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:
Sep. 18, 1990
Filed:
Feb. 11, 1988
Carlo Neri, San Donato Milanese, IT;
Nereo Nodari, Spino D'Adda, IT;
Erik Bersanetti, Milan, IT;
Giovanni Sandre, San Donato Milanese, IT;
Enichem Synthesis S.p.A., Palermo, IT;
Abstract
A solid stabilizer composition for organic polymers is formed by a solid, continuous phase and by a dispersed phase in said continuous phase, wherein the continuous phase is constituted by amorphous tetrakis-[3-(3,5-di-tert.-butyl-4-hydroxyphenyl)-propionyloxymethyl]-metha ne and the dispersed phase is constituted by an either amorphous or crystalline organic phosphite, in the form of particles with a particle size of from 10 .mu.m to 2 mm, with the weight ratio of said continuous phase to said dispersed phase being comprised within the range of from 9:1 to 1:9. The processes for preparing said solid stabilizer composition and its use in the stabilization of organic polymers are disclosed.