The curing temperature of all kinds of curing agent is different, and the heat resistance of curing object is very different.Generally speaking, the use of curing agent with high curing temperature can obtain excellent heat resistant curing materials.For addition polymerization curing agent, curing temperature and heat resistance are increased in the following order:

    Aliphatic polyamines < alicyclic polyamines < aromatic polyamines < phenolic < anhydride

The heat resistance of catalytic polymeric curing agent is generally at the level of aromatic polyamine.The heat resistance of anionic polymerization type (tertiary amines and imidazolated ancients) and cationic polymerization type (BF3 complex) is basically the same, which is mainly because although the initial reaction mechanism is different, they eventually form ether bond bonded network structure.

    The curing reaction is a chemical reaction, which is greatly affected by the curing temperature. As the temperature increases, the reaction speed increases, and the gel time becomes shorter.The log value of gel time decreased linearly with the increase of curing temperature.But the curing temperature is too high, often make the curing properties decline, so there is an upper limit of curing temperature;The intermediate temperature between curing speed and curing properties must be selected as the appropriate curing temperature.Curing agent can be divided into four categories according to curing temperature: low temperature curing agent curing temperature below room temperature;Curing temperature of room temperature curing agent is room temperature ~ 50℃;Medium temperature curing agent is 50 ~ 100℃;The curing temperature of high temperature curing agent is above 100℃.There are few kinds of curing agent belonging to low temperature curing type, such as polylucerol type, polyisocyanate type, etc.Domestic research and production of T-31 modified amine, YH-82 modified amine can be cured below 0℃.There are many kinds of room temperature cured polyamines: aliphatic polyamines, alicyclic polyamines;Low molecular polyamides and modified aromatic amines.There are some alicyclic polyamines, tertiary amines, nidazole and boron trifluoride complex belonging to the intermediate temperature consolidation type.Those who belong to high temperature model curing agent have aromatic group much amine, acid anhydride, first rank phenolic aldehyde resin, amino resin, dicyanamide and acyl hydrazine to wait.

    For high temperature curing system, curing temperature is generally divided into two stages, in the gel before using low temperature curing, in the gel state or slightly higher than the gel state, and then high temperature heating after curing (post-CURE), relative to the previous section of curing for pre-cure (pre-CURE).