Solid stabilizer composition for synthetic polymers
US4985481A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1989 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Sep 19, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/527
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A solid stabilizer composition for synthetic polymers is formed by a solid, continuous phase and by a solid dispersed phase in said continuous phase, wherein the continuous phase is constituted by amorphous 2,2'-oxamido-bis[ethyl-3-(3,5-di-tert.-butyl-4-hydroxyphenyl)-propionate] and the dispersed phase is constituted by an amorphous, or crystalline, or partially amorphous and partially crystalline organic phosphite, 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 process for preparing said solid composition and its use in the stabilization of synthetic polymers are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.