Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1998-01-28
1999-12-21
Hampton-Hightower, P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528357, 528361, 525408, 525413, 525415, C08G 6308
Patent
active
060050675
ABSTRACT:
A process for the continuous production of polylactide polymers from lactic acid which incorporates removal of water or a solvent carrier to concentrate the lactic acid feed followed by polymerization to a low-molecular-weight prepolymer. This prepolymer is fed to a reactor in which a catalyst is added to facilitate generation of lactide, the depolymerization product of polylactic acid. The lactide generated is continuously fed to a distillation system as a liquid or vapor wherein water and other impurities are removed. The resultant purified liquid lactide is fed directly to a polymerization process.
REFERENCES:
patent: 1095205 (1914-05-01), Gruter et al.
patent: 1849107 (1932-03-01), Moss
patent: 1995970 (1935-04-01), Dorough
patent: 2396994 (1946-03-01), Filachione et al.
patent: 2703316 (1955-03-01), Schneider
patent: 2758987 (1956-08-01), Salzberg
patent: 2951828 (1960-09-01), Zeile et al.
patent: 3268487 (1966-08-01), Klootwijk
patent: 3322791 (1967-05-01), Selman
patent: 3531561 (1970-09-01), Trehu
patent: 3636956 (1972-01-01), Schneider
patent: 3772420 (1973-11-01), Glick et al.
patent: 3773919 (1973-11-01), Boswell et al.
patent: 3839297 (1974-10-01), Wassermann et al.
patent: 3887699 (1975-06-01), Yolles
patent: 3912692 (1975-10-01), Casey et al.
patent: 4045418 (1977-08-01), Sinclair
patent: 4249531 (1981-02-01), Heller et al.
patent: 4273920 (1981-06-01), Nevin
patent: 4279249 (1981-07-01), Vert et al.
patent: 4595713 (1986-06-01), St. John
patent: 4643734 (1987-02-01), Lin
patent: 4677191 (1987-06-01), Tanaka et al.
patent: 4683288 (1987-07-01), Tanaka et al.
patent: 4719246 (1988-01-01), Murdoch et al.
patent: 4727163 (1988-02-01), Bellis
patent: 4728721 (1988-03-01), Yamamoto et al.
patent: 4766182 (1988-08-01), Murdoch et al.
patent: 4789726 (1988-12-01), Hutchinson
patent: 4797468 (1989-01-01), DeVries
patent: 4800219 (1989-01-01), Murdoch et al.
patent: 4835293 (1989-05-01), Bhatia
patent: 4902515 (1990-02-01), Loomis et al.
patent: 4950258 (1990-08-01), Kawai et al.
patent: 4960866 (1990-10-01), Bendix et al.
patent: 4966982 (1990-10-01), Ono et al.
patent: 4981696 (1991-01-01), Loomis et al.
patent: 4983745 (1991-01-01), Muller et al.
patent: 4990222 (1991-02-01), Aigner et al.
patent: 5011946 (1991-04-01), Hess et al.
patent: 5023349 (1991-06-01), Bhatia
patent: 5023350 (1991-06-01), Bhatia
patent: 5028667 (1991-07-01), McLain et al.
patent: 5041529 (1991-08-01), Shinoda et al.
patent: 5043458 (1991-08-01), Bhatia
patent: 5053485 (1991-10-01), Nieuwenhuis et al.
patent: 5053522 (1991-10-01), Muller
patent: 5076983 (1991-12-01), Loomis et al.
patent: 5097005 (1992-03-01), Tietz
patent: 5108399 (1992-04-01), Eitenmuller et al.
patent: 5132397 (1992-07-01), DeGuia
patent: 5134171 (1992-07-01), Hammel et al.
patent: 5136017 (1992-08-01), Kharas et al.
patent: 5136057 (1992-08-01), Bhatia
patent: 5142023 (1992-08-01), Gruber et al.
patent: 5149833 (1992-09-01), Hess et al.
patent: 5180765 (1993-01-01), Sinclair
patent: 5210296 (1993-05-01), Cockrem et al.
patent: 5229528 (1993-07-01), Brake et al.
patent: 5236560 (1993-08-01), Drysdale
patent: 5247058 (1993-09-01), Gruber et al.
patent: 5247059 (1993-09-01), Gruber et al.
patent: 5258488 (1993-11-01), Gruber et al.
patent: 5274073 (1993-12-01), Gruber et al.
patent: 5288881 (1994-02-01), Drysdale et al.
"Argus Product Data, Argus Dimyristyl Thiodipropionate", Argus Division, Witco Corporation, 633 Court Street, Brooklyn, NY 11231-2193 (pub. on or before Aug. 1992).
"Argus Product Data Argus.RTM. Distear Thiodipropionate", Argus Division, Witco Corporation, 633 Court Street, Brooklyn, NY 11231-2193 (pub. on or before Aug. 1992).
"Argus Product Data, Mark.RTM. 2140 Pentaerythrityl Octylthiopropionate", Argus Division, Witco Corporation, 633 Court Street, Brooklyn, NY 11231-2193 (pub. on or before Aug. 1992).
"Argus Product Data, Seenox.RTM. 412S Pentaerythritol Tetrakas (B-Laurylthiopropionate", Argus Division, Witco Corporation, 633 Court Street, Brooklyn, NY 11231-2193 (pub. on or before Aug. 1992).
"Argus Thiochemical Product Data, Argus.RTM. Dilauryl Thiodipropionate", Argus Division, Witco Corporation, 633 Court Street, Brooklyn, NY 11231-2193 (pub. on or before Aug. 1992).
"Biocompatible Composite Would Be Completely Absorbed in the Body", Advanced Materials, 12(15):6 (Aug. 1990).
"Ethanox.RTM. 398 Antioxidant, The First Fluorophosphonite Antioxidant", Ethyl Corporation, 451 Florida Blvd., Baton Rouge, LA 70801 (pub. on or before Oct. 1990).
"GE Specialty Chemicals Product Guide CA-4001E", General Electric Company, 5th and Avery Street, Parkersburg, WV 26102 (1989) The Month in the Date of Publication is not Available.
"Hydrolytic Stability/Corrosivity of Phosphite Costabilizers", Technical Bulletin 89-04, Stars Laboratory, Additives Division, Ciba-Geigy Corporation, Ardsley, NY 10502 (1989) The Month in the Date of Publication is not Available.
"Irganox.RTM. 1010", product brochure, Ciba-Geigy Corporation, Three Skyline Drive, Hawthorne, NY 10532 (pub. on or before Aug. 1992).
"Irganox.RTM. 1076 Antioxidant and Thermal Stabilizer", Ciba-Geigy Corporation, Three Skyline Drive, Hawthorne, NY 10532 (1986) The Month in the Date of Publication is not Available.
"Irganox.RTM. B-Blends Antioxidants and Process Stabilizers for Polymers", Ciba-Geigy Corporation, Three Skyline Drive, Hawthorne, NY 10532 (Mar. 1990).
"Irganox.RTM. MD 1024, Metal Deactivator/Antioxidant", Ciba-Geigy Corporation, Three Skyline Drive, Hawthorne, NY 10532 (pub. prior to Aug. 1992).
"Naugard.RTM. 445, Specialty Chemicals", product brochure, Uniroyal Chemical Company, Inc., Middlebury, CT 06749 (pub. on or before May 1, 1990).
"Naugard.RTM. XL-1 Specialty Chemicals", product brochure, Uniroyal Chemical Co., Inc., Middlebury, CT 06749 (Feb. 1992).
"Polylactides Exhibit Degradability", Tappi Journal, p. 42 (Sep. 1991).
"The Resomer.RTM. Resorbable Polyesters", Boehringer Ingelheim KG, D-6507 Ingelheim, W. Germany (pub. on or before Feb. 1991).
"Tinuvin.RTM. 123 Hindered Aminoether Light Stabilizer for Coatings", Ciba-Geigy Corporation, Three Skyline Drive, Hawthorne, NY 10532 (1989) The Month in the Date of Publication is not Available.
"Tinuvin.RTM. 622LD Low Dust, Hindered Amine Light Stabilizer for Polymers FDA-Cleared for Polyolefins", Ciba-Geigy Corporation, Three Skyline Drive, Hawthorne, NY 10532 (pub. prior to Aug. 1992).
Anderson, L., "An Injectable Sustained Release Fertility Control System", Contraception, 13(3):375-384 (1976) The Month in the Date of Publication is not Available.
Bonsignore, P. et al., "Poly(lactic acid) Degradable Plastics, Coatings, and Binders", TAPPI Proceedings (Nonwovens Conference), pp. 129-140 (1992) The Month in the Date of Publication is not Available.
Carothers, W. et al., "Studies of Polymerization and Ring Formation. X. The Reversible Polymerization of Six-Membered Cyclic Esters", American Chemical Society Journal, 54:761-772 (1932) The Month in the Date of Publication is not Available.
Chabot, F. et al., "Configurational Structures of Lac tic Acid Stereocopolymers as Determined by .sup.13 C(.sup.1 H) N.M.R.", Polymer, 24:53-59 (1983) The Month in the Date of Publication is not Available.
Chawla, A. et al., "In-Vivo Degradation of Poly(lactic acid) of Different Molecular Weights", Biomat., Med. Dev., Art. Org., 13:153-162 (1985) The Month in the Date of Publication is not Available.
Chemical Abstracts, 71(22): see p. 21, col. 2, abstract No. 102446h and JP, B 69015789, Research Institute for Production Development, Columbus, OH (Dec. 1, 1969).
Deane, D. et al., "Coagulation of Milk for Cheese-Making by Ester Hydrolysis", Journal of Dairy Science, 43:1421-1429 (1960) The Month in the Date of Publication is not Available.
Enlow, W., "Process Stabilization with Phosphite Antioxidants", lecture notes distributed at a seminar entitled: Principles of Polymer Degradation and Stabilization in Orlando, Florida, Oct. 28-30, 1991, sponsored by the Institute of Materials Science, State University of New York at New Paltz.
EP, A, 0261572 (Boehringer Ingelheim KG), see claims 1-6 and USA 5053522 (Mar. 30, 1988).
Benson Richard Douglas
Borchardt Ronald Leo
Gruber Patrick Richard
Hall Eric Stanley
Iwen Matthew Lee
Cargill Incorporated
Hampton-Hightower P.
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