Polyamide epoxy resin curing agent

Abstract

The invention relates to the technical field of curing agents, in particular to a polyamide epoxy resin curing agent. The polyamide epoxy resin curing agent is prepared from, by weight, 40-45 parts of dimer acid, 20-30 parts of binary acid, 1-10 parts of momomer acid, 6.5-10 parts of quadrol, 5-10 parts of long-chain polyether amine, 10-15 parts of diethylenetriamine, 10-15 parts of triethylene tetramine, 5-10 parts of tetraethylenepentamine, 1-10 parts of 1,4-cyclohexanediamine and 5-10 parts of aromatic diamine. Compared with the prior art, the polyamide epoxy resin curing agent is prepared through the steps that acid and amine are subjected to a polymerization reaction to prepare amide and regarded as a reaction system, and 1,4-cyclohexanediamine is added into the reaction system, and the polyamide epoxy resin curing agent modified by 1,4-cyclohexanediamine has the excellent low-temperature resistance, and is quite good in obtained flexibility and toughness, moderate in hardness and high in curing speed.

Description

technical field [0001] The invention relates to the technical field of curing agents, in particular to polyamide epoxy resin curing agents. Background technique [0002] Epoxy resin is widely used in civil construction, electronic appliances, aerospace, automotive machinery and other fields, and is an important part of national production. China is currently the world's largest producer of epoxy resin, with an output of 37.1% of the world. However, epoxy resin is an amorphous viscous liquid, which is plastic when heated, has no obvious melting point, becomes soft and gradually melts and becomes sticky when heated, is insoluble in water, and will not harden itself, so it has almost no independent use value. Only when the curing agent reacts to form an infusible polymer with a three-dimensional network structure can it be applied. When a certain amount of curing agent is added, it will gradually solidify to form chemical substances with different properties. Therefore, it is ...

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Problems solved by technology

[0003] Commonly used epoxy resin curing agents are divided into basic curing agents and acidic curing agents, and basic curing agents mainly include aliphatic diamines and polyamines, alicyclic amines, aromatic polyamine compounds and modified polyethers Amines and aromatic compounds as curing agents have better film hardness, but the weather resistance of the film is not good. Aliphatic polyamines have better weather resistance, but they are easy to absorb moisture and cause the film to whiten or produce oily stains; polyether amine and The epoxy main agent is cured to form a film coating that is more flexible and less hard

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