AVAILABLE GRADES
Innovative Secondary Antioxidants
WESTON™ is a collection of high-purity liquid and solid phosphite antioxidants, and liquid phosphite esters. Designed to function as secondary antioxidants and synergize well with primary antioxidants such as hindered phenolics, WESTON™ is suitable for a variety of resins that require color, processing and thermal stability.
| Name | Type | Key Properties | Documentation |
|---|---|---|---|
| WESTON™ 398 | Liquid Phosphite | Versatile phosphite stabilizer that improves color, processing stability, and end-use of a variety of polymers. | |
| WESTON™ 399 | Liquid Phosphite | Versatile phosphite stabilizer that improves color, processing stability, and end-use of a variety of polymers; similar to WESTON® 398 but with food contact approvals. | |
| WESTON™ 430 | Liquid Phosphite Ester | Specialty alkyl phosphite antioxidant that effectively stabilizes heat, color and viscosity in a variety of polymers. | |
| WESTON™ 439 | Liquid Phosphite Ester | Phosphite ester antioxidant designed to improve color, clarity, and light stability of PVC and vinyl chloride copolymers. | |
| WESTON™ 618F | Solid Phosphite | Highly effective, phosphite-based color and molecular weight stabilizer for polymers, elastomers, and adhesives. | |
| WESTON™ 619F | Solid Phosphite | Highly effective, phosphite-based color and molecular weight stabilizer for polymers, elastomers, and adhesives; similar to WESTON® 618F but with improved hydrolytic stability. | |
| WESTON™ 705 | Liquid Phosphite | Nonylphenol-free phosphite antioxidant, designed as a drop-in replacement for TNPP with a 20% lower loading rate. | |
| WESTON™ 705T | Liquid Phosphite | Nonylphenol-free phosphite antioxidant, designed as a drop-in replacement for TNPP with a 20% lower loading rate. Similar to WESTON® 705 but with improved hydrostability. | |
| WESTON™ DPDP | Liquid Phosphite Ester | Alkyl-aryl phosphite ester antioxidant that provides color and processing stability in polymers that do not require food contact approvals. | |
| WESTON™ DPP | Liquid Phosphite Ester | Diaryl phosphite ester antioxidant with a high phosphorus content and relatively low molecular weight. Improves color and light stability in polymers that do not require food contact. | |
| WESTON™ PDDP | Liquid Phosphite Ester | Alkyl-aryl phosphite ester antioxidant that provides color and processing stability in polymers that do not require food contact approvals. Similar to WESTON® DPDP, but with a higher molecular weight and lower phosphorus content. | |
| WESTON™ TDP | Liquid Phosphite Ester | Trialkyl phosphite ester antioxidant that functions as a secondary stabilizer in a variety of polymers that do not require food contact. | |
| WESTON™ TLP | Liquid Phosphite Ester | Trialkyl phosphite ester antioxidant that functions as a sulfur deactivator and improves antifriction and antiwear characteristics in lubricants. | |
| WESTON™ TNPP | Liquid Phosphite | Versatile phosphite stabilizer that improves color, processing stability, and end-use of a variety of polymers; similar to WESTON® 399, but with a higher flash point. | |
| WESTON™ TPP | Liquid Phosphite Ester | Versatile aryl phosphite ester antioxidant that regulates viscosity, improves color, and prevents scorch in a variety of polymers. |