1、Comparison of Hydrogenated Bisphenol A and Bisphenol A

Hydrogenated bisphenol A epoxy resin was cured using different kind of curing agents, resulting in epoxy networks with better shape memory properties than bisphenol A epoxy networks. The non-isothermal curing kinetics investigated by differential scanning calorimetry (DSC) demonstrated that hydrogenated bisphenol A epoxy showed lower curing reactivity than bisphenol A epoxy, while it still ...

2、Hydrogenation of Bisphenol A

This study demonstrates the hydrogenation of a bisphenol A-type epoxy resin (BE186) through solvent selection, development of a catalyst for aromatic ring hydrogenation, and control of epoxy loss. A functional greener solvent, water in ethyl acetate, was proposed based on solvatochromic parameters, high α and low β. RhOx present in Vulcan XC72-supported monometallic Rh and bimetallic Rh–Pt ...

3、氢化双酚A型环氧树脂的固化动力学

Abstract: The hydrogenated bisphenol A epoxy resin (HBPA-EP) with an epoxy value of 0.45 was prepared by the reaction of hydrogenated bisphenol A and epichlorohydrin, and was cured with polyamines or anhydrides. The curing properties of the HBPA-EP with different hardeners were investigated by DSC, and the curing conditions, apparent activation energies, as well as the reaction kinetic ...

4、Hydrogenated Bisphenol A Epoxy Resin and Curing Agents

1、Comparison of Hydrogenated Bisphenol A and Bisphenol A Epoxies: Curing Behavior, Thermal and Mechanical Properties, Shape Memory Properties Abstract Hydrogenated bisphenol A epoxy resin was cured using different kind of curing agents, resulting in epoxy networks with better shape memory properties than bisphenol A epoxy networks.

Full Recovery of Epoxy Resin Wastes into Bisphenol A and Epoxy Monomers

A mild and efficient recycling strategy is developed, where a commercially available boron catalyst is used to selectively break C (sp 3)─O bond in epoxy resins to recover bisphenol A, and the other part of epoxy resin is recovered as epoxy monomers by the reconstruction of C (sp 3)─N bond and hydroxyl cyclization, realizing the high-value and full recovery of epoxy resins.

Modification of hydrogenated Bisphenol A epoxy adhesives using

Epoxy resins based on Bisphenol A are one of the most important thermosetting materials that are widely used as adhesives because of their excellent thermal, mechanical and electrical properties [1]. One important application of these adhesives is for the conservation of stone monuments by restoring their strength, which is severely weakened by decay or accident.

Hydrogenation of High Molecular Weight Bisphenol A Type Epoxy Resin

A functional greener solvent mixture containing water, isopropyl alcohol (IPA) and ethyl acetate with the ratio 10:20:70 (wt%) was found to accelerate hydrogenation of bisphenol A type epoxy resin BE503 with a molecular weight of 1500 through an on-water mechanism, and led to an increased H 2 availability, due to high solubility of H 2 in IPA. Different carbon-based supports were tested and ...

Synthesis And Applications of Bisphenol

There are several types and applications of Bisphenol-A epoxy resin. This paper aims to review the types, synthesis, and applications of Bisphenol-A epoxy resin.

On synthesis process of hydrogenated bisphenol A epoxy resins

Hydrogenated bisphenol A epoxy resin was prepared using hydrogenated bisphenol A (HBPA) and epichlorohydrin (ECH) as the raw materials under the coexistence of solid alkali metal hydroxide,such as sodium hydroxide,and a novel catalyst.The optimum process conditions were determined by orthogonal experiment method and 1 single factor analyzing method.The structure of product was characterized by ...

TTA

The production process of hydrogenated bisphenol A epoxy resin is similar to that of bisphenol A epoxy resin. According to its main process, hydrogenated bisphenol A and epichlorohydrin are used the main raw materials, which are prepared through such steps as etherification-cyclization-purification under the catalysis effect of catalysts (generally Lewis acid, different catalysts are used by ...

In the field of chemistry, epoxy resin is a critical synthetic material widely used in construction, automotive, and aviation industries. with increasing emphasis on environmental protection and sustainable development, higher environmental standards have been imposed on epoxy resins. Hydrogenated bisphenol A (HDBPA), a common curing agent for epoxy resins, has raised concerns regarding its eco-friendliness. This article explores the reaction between HDBPA and epoxy resin and its potential applications in environmentally conscious contexts.

1. Introduction to Hydrogenated Bisphenol A

Hydrogenated bisphenol A (HDBPA) is a widely used curing agent for epoxy resins. Its molecular structure contains two benzene rings and a hydroxyl group. During the curing process, HDBPA reacts with the epoxide groups in epoxy resin through cross-linking reactions, forming a three-dimensional network structure that enhances the material's strength and water resistance.

2. Reaction Between HDBPA and Epoxy Resin

The reaction between HDBPA and epoxy resin is a complex chemical process. Under appropriate conditions, HDBPA undergoes cross-linking with the epoxide groups in the resin, resulting in a stable three-dimensional network. This process typically requires heating and the presence of a catalyst.

3. Environmental Performance of HDBPA

a. Environmental Impact

The production of HDBPA generates significant wastewater and exhaust gases, posing environmental pollution risks. Additionally, harmful substances may be released during the curing process, threatening human health. Consequently, the use of HDBPA is restricted due to environmental concerns.

b. Alternative Solutions

To mitigate HDBPA's environmental impact, researchers have developed alternative epoxy curing agents, such as bio-based curing agents and organic silicon resins. While these alternatives reduce pollution, they still have limitations.

4. Research on HDBPA Modification

To improve HDBPA's environmental performance, studies have focused on modifying its properties. Techniques like surface treatment and functional group introduction effectively reduce its environmental footprint. Additionally, optimizing production processes to minimize byproducts can further enhance HDBPA's eco-friendliness.

5. Application Prospects of HDBPA in Epoxy Resins

Despite its advantages, HDBPA remains limited in certain applications due to environmental concerns. Researchers are exploring new curing agents, such as bio-based epoxy curing agents and organic silicon resins, which could replace HDBPA in the future. These novel curing agents hold promise for greener epoxy curing solutions.

While HDBPA offers benefits as an epoxy curing agent, its environmental performance requires improvement. Through modification research and the development of new curing agents, the curing process for epoxy resins can become more sustainable. Concurrently, strengthening environmental regulations will drive the epoxy resin industry toward greener and more eco-friendly practices.