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US 11,111,215 B2Granted
Piperidine-based stabilizers and polymers end-capped with the same
AssigneeSolvay Specialty Polymers USA, LLC
InventorsJoel Pollino, Satchit Srinivasan, Henry Bradley, Claire Hartmann-Thompson, Gregory Goschy
Life of this patent
Estimating the term…
Abstract
The invention relates to piperidine-based compounds of formula (I) that are used to improve UV, thermal, and thermo-oxidative stability of high performance aromatic polymers in a blend or as end-cappers of the same polymers.
Claims16
An end-capper stabilizer compound (EC) of the general structural formula (I):
- wherein:
- Rk is selected from the group consisting of —H, aliphatic groups, and alkoxy groups, and
- Rj groups are equal to or different from each other and from Rk and are independently selected from aliphatic groups, and
- Y is a monovalent group selected from a first group consisting of a halogen, a carboxylic ester, an acid halide, an anhydride, an amide, and a thioester or from a second group consisting of a hydroxyl, an amine, a carboxylic acid, a thiol, and any protected derivative thereof, and
- A is a divalent group of formula:
2 more elements
An end capped polymer (EP) comprising recurring units and at least two chain ends, wherein at least one of the chain ends comprises the general structural formula (V):
- wherein:
- Rk is selected from the group consisting of —H, aliphatic groups, and alkoxy groups, and
- Rj groups are equal to or different from each other and from Rk and are independently selected from aliphatic groups, and
- X is a divalent group selected from the group consisting of —O—, —(C═O)—NH—, —(C═O)—, —(C═O)—O—, —(C═O)—S—, —NH— and —S—, and
- A is a divalent group of formula:
2 more elements
Dependencies are inferred from the claim text.