A self introduction from vinyl ester resin

1、 Introduction

Vinyl ester resin is a type of modified epoxy resin obtained by reacting bisphenol or phenolic epoxy resin with methacrylic acid. It is commonly referred to as vinyl ester resin (VE), also known as epoxy acrylic resin, and is a thermosetting resin. Vinyl ester resin adheres to the excellent characteristics of epoxy resin, with better curing and formability. It can dissolve in styrene and acrylic monomers. Due to its advantages of both epoxy and unsaturated, its application fields are constantly expanding.

Production method

The product is obtained by reacting epoxy resin (such as bisphenol A or tetrabromobisphenol A epoxy resin, epoxy phenolic varnish, and epoxidized polyacrylic acid) with unsaturated monocarboxylic acid (such as acrylic acid, methacrylic acid, etc.), and diluting the product with styrene. By modifying the side hydroxyl groups of the reaction product between epoxy resin and acid, more varieties of vinyl ester resins can be obtained.

2、 Development history

Vinyl ester resin is produced by a ring opening addition chemical reaction between epoxy resin and methacrylic acid. It retains the basic chain segments of epoxy resin and has the excellent processing properties of unsaturated polyester resin. After curing under suitable conditions, it exhibits certain special excellent properties. Since the 1960s, it has experienced rapid development. Firstly, Shell Chemical launched the Epocrgl brand in the United States, followed by Dow Chemical's Derakane brand in 1966, followed closely by Ashland Chemical's Hetron brand and Japan's Showa Polymer Co., Ltd.'s Ripoxy brand. Other foreign brands or manufacturers include AOC, Interplastics, etc. Domestic companies have also developed their own vinyl ester resins, such as Huachang MFE and Shangwei SWANCOR. With the development of vinyl resins, there are more and more enterprises producing vinyl ester resins, resulting in a variety of brands and types in both domestic and international markets.

3、 Product types

Due to the different processes and methods of resin synthesis, there may be slight differences in the structure, properties, and applications of various ethylene based resins.

3.1. Standard Bisphenol A Epoxy Vinyl Ester Resin

Standard bisphenol A epoxy vinyl resin is a vinyl resin synthesized by the reaction of methacrylic acid and bisphenol A epoxy resin, which is easily soluble in styrene solution. This type of resin has the following characteristics:

The double bonds at both ends of the molecular chain are extremely active, allowing the vinyl resin to quickly solidify and quickly gain strength, resulting in highly corrosion-resistant polymers; Synthesized using methacrylic acid, the methyl group on the ester bond edge can provide protection and improve hydrolysis resistance; The resin has a low ester bond content, which is 35-50% less per mole than chemically resistant polyester (bisphenol A-fumaric acid UPR), improving its alkali resistance performance; More secondary hydroxyl groups can improve the wetting and bonding properties of glass fibers, and enhance the mechanical strength of laminated products; Due to cross-linking only at the two ends of the molecule, the molecular chain can elongate under stress to absorb external forces or thermal shocks, exhibiting resistance to microcracking or cracking.

4、 Typical applications

Application of Vinyl Resin

1. Produce corrosion-resistant FRP products, such as fiberglass tanks, pipelines, towers, and corrosion-resistant grilles.

2. Anti corrosion engineering, such as cement-based or iron-based fiberglass lining, high corrosion resistant flooring, high-strength FRP products, such as fiberglass profiles, sports equipment, FRP boats, etc.

3. Heavy duty anti-corrosion glass flake coating and flake adhesive.

4. Other products include UV ink, heavy-duty anti-corrosion industrial flooring, etc.

5. Power plant desulfurization and anti-corrosion, high temperature resistance, strong acid and alkali resistance.

6. Chemical workshop workbenches are resistant to acid, alkali, and corrosion.