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An amine coating crosslinking agent variety
2017-8-11 23:49:12
An amine coating crosslinking agent variety
In this paper, we introduce several kinds of common amine crosslinking agents.
Polyamide: polyamide as the crosslinking agent of epoxy resin is produced by the reaction of dimer, trimer oleic acid or unsaturated fatty acid and polyamide amide. Due to the structure containing long carbon chain fatty acid and amino, can make the crosslinking products with high elasticity and stick relay and resistance to water, it also has good workability, ingredient proportion is wide, small toxicity, basically no volatiles, can in the humid metal, concrete surface construction.
But its drawback is low heat resistance, thermal deformation temperature is only about 50 ℃; Below 15 ℃ cross-linking incomplete, physical properties, mechanical properties of crosslinked will fall, so you must add promoter to adjust its crosslinking speed, but can cause excessive crosslinking material brittleness increase; Poor solvent resistance and hydrocarbon solvent.
Adipogenic amine: fatty amine crosslinking agent is second only to polyamide in various crosslinking agents. This is because most of them are liquid and have a good solubility with epoxy. Can be crosslinked epoxy resin at normal temperature, the process is convenient; The heat released in response to the heat release further encourages the reaction of the epoxy resins and crosslinking agents.
Due to the exothermic heat transfer, the amount of epoxy resin used for each ingredient cannot be too much. According to the specific characteristics of crosslinking agent, proper mating quantity is mastered. The crosslinking product is not high heat resistance, and the crosslinking can be heated properly in order to improve its heat resistance. Or at room temperature gel (or partially cross-linked), heat crosslinking at appropriate temperature.
Aliphatic amine crosslinking agent used in heating (such as large parts) or not allowed to heat (heat sensitive components) adhesive, sealant, small casting, laminated material, ambient crosslinking coatings, etc.
Chinese name: Diethyl toluene diamine(DETDA)Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
In the molecular structure of aromatic amine crosslinking agent, it has stable benzene ring structure, and the amino group is directly connected with the benzene ring.
The alkalinity of aromatic diamine is weaker than that of aliphatic amine, plus the three-dimensional barrier of aromatic ring, and the reaction of epoxy resin is smaller than that of fatty amine. In the reaction process with epoxy resin, due to the significant difference in the reaction of secondary amine and beramine, the formation of the b-phase of the straight-chain polymer solid is very slow and must be heated crosslinking. The temperature of crosslinking is suitable for the high grade stage. The heat resistance, drug resistance, electrical performance and mechanical properties of crosslinking are better.
An amine group containing lipid ring (cyclohexyl, heteroxic, nitrogen hexapyclic) in the molecular structure. Most of them are low viscosity liquid, which is longer than fatty amine, and the color degree of crosslinking is better than that of fatty amine and polyamide; Medium temperature crosslinking, high price, good transparency, good weather resistance, high mechanical strength of crosslinking materials; The modified product can be crosslinked at room temperature for ornament and easy to ripple.
5] polyether amine: polyether amine generally contain one end connected to the main chain of the polyether, amino main chain generally have ethylene oxide (EO) and propylene oxide (PO) or EO/PO mixed structure, so named "polyether amine. The products of polyether amine crosslinking can enhance the elasticity, toughness, impact and flexibility of crosslinking. The low viscosity, low color and long operation time of polyether amine are suitable for the production and production of epoxy accessories.
Imidazoles: imidazoles crosslinking agent is a compound that contains imidazole structure in the molecular structure. Mimidazolis crosslinking agent can be cross-linked with epoxy resin and can be used as a promoter for crosslinking agents such as dicyandiamide, anhydride and phenolic resin.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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