Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1994-07-27
1997-01-14
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528357, 528361, 525413, 525415, C08G 6308
Patent
active
055940951
ABSTRACT:
A composition comprising a polylactide polymer with improved extensional viscosity and methods of making the same are disclosed. The polylactide polymer composition is prepared by providing in the composition polylactide polymer molecules which have been modified, relative to linear non-substituted polylactide, to provide increased molecular interaction among polylactide backbone chains in the composition. The preferred polylactide polymer composition has a number average molecular weight of at least about 10,000 (preferably at least 50,000) and a polydispersity of at least about 2.5. In addition, the polylactide polymer composition should have a neck-in ratio of less than about 0.8.
REFERENCES:
patent: 3072680 (1963-01-01), Starcher et al.
patent: 4175177 (1979-11-01), Potts
patent: 4195167 (1980-03-01), Knopf et al.
patent: 4379138 (1983-04-01), Pitt et al.
patent: 4644038 (1987-02-01), Protzman
patent: 5080665 (1992-01-01), Jarrett et al.
patent: 5142023 (1992-08-01), Gruber et al.
patent: 5180765 (1993-01-01), Sinclair
patent: 5216043 (1993-06-01), Sipinen et al.
patent: 5216050 (1993-06-01), Sinclair
patent: 5225521 (1993-07-01), Spinu
patent: 5247058 (1993-09-01), Gruber et al.
patent: 5247059 (1993-09-01), Gruber et al.
patent: 5252642 (1993-10-01), Sinclair et al.
patent: 5302694 (1994-04-01), Buchholz
patent: 5338822 (1994-08-01), Gruber et al.
patent: 5346966 (1994-09-01), Spinu
patent: 5359026 (1994-10-01), Gruber
patent: 5424346 (1995-06-01), Sinclair
patent: 5444113 (1995-08-01), Sinclair et al.
patent: 5475080 (1995-12-01), Gruber et al.
patent: 5484881 (1996-01-01), Gruber et al.
patent: 5502158 (1996-03-01), Sinclair et al.
A. Sodergard & J. H. Nasman, "Stabilization of poly(I-Lactide) in the melt", Dept. of Polymer Technology, Abo Akademi University, Porthansgatan 3-5, 20500 Turku, Finland (1994). The date of publication is not available.
Anders Sodergard, et al., "Changes in Peroxide Melt-Modified Poly(L-lactide)", Ind. Eng. Chem. Res. 34:1203-1207 (1995). The date of publication is not available.
Grijpma et al., Poly(L-lactide) crosslinked with spiro-bis-dimethylene-carbonate, Polymer 34(7) pp. 1496-1503, (1993). The month of publication is not available.
Grijpma et al., (Co)polymers of L-lactide, 1 Synthesis, thermal properties and hydrolytic degradation, Macromol. Chem. Phys. 195, pp. 1633-1647 (1994). The month of publication is not available.
Bruin et al., "Design and Synthesis of Biodegradable Poly(ester-urethane) Elastomer Networks Composed of Non-toxic Building Blocks", Makromol. Chem., Rapid Commun., 9:589-594 (Aug., 1988).
Grijpma et al., "Star-shaped Polylactide-containing Block Copolymers", Makromol. Chem., Rapid Commun., 14:155-161 (Mar., 1993).
Kim et al., "Multifunctional Initiation of Lactide Polymerization by Stannous Octoate/Pentaerythritol", Macromol. Chem., 193:1623-1631 (Jul., 1992).
Manaresi et al., "Synthesis and Characterization of Linear and Star-Branched Poly(.epsilon.-caprolactone)", La Chimica & L'Industria, 72:131-134 (Feb., 1990).
Pitt et al., "The Synthesis of Biodegradable Polymers with Functional Side Chains", J. Polymer Science: Part A: Polymer Chemistry, 25:955-966 (Apr., 1987).
Schaefgen et al., "Synthesis of Multichain Polymers and Investigation of their Viscosities", J. Am. Chem., 70, 2709-2718 (Aug., 1948).
Schindler et al., "Aliphatic Polyesters. III. Molecular Weight and Molecular Weight Distribution in Alcohol-Initiated Polymerizations of .epsilon.-Caprolactone", J. Polymer Science: Polymer Chemistry Edition, 20:319-326 (Feb., 1982).
Storey et al., "Degradable Polyurethane Networks Based on D,L-lactide, glycolide, .epsilon.-caprolactone, and Trimethylene Carbonate Homopolyester and Copolyester Triols", Polymer, 35:830-838 (Feb., 1994).
Tian et al., "Macromolecular Engineering of Polylactones and Polylactides. 18. Synthesis of Star-Branched Aliphatic Polyesters Bearing Various Functional End Groups", Macromolecules, 27:4134-4144 (Jul., 1994).
Brosch Andrea L.
Gruber Patrick R.
Hartmann Mark H.
Kolstad Jeffrey J.
Witzke David R.
Cargill Incorporated
Foelak Morton
Hampton-Hightower P.
LandOfFree
Viscosity-modified lactide polymer composition and process for m does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Viscosity-modified lactide polymer composition and process for m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Viscosity-modified lactide polymer composition and process for m will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1389086