Process for the manufacture of fire resistant acrylic polymer ya

Details Process for the manufacture of fire resistant acrylic polymer ya Process for the manufacture of fire resistant acrylic polymer ya

1979-07-27

1981-05-05

Schofer, Joseph L.

Bleaching and dyeing; fluid treatment and chemical modification

Chemical modification of textiles or fibers or products thereof

525329, 525336, 525351, 81156, 525354, 260 308DS, D01F 1106, D01F 638, C08F22044

Patent

active

042656281

ABSTRACT:
A process for the preparation of fire retardant formed bodies such as yarns and films of acrylic polymers is disclosed. The process comprises subjecting the polymer to sulphuration and subjecting the sulphurated polymer to a basic treatment by means of an alkali metal hydroxide, such as sodium hydroxide, whereby the polymer molecule acquires a cyclic structure.

REFERENCES:
patent: 2563640 (1951-08-01), Brown
patent: 2563662 (1951-08-01), Rothrock
patent: 3736309 (1973-05-01), Gump et al.
patent: 3736310 (1973-05-01), Gump et al.
patent: 3820951 (1974-06-01), Di Edwards
patent: 3954947 (1976-05-01), Didchenko et al.
patent: 3998797 (1976-12-01), Branli et al.
patent: 4001382 (1977-01-01), Matsumura et al.
patent: 4031188 (1977-06-01), Kohler
55892Y/32 Derwent Abs. (DT2603-029), "Cyclizing of Pan Fibers by Alkaline Treatment", Aug. 4, 1977, FARH (Hoechst).

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