Resumes
Resumes
Abraham Reife Phones & Addresses
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60 Oakside Dr, Toms River, NJ 08755 (732) 349-3230
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60 Oakside Dr, Toms River, NJ 08755
Publications
Us Patents
Environmentally Friendly Method For Producing Lightfast Black Shades On Natural And Synthetic Substrates
View pageUS Patent:
53761510, Dec 27, 1994
Filed:
Apr 16, 1993
Appl. No.:
8/049031
Inventors:
Harold S. Freeman - Raleigh NC
Abraham Reife - Toms River NJ
Abraham Reife - Toms River NJ
Assignee:
North Carolina State University - Raleigh NC
International Classification:
C09B 4500
C09B 4514
C09B 4514
US Classification:
8685
Abstract:
Disclosed is an original approach to solving the environmental problem associated with the use of Cr-based metallized azo dyes to deliver black shades on natural and synthetic substrates. This invention affords methods for both the synthesis of metallized dyes and the generation of black dyeings using those dyes without employing metals designated as priority pollutants at any stage in either method. The key element of the disclosure is the use of black 1:2 Fe complexes of azo dyes in lieu of currently used Cr-based complexes which are based on environmentally unfriendly priority pollutant metals without compromising the desirable high fastness properties of the latter complexes, an accomplishment heretofore assumed unachievable.
Iron-Complexed Formazan Dyes For Polyamide And Protein Substrates
View pageUS Patent:
56774346, Oct 14, 1997
Filed:
May 31, 1996
Appl. No.:
8/656638
Inventors:
Harold S. Freeman - Raleigh NC
Abraham Reife - Toms River NJ
Abraham Reife - Toms River NJ
Assignee:
North Carolina State University - Raleigh NC
International Classification:
C09B 5610
C09B 62018
C09B 62038
C09B 62018
C09B 62038
US Classification:
534652
Abstract:
A family of 1:2 Fe-complexed formazan dyes is described. The dyes unexpectedly afford reddish-violet, violet, blue and black shades on natural and synthetic substrates. Methods for synthesizing the dyes and for dyeing a substrate are described. The dyes represent environmentally friendly alternatives to conventional Cr- and Co-based azo and formazan dyes.