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Ram B Gupta, Dennis J Jakiela: Non-yellowing part-tertiary-alkyl phenyl substituted triazine and pyrimidine ultraviolet light absorbers. Cytec Technology, Pennie & Edmonds, January 21, 2003: US06509399 (7 worldwide citation)

This invention relates generally to para-tertiary alkyl phenyl substituted pyrimidines and triazines and the use thereof to protect against degradation by environmental forces, inclusive of ultraviolet light, actinic radiation, oxidation, moisture, atmospheric pollutants and combinations thereof. Th ...


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Ram B Gupta, Dennis J Jakiela: Non-yellowing para-tertiary-alkyl phenyl substituted triazine and pyrimidine ultraviolet light absorbers. Cytec Technology Corporation, Pennie & Edmonds, May 29, 2001: US06239276 (5 worldwide citation)

This invention relates generally to para-tertiary alkyl phenyl substituted pyrimidines and triazines and the use thereof to protect against degradation by environmental forces, inclusive of ultraviolet light, actinic radiation, oxidation, moisture, atmospheric pollutants and combinations thereof. Th ...


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Ram B Gupta, Dennis J Jakiela, Sampath Venimadhavan, Russell C Cappadona, Venkatrao K Pai: Process for making triazine UV absorbers using Lewis acids and reaction promoters. Cytec Technology, James A Jubinsky, Fran Wasserman, Claire M Schultz, November 26, 2002: US06486316 (4 worldwide citation)

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 l ...


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Ram B Gupta, Dennis J Jakiela, Sampath Venimadhavan, Russell C Cappadona, Venkatrao K Pai: Process for making 2-(2-hydroxy-4-alkoxyphenyl)-4,6-bisaryl-1,3,5-triazines. Cytec Technology, Pennie & Edmonds, October 2, 2001: US06297378 (2 worldwide citation)

The invention relates to a novel process for making 2-(2-hydroxy-4-alkoxyphenyl)-4,6-bisaryl-1,3,5-triazine and 2-(2,4-dialkoxyphenyl)-4,6-bisaryl-1,3,5-triazine compounds directly from 2-chloro-4,6-bisaryl-1,3,5-triazine compounds with 3-alkoxyphenol, 1,3-dialkoxylbenzene compounds or mixtures ther ...


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Ram B Gupta, Dennis J Jakiela, Sampath Venimadhavan, Russell C Cappadona, Venkatrao K Pai: Process for making triazine UV absorbers using lewis acids and reaction promoters. Cytec Technology, Fran Wasserman, Claire M Schultz, May 31, 2005: US06900314 (1 worldwide citation)

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 l ...


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Ram B Gupta, Dennis J Jakiela, Robert G Fischer: Benzocycle-substituted triazine and pyrimidine ultraviolet light absorbers. Cytec Technology Corporation, Pennie & Edmonds, October 2, 2001: US06297377

This invention relates generally to benzocycle-substituted pyrimidines and triazines and the use thereof to protect against degradation by environmental forces, inclusive of ultraviolet light, actinic radiation, oxidation, moisture, atmospheric pollutants and combinations thereof. The new class of b ...


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Ram B Gupta, Dennis J Jakiela, Robert G Fischer: Benzocycle-substituted triazine and pyrimidine ultraviolet light absorbers. Cytec Technology, James A Jubinsky, Claire M Schultz, Valerie T Didamo, May 7, 2002: US06384113

This invention relates generally to a new class of benzocycle-substituted pyrimidines and triazines and the use thereof to protect coatings, polymers and organic compounds against degradation by environmental forces, inclusive of ultraviolet light, actinic radiation, oxidation, moisture, atmospheric ...


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Ram B Gupta, Dennis J Jakiela, Sampath Venimadhavan, Russell C Cappadona, Venkatrao K Pai: Process for making triazine UV absorbers using lewis acids and reaction promoters. Cytec Technology, James A Jubinsky, Claire M Schultz, Fran Wasserman, May 4, 2004: US06730785

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 l ...


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Ram B Gupta, Dennis J Jakiela, Sampath Venimadhavan, Russell C Cappadona, Venkatrao K Pai: Process for making triazine UV absorbers using Lewis acids and reaction promoters. Cytec Technology, James A Jubinsky, Fran Wasserman, Claire M Schultz, March 23, 2004: US06710177

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 l ...