Viscosity-modified lactide polymer composition and process for m

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

525437, 525444, 524 81, 524127, 524284, 528361, 528354, C08G 6308

Patent

active

059985526

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 et al.
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.
patent: 5525671 (1996-06-01), Ebato et al.
patent: 5525706 (1996-06-01), Gruber et al.
patent: 5539081 (1996-07-01), Gruber et al.
patent: 5543494 (1996-08-01), Perego et al.
patent: 5594095 (1997-01-01), Gruber et al.
patent: 5798435 (1998-08-01), Gruber et al.
Bruin et al., "Design and Synthesis of Biodegradable Poly(ester-urethane) Elastomer Networks Composed of Non-toxic Building Blocks", Markomol. Chem., Rapid. Commun., 9:589-594 (1988).
Grijpma et al., "Star-shaped Polyactide-containing Block Copolymers", Markomol. Chem., Rapid Commun., 14:155-161 (1993).
Kim et al., "Multifunctional Initiation of Lactide Polymerization by Stannous Octoate/Pentaerythritol", Macromol. Chem., 193:1623-1631 (1992).
Manaresi et al., "Synthesis and Characterization of Linear and Star-Branched Poly(.epsilon.-caprolactone)", La Chimica & L'Industria, 72:131-134 (1990).
Pitt et al., "The Synthesis of Biodegradable Polymers with Functional Side Chains", J. Polymer Science: Part A: Polymer Chemistry, 25:955-966 (1987).
Schaefgen et al., "Synthesis of Multichain Polymers and Investigation of their Viscosities", J. Am. Chem., 70, 2709-=2718 (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 (1982).
Storey et al., "Degradable Polyurethane Networks Bsed on D,L-lactide, glycolide, .epsilon.-caprolactone and Trimethylene Carbonate Homopolyester and Copolyester Triols", Polymer, 35:830-838 (1994).
Tian et al., "Macromolecular Engineering of Polylactones and Polylactides. 18. Synthesis of Star-Branched Alipatic Polyesters Bearing Various Functional End Groups", Macromolecules, 27:4134-4144 (1994).
Grijpma et al., "Poly(L-lactide) crosslinked with spiro-bis-dimethylene-carbonate", Mcromol. Chem. Phys. 195, p1633-1647 (1994).
Grijpma et al., "(Co)polymers of L-lactide, 1 Synthesis, thermal properties and hydrolytic degradation", Polymer 34: 1496-1503 (1993).
A. Sodergard & J.H. Nasman, "Stabilization of poly(l-lactide) in the melt", Dept. of Polymer Technology, Abo Akademi University, Porthansgatan 3-5, 20500 Turku, Finland (1994).
Anders Sodergarrd et al., "Changes in Peroxide Melt-Modified Poly(L-lactide)", Ind. Eng. Chem. Res. 34:1203-1207 (1995).
International Search Report for PCT/US94/08508.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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.

Rate now

     

Profile ID: LFUS-PAI-O-825071

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.