1、Isocyanate (MDI) Modified Epoxy Resin

It improves the brittleness of epoxy resin after curing, and is used to improve the toughness of epoxy resin system, and improve the bonding strength or peel strength. Isocyanate-modified epoxy resin is a reaction between isocyanate and epoxy resin.

2、改性异氰酸酯

ChemicalBook 致力于为化学行业用户提供改性异氰酸酯的性质、化学式、分子式、比重、密度,同时也包括改性异氰酸酯的沸点、熔点、MSDS、用途、作用、毒性、价格、生产厂家、用途、上游原料、下游产品等信息。

3、异氰酸酯改性环氧树脂_环氧树脂网

前言：随着线路板等电子电器的短、小、轻、薄化，以及电子电器的高性能，耐药品性，耐热性的要求不断提高，高密度电了元器件封装的要求不断提出，以及无卤化环氧树脂性能不断完善，合成既耐热，又强韧的环氧树脂成为必须，在高分子互穿网络理论指导下，合成异氰酸酯改性环氧树脂，并初步使用于覆铜板，取得了一定效果。 根据高分子互穿网络原理，在环氧树脂结构中带有恶唑酮环的环氧树脂、固化后其耐热性、柔韧性俱佳。 将无锡大禾提供的异氰酸酯改性环氧树脂直接用Dicy固化，考察其性能。 将异氰酸酯改性环氧树脂直接用Dicy固化，当量比为0.5。 胶水的GT值分别为298s。 胶水用7628玻纤布进行浸胶，然后在155℃烘箱烘焙10min，半固化片表观良好。 …

Isocyanates

Prepolymers are modified isocyanates accessible by a reaction of isocyanates or isocyanate mixtures with polyether polyols. BASF’s isocyanate mixtures and prepolymers have been designed to provide excellent processing performance combined with outstanding mechanical properties of the final product.

ISONATE™ 143L Modified MDI

A unique combination of high modified MDI content, available carbodiimide, and liquid state allows ease of handling, ease of processing and maintenance of high physical properties under strenuous wear and environmental conditions

Isocyanate (MDI)

Product Description YH-MER0113is an isocyanate (MDI)-modified epoxy resin designed to enhance the flexibility of epoxy systems. The reaction between epoxy groups and isocyanate generates oxazolidone, a five-membered heterocyclic structure known for its high thermal stability.

Modified isocyanate

Modified isocyanates may additionally contain at least one other free isocyanate group and/or at least one other isocyanate group blocked by blocking agent or mixture of (preferably at least two) thermolabile blocking agents.

Preparation and characterization of hybrid resin from used urea

Isocyanate resins have many outstanding features, such as high water resistance and good bonding stability. The most attractive aspect for using an isocyanate resin for UF resin modification is attributed to the possible chemical reactions between these two resins.

Isocyanate resins

Unlike the epoxy resins where the members differ only in their size, the isocyanate resins differ markedly according to the choice of components, but all have the common feature of a diisocyanate as one of the components.

Understanding Isocyanates: The Backbone of High

Isocyanates are reactive chemical compounds containing one or more isocyanate groups (-NCO). They are most commonly used as crosslinkers and curing agents in polyurethane, polyurea, and epoxy formulations.

In modern materials science, modified isocyanate resin stands as an indispensable high-performance synthetic material. Widely utilized across multiple fields due to its exceptional physical and chemical properties, it continues to expand its applications through unique modification technologies. This article explores the definition, characteristics, application domains, and fundamental principles and methods of modification for modified isocyanate resin.

1. Definition of Modified Isocyanate Resin

Modified isocyanate resin is a polymer material derived from isocyanate compounds, with specific functional groups or structures introduced via chemical reactions to achieve targeted properties. These functional groups—including plasticizers, curing agents, flame retardants, and anti-aging agents—endow the resin with tailored mechanical strength, thermal stability, electrical insulation, chemical resistance, and more.

2. Characteristics

Modified isocyanate resin possesses several superior properties, making it a preferred base material for high-performance applications:

1. High Elasticity: Modified materials exhibit extremely high elastic moduli, suitable for manufacturing parts requiring strength and flexibility.
2. Excellent Processability: Its good flowability and plasticity enable convenient molding via injection, extrusion, compression, and other processes.
3. Heat Resistance: Certain formulations maintain structural stability at high temperatures, ideal for aerospace, electronics, and other demanding fields.
4. Electrical Insulation: Modified isocyanate resins offer robust dielectric properties, fitting for protective layers in electronic devices.
5. Chemical Resistance: Superior resistance to most chemicals makes it widely used in industrial equipment, pipelines, and corrosive environments.
6. Eco-Friendliness: Some modifications incorporate bio-based or renewable resources, reducing environmental impact.

3. Application Fields

Owing to its exceptional performance, modified isocyanate resin is extensively applied in:

1. Automotive Industry: For automotive interiors, exteriors, tires, and seals.
2. Electronics and Electrical Engineering: In circuit board substrates, cable sheathing, and transformer components.
3. Construction Materials: For flooring, ceilings, and wall coverings.
4. Sports Equipment: Used in shoe soles, basketball hoops, and athletic gear.
5. Medical Devices: For surgical instruments, medical catheters, and implants.
6. Aerospace: In aircraft fuselages, satellite components, and aerospace structures.
7. Petrochemicals: For corrosion-resistant pipelines, valves, and industrial equipment.
8. Environmental Protection: In water treatment facilities and exhaust gas purification systems.

4. Basic Principles and Methods of Modification

Modification involves introducing specific functional groups into isocyanate resin molecules through chemical reactions, altering their structure and properties. Common techniques include:

1. Copolymerization: Incorporating diverse monomers into the resin chain to form block, graft, or star-shaped polymers.
2. Cross-Linking: Adding cross-linking agents to create three-dimensional networks, enhancing strength and heat resistance.
3. Graft Copolymerization: Integrating functional monomers via graft reactions to achieve multifunctionality.
4. Surface Modification: Altering surface properties (e.g., hydrophilicity, wear resistance) through physical or chemical treatments.
5. Nanocomposite Technology: Leveraging nanoparticles’ high surface area and reactivity to improve performance.

modified isocyanate resin shines as a versatile and high-performance material in materials science. As technology advances and demands evolve, its applications will broaden further, while its properties continue to be optimized and enhanced.