Thermotropic polymer/inorganic reinforcing filler molding compositions
US4994518A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1989 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Jul 13, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K7/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Molding compositions, easily shaped into useful articles having improved mechanical properties that are less anisotropic, contain (a) a thermotropic polymer, and (b) an inorganic filler material, such inorganic filler (b) being a crystalline inorganic filler of platelet shape having a mean diameter ranging from 0.5 to 400 .mu.m and a shape factor represented by the ratio: ##EQU1## which ranges from 10 to 90, and such inorganic filler (b) being present in an amount, expressed in % by weight of filler in the combined polymer+filler, ranging from 20% to to 60%, with the proviso that such amount ranges from above 50% to 60% when the mean particle diameter of the filler material is less than 20 .mu.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.