News Details
Water water-based coating permanent temperature crosslinking agent
2017-5-30 23:51:34
Water water-based coating permanent temperature crosslinking agent
The mechanism of constant temperature crosslinking and film curing. The mechanism of the synthesis of the water-based polyurethane was mainly produced by the catalyst of linseed oil and diethanolamine, which first produced the intermediates.
Then with intermediates and dihydroxy methyl propionic acid (DMPA) as the degree of difunctional hydroxyl (OH) - component of TDI/HDI for diisocyanate (NCO) components, the two components under certain conditions, by gradual addition copolymerization, producing polyurethane resin, resulting in the main chain of the polyurethane polymer side introduces two types of highly reactive functional groups of double bond and carboxyl (-cooh) group, the former makes the resin under drier is interesting generated after crosslinking membrane, which provides conditions for water soluble resin.
Finally, in order to further increase the water solubility of the resin, improve the stability of resin liquid and coating, it is necessary to use neutralizing agent to make carboxylic acid salt.
By room temperature crosslinking aqueous polyurethane synthesis, mechanism and the distribution of the water-based coating system, the dry coating curing methods including pu side base double bond in the drier under the action of room temperature oxidation crosslinking, pu side base carboxylic acid and solvent water in system of decomposition of ammonium salt and latent solvent evaporation of low carbon alcohol ether and penetration, the double bond of oxidizing crosslinking curing of aqueous polyurethane coating film plays a decisive role, the other two drying behavior to coating curing produce synergies.
IR representations of synthetic products. 3009. 8 cm - 1 attributable to double bond absorption peak of C - H 2 928. 7 cm - 1 for a single bond C - H peak, 1, 751. 5 cm - 1 for ester bond carbonyl peak, 1 650. 6 cm - 1 for carbon carbon double bond peak. 3, 374, 9 cm - 1 for hydroxyl peak, 3, 015. 8 cm - 1 for double bond absorption peak of C - H 2 928. 7 cm - 1 for methyl (CH3) C - H peak, 2 855. 6 cm - 1 for methylene (CH3) C - H peak, 1, 737. 7 cm - 1 for amide carbonyl peak, 1 618. 0 cm - 1 for carbon carbon double bond peak, 1 465. 6 cm - 1 C - N key peak.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
Hazard Class: 6.1
Due to the strong electron-withdrawing groups electronic effect induced effect or for the electronic conjugation effect, makes the double bond of C - H, carbon carbon double bond and carbonyl to long wave and short wave infrared characteristic absorption peak. That suggests linseed oil after amine solution in the molecular structure of the intermediates containing hydroxyl, double bond, amide groups, that product is expected reaction of acyl of linseed oil diethanolamine.
Process conditions for the synthesis of linseed oil amide. Diethylamine (DEA) and linseed oil. Linseed oil with diethanolamine diethanolamine reaction by linseed oil acyl amine solution, glycerin acetate 2 acid ester and glycerol, the composition of the ultimate product amine solution under the condition of other factors determine depends on the ratio of reactants, different ratio of reactants, the hydroxyl value of the final product is different, there are differences in the stability of the system.
Linseed oil nDEA: n = 1:1 experiment reaction product is stable, and the hydroxyl value product closest to the theory of hydroxyl value, so the best nDEA: n linseed oil = 1:1.
Amine solution of linseed oil temperature in other reaction conditions at the same time, the temperature influence on the performance of the reaction to the finish time and product. According to the experimental data in the table 2, the product of three temperatures generated hydroxyl value are close to the theory of hydroxyl value 173. 6 mg KOH/g, but the product overnight stratification during 105 ~ 110 ℃, incomplete reaction, reaction temperature at 120 ~ 130 ℃ and 130 ~ 130 ℃ when compared to the reaction product of stability is the same, but the latter reaction time is shorter, so is the best reaction temperature 130 ~ 140 ℃.
Catalyst dosage. Linseed oil amine solution should be carried out under the action of catalyst, reaction, but the time at the end of the dosage of the catalyst to reaction. According to the experimental data in the table 3, increase of catalyst dosage can accelerate the reaction rate, but the CH3 ON a dosage increased to 0. 4%, the time had no obvious increase, catalyst dosage increase will increase the cost of production, so the 0. 4% was the optimum dosage of catalyst.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The mechanism of constant temperature crosslinking and film curing. The mechanism of the synthesis of the water-based polyurethane was mainly produced by the catalyst of linseed oil and diethanolamine, which first produced the intermediates.
Then with intermediates and dihydroxy methyl propionic acid (DMPA) as the degree of difunctional hydroxyl (OH) - component of TDI/HDI for diisocyanate (NCO) components, the two components under certain conditions, by gradual addition copolymerization, producing polyurethane resin, resulting in the main chain of the polyurethane polymer side introduces two types of highly reactive functional groups of double bond and carboxyl (-cooh) group, the former makes the resin under drier is interesting generated after crosslinking membrane, which provides conditions for water soluble resin.
Finally, in order to further increase the water solubility of the resin, improve the stability of resin liquid and coating, it is necessary to use neutralizing agent to make carboxylic acid salt.
By room temperature crosslinking aqueous polyurethane synthesis, mechanism and the distribution of the water-based coating system, the dry coating curing methods including pu side base double bond in the drier under the action of room temperature oxidation crosslinking, pu side base carboxylic acid and solvent water in system of decomposition of ammonium salt and latent solvent evaporation of low carbon alcohol ether and penetration, the double bond of oxidizing crosslinking curing of aqueous polyurethane coating film plays a decisive role, the other two drying behavior to coating curing produce synergies.
IR representations of synthetic products. 3009. 8 cm - 1 attributable to double bond absorption peak of C - H 2 928. 7 cm - 1 for a single bond C - H peak, 1, 751. 5 cm - 1 for ester bond carbonyl peak, 1 650. 6 cm - 1 for carbon carbon double bond peak. 3, 374, 9 cm - 1 for hydroxyl peak, 3, 015. 8 cm - 1 for double bond absorption peak of C - H 2 928. 7 cm - 1 for methyl (CH3) C - H peak, 2 855. 6 cm - 1 for methylene (CH3) C - H peak, 1, 737. 7 cm - 1 for amide carbonyl peak, 1 618. 0 cm - 1 for carbon carbon double bond peak, 1 465. 6 cm - 1 C - N key peak.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
Hazard Class: 6.1
Due to the strong electron-withdrawing groups electronic effect induced effect or for the electronic conjugation effect, makes the double bond of C - H, carbon carbon double bond and carbonyl to long wave and short wave infrared characteristic absorption peak. That suggests linseed oil after amine solution in the molecular structure of the intermediates containing hydroxyl, double bond, amide groups, that product is expected reaction of acyl of linseed oil diethanolamine.
Process conditions for the synthesis of linseed oil amide. Diethylamine (DEA) and linseed oil. Linseed oil with diethanolamine diethanolamine reaction by linseed oil acyl amine solution, glycerin acetate 2 acid ester and glycerol, the composition of the ultimate product amine solution under the condition of other factors determine depends on the ratio of reactants, different ratio of reactants, the hydroxyl value of the final product is different, there are differences in the stability of the system.
Linseed oil nDEA: n = 1:1 experiment reaction product is stable, and the hydroxyl value product closest to the theory of hydroxyl value, so the best nDEA: n linseed oil = 1:1.
Amine solution of linseed oil temperature in other reaction conditions at the same time, the temperature influence on the performance of the reaction to the finish time and product. According to the experimental data in the table 2, the product of three temperatures generated hydroxyl value are close to the theory of hydroxyl value 173. 6 mg KOH/g, but the product overnight stratification during 105 ~ 110 ℃, incomplete reaction, reaction temperature at 120 ~ 130 ℃ and 130 ~ 130 ℃ when compared to the reaction product of stability is the same, but the latter reaction time is shorter, so is the best reaction temperature 130 ~ 140 ℃.
Catalyst dosage. Linseed oil amine solution should be carried out under the action of catalyst, reaction, but the time at the end of the dosage of the catalyst to reaction. According to the experimental data in the table 3, increase of catalyst dosage can accelerate the reaction rate, but the CH3 ON a dosage increased to 0. 4%, the time had no obvious increase, catalyst dosage increase will increase the cost of production, so the 0. 4% was the optimum dosage of catalyst.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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