Colored polyester containing copolymerized dyes as colorants
AssigneeEastman Kodak Company
InventorsThomas G. Davis, Max A. Weaver
Life of this patent
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Abstract
Disclosed are colored polyester compositions containing copolymerized anthraquinone dyes as colorants, which compositions may be used, for example, for food packaging and to mold colored beverage bottles. The copolymerized dyes are thermally stable at the processing temperatures, and are colorfast and nonextractable. The useful dyes have the general formula: ##STR1## wherein either or both of rings A and B may contain in any position thereon one or two groups of the formula ##STR2## R and R.sup.3 each is hydrogen, lower alkyl or lower hydroxyalkyl; R.sup.1, R.sup.2, R.sup.4 and R.sup.5 each is hydrogen or 1-3 substituents such as lower alkyl, lower alkoxy, phenyl, Cl, Br, or the like; X is --S-- or --NH--; n is 1 or 2; m is 0, 1, or 2.
Claims7
Colored polyester composition comprising a linear thermoplastic or unsaturated cross-linkable polyester containing a coloring amount of a dye component comprising the copolymerized residue of one or more dyes of the formula ##STR12## wherein either or both of rings A and B may contain in any position thereon one or two groups of the formula ##STR13## R and R.sup.3 each is hydrogen, lower alkyl or hydroxy substituted lower alkyl;
- R.sup.1, R.sup.2, R.sup.4 and R.sup.5 each represents hydrogen or 1-3 substituents selected from lower alkyl, lower alkyl substituted with lower alkoxy, phenyl, Cl, Br, or lower alkanoylamino, lower alkoxy, lower alkoxy substituted with lower alkoxy, phenyl, Cl, Br, or lower alkanoylamino, chlorine, bromine, amino, lower alkylamino, lower alkylamino substituted with lower alkoxy, cyclohexyl, phenyl, Cl, Br, or lower alkanoylamino, arylamino, arylthio, aroylamino, lower alkylsulfonyl, lower alkylthio, lower alkanoylamino, and cyclohexylamino, wherein each aforesaid aryl moiety is 6-10 carbons;
- X is --S-- or --NH--;
- n is 1 or 2;
- m is 0, 1, or 2;
- and wherein from about 5 to about 200 parts of copper phthalocyanine is admixed therewith, said parts being per million parts of polyester.
Dependencies are inferred from the claim text.