News Details
Carbamide/polyurethane coating crosslinking agent
2017-5-9 11:16:02
Carbamide/polyurethane coating crosslinking agent[Glycoluril & PU]
Ganourea Powderlink 1174 is mainly used for the preparation of outdoor wrinkles [wrinkle finish] powder coating, which can be used in conjunction with hydroxy polyester.
Powderlind1174 by Florida exposure and artificial accelerated aging test show that the weatherability and TGIC fairly, the disadvantage is that crosslinking reaction need special catalyst, crosslinking with methanol, difficult, so the application is restricted, but in the presence of suitable catalysts to the preparation of wrinkles type (Wrinkle) powder.
Another one that can be used for hydroxypolyester is isocyanate, which is made up of a powder system called polyurethane powder coating. Because the isocyanate has strong activity, can't use it directly used as crosslinking agent, must first addition reaction with end capping agent again sealing and stable material formed under a certain temperature.
When the agent is heated to a certain temperature, the agent dissociates from the highly active isocyanate group, which is then formed by the hydroxyl polyester.
The famous products include B1065 and B1530, Crelan U12, etc. Huels (now Degussa) will also be IPDI 3 get together again made of epsilon - has lactam sealing seal isocyanate crosslinking agent, not only improve the potential - NCO content and after the melamine urea ring structure but also increases the heat resistance, weather resistance coating type also is able to improve.
Obviously the above several kinds of crosslinking agent has closed end when crosslinking agent release, which not only brings to the environment pollution will produce pinhole phenomenon, so often in the powder formula to join a certain amount of benzoin to eliminate pinhole. In response to these shortcomings Huels has introduced the inner closed crosslinking agent, such as BF1540, BF1300, etc.
It is possible to make a thicker film by not using a closed end agent. The idea is to make the IPDI diazobutanone intermediates first, and then redouble it.
After the dimerization of n butyl ketone in 160 ℃ will decompose reduction alone, free - NCO isocyanate groups, and then got behind in membrane.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
The hydroxypolyesters with isocyanates are very tolerant to TGIC, and they are full of surface. But the disadvantage is that the use of large, expensive products limits its use in many cases. In recent years, the application of PU system in European furniture industry has been accelerating.
The carbamide is a chemical, which is C4H6N4O2 and has a molecular weight of 142.116.
Polyurethane coating is a common type of coating, which can be divided into two component polyurethane coating and single component polyurethane coating. Two-component polyurethane coating is general by isocyanate prepolymer (also called low molecular polymer) carbamate and consists of two parts: the hydroxyl resin, usually referred to as the crosslinking agent components and main components.
A wide variety of this kind of coating, the application range is very wide, depending on the compounds containing hydroxyl groups can be divided into acrylic polyurethane, alkyd, polyurethane, polyester polyurethane, polyether polyurethane, epoxy polyurethane and other varieties. Generally have good mechanical properties, high solid content, various aspects performance is better. It is a kind of coating variety that has a promising future.
The main applications are wood coatings, auto repair coatings, anti-corrosion coatings, floor coatings, electronic coatings, special coatings and polyurethane waterproof coatings. The drawback is that the construction process is complex, the construction environment is very high, the paint film can produce the malady easily. Single component polyurethane coating mainly has ammonia ester oil paint, moisture crosslinking polyurethane coating, sealing type polyurethane coating and so on. The application face is not as broad as the two-component coating, mainly used for floor coating, anticorrosion coating, precoil coating, etc., its overall performance is not as comprehensive as the two-component coating.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Ganourea Powderlink 1174 is mainly used for the preparation of outdoor wrinkles [wrinkle finish] powder coating, which can be used in conjunction with hydroxy polyester.
Powderlind1174 by Florida exposure and artificial accelerated aging test show that the weatherability and TGIC fairly, the disadvantage is that crosslinking reaction need special catalyst, crosslinking with methanol, difficult, so the application is restricted, but in the presence of suitable catalysts to the preparation of wrinkles type (Wrinkle) powder.
Another one that can be used for hydroxypolyester is isocyanate, which is made up of a powder system called polyurethane powder coating. Because the isocyanate has strong activity, can't use it directly used as crosslinking agent, must first addition reaction with end capping agent again sealing and stable material formed under a certain temperature.
When the agent is heated to a certain temperature, the agent dissociates from the highly active isocyanate group, which is then formed by the hydroxyl polyester.
The famous products include B1065 and B1530, Crelan U12, etc. Huels (now Degussa) will also be IPDI 3 get together again made of epsilon - has lactam sealing seal isocyanate crosslinking agent, not only improve the potential - NCO content and after the melamine urea ring structure but also increases the heat resistance, weather resistance coating type also is able to improve.
Obviously the above several kinds of crosslinking agent has closed end when crosslinking agent release, which not only brings to the environment pollution will produce pinhole phenomenon, so often in the powder formula to join a certain amount of benzoin to eliminate pinhole. In response to these shortcomings Huels has introduced the inner closed crosslinking agent, such as BF1540, BF1300, etc.
It is possible to make a thicker film by not using a closed end agent. The idea is to make the IPDI diazobutanone intermediates first, and then redouble it.
After the dimerization of n butyl ketone in 160 ℃ will decompose reduction alone, free - NCO isocyanate groups, and then got behind in membrane.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
The hydroxypolyesters with isocyanates are very tolerant to TGIC, and they are full of surface. But the disadvantage is that the use of large, expensive products limits its use in many cases. In recent years, the application of PU system in European furniture industry has been accelerating.
The carbamide is a chemical, which is C4H6N4O2 and has a molecular weight of 142.116.
Polyurethane coating is a common type of coating, which can be divided into two component polyurethane coating and single component polyurethane coating. Two-component polyurethane coating is general by isocyanate prepolymer (also called low molecular polymer) carbamate and consists of two parts: the hydroxyl resin, usually referred to as the crosslinking agent components and main components.
A wide variety of this kind of coating, the application range is very wide, depending on the compounds containing hydroxyl groups can be divided into acrylic polyurethane, alkyd, polyurethane, polyester polyurethane, polyether polyurethane, epoxy polyurethane and other varieties. Generally have good mechanical properties, high solid content, various aspects performance is better. It is a kind of coating variety that has a promising future.
The main applications are wood coatings, auto repair coatings, anti-corrosion coatings, floor coatings, electronic coatings, special coatings and polyurethane waterproof coatings. The drawback is that the construction process is complex, the construction environment is very high, the paint film can produce the malady easily. Single component polyurethane coating mainly has ammonia ester oil paint, moisture crosslinking polyurethane coating, sealing type polyurethane coating and so on. The application face is not as broad as the two-component coating, mainly used for floor coating, anticorrosion coating, precoil coating, etc., its overall performance is not as comprehensive as the two-component coating.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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