News Details
Water emulsion coating crosslinking agent
2017-6-2 16:11:02
Water emulsion coating crosslinking agent
The quality of water emulsifying paint depends first on the film, and only good paint can do its job.
Water emulsion coating emulsion polymer in the water, after construction moisture volatilizes, reach the phase inversion point that is, from O/W) (oil-in-water type emulsion turn each other W/O type (water-in-oil emulsion and make polymer touch each other. In moisture volatilizes continue by capillary force and coalescence, penetrating each other become uniform continuous membrane, its speed depends on the environment temperature and relative humidity, and mobility of polymer (mobility).
The crosslinking of water emulsifying crosslinked coatings will cause the polymer's liquidity to decline, and as the crosslinking is carried out, it will affect the quality of the membrane. The ideal is to form a membrane and then crosslink. Water emulsified uv light curing coating is applied to solidify the abrasion resistance of paint film with different lag time after coating. It is important to improve the quality of lacquer film.
Drying oil modified resin emulsion, such as drying oil alkyd resin and acrylic modified resin, is through the oxidation drying and crosslinking, so have enough before the cross-linking of film forming time, the performance of the paint film is close to the same kind of solvent coatings.
For not after the first film crosslinked coating (e.g., waterborne epoxy coatings), only by improve the film forming speed and reduce the crosslinking speed to improve the film performance.
By improving the curing agent of epoxy resin with compatible and liquidity, reduce the curing agent of epoxy resin with crosslinking speed, such as low water insoluble primary amine hydrogen amine adduct made of epoxy emulsion, improve the liquidity of epoxy resin with appropriate solvent. In this way, after mixing the two components, the contact can only begin after the emulsion is turned, and the crosslinking speed slows down, making the whole film more uniform.
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.
The development of research and development of water-based thickener, which is used to regulate water fractional system rheology, develops rapidly. Water based thickening agent can be divided into non-associative and associative thickener according to its thickening mechanism. The former thickener not hydrophobic modification monomer, and be no association between thickening polymer molecules, mainly through the polymer after alkali soluble thickener and thickening, sometimes after alkali soluble by mild/linked the water to form a certain network structure to implement the thickening.
In contrast, the associated thickening agent is typically a polymer that USES hydrophobic groups of functional monomers to hydrophobic polymer with non-associative thickening agents. Such thickening agent or between hydrophobic groups on the molecular chain with the thickening of polymer or inorganic particles can produce association between the use, so as to realize the system regulation of rheology.
In the 1980s, the Emmons prepared a water-based coating thickener, using n-long alkyl functional monomers and acrylamide copolymerization methods. Also have literature reported by inverse emulsion polymerization using long chain methyl acrylate modified monomer preparation of hydrophobic modification of association thickener, and examines the monomers on the properties of thickener. In recent years, there has been a growing number of research reports on the development of new products, including the development of new products and applications in different fields.
Crosslinking agent is often used in thickening agent synthesis. In addition to the thickening effect of the thickening agent, the addition of crosslinking agent is more important to enhance its ability to resist shear. But there is a literature indicating that the addition of crosslinking agents often results in reduced thickening effects.
To use 22 alkyl polyoxyethylene ether methacrylate (BEM) as the hydrophobic functional monomer, change the content of crosslinking agent was prepared by a series of acrylic type association thickener, through the characterization of the performance of thickener, explore the crosslinking agent on the properties of thickener, to determine the association type thickener in the suitable content of crosslinking agent.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The quality of water emulsifying paint depends first on the film, and only good paint can do its job.
Water emulsion coating emulsion polymer in the water, after construction moisture volatilizes, reach the phase inversion point that is, from O/W) (oil-in-water type emulsion turn each other W/O type (water-in-oil emulsion and make polymer touch each other. In moisture volatilizes continue by capillary force and coalescence, penetrating each other become uniform continuous membrane, its speed depends on the environment temperature and relative humidity, and mobility of polymer (mobility).
The crosslinking of water emulsifying crosslinked coatings will cause the polymer's liquidity to decline, and as the crosslinking is carried out, it will affect the quality of the membrane. The ideal is to form a membrane and then crosslink. Water emulsified uv light curing coating is applied to solidify the abrasion resistance of paint film with different lag time after coating. It is important to improve the quality of lacquer film.
Drying oil modified resin emulsion, such as drying oil alkyd resin and acrylic modified resin, is through the oxidation drying and crosslinking, so have enough before the cross-linking of film forming time, the performance of the paint film is close to the same kind of solvent coatings.
For not after the first film crosslinked coating (e.g., waterborne epoxy coatings), only by improve the film forming speed and reduce the crosslinking speed to improve the film performance.
By improving the curing agent of epoxy resin with compatible and liquidity, reduce the curing agent of epoxy resin with crosslinking speed, such as low water insoluble primary amine hydrogen amine adduct made of epoxy emulsion, improve the liquidity of epoxy resin with appropriate solvent. In this way, after mixing the two components, the contact can only begin after the emulsion is turned, and the crosslinking speed slows down, making the whole film more uniform.
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.
The development of research and development of water-based thickener, which is used to regulate water fractional system rheology, develops rapidly. Water based thickening agent can be divided into non-associative and associative thickener according to its thickening mechanism. The former thickener not hydrophobic modification monomer, and be no association between thickening polymer molecules, mainly through the polymer after alkali soluble thickener and thickening, sometimes after alkali soluble by mild/linked the water to form a certain network structure to implement the thickening.
In contrast, the associated thickening agent is typically a polymer that USES hydrophobic groups of functional monomers to hydrophobic polymer with non-associative thickening agents. Such thickening agent or between hydrophobic groups on the molecular chain with the thickening of polymer or inorganic particles can produce association between the use, so as to realize the system regulation of rheology.
In the 1980s, the Emmons prepared a water-based coating thickener, using n-long alkyl functional monomers and acrylamide copolymerization methods. Also have literature reported by inverse emulsion polymerization using long chain methyl acrylate modified monomer preparation of hydrophobic modification of association thickener, and examines the monomers on the properties of thickener. In recent years, there has been a growing number of research reports on the development of new products, including the development of new products and applications in different fields.
Crosslinking agent is often used in thickening agent synthesis. In addition to the thickening effect of the thickening agent, the addition of crosslinking agent is more important to enhance its ability to resist shear. But there is a literature indicating that the addition of crosslinking agents often results in reduced thickening effects.
To use 22 alkyl polyoxyethylene ether methacrylate (BEM) as the hydrophobic functional monomer, change the content of crosslinking agent was prepared by a series of acrylic type association thickener, through the characterization of the performance of thickener, explore the crosslinking agent on the properties of thickener, to determine the association type thickener in the suitable content of crosslinking agent.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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