Oxygen, heat, sunlight and water are present throughout the life cycle of coatings. 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 coatings and maintain their 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, resulting in many antioxidants being offered as blends (single pack or one pack). Various blends to suit every customer's needs are offered by 3V under the ALVIPACK trade name.

Coatings Applications

Primary ALVINOX 110
Primary ALVINOX 176
Primary ALVINOX FB
Secondary ALVINOX P
Blend ALVIPACK 12
Resins
ALKYD yes no yes yes yes
UPES yes no yes yes yes
Special Purpose
Candles yes yes yes yes yes
GIP & Architectural
GIP- Solventborne yes yes no no no
Powder Coatings yes yes yes yes yes
Inks & Adhesives
Hot Melt yes no yes yes yes
Solvent based Systems yes no yes no no
Sealants
PU no no yes no no
Rubber based (SIS, SBR) no no yes no no
Sililated PU no no yes no no
Primary ALVINOX 110
Primary ALVINOX 176
Primary ALVINOX FB
Secondary ALVINOX P
Blend ALVIPACK 12
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