The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2005
Filed:
Apr. 30, 2004
Ram B. Gupta, Stamford, CT (US);
Dennis J. Jakiela, Orange, CT (US);
Sampath Venimadhavan, Stamford, CT (US);
Russell C. Cappadona, Norwalk, CT (US);
Venkatrao K. Pai, Stamford, CT (US);
Ram B. Gupta, Stamford, CT (US);
Dennis J. Jakiela, Orange, CT (US);
Sampath Venimadhavan, Stamford, CT (US);
Russell C. Cappadona, Norwalk, CT (US);
Venkatrao K. Pai, Stamford, CT (US);
Cytec Technology Corp., Wilmington, DE (US);
Abstract
It has been now surprisingly discovered after extensive research that 2-halo-4,6-bisaryl-1,3,5-triazine can be prepared with unprecedented selectivity, efficiency, mild conditions, and in high yield by the reaction of cyanuric halide with aromatics in the presence of at least one Lewis acid and at least one reaction promoter. This reaction is also unprecedently general as a variety of aromatics can be used to produce a wide selection of 2-halo-4,6-bisaryl-1,3,5-triazines. The novel approach includes the use of the reaction promoters in combination with at least one Lewis acid under certain reaction conditions to promote the formation of 2-halo-4,6-bisaryl-1,3,5-triazine compounds from cyanuric halide. Preferably, the Lewis acids and reaction promoters are combined to form a complex. 2-Halo-4,6-bisaryl-1,3,5-triazines are key intermediates for making 2-(2-oxyaryl)-4,6-bisaryl-1,3,5-triazine class of UV absorbers.