News Details
Waterproof coating crosslinking agent
2017-5-27 18:08:52
Waterproof coating crosslinking agent
The effect of the dosage on the performance of elastic emulsion. As compound emulsifier 3% of monomer amount, the initiator for 1% of the total monomer, polymerization temperature is 75 ℃, different dosage of NMA elastic emulsion was prepared.
NMA amount on the emulsion performance impact: with the increase of the dosage of crosslinking monomer NMA, emulsion and viscosity increasing monomer conversion, when 1.5% of the total for the dosage of crosslinking monomer, conversion rate showed a trend of decline. This may be because NMA is more active, and as the amount of NMA is increased in a certain range, it promotes the copolymerization of monomer.
When excessive NMA, as polymerization, molecular weight increasing, longer molecular chain and crimp tangles, system becomes sticky, monomer reaction is difficult to enter the latex particle, part of the NMA could for copolymerization reaction, has been in the water phase and the reaction, a part of the aggregation occurs crosslinking emulsion crosslinking reaction molecules, and makes the emulsion viscosity grows.
This test emulsifier is 3 percent of the total amount of monomer, when NMA dose is equal to or more than 0.5% of the total amount, the emulsion calcium ion stability is better. This may be because NMA has replaced some of the non-ionic emulsifiers in order to improve the stability of the emulsion.
The coagulation and heat transfer of condensed matter are very important to the mass transfer and heat transfer of emulsion polymerization, and the reduction of coagulation rate can improve the conversion rate and reduce the cost of emulsion. On the crosslinking influence factors of acrylates elastic emulsion condensation rate in order to C, D, A, B, namely the crosslinking monomers on emulsion polymerization has the greatest effect in the condensation rate, polymerization temperature, followed by the initiator dosage, and the dosage of emulsifier influence to its minimum. The minimum level of condensation is A2B2C1D1.
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
Improving the conversion rate helps improve the performance of the emulsion and saves the cost. Dosage of initiator and emulsifier on the emulsion is larger, the influence of monomer conversion and the crosslinking monomers and polymerization temperature is affected, according to the level of average size, various factors combination for A2B3C2D1 monomer conversion rate of the highest level.
The latex particle size and its distribution is one of the important parameters of polymer emulsion crosslinking monomer and polymerization temperature on the crosslinking acrylic elastic emulsion had a greater influence on the latex particle size, less effect and dosage of emulsifier and initiator; The order of effect of the emulsion particle size distribution is: D > B > A > C.
The size of the viscosity is directly related to the construction performance of the emulsion, and the suitable viscosity should be prepared according to the specific needs. The table 5 shows that the crosslinking monomers and emulsifiers dosage of the cross-linking acrylates elastic emulsion viscosity is larger, the influence of the initiator and polymerization temperature is affected, according to the market of acrylic ester emulsion viscosity as standard, the selection of the optimal level for A2B2C2D1.
Proper increase of the cross-linking degree of emulsion can improve the tensile strength and performance of the paint. Crosslinking monomer and emulsifier dosage are the main factors influencing the emulsion crosslinking degree, and the dosage of initiator and polymerization temperature influence is small, with moderate crosslinking acrylic ester emulsion as reference, select the optimal level for A2B3C2D1.
The effect of the above factors on the performance of the emulsion was found, and the influence of the emulsion condensation rate, viscosity and crosslinking degree was found. This paper analyzes the performance of self-crosslinked acrylic elastic emulsion, and then finds the optimal combination.
The best dosage of initiator is A2, the best dosage of emulsifier for B3 or B2, the best dosage of cross-linking monomer for C2, best polymerization temperature for D1, therefore A2B3C2D1 for the best condition of preparation of the crosslinking acrylic elastic emulsion, namely when the APS, composite emulsifier and NMA is respectively 0.7%, 3% and 1% of the total monomer, polymerization temperature is 75 ℃, with good performance can be prepared crosslinked elastic emulsion.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The effect of the dosage on the performance of elastic emulsion. As compound emulsifier 3% of monomer amount, the initiator for 1% of the total monomer, polymerization temperature is 75 ℃, different dosage of NMA elastic emulsion was prepared.
NMA amount on the emulsion performance impact: with the increase of the dosage of crosslinking monomer NMA, emulsion and viscosity increasing monomer conversion, when 1.5% of the total for the dosage of crosslinking monomer, conversion rate showed a trend of decline. This may be because NMA is more active, and as the amount of NMA is increased in a certain range, it promotes the copolymerization of monomer.
When excessive NMA, as polymerization, molecular weight increasing, longer molecular chain and crimp tangles, system becomes sticky, monomer reaction is difficult to enter the latex particle, part of the NMA could for copolymerization reaction, has been in the water phase and the reaction, a part of the aggregation occurs crosslinking emulsion crosslinking reaction molecules, and makes the emulsion viscosity grows.
This test emulsifier is 3 percent of the total amount of monomer, when NMA dose is equal to or more than 0.5% of the total amount, the emulsion calcium ion stability is better. This may be because NMA has replaced some of the non-ionic emulsifiers in order to improve the stability of the emulsion.
The coagulation and heat transfer of condensed matter are very important to the mass transfer and heat transfer of emulsion polymerization, and the reduction of coagulation rate can improve the conversion rate and reduce the cost of emulsion. On the crosslinking influence factors of acrylates elastic emulsion condensation rate in order to C, D, A, B, namely the crosslinking monomers on emulsion polymerization has the greatest effect in the condensation rate, polymerization temperature, followed by the initiator dosage, and the dosage of emulsifier influence to its minimum. The minimum level of condensation is A2B2C1D1.
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
Improving the conversion rate helps improve the performance of the emulsion and saves the cost. Dosage of initiator and emulsifier on the emulsion is larger, the influence of monomer conversion and the crosslinking monomers and polymerization temperature is affected, according to the level of average size, various factors combination for A2B3C2D1 monomer conversion rate of the highest level.
The latex particle size and its distribution is one of the important parameters of polymer emulsion crosslinking monomer and polymerization temperature on the crosslinking acrylic elastic emulsion had a greater influence on the latex particle size, less effect and dosage of emulsifier and initiator; The order of effect of the emulsion particle size distribution is: D > B > A > C.
The size of the viscosity is directly related to the construction performance of the emulsion, and the suitable viscosity should be prepared according to the specific needs. The table 5 shows that the crosslinking monomers and emulsifiers dosage of the cross-linking acrylates elastic emulsion viscosity is larger, the influence of the initiator and polymerization temperature is affected, according to the market of acrylic ester emulsion viscosity as standard, the selection of the optimal level for A2B2C2D1.
Proper increase of the cross-linking degree of emulsion can improve the tensile strength and performance of the paint. Crosslinking monomer and emulsifier dosage are the main factors influencing the emulsion crosslinking degree, and the dosage of initiator and polymerization temperature influence is small, with moderate crosslinking acrylic ester emulsion as reference, select the optimal level for A2B3C2D1.
The effect of the above factors on the performance of the emulsion was found, and the influence of the emulsion condensation rate, viscosity and crosslinking degree was found. This paper analyzes the performance of self-crosslinked acrylic elastic emulsion, and then finds the optimal combination.
The best dosage of initiator is A2, the best dosage of emulsifier for B3 or B2, the best dosage of cross-linking monomer for C2, best polymerization temperature for D1, therefore A2B3C2D1 for the best condition of preparation of the crosslinking acrylic elastic emulsion, namely when the APS, composite emulsifier and NMA is respectively 0.7%, 3% and 1% of the total monomer, polymerization temperature is 75 ℃, with good performance can be prepared crosslinked elastic emulsion.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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