News Details
Plus paint crosslinking agent
2017-5-18 17:49:20
Plus paint crosslinking agent
Although the use of polyhydric alcohol or more isocyanate slightly crosslinked polyurethane can be prepared, but this method between two junction should not be greater than 4000, the relative molecular mass of the viscosity is too large, otherwise the system into membranous will decline. Aqueous polyurethane dispersions can also be used with other methods of water-based polymer mutually crosslinking, and crosslinking reaction in anionic waterborne polyurethane mostly concentrated in the carboxylic acid.
The use of crosslinking agent is mainly nitropropyl, especially the tri-functional group nitropropyl, melamine-formaldehyde resin, etc. N propyl organism must join before use, because it is in the water and stored at room temperature 2 days later loss of activity, its advantage is in low temperature can crosslinking, but this type of product has a certain toxicity. Melamine-formaldehyde is used as crosslinking agent, especially in acrylic polymers.
The crosslinking can also be carried out by sealing isocyanate. Sealing and isocyanate is to guard the isocyanate group and lose it at room temperature reactivity, when heat sealing agent parsing, to restore its reactivity.
Sealing and isocyanate is widely used as a general and waterborne polyurethane crosslinker, such polyurethane dispersions both can be used as a single component coating and the preparation of various crosslinking degree of the product, but need to dry in the film.
Recently, the curative solidification of water base materials has become a new direction. As a result, the amount of acrylic monomer as a reactive diluent can be reduced or not, and the solidified product can have better physical properties.
Also can be used as plus crosslinking agent: alkane oxidation melamine - formaldehyde, sodium carnauba, multifunctional cyano amide, three glycidyl ether, epoxy crosslinking agent, etc. Other new, more advantageous crosslinking agents are also being studied.
In addition, there are a number of different chemical modification methods, one of which is a good way to synthesize a single component polyurethane system with a potential curing agent.
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.
Effective potential can curing agent and polymer hydrophilic neutral reaction of ions, and can control the curing reactions in use only, and will not affect the stability of the dispersion.
It's an ideal compound. It can not only react with the compounds that contain carboxyl or hydroxyl, but also be able to react to the formation of the homopolymer at ambient temperature and acidity. In an alkaline solution, it stabilizes, so the solidification response can be triggered by adjusting pH.
The special enhancement of adhesives is a kind of high polymer compound, which can increase the wettability and flow of the substrate. Is to improve the adhesive resin, polymer molecules and the combined strength of base material and increases its tensile force, at the same time improve the uniformity of the stress of the cured resin molecules and crosslinking density and intensity of crosslinking. This increases the bonding strength of the adhesive. For some products not only can improve the strength, can also improve water resistance (such as chloroprene latex added 1% can improve the resistance of the bonded to the surface of the water above 10 times, increase at the beginning of the viscous force and also with the permeability of base material, etc.)
All you need to do is mix the adhesive with the adhesive, the epoxy, the acrylic (the structure), and the organic silicone resin mixture ratio of 2%.
Rubber, SBS, phenolic, and polyurethane mixed with 1%
The strengthening agent containing chelating agent and crosslinking agent, the adhesive can react with the resin in the process of curing strength good crosslinking resin group, formed by chemical crosslinking good bonding strength.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Although the use of polyhydric alcohol or more isocyanate slightly crosslinked polyurethane can be prepared, but this method between two junction should not be greater than 4000, the relative molecular mass of the viscosity is too large, otherwise the system into membranous will decline. Aqueous polyurethane dispersions can also be used with other methods of water-based polymer mutually crosslinking, and crosslinking reaction in anionic waterborne polyurethane mostly concentrated in the carboxylic acid.
The use of crosslinking agent is mainly nitropropyl, especially the tri-functional group nitropropyl, melamine-formaldehyde resin, etc. N propyl organism must join before use, because it is in the water and stored at room temperature 2 days later loss of activity, its advantage is in low temperature can crosslinking, but this type of product has a certain toxicity. Melamine-formaldehyde is used as crosslinking agent, especially in acrylic polymers.
The crosslinking can also be carried out by sealing isocyanate. Sealing and isocyanate is to guard the isocyanate group and lose it at room temperature reactivity, when heat sealing agent parsing, to restore its reactivity.
Sealing and isocyanate is widely used as a general and waterborne polyurethane crosslinker, such polyurethane dispersions both can be used as a single component coating and the preparation of various crosslinking degree of the product, but need to dry in the film.
Recently, the curative solidification of water base materials has become a new direction. As a result, the amount of acrylic monomer as a reactive diluent can be reduced or not, and the solidified product can have better physical properties.
Also can be used as plus crosslinking agent: alkane oxidation melamine - formaldehyde, sodium carnauba, multifunctional cyano amide, three glycidyl ether, epoxy crosslinking agent, etc. Other new, more advantageous crosslinking agents are also being studied.
In addition, there are a number of different chemical modification methods, one of which is a good way to synthesize a single component polyurethane system with a potential curing agent.
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.
Effective potential can curing agent and polymer hydrophilic neutral reaction of ions, and can control the curing reactions in use only, and will not affect the stability of the dispersion.
It's an ideal compound. It can not only react with the compounds that contain carboxyl or hydroxyl, but also be able to react to the formation of the homopolymer at ambient temperature and acidity. In an alkaline solution, it stabilizes, so the solidification response can be triggered by adjusting pH.
The special enhancement of adhesives is a kind of high polymer compound, which can increase the wettability and flow of the substrate. Is to improve the adhesive resin, polymer molecules and the combined strength of base material and increases its tensile force, at the same time improve the uniformity of the stress of the cured resin molecules and crosslinking density and intensity of crosslinking. This increases the bonding strength of the adhesive. For some products not only can improve the strength, can also improve water resistance (such as chloroprene latex added 1% can improve the resistance of the bonded to the surface of the water above 10 times, increase at the beginning of the viscous force and also with the permeability of base material, etc.)
All you need to do is mix the adhesive with the adhesive, the epoxy, the acrylic (the structure), and the organic silicone resin mixture ratio of 2%.
Rubber, SBS, phenolic, and polyurethane mixed with 1%
The strengthening agent containing chelating agent and crosslinking agent, the adhesive can react with the resin in the process of curing strength good crosslinking resin group, formed by chemical crosslinking good bonding strength.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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