Heat-resistant resin, a flame retardant chemical modification Introduction

Modified epoxy resins to improve the heat resistance of the heat-resistant properties, it is necessary to reduce the molecular structure of the resin matrix of the polar groups of the resin matrix and water interactions, thereby reducing the water absorption of the resin matrix; while optimizing composite The molding process to reduce the composite material produced in the molding process microporous, micro-cracks, free volume, also can improve the heat-resistant properties. Increasing the degree of crosslinking, such as the introduction of heat into imino group, an isocyanate group, ah oxazolidone, as well as the formation of interpenetrating polymer network is to improve the heat resistance of the most important means. Aniline containing ether amine-terminated curing agent for the modified epoxy resin, the composite material obtained in an air atmosphere, the initial decomposition temperature is high, heat resistance performance. Metallic stearate
Flame retardant epoxy resin modified poor, to improve its flame retardancy, generally in epoxy resin introduction of halogen, nitrogen, phosphorus, boron and silicon flame elements. The method may be used to introduce flame retardant curing agent, such as halogen, phosphorus, boron and silicon to cure the epoxy resin curing agent, it can be structurally modified epoxy resin, flame-retardant epoxy resin introduced into the molecular element. Brominated epoxy novolac type epoxy resin can be used as packaging material as a flame retardant. Since a large electronegativity fluorine atom, a bond with the carbon atoms is high, a large repulsion between fluorine atoms, the polymer is hard to rotate within the key, so the fluorine-containing epoxy resin has excellent corrosion resistance, electrical insulation resistance, water repellency , stain resistance, for good wettability was sticky. 9,10 - dihydro-9 - oxa-1O-phosphaphenanthrene-1O-oxide (DOPO) as a new flame retardant modified monomer into practical applications has been, DOPO with bisphenol A type epoxy resin obtained by reacting phosphorus-containing epoxy resin, owing to its excellent flame retardant properties, environmentally friendly features and favorites. PVC flame retardant
Chemically modified by changing the structure of the epoxy resin, an epoxy resin molecule to introduce a number of chemical groups, to improve the performance of the epoxy resin, to broaden their scope of application. Such as the use of acrylic acid or methacrylic acid with an epoxy group in the epoxy resin part of the reaction of epoxy groups in the molecule at the same time retain some carbon-carbon double bond introduced to make the modified epoxy resin has both the photosensitivity, and retention ring Some excellent features epoxy resin. Introduce in the molecule or a hydrophilic group, as the epoxy resin-modified epoxy resin, the epoxy resin modified with a water-dispersible.