News Details
The emulsion coating crosslinking agent test
2017-5-23 16:05:19
The emulsion coating crosslinking agent test
Gel rate determination: collect carefully screen wall, bottle and the condensate on the blender, 120 ℃ drying to constant quality, condensed quality percentage is the gel rate of mixed monomers.
Latex solid content determination: about 2 g polymer emulsion to be included in the weighing disk, according to the quality, then put in oven with ventilation, drying under 120 ℃ after 20 min said quality, calculation of solid content.
Viscosity: the NDJ - 1 type rotating viscometer, choose 2 rotor, determination of viscosity under (25 + 1) ℃.
Determination of the minimum film-forming temperature (MFT), membrane: adopt QMB meter, minimum film-forming temperature of latex evenly on the gradient plate, the dry emulsion slowly will present a clear dividing line in the gradient plate, the high temperature side of the transparent film formation, while at the side of the low temperature cracking or pulverization, thus dividing the corresponding temperature is the minimum film-forming temperature of latex.
Coating of high temperature viscosity determination back: follow the standards of GB/T1762-1980 (1989), the characterization of paint film by hot pressing sex hot sticky back. Emulsion coating on stainless steel plate, 60 ℃ oven into membrane curing 2 h, again at room temperature for 24 h. Then stick in the paint film on the surface of filter paper smooth, in 120 ℃ oven, filter paper and add load of 1.96 N/cm2, 30 min after remove load, take out the stainless steel plate to observe filter paper fiber residue on the surface of the paint film. In accordance with the
According to how much filter paper fiber residues indicators can be divided into four grades: grade Ⅰ, stainless steel plate film inverted face to, immediately drop filter paper, fiber residue; Ⅱ level, filter paper did not fall, when the film for the filter paper drop when shaking, residual trace fibers; Ⅲ level, paint film for next jitter filter does not drop, can remove the filter paper, tears, a small amount of fiber residue; Ⅳ class, remove the filter paper, filter paper torn or have more fiber residue.
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
The effects of polymerization methods: emulsion polymerization can be used a variety of production process, using the concept of "particle design", soft hard core/shell structure is prepared polymer emulsion and latex particles can significantly reduce the MFT of emulsion [4]. This research adopts the pre emulsified monomers of semi-continuous emulsion polymerization process, seed emulsion polymerization method, on the same formula for conventional emulsion polymerization and core-shell emulsion polymerization, and to design the composition of core and shell, a series of polymer emulsion was synthesized.
Using semi-continuous emulsion polymerization process, in the process of the emulsified monomers in both seed emulsion polymerization of core-shell emulsion polymerization, the emulsion is given priority to with white pan blue appearance, stability of the polymerization were better, the gel rate is less, the gel is mainly on the bottle of film and the walls of the stirring blades of a tiny gel particles, which is associated with the reactor size and mixing state.
The viscosity of the emulsion, the MFT and the resistance of the paint film were affected by the polymerization method. PAE1 for conventional seed emulsion polymerization technology, its membrane performance was mainly affected by copolymer of Tg, MFT than Tg, heat pressure performance of Ⅱ level; PAE2, PAE7, PAE8 for hardcore soft shell polymerization process design, the MFT are lower than PAE1, film-forming performance and heat-resistant pressure performance layer by formula of shell monomer composition, core/shell monomer ratio.
In PAE2, PAE7, nuclear layer/shell monomer ratio is about 1:2, shell polymer can be completely cover nuclear layer polymer, MFT is mainly determined by the Tg of shell polymer, so shell Tg larger PAE7, the MFT is higher than that of small shell Tg PAE2, hot pressing is PAE7 than PAE2 performance.
PAE8, nuclear layer/shell monomer ratio is about 1:1, shell polymer is not enough to completely cover the nuclear layer of polymer, so although PAE8 nuclear layer of Tg and PAE2 consistent, shell of Tg than PAE2, but PAE8 film-forming performance and heat-resistant PAE2 than pressure performance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Gel rate determination: collect carefully screen wall, bottle and the condensate on the blender, 120 ℃ drying to constant quality, condensed quality percentage is the gel rate of mixed monomers.
Latex solid content determination: about 2 g polymer emulsion to be included in the weighing disk, according to the quality, then put in oven with ventilation, drying under 120 ℃ after 20 min said quality, calculation of solid content.
Viscosity: the NDJ - 1 type rotating viscometer, choose 2 rotor, determination of viscosity under (25 + 1) ℃.
Determination of the minimum film-forming temperature (MFT), membrane: adopt QMB meter, minimum film-forming temperature of latex evenly on the gradient plate, the dry emulsion slowly will present a clear dividing line in the gradient plate, the high temperature side of the transparent film formation, while at the side of the low temperature cracking or pulverization, thus dividing the corresponding temperature is the minimum film-forming temperature of latex.
Coating of high temperature viscosity determination back: follow the standards of GB/T1762-1980 (1989), the characterization of paint film by hot pressing sex hot sticky back. Emulsion coating on stainless steel plate, 60 ℃ oven into membrane curing 2 h, again at room temperature for 24 h. Then stick in the paint film on the surface of filter paper smooth, in 120 ℃ oven, filter paper and add load of 1.96 N/cm2, 30 min after remove load, take out the stainless steel plate to observe filter paper fiber residue on the surface of the paint film. In accordance with the
According to how much filter paper fiber residues indicators can be divided into four grades: grade Ⅰ, stainless steel plate film inverted face to, immediately drop filter paper, fiber residue; Ⅱ level, filter paper did not fall, when the film for the filter paper drop when shaking, residual trace fibers; Ⅲ level, paint film for next jitter filter does not drop, can remove the filter paper, tears, a small amount of fiber residue; Ⅳ class, remove the filter paper, filter paper torn or have more fiber residue.
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
The effects of polymerization methods: emulsion polymerization can be used a variety of production process, using the concept of "particle design", soft hard core/shell structure is prepared polymer emulsion and latex particles can significantly reduce the MFT of emulsion [4]. This research adopts the pre emulsified monomers of semi-continuous emulsion polymerization process, seed emulsion polymerization method, on the same formula for conventional emulsion polymerization and core-shell emulsion polymerization, and to design the composition of core and shell, a series of polymer emulsion was synthesized.
Using semi-continuous emulsion polymerization process, in the process of the emulsified monomers in both seed emulsion polymerization of core-shell emulsion polymerization, the emulsion is given priority to with white pan blue appearance, stability of the polymerization were better, the gel rate is less, the gel is mainly on the bottle of film and the walls of the stirring blades of a tiny gel particles, which is associated with the reactor size and mixing state.
The viscosity of the emulsion, the MFT and the resistance of the paint film were affected by the polymerization method. PAE1 for conventional seed emulsion polymerization technology, its membrane performance was mainly affected by copolymer of Tg, MFT than Tg, heat pressure performance of Ⅱ level; PAE2, PAE7, PAE8 for hardcore soft shell polymerization process design, the MFT are lower than PAE1, film-forming performance and heat-resistant pressure performance layer by formula of shell monomer composition, core/shell monomer ratio.
In PAE2, PAE7, nuclear layer/shell monomer ratio is about 1:2, shell polymer can be completely cover nuclear layer polymer, MFT is mainly determined by the Tg of shell polymer, so shell Tg larger PAE7, the MFT is higher than that of small shell Tg PAE2, hot pressing is PAE7 than PAE2 performance.
PAE8, nuclear layer/shell monomer ratio is about 1:1, shell polymer is not enough to completely cover the nuclear layer of polymer, so although PAE8 nuclear layer of Tg and PAE2 consistent, shell of Tg than PAE2, but PAE8 film-forming performance and heat-resistant PAE2 than pressure performance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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