Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By treating occluded solids
Patent
1982-07-16
1983-11-22
Foelak, Morton
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By treating occluded solids
2642091, 264344, 264561, 521 64, 521182, B29D 2704
Patent
active
044168390
ABSTRACT:
A wholly aromatic polyester composition comprising
(a) 100 parts by weight of a wholly aromatic polyester containing as a main component at least one compound selected from the group consisting of aromatic dicarboxylic acids, aromatic dihydroxy compounds and aromatic hydroxycarboxylic acids, and
(b) from 5 to 300 parts by weight of a low-molecular-weight compound being substantially non-reactive with the wholly aromatic polyester and having a boiling point of at least about 200.degree. C. under atmospheric pressure and a molecular weight of not more than 1,000.
The wholly aromatic polyester composition is produced advantageously by polycondensing in the molten state the polyester-forming starting mixture in the presence of the low-molecular-weight compound.
A film-like or fibrous article of a wholly aromatic polyester may be produced by extracting the low-molecular-weight compound from a film-like or fibrous article of the wholly aromatic polyester composition.
REFERENCES:
patent: 3957651 (1976-05-01), Kesting
Inata Hiroo
Matsumura Shunichi
Foelak Morton
Teijin Limited
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