2-(2-hydroxy-3-.alpha. cumyl-5-tert nonyl or dodecyl phenyl)-2H- Benzotriazole UV Absorbers

• US 5,607,987 A
• Filed: 04/05/1996
• Issued: 03/04/1997
• Est. Priority Date: 04/19/1995
• Status: Expired due to Term

• Current Assignee: CIBA Specialty Chemicals
• Original Assignee: Ciba-Geigy Corporation (Novartis Ag)
• Inventors: Babiarz, Joseph E., Ravichandran, Ramanathan, Holt, Mark S., Winter, Roland A. E., von Ahn, Volker H., Leppard, David G.
• Primary Examiner(s): Hoke, Veronica P.
• Application Number:
  US08/628,433
• Time in Patent Office: 333 Days
• Field of Search: 524/91
• US Class Current: 524/91
• CPC Class Codes: B41M 5/46 characterised by the light-to-heat converting means; characterised by the heat or radiation filtering or absorbing means or layers
• CPC Class Codes: B41M 5/5227 characterised by organic non-macromolecular additives, e.g. UV-absorbers, plasticisers, surfactants
• CPC Class Codes: C07D 249/20 with aryl radicals directly attached in position 2
• CPC Class Codes: C08K 5/3475 condensed with carbocyclic rings
• CPC Class Codes: C09D 11/38 characterised by non-macromolecular additives other than solvents, pigments or dyes
• CPC Class Codes: G03C 1/815 characterised by means for filtering or absorbing ultraviolet light, e.g. optical bleaching for photoprinting G03C5/10; for intensifying X-ray images G03C5/17
• CPC Class Codes: G03C 1/8155 Organic compounds therefor
• CPC Class Codes: G03F 7/031 Organic compounds not covered by group G03F7/029

Abstract

Soluble and thermally stable benzotriazole UV absorbers typified by those of formula I ##STR1## where R₁ is hydrogen or chloro, R₂ is alkyl or --CH₂ CH₂ COOR₄ where R₄ is hydrogen, alkyl or alkyl substituted with hydroxyl, and R₃ is α-cumyl, provide excellent light stability protection to electro coat, base coat or clear coat finishes. The new soluble, crystalline form of 2-(2-hydroxy-3-α-cumyl-5-tert-octylphenyl)-2H-benzotriazole is particularly effective.

Claims

1. A composition stabilized against the deleterious effects of actinic light which comprises

(a) an organic material subject to the deleterious effects of actinic light, and

(b) an effective stabilizing mount of a soluble benzotriazole UV absorber which is 2-(2-hydroxy-3-α

-cumyl-5-nonylphenyl)-2H-benzotriazole or 2-(2-hydroxy-3-α

-cumyl 5-dodecylphenyl)- 2H-benzotriazole.