Chimassorb 944 Cas 71878-19-8

Chimassorb 944 cas 71878-19-8

Chimassorb 944 (CAS 71878-19-8), also known as UV Absorber 944 or UV 944, is a high-performance hindered amine light stabilizer (HALS) widely used in plastics, coatings, and other polymer materials to protect against UV degradation. Unilong provides reliable supply of Chimassorb 944 for industrial manufacturers.

Advantages of Use
1. The polymer polymerization structure is low in volatility, resistant to water extraction, and has low migration. During high-temperature extrusion and injection molding, there is almost no smoke. Thin products (films, fibers, flat wires) have outstanding weather resistance, and they are not prone to leaching and loss even after being washed by rain.
2. Chimassorb 944 has both light stability and long-term thermal oxygen stability functions, and at the same time improves the thermal aging performance of outdoor products. It is applicable to thin sections and thick-section polyolefin products, and performs exceptionally well for PE thick products.
3. Chimassorb 944 has good compatibility with PP, PE, EVA, TPO, ABS, soft and hard PVC, POM, PA. It can meet some indirect food contact compliance requirements.
4. Chimassorb 944 can be compounded with UV absorbers and main and auxiliary antioxidants to produce significant synergistic weather resistance effects. It has high cost performance and is a mainstream brand of polyolefin general HALS.

Specification

Key Features

Strong UV absorption and excellent light stabilization.

Protects polymers from yellowing, cracking, and degradation.

Compatible with a wide range of plastics, coatings, and resins.

High thermal and chemical stability for industrial processing.

Applications

• Plastics Industry: Prevents UV-induced aging and prolongs material lifespan.

• Coatings and Paints: Enhances durability and color retention under sunlight.

• Industrial Polymers: Applied in films, sheets, and molded products for long-term UV protection.

Packing and Storage

25kgs/drum, 9tons/20’container

Storage temperature: 5 – 30℃ in a cool, dry, well-ventilated warehouse, protected from light and away from heat sources;严禁 stacking at high temperatures to prevent particles from softening， adhering and forming lumps； The relative humidity of the environment should be controlled at 40 – 65%， and moisture prevention is crucial.
Store in an airtight manner， using a PE bag liner in a cardboard barrel / cardboard box；严禁 leaving it open to prevent moisture absorption， lumps formation， and dust contamination； In a dry environment， static electricity is likely to occur， so operation should be anti-static.
Original factory sealed shelf life： 24 months； After opening， tightly seal the inner bag， and it is recommended to use it within 12 months.

FAQ

Q: The materials are slightly yellowish. Is the product ineffective?
A: Slight light yellowing is normal; obvious deep yellow or brown color indicates heat oxidation, which will affect the color of the product; it is necessary to conduct a small-scale test before production; storage must be kept in a cool and dark place.

Q: If there is a lump in storage, can the product be put into use?
A: Squeeze out the loose lump, break it up and screen it for qualification, then it can be used normally; if the lump is damp or heated and becomes a hard lump that cannot be dispersed, the product will have fish eyes and spots, and it is prohibited to put it into use; storage must be moisture-proof and sealed.

Q: Can it be used together with sulfur-based and halogen-based flame retardants?
A: Sulfur and halogens will weaken the 944 light stability effect; if used together, a small-scale test of the formula must be conducted, and the conventional addition amount cannot be directly copied.

Q: What are the benefits of combining with UV absorbers?
A: 944 captures free radicals, and UV absorbers block ultraviolet rays. The two work together to significantly extend the service life of outdoor products. This is the standard combination scheme for outdoor plastics.

Q: What is the minimum order quantity (MOQ)?
A: For industrial bulk goods, the regular minimum order quantity is 25 kg; small samples can be provided for formula testing, and a sample fee will be charged for the small samples, while the sample fee can be negotiated and deducted from the large order.

Q: What is the delivery cycle/lead time?
A: For ready-made inventory: 3-10 working days after receiving the full payment; for custom specifications orders: 15-22 working days; confirm the inventory before placing the order.