Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1988-04-01
1988-12-20
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 53, 521 61, 521182, 528272, 528503, C08J 928, G08G 6302
Patent
active
047925736
ABSTRACT:
There is a growing demand for high molecular weight polyester resin. For instance, the market for high molecular weight polyethylene terephthalate resin is rapidly expanding. High molecular polyethylene terephthalate resin is currently being used in vast quantities in manufacturing bottles for carbonated beverages, trays for frozen foods which can be heated in either microwave ovens or convection ovens, and in tire cord. There is a growing trend toward higher molecular weights in many applications for such polyester resins. Unfortunately, it becomes progressively more difficult and expensive to produce polyester resins having higher and higher molecular weight utilizing standard commerical polymerization techniques. This invention discloses a technique by which polyester resin having extremely high molecular weight can be prepared utilizing a very rapid solid state polymerization process. This invention more specifically discloses a process for preparing ultra-high molecular weight polyester resin which comprises: (1) dissolving a polyester prepolymer in a suitable organic solvent; (2) recovering the polyester prepolymer from the organic solvent to produce a porous, fibrous mass of the polyester prepolymer; and (3) solid state polymerizing the porous, fibrous mass at an elevated temperature to produce the ultra-high molecular weight polyester resin.
REFERENCES:
patent: 3586647 (1971-06-01), Kremer
patent: 4416839 (1983-11-01), Matsumura et al.
patent: 4419308 (1983-12-01), Matsumura et al.
patent: 4517315 (1985-05-01), Matsumura et al.
patent: 4613664 (1986-09-01), Tate et al.
patent: 4742151 (1988-05-01), Tate et al.
patent: 4755587 (1988-07-01), Rinehart
Foelak Morton
Rockhill Alvin T
The Goodyear Tire & Rubber Company
LandOfFree
Preparation of ultra-high molecular weight polyester does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Preparation of ultra-high molecular weight polyester, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of ultra-high molecular weight polyester will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1909803