Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1997-09-25
1999-08-24
Barts, Samuel
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
560193, 560198, C07C 6700, C07C 6952
Patent
active
059426420
ABSTRACT:
The invention relates to a method for making oligomers, including homo-oligomers and cooligomers, by the free radical polymerization of at least one monomer component B) having a greater tendency to polymerize and 0-90 wt. %, calculated on the oligomers, of a monomer component A) having a lesser tendency to polymerize, at an elevated temperature and in the presence of a polymerization initiator in a conventional polymerization vessel, by adding monomer component B) to monomer component A), or to a solution of monomer component A), or merely to a solvent, so that the mol ratio of B) to A), if A) is present, passes through values of 0 to about 0.2 during the initial phase of the polymerization and takes the value 0.2 to 20 during the terminal phase of the polymerization, the reaction temperature being in a region in which a homopolymer of the monomer component B) is already significantly depolymerized, and the initiator, which has a half-life time at the reaction temperature from 1 minute to about 5 hours, being added throughout the duration of the polymerization in an amount from 0.1 to 10 percent of the total weight of the monomers.
REFERENCES:
patent: 3968148 (1976-07-01), Leister et al.
patent: 4009195 (1977-02-01), Leister et al.
patent: 4419106 (1983-12-01), Miller
patent: 4526950 (1985-07-01), Grava
Encyclopedia of Polymer Science and Engineering, vol. 4, third edition, edited by J. Brandrup and E. H. Immergut, "Copolymerization" and "Depolymerization", 1989, pp. 223-225 and 719-745.
H. F. Mark et al., Encyclopedia of Polymer Science and Engineering, vol. 4, John Wiley & Sons, NewYork, pp. 223-225.
H. F. Mark et al., Encyclopedia of Polymer Science and Engineering, vol. 4, John Wiley & Sons, New York 1986, title page and frontispiece.
Brandrup and Immergut, Polymer Handbood, 3rd Edition, John Wiley & Sons, New York, 1989, title page and frontispiece.
Beyer Claudia
Pennewiss Horst
Barts Samuel
Keys Rosalynd
Roehm GmbH Chemische Fabrik
LandOfFree
Method for making oligomers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for making oligomers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for making oligomers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-468023