News Details
New Epoxy Resin Amine Coating Crosslinking Agent
2017-7-9 15:29:04
New Epoxy Resin Amine Coating Crosslinking Agent
In this paper, the research results of new epoxy resin amine cross-linking agents in recent years are reviewed. The new epoxy resin amine cross-linking agent is applied to the crosslinking of epoxy resin. The performance of the modified epoxy resin system Conducted a comprehensive analysis.
Epoxy resin with excellent performance, widely used. Epoxy resin cross-linking agent is the most important epoxy resin amine cross-linking agent, accounting for about 71% of the total cross-linking agent, which modified the largest amount of amine, the most widely used. Commonly used amine crosslinking agents are fatty amines, aromatic amines, alicyclic amines, polyamides and tertiary amines.
Aliphatic amine cross-linking agent is a widely used cross-linking agent, commonly used can not be heated or not allowed to heat the adhesive, sealant, small casting, laminates and room temperature cross-linked coatings. However, the heat resistance of these cross-linked materials is generally not good, so many scholars on the development of new heat-resistant and functionalized aliphatic amine cross-linking agent were studied.
ToldyA and other synthesis of a phosphorus-containing aliphatic amine cross-linking agent TEDAP, (structural formula see 1), not only can replace the traditional epoxy resin crosslinking agent, or an effective flame retardant. The flammability index (GWFI) was increased from 550 ° C to 960 ° C, the limit oxygen index (LOI) value increased from 21 to 33, and reached the UL-94V-0 level, which was added to the AH-16-T-58 resin.
Li Mei and other high-grade fatty alcohol polyoxyethylene ether and methyl tetrahydrophthalic anhydride by esterification reaction methyl methyl hydrogen phthalate monomeric, and then with E-51 reaction to produce monoc Tetrahydrophthalic acid diester, and finally terminated with polyamine extended chain and benzyl glycidyl ether to obtain fatty alcohol polyether waterborne amine type epoxy crosslinking agent (PEAWAECA).
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
Through the analysis of paint film performance, When the ratio of epoxy to amine hydrogen is 1: 1, the coating flexibility is 1mm, the pencil hardness is up to 3H, the adhesion reaches 1, and the impact resistance is 50kg / cm. The crosslinking agent effectively improves the Epoxy resin coating more brittle defects.
Through the analysis of paint film performance, When the ratio of epoxy to amine hydrogen is 1: 1, the coating flexibility is 1mm, the pencil hardness is up to 3H, the adhesion reaches 1, and the impact resistance is 50kg / cm. The crosslinking agent effectively improves the Epoxy resin coating more brittle defects.
(MXBDP), which is a star structure with benzene ring as the core. (Structure Formula 3). They studied the non - isothermal kinetics of bisphenol A glycidyl ether (DGEBA) / MXBDP system, and the heating rate could accelerate the reaction rate, but had little effect on the non - isothermal reaction curve (114 ~ 119kJ / mol).
The experimental results show that the activation energy (Ea) of the system decreases from 57kJ / mol to 45kJ / mol when the conversion rate α = 10% ~ 35%, and the MXBDP modified epoxy resin is expected to be an excellent room temperature coating, Adhesives and sealants.
WanJintao and so on using butyl-glycidyl ether modified polypropylene imine dendrimers, the polymer PB2 and PB4, found that they can be a good cross-linked with DGEBA hair should be. The activation energy of DGEBA / EDA-dendri- (NH2) system was 59.7kJ / mol, which was higher than that of DGE-BA / PB2 system and DGEBA / PB4 system, which was 56.4kJ / mol and 55 respectively. 0kJ / mol; and with the increase of butyl glycidyl ether monomer, the glass transition temperature and β-transition temperature, crosslink density and initial degradation temperature decrease gradually. However, the epoxy resin after crosslinking is still very good (<220 ℃), and compared to EDA-dendri- (NH2), PB2 and PB4 (especially PB4) can increase and expand the cross-linked epoxy resin near room temperature when the attenuation.
(N), N ', N' - 5 (3 - aminopropyl) - diethylene triamine (PADT) were synthesized by the addition of PADT (PADT) Crosslinking studies for DGEBA show that PADT has a high reactivity and improves the crosslinking density of the crosslinking system, resulting in higher stability and thermomechanical properties of the crosslinked species, which is of great value Aliphatic amine cross-linking agent.
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian