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US 2006/0142441 A1Published application
Composition and process for improving heat and weathering stability of segmented polyurethane polymers
AssigneeCiba Specialty Chemicals Corporation
InventorsSoke Chan, Chin Goh, Muhamadzen Junaidi
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Abstract
The present invention relates to the stabilization of segmented polyurethanes by the addition of a combination of antioxidants, benzofuranones and or sterically hindered amines and a hydrazine or hydrazide.
Claims14
A composition comprising a segmented polyurethane and
- a) one or more phenolic antioxidants,
- b) a benzofuranone stabilizer and/or a sterically hindered amine stabilizer and
- c) a hydrazine or hydrazide stabilizer.
A process for improving heat and weathering resistance of a segmented polyurethane comprising incorporating into the segmented polyurethane
- a) one or more phenolic antioxidants,
- b) a benzofuranone stabilizer and/or a sterically hindered amine stabilizer and
- c) a hydrazine or hydrazide stabilizer.
(canceled)
Dependencies are inferred from the claim text.