Industrial Expandable Microsphere Physical Foaming Additive for PVC, PP, PE and Coatings
Buyer-facing sourcing candidate for expandable thermoplastic microspheres used as a physical foaming additive in PVC, PP, PE, EVA, rubber, plastics and coating applications. Key checks should focus on exact grade identification, CAS applicability for a formulated microsphere product, particle size range, expansion temperature profile, residual volatile hydrocarbon content, powder appearance, packing format, export documents and dangerous goods classification before RFQ or sampling.
Quick buying facts
Identify the grade, package, and import market before comparing suppliers.
Use this page to check the product identity, common specification points, document scope, package notes, and destination-market questions before sending a China sourcing request.
Reported CAS No.: 25133-97-5; buyer should verify whether this CAS applies to the polymer shell, component, or whole formulated productExpandable microsphere physical foaming additive / plastic auxiliary agentCandidate for RFQ after CAS, SDS, grade and DG transport verification
Reported CAS No.: 25133-97-5; buyer should verify whether this CAS applies to the polymer shell, component, or whole formulated product
Reported EINECS: 253-242-6; confirm against SDS and COA
Reported formula: C14H22O6; confirm relevance because expandable microspheres are typically formulated polymer-shell products containing volatile blowing medium
Appearance: white powder
Typical particle size stated on source page: 25–35 um
Model/grade shown: WS606; confirm equivalent commercial grade and production origin
Application polymers stated: PVC, EVA, PE, PP, rubber and coating systems
Foaming type: physical expansion microsphere, not ADCA chemical blowing agent
Expansion behavior: request start expansion temperature, peak expansion temperature, maximum expansion ratio and final expanded density
Impurity and quality points to request: moisture, residual monomer, residual solvent or volatile hydrocarbon content, ash, sieve residue, agglomerates, bulk density and particle-size distribution
HS code stated: 3824999999; confirm with exporter and importer customs broker
Who uses this page
Target buyers
Vietnam plastics compounders requiring lightweight PVC, PP, PE or EVA formulations
Coating and sealant manufacturers evaluating physical foaming or density reduction additives
Rubber and plastic product factories using extrusion, injection molding, press molding or blow molding
Import distributors handling specialty plastic additives and foaming agents
Technical procurement teams comparing physical microspheres with chemical blowing agents
Before matching
Documents to check
CAS number, grade, assay, and impurity profile
SDS, COA, TDS, HS code, and transport classification
Destination-market import documents before supplier matching
Package and route
Packing notes
Reported packing: 20 kg per bag
Request inner liner details, moisture barrier, palletization and container loading plan
Confirm whether nitrogen packing, vacuum packing or anti-static packaging is used if applicable
Request shelf-life, storage-condition statement and unopened-bag stability data from supplier documentation
Ask whether sample packing differs from commercial export packing
Applications and sourcing options
Check whether this product fits the buyer's actual application.
Clear application, grade, package, and document notes help separate real sourcing demand from a vague price check.
Use context
Common applications
Density reduction in plastic or rubber compounds
Surface-smooth lightweight PVC, PP, PE or EVA molded products
Coating systems requiring controlled micro-cellular structure
Extrusion, injection molding, press molding and blow molding trials where an expandable microsphere grade is technically validated
Alternative evaluation where ADCA-type chemical foaming agents are not desired
How we compare
Sourcing options
Request sample with full SDS, TDS and COA before bulk order
Compare at least two particle-size and expansion-temperature grades for the intended polymer process
Ask for CIF Vietnam and FOB China quotations separately to compare logistics control and DG freight cost
Use pre-shipment third-party inspection for packing, lot number, labeling and document consistency
Confirm whether product origin is China or Japan, as the listing states Japan origin while the supplier is China-based
Consider supplier audit or document verification because the listing references multiple product names and brands
Human review
Compliance notes
Request latest SDS in English and, if importing to Vietnam, Vietnamese-language SDS support if available
Confirm dangerous goods classification for air, sea and road transport because expandable microspheres may contain encapsulated low-boiling hydrocarbon
Request UN number, proper shipping name, hazard class, packing group and marine pollutant status if classified as DG; if non-DG, request written basis and carrier-accepted documentation
Verify CAS, EINECS and HS code against COA, SDS and import broker review before purchase
Request certificate of analysis per lot and technical data sheet for the exact grade supplied
Check whether the product is a mixture; do not rely on a single CAS number for import declaration without SDS confirmation
Confirm export documents available: commercial invoice, packing list, COA, SDS, certificate of origin and any fumigation or pallet treatment certificates where applicable
For Vietnam sourcing, buyer should check local import requirements, chemical declaration obligations and plastics/coatings additive registration needs with a qualified local advisor
Buyer search paths
Related sourcing terms
These terms support long-tail discovery while keeping the page focused on useful product and China export buying context.
expandable microsphere foaming agentphysical foaming additivePVC foaming additivePP PE foaming microspheresthermo-expandable microspheresplastic auxiliary agentcoating additive China export to Vietnammicrosphere blowing agentlightweight plastic additiveclosed-cell microsphere additive
Related product options
Build a broader quote package from adjacent options.
Buyers often compare neighboring grades, forms, or route options before sending one consolidated RFQ.
Share target market, quantity, packaging scope, artwork status, delivery destination, and required documents so CHN Chemicals can prepare a cleaner supplier comparison.
Questions to confirm
What is the exact manufacturer, grade name and model number supplied: WS606, ADVANCELL EM, MINICELL EM or another equivalent grade?
Is CAS 25133-97-5 assigned to the full product, polymer shell component or another ingredient? Please provide SDS composition section and COA.
What are the start expansion temperature, peak expansion temperature and recommended processing-temperature window for PVC, PP, PE and coatings?
What is the D50 particle size and full particle-size distribution, including oversized particles and agglomerate limits?
What are the moisture, volatile content, residual monomer, residual solvent, ash and sieve residue specifications?
What is the unexpanded bulk density and expected expanded density under standard test conditions?
Is the product classified as dangerous goods for sea freight or air freight? Please provide transport classification from the SDS.
Can you provide a recent lot COA, TDS, SDS and export packing photos before sample order?
Checks before quote
Request latest SDS in English and, if importing to Vietnam, Vietnamese-language SDS support if available
Confirm dangerous goods classification for air, sea and road transport because expandable microspheres may contain encapsulated low-boiling hydrocarbon
Request UN number, proper shipping name, hazard class, packing group and marine pollutant status if classified as DG; if non-DG, request written basis and carrier-accepted documentation
Verify CAS, EINECS and HS code against COA, SDS and import broker review before purchase
Request certificate of analysis per lot and technical data sheet for the exact grade supplied
Check whether the product is a mixture; do not rely on a single CAS number for import declaration without SDS confirmation
Confirm export documents available: commercial invoice, packing list, COA, SDS, certificate of origin and any fumigation or pallet treatment certificates where applicable
For Vietnam sourcing, buyer should check local import requirements, chemical declaration obligations and plastics/coatings additive registration needs with a qualified local advisor
Next step
Send the product page with your target quantity and market. A sourcing manager can then confirm sample options, supplier fit, packaging details, and open document gaps.
