Patents on Stabilizers

Patent profile:

The invention relates to a method for lowering the crystallization temperature of semicrystalline polyamides, wherein at least one semicrystalline polyamide or mixtures of at least two semicrystalline polyamides are mixed with at least one polyfunctional transesterification-capable organic phosphonite, organic phosphite, organic phosphate or mixtures thereof. 

Benefits for potential applications:

• Enables delayed/limited crystallization in PA6/PA66 and other partially crystalline polymers, supporting transparent or translucent parts after fast cooling
• Improved dimensional stability: reduced shrinkage/warpage by lowering crystallinity
• Color‑neutral antinucleation (no Nigrosin); broad color matching possible
• Expanded processing window for injection molding, extrusion, film, and additive manufacturing (SLS/3D print)
• Tunable melt rheology via controlled branching (higher zero‑shear viscosity) for better melt strength in films/foams
• Works across aliphatic and semi‑aromatic PAs; preferred with end‑group‑blocked grades

Patent profile:

The present invention relates to the use of efficient phosphorous substances, in particular based on diphenylamine and heterocyclic diphenylamine derivatives such as phenothiazine as stabilisers for organic materials, in particular for plastic materials and elastomers, against oxidative, thermal and/or actinic degradation. The present invention also relates to an organic material which is correspondingly stabilized, a process for stabilizing organic materials specific stabilizers.

Benefits for potential applications:

• High processing and long-term stability: maintains melt viscosity; and limits MVR increase and polymer degradation during repeated extrusion
• Dual action: radical scavenging (amine core) plus hydroperoxide decomposition (phosphite/phosphonite) for broad-spectrum protection
• Hydrolysis-resistant, low-volatility, low-migration designs; minimal discoloration
• Effective at low dosages; reduces additive footprint while improving durability
• Broad polymer compatibility (polyolefins, styrenics, PVC, polyesters incl. PLA/PET/PBT, PA, PC, POM) and use in coatings, lubricants, and monomers
• Synergistic with phenolic AOs, HALS, UV absorbers, hydroxylamines, and thio-synergists; flexible additive packages
• Supports recycling: stabilizes reprocessing and properties in recyclates

Patent profile:

The invention relates to compounds r providing stabilization with respect to oxidative thermal and/or actinic decomposition of or damage to organic materials. The compounds combine sulfuric stabilizer units and phenolic antioxidant groups in one molecule. The invention further relates to a method for producing such compounds, to compositions containing said compound, to a method for stabilizing organic compounds by means of the stabilizing compounds, and to the use of the stabilizing compounds to stabilize organic materials.

Benefits for potential applications:

• Plastics/components: extended service life; reduced embrittlement and discoloration.
• Elastomers/seals: better retention of elasticity and mechanical strength under heat/oxygen.
• Lubricants/oils: enhanced oxidative stability under high-temperature operation.
• Novel stabilizers combining synergistic primary and secondary antioxidants in one molecule
• Supports processing stability and long-term heat aging
• Compatible with conventional antioxidants, UV absorbers, and HALS for tailored protection packages

Patent profile:

The present invention relates to the use of hydroxycarboxylic acid salts for stabilising thermoplastic condensation polymers, a stabilised moulding composition and moulding compositions produced therefrom. 

Benefits for potential applications:

• Maintains molecular weight during melt processing (lower MVR; reduced polymer degradation)
• Reduces thermal, oxidative, and actinic degradation; preserves mechanical/optical performance
• Bio‑compatible, cost‑effective salts (e.g., citrate, malate, tartrate, alginate); ideal for bio‑based polyesters
• Compatible with common additive packages (phenolic/amine/lactone AOs, HALS, nucleators, chain extenders)
• Easy integration via standard compounding or masterbatch; low dosage requirements