News Details
Paint room temperature crosslinking agent
2017-5-26 18:32:55
Paint room temperature crosslinking agent
For the purpose of room temperature self-crosslinking, the catalyst is usually added to reduce the crosslinking temperature, increase the crosslinking rate and shorten the time of crosslinking. Commonly used catalysts have acid catalyst, such as dilute hydrochloric acid, thin sulfuric acid, acetic acid, oxalic acid, tartaric acid and methyl benzene sulfonic acid, and contains many functional groups of primary amine, secondary amine and tertiary amine alkali catalyst, such as triethanolamine, triethyl amine, diethyl tetramine and hexamethylenediamine.
Liu et al., using acrylic monomer and n-methacrylamide derivatives, n-isobutyl methacrylamide copolymers. The cross-linking reaction of the emulsion was slow when the catalyst was not added to the catalyst, and the rate of crosslinking reaction was significantly increased when the catalyst was added.
In order to further improve the corrosion resistance of coating, it is necessary to increase the system crosslinking degree. The larger the use of n-hydroxymethyl acrylamide, the greater the crosslinking. The dosage of n-hydroxymethyl acrylamide is typically 1.5 to 7 percent of the total amount of monomer, and the emulsion can form a good crosslinking.
If more than 12 percent, the viscosity of the emulsion increases significantly and the gelatinization occurs prematurely. Although the amount of N - methylol acrylamide accounts for only a small part of the copolymer composition, but to improve the emulsion coating corrosion resistance, solvent resistance and abrasion resistance are of great help.
Leskovac in poly (methyl methacrylate and styrene emulsion such as the introduction of 4% of N - 2% hydroxymethyl acrylamide and acrylic acid as functional monomer, through the analysis of test show that the introduction of 4% of N - methylol acrylamide can make system occurs crosslinking, and the performance of the resin are improved significantly.
Chen by semi-continuous seed emulsion polymerization, such as synthesis of N - methylol acrylamide as crosslinking monomer containing fluorine acrylic emulsion crosslinking, the research results show that when the content of N - methylol acrylamide was 3.75%, the crosslinking density of the emulsion coating peak, reach maximum at the same time, the contact Angle of coating.
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
When the content of n-hydroxymethacrylamide exceeds 3.75%, the coated contact Angle decreases due to the hydrophilic properties of n-hydroxymethyl acrylamide. Chen lijun et al., and other preparation of the high elastic room temperature self-crosslinking acrylate polymer emulsion with n-hydroxymethacrylamide.
When N - methylol acrylamide was 2%, the dosage of the polymer emulsion crosslinking degree is moderate, the emulsion coating with appropriate flexibility, flexibility and extensibility, elastic coating can be used for the preparation of excellent properties. When n-hydroxymethacrylamide is excessive, the polymerization stability decreases due to the increase of the gel rate of the emulsion due to the water solubility and crosslinking of the crosslinked monomer.
The room temperature of the double bond in unsaturated fatty acid is self-oxidized. Unsaturated fatty acids on the carbon carbon double bond and active methylene crosslinking reaction can be carried out from oxidation, this kind of autoxidation crosslinking can be used for the preparation of one-component room temperature since the crosslinked coating.
Unsaturated fatty acids are classified into non-conjugate and conjugate types, and these two types of unsaturated fatty acids have different molecular structures. Linoleic acid is a typical non conjugated unsaturated fatty acid, its molecules containing three carbon carbon double bond, the conjugate linoleic acid oxidation of molecules of the crosslinked mainly through lively methylene react with oxygen and, active methylene refers to the two double bonds of methylene.
The linoleic acid molecule contains two active submethyl groups, so the crosslinking reaction allows the intermolecular crosslinking to form a structure. Crosslinking mechanism is active methylene first absorb oxygen produced oxygen groups, these groups peroxide decomposition again into the active free radicals, reactive free radicals to trigger system of double bond of crosslinking reaction.
The self-crosslinking reaction of linoleic acid may be spontaneous, but it is very slow, and when used as coating, it needs to be about 7d. In order to speed up the crosslinking speed, it is necessary to add the drier, which is the catalyst that promotes the automatic oxidation, which is usually about 0.2 percent of linoleic acid.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
For the purpose of room temperature self-crosslinking, the catalyst is usually added to reduce the crosslinking temperature, increase the crosslinking rate and shorten the time of crosslinking. Commonly used catalysts have acid catalyst, such as dilute hydrochloric acid, thin sulfuric acid, acetic acid, oxalic acid, tartaric acid and methyl benzene sulfonic acid, and contains many functional groups of primary amine, secondary amine and tertiary amine alkali catalyst, such as triethanolamine, triethyl amine, diethyl tetramine and hexamethylenediamine.
Liu et al., using acrylic monomer and n-methacrylamide derivatives, n-isobutyl methacrylamide copolymers. The cross-linking reaction of the emulsion was slow when the catalyst was not added to the catalyst, and the rate of crosslinking reaction was significantly increased when the catalyst was added.
In order to further improve the corrosion resistance of coating, it is necessary to increase the system crosslinking degree. The larger the use of n-hydroxymethyl acrylamide, the greater the crosslinking. The dosage of n-hydroxymethyl acrylamide is typically 1.5 to 7 percent of the total amount of monomer, and the emulsion can form a good crosslinking.
If more than 12 percent, the viscosity of the emulsion increases significantly and the gelatinization occurs prematurely. Although the amount of N - methylol acrylamide accounts for only a small part of the copolymer composition, but to improve the emulsion coating corrosion resistance, solvent resistance and abrasion resistance are of great help.
Leskovac in poly (methyl methacrylate and styrene emulsion such as the introduction of 4% of N - 2% hydroxymethyl acrylamide and acrylic acid as functional monomer, through the analysis of test show that the introduction of 4% of N - methylol acrylamide can make system occurs crosslinking, and the performance of the resin are improved significantly.
Chen by semi-continuous seed emulsion polymerization, such as synthesis of N - methylol acrylamide as crosslinking monomer containing fluorine acrylic emulsion crosslinking, the research results show that when the content of N - methylol acrylamide was 3.75%, the crosslinking density of the emulsion coating peak, reach maximum at the same time, the contact Angle of coating.
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
When the content of n-hydroxymethacrylamide exceeds 3.75%, the coated contact Angle decreases due to the hydrophilic properties of n-hydroxymethyl acrylamide. Chen lijun et al., and other preparation of the high elastic room temperature self-crosslinking acrylate polymer emulsion with n-hydroxymethacrylamide.
When N - methylol acrylamide was 2%, the dosage of the polymer emulsion crosslinking degree is moderate, the emulsion coating with appropriate flexibility, flexibility and extensibility, elastic coating can be used for the preparation of excellent properties. When n-hydroxymethacrylamide is excessive, the polymerization stability decreases due to the increase of the gel rate of the emulsion due to the water solubility and crosslinking of the crosslinked monomer.
The room temperature of the double bond in unsaturated fatty acid is self-oxidized. Unsaturated fatty acids on the carbon carbon double bond and active methylene crosslinking reaction can be carried out from oxidation, this kind of autoxidation crosslinking can be used for the preparation of one-component room temperature since the crosslinked coating.
Unsaturated fatty acids are classified into non-conjugate and conjugate types, and these two types of unsaturated fatty acids have different molecular structures. Linoleic acid is a typical non conjugated unsaturated fatty acid, its molecules containing three carbon carbon double bond, the conjugate linoleic acid oxidation of molecules of the crosslinked mainly through lively methylene react with oxygen and, active methylene refers to the two double bonds of methylene.
The linoleic acid molecule contains two active submethyl groups, so the crosslinking reaction allows the intermolecular crosslinking to form a structure. Crosslinking mechanism is active methylene first absorb oxygen produced oxygen groups, these groups peroxide decomposition again into the active free radicals, reactive free radicals to trigger system of double bond of crosslinking reaction.
The self-crosslinking reaction of linoleic acid may be spontaneous, but it is very slow, and when used as coating, it needs to be about 7d. In order to speed up the crosslinking speed, it is necessary to add the drier, which is the catalyst that promotes the automatic oxidation, which is usually about 0.2 percent of linoleic acid.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian