Patents on Bio-based Stabilizers

Patent profile:

The present invention relates to a method of stabilizing virgin thermoplastic material against oxidative, thermal and/or actinic degradation. In the method of the invention, at least one polyphenol and at least one alditol and/or cyclitol are introduced into a virgin thermoplastic material. The method of the invention can stabilize virgin thermoplastic material with high efficacy and in a very environmentally friendly and inexpensive manner against oxidative, thermal and/or actinic degradation. Stabilizer compositions, a process for stabilizing plastics and mouldings are claimed additionally.

Benefits for potential applications:

• High-efficiency, eco-friendly stabilization: bio-derived components (e.g., tannins/quercetin with mannitol/erythritol/inositol) reduce oxidative, thermal, and actinic (UV) degradation.
• Processing and long-term protection: lower melt-flow rise (MVR) and reduced polymer degradation  during extrusion; improved heat-aging retention (reduced property loss/yellowing).
• Primary–secondary AO-like synergy without petrochemical phosphites; can be used alone or alongside conventional phenolic and phosphite/HALS packages.
• Broad polymer coverage including polyolefins (PP/PE), styrenics, POM, PC, PA, PET/PBT, and bioplastics (PLA, PBS, PHAs).

Patent profile:

The present invention relates to an oligomeric or polymeric phosphite, or to a composition comprising said oligomer or polymer, which are particularly useful as a stabiliser for organic materials. The present invention also relates to an intermediate for the synthesis of the above-mentioned oligomers or polymers.

Benefits for potential applications:

• Low migration and low volatility due to oligomer/polymer architecture; reduced blooming and extraction
• Strong processing and long-term stabilization under heat and oxygen; preserves mechanical and optical properties
• Sustainable chemistry: partly or largely from renewable feedstocks (tocopherol-based); alternative to petrochemical antioxidants
• Synergy with conventional stabilizers (primary phenolics/amines/lactones, HALS, UV absorbers, acid scavengers)
• Tunable performance via co‑oligomers (e.g., integrating HALS or varied diols) to optimize compatibility and light stability
• Broad substrate compatibility: polyolefins, styrenics, PVC, polyesters (incl. PLA, PBS, PBSA), polyamides, PC, elastomers; oils/lubricants; inhibition of premature polymerization in acrylates, styrene, etc.