Low basicity
Fewer interactions with acidic additives and pigments.
HALS 622 Polymeric Light Stabilizer Supplier
SUNLIGHT® 622 is a polymeric HALS with low basicity and very low volatility. It is used in PE film, PP fiber and other thin polyolefin articles, including applications with food-contact requirements.
CAS 65447-77-0 · Polymeric HALS
Product Overview
HALS 622 (butanedioic acid, dimethyl ester, polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol) has a number-average molecular weight of about 3100–4000. Its low basicity reduces interaction with acidic components and pigments, and its high molecular weight resists loss from thin sections.
Typical specification. Every shipment is supplied with a batch COA; the limits that apply to your order are confirmed in the quotation and contract.
Key Benefits
Thin sections
Low volatility and extraction for film and fiber.
Food-contact uses
Widely used where food-contact compliance is needed; ask for the statement.
Technical Specifications
Typical specification. Every shipment is supplied with a batch COA; the limits that apply to your order are confirmed in the quotation and contract.
| Parameter | Typical value |
|---|---|
| Product Name | Light Stabilizer 622 |
| Brand | SUNLIGHT® 622 |
| CAS No. | 65447-77-0 |
| Molecular Weight | Mn 3100–4000 |
| Appearance | White to light-yellow powder or granule |
| Melting Range | 50–70 °C |
| Ash | ≤0.1% |
| Volatile Matter | ≤0.5% |
Applications by Material
Pick an application to see how 622 is normally used and what to confirm before your trial.
PE Film
UV stabilizer for PE film, typically 0.1–0.6%.
What to confirm for your application
- Film gauge and target life
- Agrochemical exposure
- Food-contact requirement
PP Fiber & Tape
Used in PP fiber and tape for outdoor use.
What to confirm for your application
- Fiber or tape type
- Exposure
- Pigments
EVA, PU & Adhesives
Also used in EVA, PU and adhesives.
What to confirm for your application
- System type
- Exposure
- Existing stabilizers
Packaging & Storage
Packaging
25 kg net bags or cartons with a PE inner liner. Palletized; private-label packing on request.
Storage
Keep sealed in a cool, dry, ventilated place away from heat and direct sun. See the SDS for full handling details.
Lead time & terms
Typically 3–15 business days from order confirmation, depending on quantity. FOB, CIF or DAP to major ports.
Technical & Buying Information
Light Stabilizer 622 Buyer Guide
Define the exposure
Note the climate, the expected service life and your weathering test (xenon or QUV hours, retained elongation, gloss or ΔE). For agricultural film, list the pesticides and fumigants the film will meet.
Pick molecular weight for the part
Low-MW HALS move to the surface quickly and suit thick parts; polymeric HALS resist loss from thin films and fibers. Many outdoor packages blend both.
Check interactions
HALS are basic and can interact with acidic additives, halogenated flame retardants, some pigments and sulfur-containing antioxidants. Send your full formulation so we can flag conflicts before the trial.
Lock in supply terms
Agree physical form (powder or granule), packaging, monthly volume and documents up front. A matching CAS number alone does not qualify a new source; run your weathering test and keep the approved lot COA as the reference.
Request a Quotation for Light Stabilizer 622
Start with your material, part thickness, quantity and destination. Add your current stabilizer package and we will quote against it.
| Information | Example |
|---|---|
| Polymer / Material | PP, PE, ABS, compound, masterbatch |
| Application | Injection molding, extrusion, film, fiber |
| Current additive | Grade or supplier you use today |
| Required specification | Your TDS, COA or key limits |
| Quantity | Trial order / monthly / annual volume |
| Packaging | Standard 25 kg or specific requirement |
| Destination | Country and port |
| Documents needed | COA, SDS, REACH, food-contact statement |
Related Light Stabilizers
SUNSORB® 531
Benzophenone UV absorber for polyolefins and PVC, cost-effective and widely used.
View product →Light Stabilizer 622 FAQ
Why choose 622 over 944?
Lower basicity and food-contact use. 944 generally gives higher UV performance per unit.
What dosage is typical?
0.1–0.6% depending on thickness and exposure.
Can 622 be blended with other HALS?
Yes, blends with 944 or 770 are common in outdoor polyolefins.
Can I get a sample before ordering?
Yes. Tell us the polymer, the test you plan to run and the quantity you need. Samples ship with a COA so you can compare the lot against your current material.
What if a COA does not match our agreed specification?
Send us the agreed specification and the COA showing the difference (parameter, unit and test method). We check it with the production batch record before you accept the material, and replace or re-test where the lot is out of specification.
Discuss Your Light Stabilizer 622 Requirements
Send your application, specification and quantity to request a quotation or supporting documents.