Process for obtaining granular forms of additives for organic polymers
US5844042A · kind A · utility
12Cited by
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5Claims
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Key dates
| Filing date | Sep 25, 1997 |
| Grant date | Dec 1, 1998 |
| Priority date | — |
| Expiry date | Sep 25, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/098
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Process for obtaining granular forms, from mixtures of powders of two or more additives for organic polymers, including extruding the mixture at a temperature of between about the melting point of the component with the lowest melting point and 140.degree. C., with the condition that, when the mixture consists of two additives, these are not tetrakis 3-(3,5-di-t-butyl-4-hydroxyphenyl) propionyloxymethyl!methane, either in an amorphous or crystalline form, and an antiacid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.