Low basicity
Fewer interactions with acidic additives and pigments.
SUNLIGHT® 622
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
- Lot COA with every shipment
- Samples for your trials
- Technical support for your trial
Product overview & key benefits
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.
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
| 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% |
Typical specification. Every shipment is supplied with a batch COA; the limits that apply to your order are confirmed in the quotation and contract.
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%.
Check before trial
- Film gauge and target life
- Agrochemical exposure
- Food-contact requirement
PP Fiber & Tape
Used in PP fiber and tape for outdoor use.
Check before trial
- Fiber or tape type
- Exposure
- Pigments
EVA, PU & Adhesives
Also used in EVA, PU and adhesives.
Check before trial
- System type
- Exposure
- Existing stabilizers
Selection & comparison
Selecting a Light Stabilizer
| Your requirement | What usually works |
|---|---|
| Thick PP and PE parts | Low-MW HALS (770) for fast migration to the surface |
| Thin films, tapes and fibers | Polymeric HALS (944, 622) for low volatility and extraction resistance |
| Agricultural film exposed to pesticides | Polymeric HALS with good resistance to acidic residues; ask about the specific chemicals |
| Automotive and industrial coatings | Liquid HALS (292) with a UV absorber |
| Acid-catalyzed coatings | Non-basic NOR-type HALS (123) |
| Long outdoor life | HALS plus UV absorber, often a blend of a low-MW and a polymeric HALS |
| Replacing an existing grade | Send your current TDS or COA; we match on the parameters you approve |
Light Stabilizer Comparison
Swipe or scroll horizontally to see all columns →
| Product | Type | Mol. weight | Form | Best fit | Typical starting level* |
|---|---|---|---|---|---|
| SUNLIGHT® 622 | Polymeric HALS | Mn 3100–4000 | Powder or granule | PE film, PP fiber | 0.1–0.6% |
| SUNLIGHT® 944 | Polymeric HALS | Mn 2000–3100 | Granule or powder | PP/PE film, tape, fiber | 0.1–0.6% |
| SUNLIGHT® 770 | Monomeric HALS | 480.7 | White powder or granule | Thick PP, PE, styrenics | 0.1–0.5% |
| SUNLIGHT® 119 | High-MW HALS | 2286 | White powder or granule | Thin PP/PE articles, long outdoor life | 0.1–0.5% |
| SUNSORB® 531 | Benzophenone | 326.4 | 47–49 °C | PE, PP, PVC | 0.1–0.5% |
*Starting points for trials, not fixed recommendations. The right level depends on part thickness, pigments, fillers, agrochemical exposure and target service life. Combining a HALS with a UV absorber is usual for outdoor use.
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.
From first email to approved supply
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.
Tell us your requirement. We match the grade.
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 products
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.
