Novel polyester for the packaging of comestibles

Details Novel polyester for the packaging of comestibles Novel polyester for the packaging of comestibles

1981-05-19

1982-07-20

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

528274, 528285, 528302, C08G 6302

Patent

active

043407218

ABSTRACT:
Novel polyester for the packaging of perishable comestibles, e.g., as bottles for still or carbonated mineral waters, is a poly(ethylene glycol)terephthalate (PET) having an intrinsic viscosity ranging from 0.65 to 1.05 dl/g and a density of more than 1.38, comprising 92.5 to 98.5% of ethylene terephthalate recurring units and 1.5 to 7.5 mol % of recurring units of at least one polybasic acid and/or polyhydric alcohol comonomeric crystallization retardant, the di- and/or triethylene glycol content thereof being less than about 3.5 mol % per mol of diacid radicals present in the polymer chain, said PET also having a residual acetaldehyde concentration of less than 1.25 ppm, with acetaldehyde being reformed therefrom at a rate of less than 5 ppm/hour, at 220.degree. C., and said PET being devoid of visible crystallization in an at least 4 mm thick test plate shaped in a mold cavity from a melt thereof.

REFERENCES:
patent: 4049631 (1977-09-01), Go
patent: 4154920 (1979-05-01), Jabarin
patent: 4225549 (1980-09-01), Allan
patent: 4230819 (1980-10-01), Hauenstein et al.
patent: 4256860 (1981-03-01), Davis et al.

Affiliated with

Also associated with

Rating

Novel polyester for the packaging of comestibles does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Novel polyester for the packaging of comestibles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Novel polyester for the packaging of comestibles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-250930