Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1997-11-19
1999-04-20
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
528272, 528274, 528275, 528298, 528302, 528307, 528308, 5283086, 525437, C08F 2000, C08G 6302
Patent
active
058958070
ABSTRACT:
A process for making a random polyalkylene terephthalate
aphthalate copolymer by synthesizing a bis-(hydroxyalkyl)-naphthalate composition under transesterification conditions, and subsequently combining the bis-(hydroxyalkyl)-naphthalate, a terephthalic acid, and an alkylene glycol under direct esterification conditions to form a random polyaklylene terephthalate
aphthalate copolymer. The preferred bis-(hydroxyalkyl)-naphthalate is bis-(2-hydroxyalkyl)-2,6-naphthalate, with bis-(2-hydroxyethyl)-2,6-naphthalate being the most preferred. Preferably, the bis-(hydroxyalkyl)-naphthalate is added at the initial stage of an acid-based polymer process, and polymerization is initiated or continued to produce a polyester copolymer. Alternatively, the bis-(hydroxyalkyl)-naphthalate is added to phthalate-based oligomers after the initial direct esterification stage, and polymerization is continued to produce a polyester copolymer.
REFERENCES:
patent: 4020049 (1977-04-01), Rinehart
patent: 5331082 (1994-07-01), Mossman et al.
patent: 5594092 (1997-01-01), Burkett et al.
Burkett Eugene John
Callander Douglas David
Galko Joseph
Sisson Edwin Andrew
Acquah Samuel A.
Shell Oil Company
LandOfFree
Process for manufacturing polyester copolymers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for manufacturing polyester copolymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for manufacturing polyester copolymers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2248264