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.
Made from polyether amine diversity can also be crosslinking agent, its characteristic is to improve the impact strength of epoxy resin, toughening of implementation at the same time improve process conditions; Most amine ether is a low viscosity fluid, the class oligomer also can be used for raw materials of polyurea spraying.
Do with end amino polyurethane prepolymer epoxy crosslinking agent can bring high flexible epoxy resin, at the same time, has the very broad gel time adjustment, and good compatibility and manufacturability, but attention should be paid to the influence of moisture, the presence of water will make the crosslinking agent.
Finally add, epoxy resin and polyurethane, in the absence of fixed-line or between hardening is of no practical value, and only after the fixed-line form a three-dimensional network before they can become a thermosetting resin also have a practical application, there is no doubt that the selection of crosslinking agent and the quality is key, and now there is a wide variety of epoxy crosslinking agent and various modification, and even many crosslinking agent only, it is very difficult to detailed, only from the perspective of application or structure to introduce general.
Glycidyl ester type epoxy resin and the phenolic groups propane epoxy resin, it has low viscosity, use good manufacturability; High reactivity, Adhesive force is higher than general epoxy resin, curing material performance is good; Good electrical insulation; Good climate resistance and good temperature resistance, under the condition of ultra-low temperature, still have the bonding strength is higher than other types of epoxy resin. Have good surface gloss, pervious to light, good weatherability.
Glycidyl amine epoxy resin has the advantage of more functionality, high epoxy equivalent weight, crosslinking density, heat resistance increased significantly. Forward has been using glycidyl amine epoxy resin at home and abroad excellent adhesion and heat resistance, and to make the carbon fiber reinforced composite materials (CFRP) for aircraft secondary structure material.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Live with a wave of hydrogen groups can be used as the crosslinking agent of epoxy resin, such as amino, hydroxyl, phenolic hydroxyl and carboxyl, this after the modification of the crosslinking agent not only can improve the performance of epoxy resin itself, can also keep some properties of matrix, thus greatly improve the shortcomings of epoxy resin.
With amide resin as cross-linking agent, because of long carbon chain itself structure and the reasons of amino epoxy resin can be made after the fixed-line has certain flexibility and cohesive force, also produce certain effect of water, and has better technology and formula of the broadness, and heat in the epoxy resin is insufficient, resistant to chemicals and solvent, but because of the amide is a mixture of many ingredients, has also led to exist separately matched amino need longer secondary vulcanization time, therefore, the more used may be adhesive in the field of architecture.
With phenolic resin as cross-linking agent, due to the rigidity and large volume of benzene ring, can improve the heat resistance and mechanical strength of epoxy resin, is the advantage of the strengthening of the icing on the cake type epoxy itself, including resistance to chemicals, performance has improved. Defect is not low melting point, manufacturability, commonly used most may be laminated board, after a long chain ethers copolymerization can also be used as the coating industry.
Cross-linked with amino resins is the most prominent feature of good compatibility, don't even have to add diluents and plasticizer and other additives can achieve good mixing effect and manufacturability. Mainly used for coating with colour and lustre is shallow, color saturation, etc.
With carboxylic resin as a crosslinking agent is mainly the application of epoxy resin powder coating, the majority of carboxyl resin is unsaturated polyester resin containing carboxyl, by adjusting the molecular weight of resin, acid value, functionality, etc to realize the crosslink density control and toughening effect.
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.
Made from polyether amine diversity can also be crosslinking agent, its characteristic is to improve the impact strength of epoxy resin, toughening of implementation at the same time improve process conditions; Most amine ether is a low viscosity fluid, the class oligomer also can be used for raw materials of polyurea spraying.
Do with end amino polyurethane prepolymer epoxy crosslinking agent can bring high flexible epoxy resin, at the same time, has the very broad gel time adjustment, and good compatibility and manufacturability, but attention should be paid to the influence of moisture, the presence of water will make the crosslinking agent.
Finally add, epoxy resin and polyurethane, in the absence of fixed-line or between hardening is of no practical value, and only after the fixed-line form a three-dimensional network before they can become a thermosetting resin also have a practical application, there is no doubt that the selection of crosslinking agent and the quality is key, and now there is a wide variety of epoxy crosslinking agent and various modification, and even many crosslinking agent only, it is very difficult to detailed, only from the perspective of application or structure to introduce general.
Glycidyl ester type epoxy resin and the phenolic groups propane epoxy resin, it has low viscosity, use good manufacturability; High reactivity, Adhesive force is higher than general epoxy resin, curing material performance is good; Good electrical insulation; Good climate resistance and good temperature resistance, under the condition of ultra-low temperature, still have the bonding strength is higher than other types of epoxy resin. Have good surface gloss, pervious to light, good weatherability.
Glycidyl amine epoxy resin has the advantage of more functionality, high epoxy equivalent weight, crosslinking density, heat resistance increased significantly. Forward has been using glycidyl amine epoxy resin at home and abroad excellent adhesion and heat resistance, and to make the carbon fiber reinforced composite materials (CFRP) for aircraft secondary structure material.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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