Flame-retardant filled polypropylene compound with improved flow properties
US4390653A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1982 |
| Grant date | Jun 28, 1983 |
| Priority date | — |
| Expiry date | Jan 22, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S260/24
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved flame-retardant thermoplastic compound based upon a surface modified alumina hydrate composition containing powdered alumina hydrate, a liquid mixture of C.sub.10 -C.sub.20 carboxylic acids and a solid mixture of C.sub.14 -C.sub.20 carboxylic acids. A preferred solid mixture comprises stearic acid and palmitic acid. Thermoplastic compounds made with polypropylene and an alumina hydrate composition containing isostearic acid together with the solid fatty acid mixture of the invention exhibit an increased melt index and reduced molding pressure compared with polypropylene compounds made with isostearic acid coated alumina hydrate and no solid fatty acid mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.