Performance and shortcomings of epoxy resin coatings

Epoxy resin was invented in the 1930ssynthesismethod, the application of epoxy resin was promoted in the 1940s. Subsequently, the Swiss Ciba Company and the American Shell Company successively put into formal production. Since then, development has been rapid. Epoxy resin impartscoatingWith its excellent performance and wide range of application methods, its application in deep materials is developing day by day. Its lengthLengthThe speed is second only to butyl alkyd resin paint and amino resin paint, which are widely used in automobile, shipbuilding, chemical industry, and electricity子, aerospace, materials and other industrial sectors.

Epoxy resin is a polymer containing epoxy groups things. Mainly made of epoxychlorinepropaneand span>BisphenolASynthesized, its molecular weight 一Banzai350-0The structure is as follows：

Epoxy resinItself is thermoplastic. To make useful coatings from epoxy resin, you must combine the epoxy resin with a curing agent. OrPlantreact with oil and fatty acids. Cross-linked large pointssub,In order to display various excellent performances.

That isThe hydroxyl group on the benzene ring in the epoxy resin molecule can formether bond,Paint film color retention, durability Chemicals and solvents have good performance;In addition,There are also aliphatic molecules in the molecular structure The hydroxyl group does not interact with alkali, so it has good alkali resistance.

⑵The paint film has excellent adhesion

Especially has stronger adhesion to metal surfaces. This is because the epoxy resin molecules contain aliphatic hydroxyl groups,etherbase and very active epoxy group, made ofYuhydroxyThe polarity of the base and the acid group makes the epoxy resin molecules adjacentGravity is generated between surfaces. AndringOxygenOxygen and metals containing active oxygen TablefaceForm chemical bonds, so it is greatly improvedits adhesion,Paint film chemical resistanceCorrosionSex is also good.

(3)ringOxygenResin coatinghas good thermal stability andElectricalInsulation performance. EpoxytreeFast paint also existsat span>Excuse the shortcomings.

⑴householdOutside Weather resistancePoor,Paint film YiChalk, loss of gloss,The fullness of the paint film is not good. Therefore, it is not suitable as a high-qualityquantityExterior paint and highly decorative paint.

（2) Epoxy resin structure has Hydroxyl, if not treated properly during paint production, the water resistance of the paint film will be poor.

（3) Epoxy resin coatingYesis a two-component one of, manufacturedandUse bothNoConvenient.

spacing: 0;font-size: 16px”>andUse bothNoConvenient.