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Epoxy resin rapid forming paint crosslinking agent
2017-7-30 23:36:04
Epoxy resin rapid forming paint crosslinking agent
Rapid prototyping is a key manufacturing technique used in automotive parts, and the rapid prototyping of epoxy resin is the basis for the rapid prototyping of thermosetting resin matrix composites.
Based on the development of medium temperature fast crosslinked epoxy resin system as the goal, imidazole derivatives is studied as the main body system of epoxy crosslinking properties of crosslinking agent, the effects of the variety of crosslinking agent and crosslinking process on the properties of crosslinked speed and the crosslinking effects. The results show that, by optimizing the proportion, dosage and crosslinking process, the crosslinking can be completed at about 6min, while ensuring that the pouring body is medium and good mechanical performance.
Lightweight technology is one of the key technologies for the development of automobile industry, lightweight materials and advanced technology is the basis and premise of auto lightweight [. Reinforced with carbon fiber as the resin matrix composite is an excellent representative of lightweight, high strength material, high modulus, high specific intensity, fatigue resistance, corrosion resistance, the overall shape and design is strong, and many other good qualities, comprehensive performance than aluminum alloy and high strength steel, is ideal for automotive lightweight materials.
However, the low molding efficiency and high cost of advanced composite materials have challenged its quantitative application in the automotive industry. It is necessary to solve the problem of molding efficiency and cost in order to realize the large-scale application of advanced composite materials in automobile industry. , it has been reported in the foreign company USES fast crosslinked resin system and fast injection process, the implementation of thermosetting resin matrix composites molding cycle significantly shortened, the crosslinking time reduced to within 5 min, and the preparation of the composite material one-piece frame, the molding cycle for 10 minutes, figure 1 is the time distribution of the molding process.
The fast crosslinked resin system is 2 - methyl imidazole as crosslinking agent, epoxy resin based resin, and add a small molecule alcohols as chain transfer agent, in order to lower the viscosity of the early stage of reaction, suitable for longer periods. The technology makes it possible for composite materials to be used in efficient manufacturing of car parts.
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
Imidazolide derivatives are a kind of tertiary amine, widely used as the crosslinking agent of epoxy resin and the reaction mechanism of anion etherification polymerization.
Many scholars studied the imidazoles compounds and the crosslinking behavior of epoxy resin, found the varieties and amount of the imidazole derivatives and crosslinking temperature have significant influence on the crosslinking speed, and in many imidazole derivatives, 2 - methyl imidazole crosslinking with faster speed. This article from the crosslinking time and improve the quality of crosslinking, give priority to with 2 - methyl imidazole crosslinking agent, and adding amine crosslinking agent, the crosslinking characteristics of epoxy resin system was studied, and the possibility of quick crosslinking, for the development of automotive composite technology to lay the material foundation.
Experimental materials and equipment experimental materials: 2-methylmidazole; Epoxy resin e-51; Amine crosslinking agent, self - control; Crosslinking promoter, self - control. T700 unidirectional fabric.
Experimental equipment: mechanical testing machine, bh315-t01 temperature field acquisition system; DSC1 differential scanning calorimeter.
The analysis of crosslinking reaction is usually accompanied by significant exothermic effect, and the differential scanning calorimetry is an effective method to study the crosslinking process. In order to ensure the accuracy of the analysis results, the sampling quantity is controlled at about 10mg, nitrogen atmosphere protection and temperature correction of the instrument.
Casting body temperature measurement and sample preparation was prepared by crosslinking process bending performance test with resin, casting body first 10 min vacuum under 30 ℃, let stand for 10 min, and then poured resin into the mold of has grown to about 60 ℃, in has grown to 120 ℃ of press on the template.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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