Company Filing History:
2 out of 19 
1 out of 480 Years Active: 1977-1985
Title: Alberto Osti: Innovator in Composite Pigments and Dyestuffs
Introduction
Alberto Osti is a notable inventor based in Milan, Italy. He has made significant contributions to the field of composite pigments and dyestuffs, holding a total of 3 patents. His work focuses on the development of innovative materials that enhance color stability and application processes.
Latest Patents
One of Osti's latest patents is for "Photostable yellow composite pigments and process for their preparation." This invention describes organic-inorganic ternary composite pigments that consist of 70%-90% by weight of an inorganic binary titanium dioxide/aluminum hydrate component and 10%-30% by weight of a co-precipitated organic component. The organic dye in this composite contains at least one carboxylic and/or sulphonic acid function, which is crucial for its stability and performance. The pigments are produced through a co-precipitation process that involves acidifying an aqueous solution of the dye in sodium aluminate, in the presence of titanium dioxide, under controlled temperature and pH conditions.
Another significant patent by Osti is for the "Process for the preparation of 7-oxo-7H-dibenzo-[d e,h]-quinolin-2-ol." This compound serves as an intermediate in the preparation of dyestuffs. The process involves cycloisomerizing N-phenylacetyl phthalimide in an inert solvent with a Friedel-Crafts catalyst, leading to the formation of the novel compound O-(3-hydroxy-1-isoquinolinyl)-benzoic acid, which is then cyclized to produce the desired 7-oxo-7H-dibenzo-[d e,h]-quinolin-2-ol.
Career Highlights
Throughout his career, Alberto Osti has worked with prominent companies in the chemical industry, including Aziende Colori Nazionali Affini and Montedison. His experience in these organizations has allowed him to refine his expertise in pigment and dye technology.
Collaborations
Osti has collaborated with notable professionals in his field, including Francesco De Feo and Franco Gonzati. These partnerships have contributed to the advancement of his research and the successful development of his patented technologies.
Conclusion
Alberto Osti's innovative work in composite pigments and dyestuffs has made
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