News Details
Single component waterborne polyurethane coatings crosslinking agent
2017-3-25 16:39:36
Single component waterborne polyurethane coatings crosslinking agent, the classification, the modification of waterborne polyurethane anticorrosion coating as well as research progress are reviewed.
Pu is polyurethane (polyurethane), generally defined as the polymer chain structure contains repeated carbamate key on the unit for polyurethane polymer compounds.
Is currently one of the more common type of polyurethane coating, can be divided into two-component polyurethane coatings and one-component polyurethane coatings [8]. Waterborne polyurethane is water instead of organic solvent as a new type of polyurethane dispersion medium system, also known as polyurethane or water-based polyurethane water dispersion of polyurethane, river systems.
Given its unique chemical structure of waterborne polyurethane coating gives the outstanding performance: (1) the coating wear resistance and adhesion force; (2) the coating anticorrosive performance, they can withstand oil, acid and alkali resistant, salt resistant industrial waste gas; (3) the coating hardness and softness adjustable, temperature range is extensive; (4), good resistance to high and low temperature from 300 ℃ to 40 ℃ to can have corresponding varieties.
1942, P Schlack] developed single component waterborne polyurethane coatings, waterborne polyurethane coating of particle size is larger, poor stability. Due to excessive dosage of emulsifier, coating film performance is poorer, resulting in the limited range of application of coatings.
Single component waterborne polyurethane is a kind of water as the dispersant and simple construction method of environmentally friendly coatings. Through crosslinking modification of waterborne polyurethane coating has good storage stability, film mechanical properties, water resistance, solvent resistance and aging resistance, and close to the performance of the conventional solvent-based polyurethane coating.
Son Suk - Hye first will be introduced to the carboxylic polyurethane molecular chain segments, triethylamine and again into a salt, can from the waterborne polyurethane emulsion was synthesized coating, and discusses the degree of neutralization and carboxyl content which have influence on the properties of waterborne polyurethane. With the improvement of neutralization degree and carboxyl content, reduce the size of the latex particles from 47 nm to 27 nm, the stability of the emulsion increases.
Yang Dong such with isophorone diisocyanate (IPDI) or toluene 2, 4 - diisocyanate (TDI), polyether polyols (GE220) and dihydroxy methyl propionic acid (DMPA) as raw material, through the synthesis of one component waterborne polyurethane, the polymers method to adjust its NCO/OH value, and the content of DMPA, study the stability and the change of physical properties after the film.
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).
Results show that when the NCO/OH mole ratio was 1.8:1, DMPA: GE220 = 2:1, the average particle size of 30.60 nm, emulsion particle size distribution index of 0.306, bibulous rate is 14.81%, waterborne polyurethane film after its physical properties to achieve the best.
Jing with diethanolamine (DEA) and acetone acrylamide (DAAM) by Michael addition to synthesize a new type of polyurethane chain extender, with isophorone diisocyanate (IPDI), glycol polytetrahydrofuran (PTMG1000), dihydroxy methyl propionic acid (DMPA), trimethylolpropane (TMP) polymerization, ketone hydrazine crosslinking aqueous polyurethane emulsion was.
When n (- NHNH2) and the ratio of n (- CO -) from 0 to 1, the coating bibulous rate is decreased from 32.42% to 14.28%, the hardness increased to 2 h. Film thermal weightlessness tests show that the introduction of ketone hydrazine crosslinking structure, improve the thermal stability of the coating.
Polyurethane coating is one of the more common type of coating, can be divided into two-component polyurethane coatings and one-component polyurethane coatings. 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 has good mechanical properties, high solid content, all aspects of performance are good.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Pu is polyurethane (polyurethane), generally defined as the polymer chain structure contains repeated carbamate key on the unit for polyurethane polymer compounds.
Is currently one of the more common type of polyurethane coating, can be divided into two-component polyurethane coatings and one-component polyurethane coatings [8]. Waterborne polyurethane is water instead of organic solvent as a new type of polyurethane dispersion medium system, also known as polyurethane or water-based polyurethane water dispersion of polyurethane, river systems.
Given its unique chemical structure of waterborne polyurethane coating gives the outstanding performance: (1) the coating wear resistance and adhesion force; (2) the coating anticorrosive performance, they can withstand oil, acid and alkali resistant, salt resistant industrial waste gas; (3) the coating hardness and softness adjustable, temperature range is extensive; (4), good resistance to high and low temperature from 300 ℃ to 40 ℃ to can have corresponding varieties.
1942, P Schlack] developed single component waterborne polyurethane coatings, waterborne polyurethane coating of particle size is larger, poor stability. Due to excessive dosage of emulsifier, coating film performance is poorer, resulting in the limited range of application of coatings.
Single component waterborne polyurethane is a kind of water as the dispersant and simple construction method of environmentally friendly coatings. Through crosslinking modification of waterborne polyurethane coating has good storage stability, film mechanical properties, water resistance, solvent resistance and aging resistance, and close to the performance of the conventional solvent-based polyurethane coating.
Son Suk - Hye first will be introduced to the carboxylic polyurethane molecular chain segments, triethylamine and again into a salt, can from the waterborne polyurethane emulsion was synthesized coating, and discusses the degree of neutralization and carboxyl content which have influence on the properties of waterborne polyurethane. With the improvement of neutralization degree and carboxyl content, reduce the size of the latex particles from 47 nm to 27 nm, the stability of the emulsion increases.
Yang Dong such with isophorone diisocyanate (IPDI) or toluene 2, 4 - diisocyanate (TDI), polyether polyols (GE220) and dihydroxy methyl propionic acid (DMPA) as raw material, through the synthesis of one component waterborne polyurethane, the polymers method to adjust its NCO/OH value, and the content of DMPA, study the stability and the change of physical properties after the film.
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).
Results show that when the NCO/OH mole ratio was 1.8:1, DMPA: GE220 = 2:1, the average particle size of 30.60 nm, emulsion particle size distribution index of 0.306, bibulous rate is 14.81%, waterborne polyurethane film after its physical properties to achieve the best.
Jing with diethanolamine (DEA) and acetone acrylamide (DAAM) by Michael addition to synthesize a new type of polyurethane chain extender, with isophorone diisocyanate (IPDI), glycol polytetrahydrofuran (PTMG1000), dihydroxy methyl propionic acid (DMPA), trimethylolpropane (TMP) polymerization, ketone hydrazine crosslinking aqueous polyurethane emulsion was.
When n (- NHNH2) and the ratio of n (- CO -) from 0 to 1, the coating bibulous rate is decreased from 32.42% to 14.28%, the hardness increased to 2 h. Film thermal weightlessness tests show that the introduction of ketone hydrazine crosslinking structure, improve the thermal stability of the coating.
Polyurethane coating is one of the more common type of coating, can be divided into two-component polyurethane coatings and one-component polyurethane coatings. 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 has good mechanical properties, high solid content, all aspects of performance are good.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian