1、Viscosity modifying agents: Key components of advanced cement

Viscosity modifying agents (VMAs) are essential ingredients for the production of flowable cement-based materials. This paper presents an overview of commonly used VMAs and attempts to shed some light on the underlying physics at the origin of their mechanisms of action.

2、Rheology Modifiers

Our Rheovis® PU and PE series of associative thickeners stand out as a class of groundbreaking additives based primarily on hydrophobically modified polyether and polyurethane derivatives.

3、Advances in Toughening Modification Methods for Epoxy Resins: A

The study explores a variety of approaches, including the incorporation of liquid rubbers, core–shell rubber particles, thermoplastic resins, hyperbranched polymers, and the nanoparticle toughening method, each of which contributes to improving the mechanical properties and fracture toughness of epoxy resins.

Rheology Modifiers Selection Guide: Types, Features, Applications

Each type of rheology modifier has its own set of advantages, disadvantages, and ideal applications. When selecting a rheology modifier, it's essential to consider factors like compatibility, desired rheological properties, and the specific requirements of the application.

4 Additives and modifiers for epoxy resins*

In this chapter each of the main types of modifying material will be discussed with examples given of the most common types that have been employed together with the potential benefits they impart.

Silicones for Resin Modification

In this issue, we focus on silane coupling agents for resin modification, whose molecules contain two or more reactive groups which react with inorganic and organic materials, and look at their hydrolysis-condensation products, i.e. silicone resins and silicone alkoxy oligomers.

Rheology Modifiers Selection for Adhesives and Sealants

Rheology modifiers and thickeners are used in water-borne & solvent-borne adhesives, and sealants of all types. They are used extensively in water-borne formulations, and often two or more are used to achieve the required balance of properties for the particular application.

Polymer/Resin Modifier

Explore the use of polymer/resin modifiers in epoxy resins to enhance their properties and functions. Learn about types, importance, and applications.

Hydrophobic or superhydrophobic modification of cement

Hydrophobic modification protects cement-based materials from the influences of the external environment, thus enhancing the resistance to degradation processes, such as sulfate attack, carbonation processes, reinforcement corrosion, and freeze-thaw damage.

Wetting and Mechanical Properties of Modified Resins

Variations include molecular weight (MW); linear compared to pendant architecture; type of organic modification (for solubility in the formulation); and the number and type of reactive groups. While the most commonly used materials were polyether modified silicones, a few aliphatic hydrocarbon types were screened as well.

In the vast realm of modern materials science, resins—as a critical class of synthetic materials—have long been a focal point for researchers striving to optimize and enhance their properties. Among the strategies for resin modification, hydro-modification technology stands out as an efficient and environmentally friendly approach to improving resin performance. By incorporating water as a modifying agent in precise amounts, the physical and chemical properties of resins can be significantly altered to meet diverse application demands. This article explores the types and applications of resin hydro-modifying agents.

Resin hydro-modifying agents are primarily divided into two categories: organic modifiers and inorganic modifiers. Organic modifiers include aliphatic and aromatic polymers such as polyamides, polyesters, and polyurethanes. Inorganic modifiers, meanwhile, encompass compounds like silane coupling agents and phosphate esters. These modifiers interact with the resin matrix through chemical bonding or physical mechanisms, achieving objectives such as reinforcement, toughening, color adjustment, flame retardancy, and more.

Organic Modifiers

Aliphatic polymers, prized for their thermal stability and processability, are widely used. For instance, polyamide (PA) is a common plastic modifier that substantially improves heat resistance, mechanical strength, and dimensional stability. Aromatic polymers like polyetherimide (PEI) and polyphenylene sulfide (PPS), renowned for their exceptional high-temperature performance and chemical resistance, are frequently employed in aerospace, electronics, and electrical industries.

Aromatic polymer modifiers, in particular, excel in enhancing mechanical properties. Polyetheretherketone (PEEK), for example, is celebrated for its fatigue resistance and wear resistance, making it a staple in high-performance composite materials. Similarly, polyetherimide (PEI) remains indispensable in aerospace applications due to its superior heat resistance and mechanical properties.

Inorganic Modifiers

Silane coupling agents, a key class of organosilicon modifiers, form stable chemical bonds with hydroxyl groups on resin surfaces, thereby improving interfacial compatibility and mechanical strength. Their use has expanded the applicability of traditional resins like epoxy and unsaturated polyester resins, enabling them to withstand harsher environments.

Phosphate ester compounds are another prevalent inorganic modifier. They react with carboxylic acid groups in resins to form ester bonds, enhancing water resistance, acid resistance, and adhesive strength. These modifiers play vital roles in construction coatings, sealants, and composite material fabrication.

Specialty Modifiers

Beyond conventional modifiers, advanced additives such as nano-fillers (e.g., silicon dioxide, boron nitride) and carbon fibers have been integrated into resin systems. Nano-fillers, leveraging their unique physicochemical properties, notably improve thermal conductivity, electrical insulation, and mechanical performance. Carbon fibers, valued for their high strength and modulus, serve as essential reinforcements in high-performance composites.

Future Outlook

As technology advances, the diversity of resin hydro-modifying agents will continue to grow. The development of new modifiers will prioritize environmental sustainability and eco-friendliness. Concurrently, innovations in materials science will broaden the scope for resin modification. Selecting appropriate modifiers not only enhances resin performance but also reduces costs and strengthens product competitiveness. Thus, a deep understanding of resin hydro-modifying agents’ types and applications is crucial for advancing materials science.