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:
Dec. 12, 1989
Filed:
Jul. 17, 1987
Applicant:
Inventors:
Carlo Neri, San Donato Milanese, IT;
Nereo Nodari, Spino D'Adda, IT;
Giovanni Sandre, San Danato Milanese, IT;
Assignee:
Enichem Sintesi S.p.A., Palermo, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560 75 ;
Abstract
Tetrakis[3,5-di-tert.butyl-4-hydroxyphenyl)-propionyl-oxymethyl]methane with amorphous structure, with glass transition temperature T.sub.g comprised within the range of from about 40.degree. C. to 50.degree. C. and free from endothermic melting peaks at temperatures higher than 50.degree. C. and of up to 200.degree. C. is obtained by means of the melting of crystalline tetrakis[3-(3,5-di-tert.butyl-4-hydroxyphenul)-propionyl-oxymethyl]methane and sudden cooling of the molten material.