Production of aromatic sulfide/ketone polymers with separation a

Details Production of aromatic sulfide/ketone polymers with separation a Production of aromatic sulfide/ketone polymers with separation a

1990-05-22

1992-02-18

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From ketone or ketene reactant

528223, 528224, 528226, 528388, 528494, 528495, 528496, 528497, 528498, 528499, C08G 218, C08G 7516

Patent

active

050895966

ABSTRACT:
Aromatic sulfide/ketone polymer is prepared from dihaloaromatic ketone, alkali metal sulfide, water and a polar organic compound. The polymerization reaction mixture comprising the aromatic sulfide/ketone polymer is subjected to a heat soak at elevated temperature then a separation agent (non-solvent) is added under controlled conditions and subsequently cooled to provide a mixture comprising particulate aromatic sulfide/ketone polymer.
Biaxially-oriented film is made from recovered particles of aromatic sulfide/ketone polymer prepared as described by (1) washing the polymer particles with an aqueous calcium salt, (2) heating said washed particles to remove water, wherein the resulting heated particles are at least partially crystalline, (3) molding said heating particles to form a sheet of polymer, (4) biaxially stretching said sheet above the glass transition temperature of the polymer to form a film, and (5) heat-setting said biazially-oriented film under stretching tension for a time and at a temperature to increase strength properties and density.

REFERENCES:
patent: 3819582 (1974-06-01), Feasey
patent: 4286018 (1981-08-01), Asakura et al.
patent: 4461860 (1984-07-01), Vives
patent: 4540620 (1985-09-01), Johnson et al.
patent: 4588789 (1986-05-01), Scoggins et al.
patent: 4716212 (1987-12-01), Gaughan
patent: 4795799 (1989-01-01), Cleary
patent: 4812552 (1989-03-01), Cliffton et al.

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