SILIPORITE® NK 20 AP 5A Molecular Sieve Powder
SILIPORITE® NK 20 AP 5A Molecular Sieve Powder - 50 Bags – Pallet (1000 kg / 2205 lb) is backordered and will ship as soon as it is back in stock.
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Buy 2+ pallets to save 7%, or 4+ pallets to save 12% — auto-applied at checkout.
| Minimum Qty | Discount |
|---|---|
| 2 + | 7% off |
| 4 + | 12% off |
SILIPORITE® NK 20 AP from Arkema is a synthetic Type A zeolite molecular sieve powder supplied in calcium-sodium aluminosilicate form.
With an effective pore opening of approximately 5 angstroms, it functions as a 5A molecular sieve capable of adsorbing water and certain other sufficiently small compatible molecules. Its powdered form is intended for incorporation into compatible polyurethane systems, coatings, sealants, adhesives, elastomers, and other industrial formulations requiring in-situ moisture control.
Product type: Powdered Type A molecular sieve
Molecular sieve grade: 5A
Effective pore opening: Approximately 5 Å
Primary use: Moisture and small-molecule adsorption in compatible formulations
Manufacturer: Arkema
Where it fits
- Polyurethane systems: In-situ moisture adsorption in compatible one-component and two-component formulations.
- Paints and coatings: Moisture control in formulations where residual water may contribute to gassing, bubbling, blistering, pinholes, or other surface defects.
- Sealants and adhesives: Reduction of trace moisture that may interfere with storage stability, cure consistency, adhesion, or finished-product performance.
- Elastomers: Moisture scavenging in compatible polymer systems and reactive formulations.
- Molecular-sieve pastes: Powdered adsorbent for incorporation into compatible castor-oil and other carrier systems.
- Chemical formulations: Adsorption of water and certain other sufficiently small molecules where a 5 Å pore opening is appropriate.
- General industrial processing: Formulation-based drying and small-molecule adsorption subject to process qualification.
Why choose SILIPORITE NK 20 AP?
- Approximately 5 Å pore opening: Adsorbs water and certain other compatible molecules small enough to enter the zeolite structure.
- Powdered form: Designed for incorporation into compatible liquid, paste, coating, adhesive, sealant, and elastomer systems.
- Broader adsorption window: Offers less molecular-size selectivity than 3A and 4A grades where adsorption beyond water is desired.
- Moisture-defect control: May help reduce water-driven foaming, gassing, bubbling, and cure inconsistencies in qualified formulations.
- Flexible formulation use: Suitable for evaluation in both one-component and two-component reactive systems.
- Industrial pallet format: Available from Sorbents Direct in 1,000 kg pallet quantities.
- Manufacturer documentation: Current SDS, TDS, and lot-specific documentation may be requested when available.
Typical product information
| Product name | SILIPORITE® NK 20 AP |
|---|---|
| Product type | Synthetic Type A zeolite molecular sieve powder |
| Chemical form | Calcium-sodium aluminosilicate |
| Molecular sieve grade | 5A |
| Effective pore opening | Approximately 5 Å |
| Physical form | Fine molecular sieve powder |
| Primary function | Moisture and compatible small-molecule adsorption |
| Manufacturer | Arkema |
| Current Sorbents Direct package | 50 × 20 kg bags per pallet - 1,000kg total |
Exact water capacity, particle-size distribution, settled density, loss on ignition, and other grade-specific limits should be confirmed using current manufacturer documentation or the applicable lot-specific COA.
How powdered 5A molecular sieve works
| Property | Process relevance |
|---|---|
| Approximately 5 Å pores | Allows water and certain other small compatible molecules to enter the internal zeolite structure while excluding larger molecules. |
| Calcium-exchanged Type A structure | Creates a larger effective pore opening than potassium-form 3A or sodium-form 4A molecular sieves. |
| Powdered form | Supports dispersion through compatible coatings, adhesives, sealants, elastomers, pastes, and reactive formulations. |
| In-situ adsorption | Allows moisture to be captured directly within a formulation rather than through a separate packed drying bed. |
| Broader adsorption behavior | May adsorb desirable formulation components as well as unwanted moisture, making compatibility testing important. |
NK 20 AP vs. NK 10 AP and NK 30 AP
| Selection factor | NK 20 AP | NK 10 AP | NK 30 AP |
|---|---|---|---|
| Molecular sieve type | 5A | 4A | 3A |
| Effective pore opening | Approximately 5 Å | Approximately 4 Å | Approximately 3 Å |
| Relative selectivity | Broadest adsorption window of the three grades | Intermediate adsorption window | Most selective for water |
| General consideration | Evaluate where adsorption of water and other small compatible molecules is desired | Evaluate for high-capacity moisture adsorption where broader uptake than 3A is acceptable | Evaluate where stronger water selectivity and exclusion of larger molecules are priorities |
| Current Sorbents Direct package | 1,000 kg bagged pallet | 1,000 kg bagged pallet | 600 kg bag pallet or 320 kg drum pallet |
Final selection should be based on formulation chemistry, target moisture, potentially adsorbable ingredients, pot-life requirements, cure behavior, and finished-product performance.
Application and trial guidance
- Test the material using the actual resin, solvent, pigment, coating, adhesive, sealant, elastomer, or carrier system.
- Confirm compatibility with formulation viscosity, settling, pot life, cure response, adhesion, appearance, gloss, and mechanical properties.
- Add using suitable mixing and dust-control equipment to achieve uniform dispersion.
- Minimize exposure to ambient humidity before and during incorporation into the formulation.
- Optimize dosage based on incoming moisture, target residual water, formulation chemistry, and processing conditions.
- Evaluate whether the 5 Å pore opening adsorbs solvents, additives, catalysts, plasticizers, or other desirable formulation components.
- For polyurethane systems, verify gassing, bubbling, storage stability, cure consistency, adhesion, and finished-surface quality.
- For molecular-sieve pastes, evaluate viscosity, settling, redispersibility, shelf stability, and compatibility with the carrier.
- Complete application-specific qualification before commercial production.
Qualification note: A 5A molecular sieve has a broader adsorption window than 3A or 4A material. It may capture desirable small molecules in addition to water. Controlled formulation testing is therefore essential before commercial use.
Packaging & availability
| Sorbents Direct variant | Configuration |
|---|---|
| 50-bag pallet | 50 × 20kg bags - 1,000kg total (approximately 2,205lb) |
- Ordering format: Palletized quantities only.
- Lead time: Typically 2-4 weeks, subject to inventory, quantity, and destination.
- Freight: Palletized LTL freight calculated at checkout or confirmed by quotation.
- Volume discounts: Current automatic quantity discounts are displayed on the product listing.
- Larger requirements: Contact Sorbents Direct for recurring pallets, scheduled releases, or other manufacturer-supported packaging.
Storage and handling
- Store in the original sealed packaging in a dry, covered location.
- Keep packaging tightly closed until the material is ready to be incorporated into the formulation.
- Reseal partially used bags immediately to reduce atmospheric moisture pickup.
- Minimize exposure to humid air during transfer, weighing, and mixing.
- Use suitable local exhaust ventilation where airborne powder may be generated.
- Avoid breathing dust and wear personal protective equipment specified by the current SDS and site risk assessment.
- Use clean, dry transfer and mixing equipment.
- Protect the powder from liquid water, oils, solvents, dust, and other foreign contamination during storage.
Important: Active molecular sieve begins adsorbing moisture immediately after exposure to air. Request and review the current Arkema Safety Data Sheet before handling, transfer, cleanup, or disposal.
Why buy from Sorbents Direct?
Sorbents Direct helps industrial buyers evaluate molecular-sieve type, pore opening, formulation requirements, package configuration, documentation, and freight before ordering.
- Industrial pallet quantities for production-scale formulation and chemical-processing requirements.
- Manufacturer documentation support for technical and workplace review.
- Lot-specific COA support when available for shipped material.
- Grade-comparison assistance when evaluating 3A, 4A, and 5A molecular sieve powders.
- Application discussion based on formulation chemistry, moisture target, processing method, and annual volume.
- Transparent pallet pricing and freight support for industrial buyers.
Documentation & technical support
A current public Arkema Technical Data Sheet specific to SILIPORITE NK 20 AP was not located during this review. The applicable Safety Data Sheet, Technical Data Sheet, and lot-specific Certificate of Analysis may be requested through Arkema or the supplying distributor when available.
Visit our Documentation Center or contact Sorbents Direct to discuss your formulation, moisture target, potentially adsorbable ingredients, pallet quantity, and expected annual volume.
Questions & answers
What is SILIPORITE NK 20 AP?
SILIPORITE NK 20 AP is a powdered synthetic Type A molecular sieve from Arkema. Its calcium-sodium aluminosilicate structure provides an effective pore opening of approximately 5 angstroms.
Is NK 20 AP a 5A molecular sieve?
Yes. Its approximately 5 Å pore opening allows it to adsorb water and certain other compatible small molecules while excluding larger molecules.
What is the difference between NK 20 AP, NK 10 AP, and NK 30 AP?
NK 20 AP is a 5A grade, NK 10 AP is a 4A grade, and NK 30 AP is a 3A grade. The larger 5 Å pore opening gives NK 20 AP the broadest adsorption window, while the smaller 3 Å opening of NK 30 AP provides stronger water selectivity.
Can NK 20 AP adsorb VOCs?
A 5A molecular sieve can adsorb certain small molecules that fit within its pore structure. Whether a particular VOC is adsorbed depends on molecular size, shape, polarity, concentration, formulation chemistry, and competing adsorbates. Application testing is required.
Can it be used in polyurethane systems?
It is offered for evaluation as a moisture-scavenging powder in compatible polyurethane and other reactive formulations. The complete system should be tested for gassing, bubbling, pot life, cure response, adhesion, and finished-product performance.
Can it be added directly to coatings, sealants, or adhesives?
The powdered form is intended for incorporation into compatible formulations. Appropriate mixing, dust control, dosage optimization, and performance qualification are required.
Could it adsorb ingredients other than water?
Yes. Because its pore opening is larger than that of 3A or 4A material, it may adsorb certain desirable small molecules. Compatibility and recovery should be evaluated using the actual formulation.
What is its water adsorption capacity?
A verified NK 20 AP grade-specific water-capacity specification is not currently shown on this page because a current public Arkema TDS was not available. Request the current technical sheet before relying on a numerical capacity value.
What is the particle size?
SILIPORITE NK 20 AP is supplied as a fine molecular sieve powder. A verified numerical particle-size limit should be taken from the current Arkema TDS or lot-specific documentation.
What package size is available?
The current Sorbents Direct listing offers a 1,000 kg pallet containing fifty 20 kg bags.
Are smaller quantities available?
This product is currently listed as a palletized 1,000 kg order. Smaller individual bags are not offered through the current listing. Please reach out if you need alternative sizes.
What documentation is available?
The current Safety Data Sheet, Technical Data Sheet, and lot-specific Certificate of Analysis may be requested when available from Arkema or the supplying distributor.
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