Bisurea light stabilizer for organic polymers

Details Bisurea light stabilizer for organic polymers Bisurea light stabilizer for organic polymers

1990-11-30

1992-11-24

Morgan, Kriellion S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C08K 534

Patent

active

051662345

ABSTRACT:
A hydroxyphenyl-benzotriazole bisurea UV light stabilizer for organic polymers and a process for making it are provided. The stabilizer is particularly useful for spandex polymer yarns that are subjected to solvent scouring. A preferred stabilizer of the invention is a bisurea formed by reacting methylene-bis(4-phenyl-isocyanate) with 2-[2-hydroxy-3-(1,1-dimethylethyl)-5-(N-aminoethyl)propionamid-phenyl ]-2H-benzotriazole.

REFERENCES:
patent: 4853471 (1989-08-01), Rody et al.
patent: 4894400 (1990-01-01), Haruna et al.
patent: 5032498 (1991-07-01), Rody et al.

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