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US 6,610,765 B1Granted
Synthetic polymers comprising additive blends with enhanced effect
AssigneeCiba Specialty Chemicals Corporation
InventorsRudolf Pfaendner, Kurt Hoffmann, Felix Meyer, Bruno Rotzinger
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Abstract
The dispersion of additives selected from the group consisting of stabilizers, antistatic agents, nucleating agents, biocides and/or flame retardants in synthetic polymers is improved by the addition of at least one polymeric dispersing or solvating agent having amphiphilic properties. Synthetic polymers stabilized in this manner are distinguished by having excellent stability against oxidative, thermal or light-induced degradation.
Claims16
A composition, which comprises
- a) a synthetic polymer subject to oxidative, thermal or light-induced degradation,
- b) at least one additive selected from the stabiliser, antistatic agent, nucleating agent, biocide and/or flame retardant group, and
- c) at least one polymeric dispersing or solvating agent based on polyacrylates, polysiloxanes, polyvinyl acetate or on block copolymers containing at least one block based on acrylate, acrylic acid or methacrylate having amphiphilic properties.
An additive blend, which comprises
- α) at least one additive selected from the stabiliser, antistatic agent, nucleating agent, biocide and/or flame retardant group, and
- β) at least one polymeric dispersing or solvating agent having amphiphilic properties.
Dependencies are inferred from the claim text.