Compression moldable aromatic polyamide powder
US4716215A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1986 |
| Grant date | Dec 29, 1987 |
| Priority date | — |
| Expiry date | Feb 10, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/919
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A new type of aromatic polyamide powder including a large number of fine coalescible paticles which have an average size of from 0.1 to 10 .mu.m, which include at least one aromatic amide polymer including 40 to 100 molar % of recurring m-phenylene isophthalamide units and 0 to 60 molar % of at least one other type of additional recurring aromatic amide units, for example, m-phenylene terephthalamide units, and which coalesce with each other to form porous agglomeraters having an average size of from 10 to 400 .mu.m and a surface area of from 1 to 20 m.sup.2 /g, and can be compression molded, optionally in mixture with a reinforcing additive, for example, aromatic polyamide fibers having a length of 3 mm or less, at a temperature of 200.degree. to 400.degree. C. under a pressure of 300 to 1000 kg/cm.sup.2 for 20 minutes to 5 hours, to produce shaped articles having excellent mechanical properties and appearance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.