Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1996-12-13
1997-12-02
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...
524779, 524783, 524784, 524785, 525437, 525439, 525466, C08F 2000
Patent
active
056937229
ABSTRACT:
A process is disclosed whereby a polymeric resin (containing ester and/or carbonate bonds) is readily converted into a resin having a modified molecular structure. Accordingly, a polycyclic carbonate (a monomer or oligomer) is transesterified with the polymer resin in the melt, preferably upon extrusion, optionally in the presence of a catalyst. Significantly, the cyclic carbonates are, by the inventive process, inserted into the structure of the polymer, effecting branching of the molecular structure, a branching which manifests itself in the modified properties of the resin.
REFERENCES:
patent: 4185009 (1980-01-01), Idel et al.
patent: 4605731 (1986-08-01), Evans et al.
patent: 5097008 (1992-03-01), Krabbenhoft et al.
patent: 5162459 (1992-11-01), Krabbenhoft et al.
patent: 5191038 (1993-03-01), Krabbenhoft et al.
patent: 5281669 (1994-01-01), Kambour et al.
Chemistry and Physics of Polycarbonate, by Hermann Schell Interscience Publishers John Wiley & Sons, Inc., (month unavailable) 1964, pp. 44-51.
Polycarbonates by William F. Christopher and Daniel W. Fox; Reinhold Publishing Corporation, New York, (month unavailable) 1962, pp. 13-15.
Porter et al in Polym. Eng. Sci.--Mid Jan. 1989, vol. 29, pp. 55-62.
Brunelle et al in Indain Journal of Technology, vol. 31, Apr.-Jun. 1993 pp. 234-246.
J. Amer. Chem. Soc. (month unavailable) 1990, 112, p. 2399.
Warren L. Nachlis in Polymer, vol. 36, No. 27, Aug. 1994, pp. 3643, 35 seq.
Kohler Burkhard
Kumpf Robert J.
Pielartzik Harald
Priddy, Jr. Duane B.
Acquah Samuel A.
Bayer Aktiengesellschaft
Bayer Corporation
Gil Joseph C.
Preis Aron
LandOfFree
Method for modifying the backbone of polymeric resins 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 modifying the backbone of polymeric resins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for modifying the backbone of polymeric resins will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-802166