Polyester compositions of low residual aldehyde content

Details Polyester compositions of low residual aldehyde content Polyester compositions of low residual aldehyde content

2005-07-12

2005-07-12

Roberston, Jeffrey B. (Department: 1712)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S166000

Reexamination Certificate

active

06916881

ABSTRACT:
A mixture of a polyester, such as poly(ethylene terephthalate) PET, and a second polymer which is polyacrylamide, polymethacrylamide or copolymer of acrylamide or methacrylamide when extrusion compounded exhibits a lower residual acetaldehyde content than does PET alone when similarly treated. The invention pertains to any polyester used in the manufacture of bottles or containers which in turn are used to store consumer materials, especially food, beverages and most especially water.

REFERENCES:
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patent: 2996475 (1961-08-01), Joyner et al.
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patent: 0826713 (1998-03-01), None
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patent: 98/07786 (1998-02-01), None
patent: 98/39388 (1998-09-01), None
Derwent Abstract 1978-38440A |22| for FR 2372199 (1978).

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