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Product classification

3A Molecular sieve activated powder

Molecular sieve activated powder

3A molecular sieve activated powder is a dehydrated synthetic zeolite powder with an effective pore opening of about 3 angstroms. Its highly selective pore structure allows it to adsorb water molecules while excluding larger compounds such as hydrocarbons. This makes it an ideal moisture scavenger for polyurethane systems, coatings, adhesives, and sealants, where it prevents unwanted bubbles and defects. The powder offers high water capacity, disperses easily, and remains chemically inert without altering the properties of the host formulation.

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Product Description

Ultra-Fine Functional Adsorbent Powder

3A Molecular Sieve Activated Powder (Type A Potassium Form)

Name: 3A Molecular sieve activated powder
SKU: 0

Engineered by processing synthetic zeolite crystals into an ultra-fine, highly reactive powder with a precise 3-angstrom pore opening. It acts as an active chemical drying agent designed to eliminate moisture, prevent bubble formation, and eliminate micro-voids in specialized polymer and coating matrices.

Effective Pore Size

~ 3 Angstroms (3A)

Particle Size (D90)

≤ 10 - 20 µm (Customizable)

Ignition Loss (Loss on Drying)

≤ 2.0 - 5.0 wt%

Reactivity

High Instant Adsorption

Rapid Kinetics & Targeted Molecular Exclusion

3A molecular sieve activated powder is created by deep-dehydrating synthetic zeolite raw powder under strict thermal controls. Because it is supplied in an unshaped, ultra-fine powder format, it blends seamlessly into liquid or paste formulations, providing immediate surface-area exposure and rapid moisture capture.

Its precise 3A potassium-form pore structure selectively traps water molecules and small polar compounds while completely excluding larger molecules like plasticizers, resins, and organic solvents. This ensures total structural compatibility without interfering with primary chemical cross-linking or curing processes.

Technical Specifications

Physical & Chemical Property	Standard Specification	Customization Options
Appearance	Fine White Powder	Optimized bulk density profiles
Pore Aperture	~ 3.0 Å (Potassium KA Type)	Strictly calibrated pore distribution
Particle Fineness (D50 / D90)	D90 < 15 µm / D50 < 5 µm	Custom micronization ranges available
Ignition Loss (1000°C)	≤ 5.0% max	Super-dried activation grades available
pH Value (5% slurry)	9.0 – 11.0	Neutralized surface options upon request

Core Application Sectors

Polyurethane (PU) Systems

Blended into polyurethane sealants, adhesives, coatings, and elastomers to absorb trace moisture, completely preventing carbon dioxide bubbling and pinhole defects.

Insulating Glass (IG) Sealants

Incorporated into secondary structural sealants and spacer matrices to scavenge residual moisture and safeguard window thermal assemblies against fogging.

Paints, Coatings & Resins

Used as an active desiccant filler in moisture-sensitive paint formulations, epoxy systems, and solvent-free coating setups to enhance shelf-life stability.

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