Paint chemicals

Epoxy Resin: Overview and Key Properties

Category	Details
Chemical Type	Thermosetting polymer (epoxide functional groups)
Curing Mechanism	Reacts with hardeners (amines, anhydrides, etc.)
Appearance	Clear to amber viscous liquid/solid
Key Feature	Exceptional adhesion & chemical resistance

Base Resin Types

Type	Characteristics	Common Uses
Bisphenol-A (DGEBA)	Standard grade, balanced properties	Coatings, adhesives
Bisphenol-F	Lower viscosity, higher crosslink density	Composites, electronics
Novolac	High temp resistance (>200°C)	Aerospace, automotive
Aliphatic	UV stability, flexibility	Outdoor applications

Performance Properties

Property	Typical Value
Tensile Strength	50-90 MPa
Flexural Modulus	2.5-3.5 GPa
Glass Transition Temp. (Tg)	50-250°C
Shrinkage	<3% during cure
Dielectric Strength	15-20 kV/mm

Curing Systems

Hardeners	Cure Temp	Features
Amines	RT-80°C	Fast cure, high strength
Anhydrides	100-200°C	Low exotherm, high Tg
Phenolics	150-250°C	Extreme heat resistance
Catalytic	RT-150°C	Latent curing

Applications

Industry	Primary Uses
Coatings	Marine, industrial, flooring
Composites	Carbon fiber laminates
Electronics	PCB encapsulation
Construction	Concrete repair, anchors
Art/Craft	Casting, jewelry

Processing Parameters

Parameter	Range
Pot Life	5 min-24 hrs
Demold Time	4-48 hrs
Post-Cure	2-4 hrs @ 80-150°C

Advantages vs. Alternatives

Property	Epoxy	Polyester	Polyurethane
Adhesion	Excellent	Fair	Good
Chemical Resistance	Outstanding	Moderate	Good
Cost	$$	$	$$$

Safety & Handling

Aspect	Guidelines
Skin Contact	Causes dermatitis (PPE required)
VOC Emission	Low (solvent-free formulations)
Storage	12-24 months @ 15-25°C

Market Data

Segment	Market Share	Growth Rate
Composites	35%	6.5% CAGR
Electronics	25%	7.2% CAGR
Coatings	30%	5.8% CAGR

Key Benefits and Limitations

Advantages	Limitations
Unmatched adhesion	Brittleness (without modifiers)
Minimal shrinkage	Precise mixing required
Broad formulation flexibility	Sensitive to moisture during cure

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Summary

Epoxy resins dominate high-performance applications due to their superior mechanical properties and adhesion. Ongoing innovations focus on bio-based raw materials and faster-curing systems to expand industrial and sustainable applications.

Packing:

240KG/drum

Polyetheramine (PEA) is a class of organic compounds characterized by the presence of both ether and amine functional groups. These compounds are typically synthesized by the reaction of polyols with ammonia or amines, resulting in a structure that combines the flexibility of polyether chains with the reactivity of amine groups. The general chemical structure of polyetheramines can be represented as R-O-(CH2-CH2-O)n-NH2. where R is an alkyl or aryl group, and n represents the number of repeating ethylene oxide units.

Polyetheramines are known for their versatility and are widely used in various industrial applications. One of the primary uses of polyetheramines is as curing agents in epoxy resins. The amine groups in PEA react with epoxy groups to form a cross-linked network, which enhances the mechanical properties, chemical resistance, and thermal stability of the cured epoxy. This makes them valuable in coatings, adhesives, and composites.

Another significant application of polyetheramines is in the production of polyurea and polyurethane foams. In these applications, PEA acts as a chain extender or cross-linker, contributing to the material’s elasticity, durability, and resistance to abrasion and chemicals. Polyetheramines are also used in fuel additives, where they help to clean and maintain fuel injectors by preventing the formation of deposits.

The molecular weight and the number of amine groups per molecule can be tailored to achieve specific properties, making polyetheramines highly customizable for different applications. Their low viscosity, good solubility, and compatibility with various polymers further enhance their utility in diverse fields.

In summary, polyetheramines are multifunctional compounds that play a crucial role in the development of high-performance materials. Their unique combination of ether and amine functionalities makes them indispensable in industries ranging from coatings and adhesives to fuel additives and elastomers.

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