Oxygen, heat, sunlight and water are present throughout the life cycle of the plastic article. During the manufacturing conditions polymer chains undergo cleaving by oxidation, chain branching and/or crosslinking, which can lead to a breakdown of the polymer structure. A variety of antioxidants are used to protect the plastic and maintain its molecular integrity.

Two main strategies exist to protect polymers from thermal degradation.

Primary, or phenolic antioxidants interfere with chain propagation by terminating the free radical. Phenolic antioxidants act as H-donors, offering to the peroxy radical an easily abstractable hydrogen, avoiding the abstraction of hydrogen from the polymer backbone.

Secondary, or phoshite antioxidants, transform hydroperoxides into non-radical, non-reactive, thermally stable products. Secondary antioxidants protect primary antioxidants during processing.

The combination of both antioxidant classes achieves a synergistic effect and is the generally accepted method of stabilization. 3V commercializes primary and secondary antioxidants under the ALVINOX trade name.

Blends based on phenols acting as H-donor and trivalent hydroperoxide decomposers generally exhibit a synergistic effect. 3V offers ALVIPACK blends to meet these need in a single pack or one pack.

Plastic Resins

Primary ALVINOX 100
Primary ALVINOX 110
Primary ALVINOX 176
Primary ALVINOX FB
Secondary ALVINOX HTP
Secondary ALVINOX P
Blend ALVIPACK 12
Adhesives yes yes no yes yes yes yes
Elastomers yes yes yes yes yes yes yes
Nylon yes yes no yes yes yes yes
PBT no yes no no no no no
PET no yes no no no no no
PMMA no no yes no no no no
Polycarbonate yes no no yes yes yes yes
Polyester no no no no yes no yes
Polyethylene yes yes yes yes no yes yes
Polypropylene yes yes yes yes no yes yes
Polyurethane no yes yes no no no no
POM no yes no no no no no
PVC no yes yes no no no no
Sealants, Tackifiers no yes yes no no no no
Styrenic Polymers yes yes yes yes no yes yes
Primary ALVINOX 100
Primary ALVINOX 110
Primary ALVINOX 176
Primary ALVINOX FB
Secondary ALVINOX HTP
Secondary ALVINOX P
Blend ALVIPACK 12
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