News Details
Curing agent
2017-2-17 11:47:25
Curing agent and curing agent, curing agent or agents, is a kind of to improve or control the curing reaction of substance or mixture. Resin curing is through condensation, closed-loop, addition or catalytic chemical reaction, such as irreversible change process in the thermosetting resin, curing is by adding curing (cross-linking) agent.
Curing agent is essential additives, whether as adhesive, coating, castable to add curing agent, epoxy resin can't cure. Variety of curing agents on the mechanical properties of cured, heat resistance, water resistance, corrosion resistance and so on all has very big effect.
Curing agent according to the chemical composition of category 1. Aliphatic amine Such as vinyl triamine DETA aminoethyl piperazine AE 2. Aromatic amine For example m-phenylene diamine m - PDA MPD diamino diphenyl methane DEH DDM HT - 972-3. 50 amide amine 4. Latent curing amine 5. Urea alternatives.
Curing agent curing temperature and heat resistance of various curing agents different curing temperature, curing heat resistance is different also. Generally speaking, the use of high curing temperature of curing agent can get heat curing. For addition polymerization type curing agent, curing temperature and heat resistance increase in the following order: aliphatic polyamine < alicyclic amine more phenolic < < < more aromatic amine acid anhydride
Catalytic addition polymerization type heat resistance of curing agent is generally in the fragrant polyamine levels. Type anionic polymerization (tertiary amine and imidazole antiquities), cationic polymerization (BF3 complex) heat resistance is basically the same, this is mainly from the reaction mechanism is different, but in the end all the reticular structure of ether bond.
Curing reaction belongs to the chemical reaction, is highly affected by the curing temperature and higher temperature, reaction speed, gel time shorter; The gel time of numerical straight decline roughly along with curing temperature rise. But curing temperature is exorbitant, often make the curing performance degradation, so has the upper limit of curing temperature; Must choose the middle temperature curing speed and cured performance, as a suitable curing temperature. Curing agent at the curing temperature can be divided into four categories: low temperature curing agent curing temperature under room temperature. Room temperature curing agent curing temperature to room temperature ~ 50 ℃; Medium temperature curing agent is 50 ~ 100 ℃; High temperature curing agent curing temperature above 100 ℃. Belongs to low temperature type of curing agent varieties, rarely have poly ryukyu, more isocyanate, etc.; Domestic production of T - 31 of modified amine, YH - 82 modified amine curing below 0 ℃. Belong to many different kinds of room temperature type: aliphatic amine and alicyclic amine; Low molecular polyamide and modified aromatic amine etc. Belongs to the medium temperature type of a part of alicyclic amine and tertiary amine, narrow azole and boron trifluoride complex, etc. Belong to type of high temperature curing agent with aromatic amine and acid anhydride, JiaJie phenolic resin, amino resin, the dicyandiamide and hydrazide.
For high temperature curing system, curing temperature is generally divided into two stages, using low temperature curing, in front of the gel in gel or a bit higher than the gel state of the state, after the high temperature heating curing (post - cure), relative before the period of curing for procuring (pre - cure).
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
Curing agent curing temperature and curing of heat resistance has a lot to do. Similarly, in the same type of curing agent, although has the same functionality, but due to the different chemical structure, its property and curing properties are also different. Therefore, a comprehensive understanding of many of the same functionality, and chemical structure of different amine hardener traits, characteristics, for choosing curing agent, is very important.
For luster, best aromatic, aliphatic is the worst. The properties under the influence of curing temperature, temperature rise, luster. As for softness, functionality, the distance between the long polyamide better some, while high crosslinking density of aromatic amine. Is the opposite of softness, heat resistance and adhesion is consistent with softness. Drug resistance (acid) affected by the chemical structure, aromatic is fine, fat amine and polyamide are vulnerable to chemical corrosion. Controlled by the mass concentration of functionality, water resistance, functionality, quality of low concentration, high degree of hydrophobic polyamide class more resistant to water, and functionality, high concentration of aromatic.
Curing agent according to use heating can be divided into normal temperature curing agent and curing agent. High temperature curing epoxy resin with good general performance, but in coating and adhesive used in civil construction such as due to heating is difficult, need temperature curing; So mostly use fatty amine, alicyclic reflected and polyamide, etc., especially in winter using coating and adhesive had with isocyanate with more, or use a foul odour of ryukyu and alcohols.
As to middle temperature curing agent and high temperature curing agent, is to the body of the heat resistance and curing of heat resistance, adhesion and drug resistance, etc. As a benchmark to choose. Select key for amine and acid anhydride. Due to the anhydride curing has excellent electric properties, so it is widely used in electronics, electrical appliances.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Curing agent is essential additives, whether as adhesive, coating, castable to add curing agent, epoxy resin can't cure. Variety of curing agents on the mechanical properties of cured, heat resistance, water resistance, corrosion resistance and so on all has very big effect.
Curing agent according to the chemical composition of category 1. Aliphatic amine Such as vinyl triamine DETA aminoethyl piperazine AE 2. Aromatic amine For example m-phenylene diamine m - PDA MPD diamino diphenyl methane DEH DDM HT - 972-3. 50 amide amine 4. Latent curing amine 5. Urea alternatives.
Curing agent curing temperature and heat resistance of various curing agents different curing temperature, curing heat resistance is different also. Generally speaking, the use of high curing temperature of curing agent can get heat curing. For addition polymerization type curing agent, curing temperature and heat resistance increase in the following order: aliphatic polyamine < alicyclic amine more phenolic < < < more aromatic amine acid anhydride
Catalytic addition polymerization type heat resistance of curing agent is generally in the fragrant polyamine levels. Type anionic polymerization (tertiary amine and imidazole antiquities), cationic polymerization (BF3 complex) heat resistance is basically the same, this is mainly from the reaction mechanism is different, but in the end all the reticular structure of ether bond.
Curing reaction belongs to the chemical reaction, is highly affected by the curing temperature and higher temperature, reaction speed, gel time shorter; The gel time of numerical straight decline roughly along with curing temperature rise. But curing temperature is exorbitant, often make the curing performance degradation, so has the upper limit of curing temperature; Must choose the middle temperature curing speed and cured performance, as a suitable curing temperature. Curing agent at the curing temperature can be divided into four categories: low temperature curing agent curing temperature under room temperature. Room temperature curing agent curing temperature to room temperature ~ 50 ℃; Medium temperature curing agent is 50 ~ 100 ℃; High temperature curing agent curing temperature above 100 ℃. Belongs to low temperature type of curing agent varieties, rarely have poly ryukyu, more isocyanate, etc.; Domestic production of T - 31 of modified amine, YH - 82 modified amine curing below 0 ℃. Belong to many different kinds of room temperature type: aliphatic amine and alicyclic amine; Low molecular polyamide and modified aromatic amine etc. Belongs to the medium temperature type of a part of alicyclic amine and tertiary amine, narrow azole and boron trifluoride complex, etc. Belong to type of high temperature curing agent with aromatic amine and acid anhydride, JiaJie phenolic resin, amino resin, the dicyandiamide and hydrazide.
For high temperature curing system, curing temperature is generally divided into two stages, using low temperature curing, in front of the gel in gel or a bit higher than the gel state of the state, after the high temperature heating curing (post - cure), relative before the period of curing for procuring (pre - cure).
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
Curing agent curing temperature and curing of heat resistance has a lot to do. Similarly, in the same type of curing agent, although has the same functionality, but due to the different chemical structure, its property and curing properties are also different. Therefore, a comprehensive understanding of many of the same functionality, and chemical structure of different amine hardener traits, characteristics, for choosing curing agent, is very important.
For luster, best aromatic, aliphatic is the worst. The properties under the influence of curing temperature, temperature rise, luster. As for softness, functionality, the distance between the long polyamide better some, while high crosslinking density of aromatic amine. Is the opposite of softness, heat resistance and adhesion is consistent with softness. Drug resistance (acid) affected by the chemical structure, aromatic is fine, fat amine and polyamide are vulnerable to chemical corrosion. Controlled by the mass concentration of functionality, water resistance, functionality, quality of low concentration, high degree of hydrophobic polyamide class more resistant to water, and functionality, high concentration of aromatic.
Curing agent according to use heating can be divided into normal temperature curing agent and curing agent. High temperature curing epoxy resin with good general performance, but in coating and adhesive used in civil construction such as due to heating is difficult, need temperature curing; So mostly use fatty amine, alicyclic reflected and polyamide, etc., especially in winter using coating and adhesive had with isocyanate with more, or use a foul odour of ryukyu and alcohols.
As to middle temperature curing agent and high temperature curing agent, is to the body of the heat resistance and curing of heat resistance, adhesion and drug resistance, etc. As a benchmark to choose. Select key for amine and acid anhydride. Due to the anhydride curing has excellent electric properties, so it is widely used in electronics, electrical appliances.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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