Colored polyethylene terephthalate moulding compound and moulded

Details Colored polyethylene terephthalate moulding compound and moulded Colored polyethylene terephthalate moulding compound and moulded

1982-03-19

1983-07-19

Bleutge, John C.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 58, 524732, C08K 515

Patent

active

043944701

ABSTRACT:
A polyethylene terephthalate moulding composition is disclosed having uniformly dispersed therein 10-25,000 ppm of caramel as a colorant. The colorant is non-toxic, does not affect the transparency of the polyester, and does not cause aldehyde formation. The caramel may have been formed in situ from a mono- or disaccharide which has been added to the bis(beta-hydroxyethyl)terephthalate before or during polycondensation or to the molten polyester. The color may have been intensified by adding an alkaline reacting compound. The composition may moreover contain further colorants. The composition is particularly suitable for use in the manufacture of food containers such as boxes, trays and bottles.

REFERENCES:
patent: 2841499 (1958-07-01), Grossi
patent: 3639312 (1972-02-01), Turner
patent: 4107105 (1978-08-01), Korf
patent: 4138271 (1979-02-01), Ohira

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