Bisbenzotriazoleureas as UV stabilizers for polymers

Details Bisbenzotriazoleureas as UV stabilizers for polymers Bisbenzotriazoleureas as UV stabilizers for polymers

1989-05-05

1992-01-14

Shah, Mukund J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546261, 524 91, C07D24920, C08H 548

Patent

active

050812580

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-phenylisocyanate) with 2-[2-hydroxy-3-(1,1-dimethylethyl)-5-(N-aminoethyl)propionamid-phenyl]-2H- benzotriazole.

REFERENCES:
patent: 3248398 (1966-05-01), Muhlbauer
patent: 3357978 (1967-12-01), Thominet
patent: 4002733 (1977-01-01), Degen et al.
patent: 4560694 (1985-12-01), Oeckl et al.
Cooper, Spectroscopic Techniques for Organic Chemists (Wiley & Sons, New York, 1980) pp. 240 to 243.
Mar., "Adv. Org. Chem." 2nd Ed. (McGraw-Hill Book Co.) p. 827 (1977).

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