Poly(meta-phenylene isophthalamide) powder and process

Details Poly(meta-phenylene isophthalamide) powder and process Poly(meta-phenylene isophthalamide) powder and process

1975-02-24

1976-06-22

Anderson, Harold D.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

260 78S, 260 78R, 264126, B29B 114

Patent

active

039652360

ABSTRACT:
A poly(meta-phenylene isophthalamide) powder is provided which is coalescible under the influence of pressure followed by heating at temperatures below its crystalline melting point to provide molded objects of a solid and homogeneous nature. A process for preparing coalescible powders of poly(meta-phenylene isophthalamide) also is provided wherein a solution of said polymer in a solvent such as DMAC is added to a precipitant such as water to provide a slurry which is filtered, followed by washing and drying the resulting filter cake to provide a crumb which is ground and screened through a sieve of 35 mesh size (U.S. Standard).

REFERENCES:
patent: 3228902 (1966-01-01), Beste
patent: 3286008 (1966-11-01), Power et al.
patent: 3287324 (1966-11-01), Sweeny

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