News Details
Crosslinking agent for water-based bicomponent polyurethane coating
2017-5-19 15:44:07
Crosslinking agent for water-based bicomponent polyurethane coating
Although more polyether modified isocyanate application has been accepted by the broad market, but they are used as a crosslinking agent of waterborne two-component polyurethane coatings, need higher content of polyether, to ensure enough dispersivity, this leads to a long drying time, and endowed with strong hydrophilic coating of paint.
More than it is for these reasons, polyether glycol modified for isocyanate used for applications where high patience can slightly insufficient, such as applications in automotive primer or antigraffiti coatings). This can be overcome by the development of special ionic modified polyisocyanates.
Aliphatic isocyanate and 3 - (hexanaphthene amino) - 1 - propane sulfonic acid (CAPS), under mild conditions and reaction in the presence of tertiary amine neutralizer, can get sulfonate modified polyisocyanate crosslinking agent. CAPS modified polyisocyanates have good storage stability and can be dispersed in water, even if they contain less sulfonates.
There are already a lot of marketable products available for various environmentally friendly high quality water-based polyurethane coating formulas. Although it's a two-component waterborne polyurethane coatings than water-based one-component coating has the obvious advantage in resistance to chemicals, such as in a dry, high temperature resistant adhesion applications, compared with the solvent of two-component polyurethane, still have larger gap.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
Polyisocyanate crosslinking agent can be used for solvent and water system, and can be used for two-component and one-component system, and can also be used for the dry and low temperature and high temperature baking system. A wide range of construction performance and good comprehensive performance is helpful to the marketing of this kind of curing agent, relative to other technical system, the pu market growth faster, and better prospect of market.
Organic titanate and organic zirconate: organic titanate and organic zirconate are another kind of crosslinking agent for the ink system. Many ordinary ink resin is often used in organic zirconium titanate salt and organic acid salt as accelerator of ink viscosity, such as cellulose nitrate resin and polyurethane resin and so on all use organic zirconium titanate salt and organic acid salt to improve the printing ink adhesion. The chemical properties of organic titanate and organic zirconate are very reactive, so the formulation of inks should be carefully formulated to ensure the stability of the ink system. Organic zirconium titanate salt and organic acid salt, have been used for many years in the solvent-based inks, ink now some water-based acrylics, formula can also see the figure of organic titanate.
Photoinitiator: UV ink and UV photoinitiator are special crosslinking agents. UV ink and UV glazing oil curing principle is: first, light initiator, crosslinking agent absorbs ultraviolet light, UV light device to generate reactive groups free radical, radical polymerization, the UV monomers crosslinking to form a polymer film layer. When the ink is dry, the membrane layer gives the printed material good gloss and resistance. In the present UV ink and UV glazing oil there are two main types of light initiator: free radical initiator and cationic light initiator, they in some of the UV light curing ink system has been used for years. The light initiator determines the drying rate of UV ink or gloss oil, so the choice of the photoinitiator is a key ring in UV ink or the gloss oil formulation.
Several of these mentioned crosslinking agents have their respective advantages and disadvantages. No crosslinking agent is perfect. Crosslinking agents also need to be used in conjunction with other additives to make ink suitable for printing. Because many crosslinking agents are toxic and smelly, they are clearly not in the packaging of food and medicine. Therefore, it is necessary to select ink crosslinking agent carefully and scientifically to meet the requirement of printing customers.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Although more polyether modified isocyanate application has been accepted by the broad market, but they are used as a crosslinking agent of waterborne two-component polyurethane coatings, need higher content of polyether, to ensure enough dispersivity, this leads to a long drying time, and endowed with strong hydrophilic coating of paint.
More than it is for these reasons, polyether glycol modified for isocyanate used for applications where high patience can slightly insufficient, such as applications in automotive primer or antigraffiti coatings). This can be overcome by the development of special ionic modified polyisocyanates.
Aliphatic isocyanate and 3 - (hexanaphthene amino) - 1 - propane sulfonic acid (CAPS), under mild conditions and reaction in the presence of tertiary amine neutralizer, can get sulfonate modified polyisocyanate crosslinking agent. CAPS modified polyisocyanates have good storage stability and can be dispersed in water, even if they contain less sulfonates.
There are already a lot of marketable products available for various environmentally friendly high quality water-based polyurethane coating formulas. Although it's a two-component waterborne polyurethane coatings than water-based one-component coating has the obvious advantage in resistance to chemicals, such as in a dry, high temperature resistant adhesion applications, compared with the solvent of two-component polyurethane, still have larger gap.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
Polyisocyanate crosslinking agent can be used for solvent and water system, and can be used for two-component and one-component system, and can also be used for the dry and low temperature and high temperature baking system. A wide range of construction performance and good comprehensive performance is helpful to the marketing of this kind of curing agent, relative to other technical system, the pu market growth faster, and better prospect of market.
Organic titanate and organic zirconate: organic titanate and organic zirconate are another kind of crosslinking agent for the ink system. Many ordinary ink resin is often used in organic zirconium titanate salt and organic acid salt as accelerator of ink viscosity, such as cellulose nitrate resin and polyurethane resin and so on all use organic zirconium titanate salt and organic acid salt to improve the printing ink adhesion. The chemical properties of organic titanate and organic zirconate are very reactive, so the formulation of inks should be carefully formulated to ensure the stability of the ink system. Organic zirconium titanate salt and organic acid salt, have been used for many years in the solvent-based inks, ink now some water-based acrylics, formula can also see the figure of organic titanate.
Photoinitiator: UV ink and UV photoinitiator are special crosslinking agents. UV ink and UV glazing oil curing principle is: first, light initiator, crosslinking agent absorbs ultraviolet light, UV light device to generate reactive groups free radical, radical polymerization, the UV monomers crosslinking to form a polymer film layer. When the ink is dry, the membrane layer gives the printed material good gloss and resistance. In the present UV ink and UV glazing oil there are two main types of light initiator: free radical initiator and cationic light initiator, they in some of the UV light curing ink system has been used for years. The light initiator determines the drying rate of UV ink or gloss oil, so the choice of the photoinitiator is a key ring in UV ink or the gloss oil formulation.
Several of these mentioned crosslinking agents have their respective advantages and disadvantages. No crosslinking agent is perfect. Crosslinking agents also need to be used in conjunction with other additives to make ink suitable for printing. Because many crosslinking agents are toxic and smelly, they are clearly not in the packaging of food and medicine. Therefore, it is necessary to select ink crosslinking agent carefully and scientifically to meet the requirement of printing customers.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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