3A Molecular Sieve Powder for PU Adhesive System
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3A Molecular Sieve Powder for PU Adhesive System

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  • 3A molecular sieve powder




Trace water is an important issue in the production and preparation of Polyurethane (PU) products. Trace water in polyols react with isocyanate to form carbon dioxide, resulting in foaming. At the same time, a large amount of heat is released, resulting in a shorter service life.

Chemxin activated molecular sieve powders are excellent moisture scavengers for paints, varnishes, waterproofing and coatings based on polyurethane, polyurea, epoxy, acrylic and PVA.

Activated Molecular Sieve Powder is dehydrated synthetic powder molecular sieve. With the charater of high dispersibility and rapid adsorbability, it is used in some special adsorbability, it is used in some special adsorptive circumstances, such as being formless desiccant, being adsorbent mixed with other materials etc.

The powder is also available as pastes (50% dispersion in castor oil). Chemxin zeolite powders and pastes are added to solvent-free one-pack and two-pack polyurethane systems, primarily to remove water. Applications include coatings, adhesives, sealants, casting resins, sports floors and elastomers.

zeolite powder 3A 4A 5A 13X

Technical Parameter:

Model Activated Molecular Sieve Powder
Color White
Nominal pore diameter 3 angstroms; 4 angstroms; 5 angstroms; 10 angstroms
Shape Powder
Diameter (mm) 3A 4A 5A 13X
CAS NO. 308080-99-1 70955-01-0 69912-79-4 63231-69-6
Size (μm) 2~4 2~4 2~4 2~4
Bulk density (g/ml) ≥0.43 ≥0.43 ≥0.43 ≥0.43
Static water absorption (%) ≥22 ≥23 ≥26 ≥28
PH value 7~9 9~11 9~11 9~11
Sieve Residue (%) (325 mesh) ≤1.0 ≤1.0 ≤1.0 ≤1.0
Water content (%) ≤2.0 2.0 2.0 2.0
Typical Application

2K-Polyurethane coatings and mouldings
1K-Polyurethane storage protection
Storage protection for metallic pigment paint
Polysulfide and silicone systems
Carriers for chemicals for controlled release
Processing aid for polymer production
Desiccant for the production of polymer desiccant materials
Cosmetics additive
Storage protection additives for highly hygroscopic goods
Additives for flame retardants
Shift of chemical reaction by removal of water as by product


The product as a desiccant can not be exposed in the open air and should be stored in dry condition with air-proof package.

Molecular Sieve Powder Application  

Activated Molecular Sieve Powder works in Polyurethane

3a molecular sieve powder as moisture scavenger for PU adhesive system 2-4 um 3a zeolite powder equal to sylosiv k300

活化粉详情页_10Molecular Sieve Powder活化粉详情页_04


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