Polyester and optical brightener blend having improved propertie

Details Polyester and optical brightener blend having improved propertie Polyester and optical brightener blend having improved propertie

1998-06-15

1999-11-16

Acquah, Samuel A.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

528272, 528298, 528302, 528307, 528308, 5283086, 525420, 525425, 525432, 525437, 524 81, 524 86, 524 88, 524155, B29D 2200, C08F28304

Patent

active

059853891

ABSTRACT:
The present invention is a compositional blend having a polyester, an acetaldehyde reduction compound and less than 50 ppm of an optical brightener. The blend has utility for food and beverage molded containers where improved clarity and flavor retention are important without producing a haze. The acetaldehyde reduction compound can be a low molecular weight partially aromatic polyamide, a low molecular weight aliphatic polyamides or polyesteramide. The optical brightener preferably is a bis(benzoxazolyl) stilbene. Articles, and especially beverage containers, produced from the blend have a yellowness, b*, less than about 2.5.

REFERENCES:
patent: 5194319 (1993-03-01), Onaka et al.

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