News Details
Paint crosslinking thickener
2017-6-2 16:11:05
Paint crosslinking thickener
The basic performance of a thickener emulsion with different mass fraction of the DAP, the emulsion viscosity is measured in 60r/min and 3 # rotor. The monomer conversion rate of thickening agent emulsion was above 98%, and the emulsion of latex with DAP was 163.4 nm (N1).
The diameter of the emulsion dropped to 91.6 nm (N2) when it was added to the 0.1 percent DAP. We know that the particle size given by light scattering is the hydrating particle size of the emulsion.
This system main monomer for EA and MAA, the polymer chain segment with strong hydrophilic, did not join the crosslinking agent of emulsion particle on the surface of the polymer end will stretch to the water phase, by light scattering method testing the hydration of particle size is bigger than dry latex particles. Once joined the crosslinking agent, the latex particle surface hydrophilic chain segment to the extension of water phase will be limited, thus understandable after joining monomer quality 0.1% DAP latex particle size obviously decline phenomenon.
Since then, the diameter of the thickening agent of the emulsion has increased significantly and the regularity increases with the w (DAP), which increases to 195.nm (N4) from 91.6 nm (N2) to w (DAP) = 1.0%. In a distributed system of a given polymer content, the increase in the volume of dispersed particles and the reduction in the number of particles in a given polymer will generally result in a reduction in the apparent viscosity of the system.
No crosslinking agent (N1) and crosslinking agent (N3) of 0.5 percent (N3) of the thickening agent for the thickening agent of the emulsion. The graph shows that each sample size is narrower, and w (DAP) has no discernible effect on the particle size distribution.
Laboratory materials and instruments. Raw material: diallyl phthalate (DAP, chemical purity); Methacrylate (EA) and methacrylate (MAA, chemically pure); Dialkyl polyoxyethylene methacrylate (BEM, industrial), BEM with a mass score of 0.50, and MAA with a mass score of 0.24; Ammonium sulphate (an analysis of pure, tianjin light and technology company); Two types of surfactants: nonylphenol polyoxyethylene oxide, which has a length of 9 (OP 9) and 21 (op-21). Sodium lauryl benzene sulfonate (SDBS); Second distilled water.
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
Instrument: 808 automatic potentiometric titrator; 662 spectrophotometer; DV - Ⅱ + Pro type rotary viscometer; SVM3000 motion viscosimeter; The zen-3600 nano-zs laser granulometer.
Preparation of thickening agent emulsion. Chemical raw materials for thickening agent: 100g water, 40g monomer (including MAA in BEM), BEM of 1.0 g and DAP of different dosage. Emulsifiers are SDBS, ops-21 and op-9, each of which is 1.0%, 0.5% and 0.5% of the total quality of the monomer. The APS is the initiator, which accounts for 0.2% of the total mass.
First of all, with a moderate amount of water will all OP - 9, the amount of SDBS formula 50%, and 10% of the OP - 21 dissolves into the pre emulsifier, stirring for 10 min under 800 r/min, and slowly add all monomers and crosslinking agent, the mixture of DAP, and continue to stir after 20 min pre emulsion system.
APS configuration into aqueous solution of quality score of 0.01, take the 1/10 join the reaction kettle, in the process of the emulsion to join the preparation of aqueous emulsion and initiator, use the rest of the water and preparation pre emulsion after the rest of the emulsifying agent, stirring under 200 r/min and began to heat up, for the temperature to 85 ℃, add all the initiator 10% of the total mass polymerization.
Reactor of milky mixture in minutes turned blue, polymerization after 10 min the remaining pre emulsion and the initiator solution (both at 90% of the total amount) within 2.5 h constant speed drops to the reactor. Reaction temperature at 85 ℃.
Representation of thickening agent. The pH and transmittance of the emulsion are measured by automatic potentiometric titrator and photometer. The viscosity of the emulsion is measured by motion viscosimeter or rotating viscosimeter. The size and distribution of the emulsion were measured by the laser granulometer, and the test samples were about 0.1%.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The basic performance of a thickener emulsion with different mass fraction of the DAP, the emulsion viscosity is measured in 60r/min and 3 # rotor. The monomer conversion rate of thickening agent emulsion was above 98%, and the emulsion of latex with DAP was 163.4 nm (N1).
The diameter of the emulsion dropped to 91.6 nm (N2) when it was added to the 0.1 percent DAP. We know that the particle size given by light scattering is the hydrating particle size of the emulsion.
This system main monomer for EA and MAA, the polymer chain segment with strong hydrophilic, did not join the crosslinking agent of emulsion particle on the surface of the polymer end will stretch to the water phase, by light scattering method testing the hydration of particle size is bigger than dry latex particles. Once joined the crosslinking agent, the latex particle surface hydrophilic chain segment to the extension of water phase will be limited, thus understandable after joining monomer quality 0.1% DAP latex particle size obviously decline phenomenon.
Since then, the diameter of the thickening agent of the emulsion has increased significantly and the regularity increases with the w (DAP), which increases to 195.nm (N4) from 91.6 nm (N2) to w (DAP) = 1.0%. In a distributed system of a given polymer content, the increase in the volume of dispersed particles and the reduction in the number of particles in a given polymer will generally result in a reduction in the apparent viscosity of the system.
No crosslinking agent (N1) and crosslinking agent (N3) of 0.5 percent (N3) of the thickening agent for the thickening agent of the emulsion. The graph shows that each sample size is narrower, and w (DAP) has no discernible effect on the particle size distribution.
Laboratory materials and instruments. Raw material: diallyl phthalate (DAP, chemical purity); Methacrylate (EA) and methacrylate (MAA, chemically pure); Dialkyl polyoxyethylene methacrylate (BEM, industrial), BEM with a mass score of 0.50, and MAA with a mass score of 0.24; Ammonium sulphate (an analysis of pure, tianjin light and technology company); Two types of surfactants: nonylphenol polyoxyethylene oxide, which has a length of 9 (OP 9) and 21 (op-21). Sodium lauryl benzene sulfonate (SDBS); Second distilled water.
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
Instrument: 808 automatic potentiometric titrator; 662 spectrophotometer; DV - Ⅱ + Pro type rotary viscometer; SVM3000 motion viscosimeter; The zen-3600 nano-zs laser granulometer.
Preparation of thickening agent emulsion. Chemical raw materials for thickening agent: 100g water, 40g monomer (including MAA in BEM), BEM of 1.0 g and DAP of different dosage. Emulsifiers are SDBS, ops-21 and op-9, each of which is 1.0%, 0.5% and 0.5% of the total quality of the monomer. The APS is the initiator, which accounts for 0.2% of the total mass.
First of all, with a moderate amount of water will all OP - 9, the amount of SDBS formula 50%, and 10% of the OP - 21 dissolves into the pre emulsifier, stirring for 10 min under 800 r/min, and slowly add all monomers and crosslinking agent, the mixture of DAP, and continue to stir after 20 min pre emulsion system.
APS configuration into aqueous solution of quality score of 0.01, take the 1/10 join the reaction kettle, in the process of the emulsion to join the preparation of aqueous emulsion and initiator, use the rest of the water and preparation pre emulsion after the rest of the emulsifying agent, stirring under 200 r/min and began to heat up, for the temperature to 85 ℃, add all the initiator 10% of the total mass polymerization.
Reactor of milky mixture in minutes turned blue, polymerization after 10 min the remaining pre emulsion and the initiator solution (both at 90% of the total amount) within 2.5 h constant speed drops to the reactor. Reaction temperature at 85 ℃.
Representation of thickening agent. The pH and transmittance of the emulsion are measured by automatic potentiometric titrator and photometer. The viscosity of the emulsion is measured by motion viscosimeter or rotating viscosimeter. The size and distribution of the emulsion were measured by the laser granulometer, and the test samples were about 0.1%.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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