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US 7,442,732 B2Granted
Hindered amine light stabilizers comprising neoalkanediol phosphites
AssigneeCrompton Corporation
InventorsMichael E. Gelbin, Carloss L. Gray
Life of this patent
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Abstract
Disclosed herein are compounds of the structure: wherein R1, R2, R3, R4, R5, and R6 are independently selected alkyl groups, provided that R1 is different from R2. The compounds are useful as stabilizers for thermoplastic resins.
Claims17
A compound of the structure:
- wherein R3, R4, R5, and R6are independently selected alkyl groups, R1 is ethyl, R2 is butyl, and provided that said compound is a liquid at room temperature.
A stabilized composition comprising:
- (A) a thermoplastic resin, and
- (B) a stabilizing amount of:
- (1) a compound having the structure:
- wherein R3, R4, R5, and R6 are independently selected alkyl groups, R1 is ethyl, R2 is butyl, and provided that said compound is a liquid at room temperature and, optionally,
- (2) a co-stabilizer selected from the group consisting of phenolics, aromatic amines, hydroxylamines, alkylamine-N-oxides, lactones, and thioethers.
2 more elements
A method for stabilizing a thermoplastic resin comprising adding to said resin a stabilizing amount of a stabilizer having the structure:
- wherein R3, R4, R5, and R6 are independently selected alkyl groups, R1 is ethyl R2is butyl, and provided that said compound is a liquid at room temperature.
A method for the preparation of stabilizer having the structure:
- wherein R3, R4, R5, and R6 are independently selected alkyl groups, R1 is ethyl, R2 is butyl, and provided that said compound is a liquid at room temperature wherein the method comprises reacting a phosphorous trihalide with a tetraalkylpiperidinol and a 2-butyl-2-ethyl-1,3-propanediol.
Dependencies are inferred from the claim text.