Overview of acid curing agents

organic anhydride curing agent, also belongs to the additive polymeric curing agentAs early as 1936, Drpierre Castan of Switzerland began using phthalates-cured epoxy resin as a denture materialThe acid anhyrife curing agent is used in heavy power sectors such as large casting and is still the main use of this type of curing agentThis year, with the development of the electrical and electronic industries, acid anhydride curing agent in small and medium-sized electrical appliances have also been widely usedIn particular, weak electricity, but also received full attention, such as integrated circuit envelopes, capacitors, such as the envelopeIn coatings, such as powder coatings, these curing agents are also valuedanane curing agent is compared with other curing agents, with the following advantages:1Small volatility, low toxicity, less irritation to the skin2The amount of ethylene oxide resin, low viscosity after mixing with epoxy resin, can be added to improve the filling, is conducive to reducing costs
3Long period of application, easy to operatefrom the performance of curing, mainly in:1Due to the slow curing reaction, the shrinkage rate is low 2 There is a higher temperature of thermal deformation, excellent heat resistance, curing search shallow 3 Mechanical and electrical properties are excellent
however, the curing temperature of the antanic curing agent is relatively high, the curing cycle is relatively long, not easy to modify, easy to absorb moisture in storage to generate free acid (curing speed is slow, curing performance decreased);