Process for the mass coloration or whitening of linear polyester

Details Process for the mass coloration or whitening of linear polyester Process for the mass coloration or whitening of linear polyester

1975-12-10

1978-06-06

Person, Sandra M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 4221, 260873, C08K 904

Patent

active

040935841

ABSTRACT:
A process for the mass coloration or whitening of linear polyesters, wherein the polyester to be colored is mixed, in the solid or fused state, with a preparation consisting substantially of a colorant or fluorescent brightener which is soluble or insoluble in the polyester, and of a polystyrene with a softening point above 100.degree. C, and the resultant mixture, provided it is not already in the form of a melt, is converted into the molten state and formed into shaped articles. Evenly and deeply colored polyesters are obtained.

REFERENCES:
patent: 2380126 (1945-07-01), Sturm
patent: 2571319 (1951-10-01), Waters et al.
patent: 3133893 (1964-05-01), Newman
patent: 3322854 (1967-05-01), Yasui et al.
patent: 3359344 (1967-12-01), Fukushima
patent: 3642686 (1972-02-01), Zwahlen et al.
patent: 3694402 (1972-09-01), Essam

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