Amine curing agent

Amine 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.

In terms of hue, alicyclic most shallow, basically is transparent, and aliphatic and aromatic, its color degree is quite significant. Much amine curing agent in terms of viscosity, also have very big different, alicyclic but few Pa zero point zero s, the polyamide is very thick, for Pa, s, aromatic amines are solid. Applicable period length as it happens and curing the opposite sex, aliphatic highest reactivity, and alicyclic, amide, aromatic reduced in turn.

Hue: (optimal) alicyclic - and aliphatic amide - aromatic amine (bad)

Cooked degrees: (low) alicyclic - aliphatic and aromatic - amide (high)

Shelf life: (long) and aromatic amides - alicyclic - aliphatic (short)

Curing: (fast) the aliphatic, alicyclic - amide - aromatic (slow)

Stimulus: (strong) aliphatic and aromatic - alicyclic - amide (weak)

Amine curing agent of chemical structures and properties

In addition, the gloss, flexibility, adhesion, acid resistance, resistance to water, also has a certain regularity.

Gloss: (optimal) and aromatic alicyclic amine, polyamide, fat (bad)

Flexible: (soft) - aliphatic, alicyclic - aromatic polyamide (just)

Adhesion: (optimal) - alicyclic - aliphatic and aromatic polyamide (good)

Acid (optimal) aromatic - alicyclic - and aliphatic polyamide (bad)

Water resistance: (optimal) polyamide - fatty amine - alicyclic amines, aromatic amine (good)

Amine curing agent of the chemical structure and more with bisphenol A resin curing properties




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


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.

Use different variety of curing agents

Curing agent according to use heating can be divided into normal temperature curing agent and curing agent. As mentioned above, 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.

More than aliphatic amine curing adhesion and alkali resistance, water resistance are good. Aromatic polyamines in drug resistance is also good. Because of amino nitrogen and metal forming hydrogen bond, thus has excellent antirust effect. Amine mass concentration, the higher the better the rust. Anhydride curing agent and epoxy ester bond formation, resistance to organic acid and inorganic acid showed high, performance in general, more than the polyamine.

Compositions: commonly used epoxy resin curing agent have fatty amine, alicyclic amines, aromatic amine, polyamide and anhydride, resin type, tertiary amine, in under the action of ultraviolet light initiator or other light also can make the epoxy resin curing. Amine curing agent is generally selected under normal temperature or low temperature curing, heat curing the common acid anhydride, aromatic agent.

Epoxy value is to identify the main measure of quality of epoxy resin, epoxy resin model is divided according to different epoxy value to distinguish the. Epoxy value refers to the 100 grams of resin contained in gram equivalent number of epoxy group.

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Diethyl toluene diamine(DETDA)  http://www.yaruichem.com