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6326458 |
Continuous process for the manufacture of lactide and lactide polymers
A process for the continuous production of substantially purified lactide and lactide polymers from lactic acid or an ester of lactic acid including the steps of forming crude polylactic acid,...
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6323308 |
Aliphatic polyester film
An aliphatic polyester film comprising, as a main component, a polylactic acid having a reduced viscosity (ηsp/C) of not less than 0.50 dl/g and not more than 2.50 dl/g, wherein the film has a...
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6310220 |
Stabilizing polycarbonates
This invention relates to compositions comprising a polycarbonate, polyester or polyketone which is subject to oxidative, thermal and/or light-induced degradation, or their mixtures and blends, and...
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6297350 |
Process for the preparation of copolyesters
Copolyesters are prepared using cyclic esters or carbonates as monomers and a metallic salt of the formula Me 2 + X 2 as catalyst. Me 2 + represents Ca, Fe(II), Mg, Mn(II) or Zn, and X is an anion...
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6297349 |
Condensation copolymers having supressed crystallinity
Condensation copolymers are disclosed which are polymerized from a first monomer which is capable of polymerization by condensation polymerization, e.g., ring opening lactone polymerization, and a...
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6294646 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Water-responsive, biodegradable compositions and films and articles comprising a blend of polylactide and polyvinyl alcohol and methods for making the same
The present invention is a water-responsive blend of a polylactide and a polyvinyl alcohol. The present invention includes films and personal care articles comprising a blend of a polyvinyl alcohol...
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6291597 |
Viscosity-modified lactide polymer composition and process for manufacture thereof
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...
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6291073 |
Curable coating composition with improved stability
The present invention provides a curable coating composition that includes at least three components. The coating composition includes a component (a) having at least one carbamate group or urea...
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6291077 |
Lactone chain-extended phenolic polyester polyols
A lactone chain-extended polyester polyol of the present invention comprises the reaction product of a lactone and a previously chain-extended phenolic-based hydroxyl compound. The previously...
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6281154 |
Compounds having one group 13 element, bound with one mono- or di-anionic trident ligand, a method of preparation and application thereof as polymerization catalysts
Novel compounds having one group 13 element bound with one mono- or di-anionic tridentate ligand, a method of preparation thereof and use thereof as a copolymerization catalyst.
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6277951 |
Continuous process for manufacture of lactide polymers with controlled optical purity
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...
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6277927 |
Absorbable block copolymers and surgical articles fabricated therefrom
Block copolymers wherein the first block contains from about 20 to about 80 mole percent of repeating units derived from lactide randomly combined with from about 20 to 80 mole percent of repeating...
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6274527 |
Composition and method for catalysis using bentonites
Maghnia or Mostaganem bentonites, are activated by contacting the Maghnia or Mostaganem bentonite with an acid solution of selected concentration and then drying the Maghnia or Mostaganem bentonite...
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6268434 |
Biodegradable polylactide nonwovens with improved fluid management properties
A biodegradable nonwoven material having improved fluid management properties. The nonwoven material may be produced using thermoplastic compositions which comprise an unreacted mixture of a...
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6258382 |
Drug sustained-released biomaterial
The present invention offers biomaterials exhibiting excellent sustained-release property and degradation property such as that polypeptides or the like having a biological activity can be...
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6255445 |
Polymers having improved processability
Poly(lactones) are provided. The poly(lactones) are obtained by polymerization of a lactone with an initiator system comprising at least one polyfunctional initiator. The poly(lactones) have a...
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6248430 |
Lactic acid-based polymer laminated product and molded product
The present invention provides a lactic acid-based polymer laminated product which is little liable to leakage of lactide during molding or storage of the molded product and can degrade at a raised...
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6245437 |
Gas-barrier composite film
A composite gas barrier film having a layer structure comprises a thermoplastic resin film laminated on at least one side of a film formed from polyglycolic acid containing at least 60 wt. % of a...
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6235869 |
Absorbable polymers and surgical articles fabricated therefrom
Synthetic absorbable medical devices made totally or in part from a random polymer comprising glycolide, lactide, trimethylene carbonate, and caprolactone are provided. The polymer can be...
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6221977 |
Biodegradable aliphatic polyester grafted with polyether and a process for preparing the same
The present invention provides a process for preparing biodegradable aliphatic polyester grafted with polyether which comprises a step of ring opening polymerization of a hydrophilic monomer of...
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6214967 |
Process for the polymerization of lactide
A two-step process is described for the polymerization of lactide to polylactide, in which process in the first step polymerization is carried out to a conversion of at least 50% by weight, and in...
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6206908 |
Absorbable polymer and surgical articles fabricated therefrom
Absorbable copolymers are fabricated from the random polymerization of 1,4 dioxane-2-one and 1,3 dioxane-2-one monomers. The copolymers are useful in forming surgical articles, including both...
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6207792 |
Melt-stable amorphous lactide polymer film and process for manufacture thereof
An amorphous film comprised of a lactide polymer. The lactide polymer comprises a plurality of poly(lactide) polymer chains, residual lactide in concentration of less than about 2 percent and water...
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6201072 |
Biodegradable low molecular weight triblock poly(lactide-co- glycolide) polyethylene glycol copolymers having reverse thermal gelation properties
A water soluble, biodegradable ABA- or BAB-type tri-block polymer is disclosed that is made up of a major amount of a hydrophobic A polymer block made of a biodegradable polyester and a minor...
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6194539 |
Polylactone having amino groups, a process for the preparation thereof, a compound having amino group, a composition for coatings, a composition for printing inks
Disclosed are a novel polylactone having amino groups and to a process for the preparation thereof. The polylactone having amino groups of the present invention is excellent in color hue, and it...
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6191253 |
Polyether phosphates
A dispersant for aqueous mill-bases obtainable by reacting a polyethylene glycol with a molar excess of a hydroxycarboxylic acid containing from 4 to 17 carbon atoms or lactone thereof and/or with...
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6190773 |
Self-water dispersible particle made of biodegradable polyester and process for the preparation thereof
A self-water dispersible particle made of a biodegradable polyester and a process for the preparation of an aqueous dispersion of self-water dispersible particles made of a biodegradable polyester...
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6191236 |
Bioabsorbable suture and method of its manufacture
Block copolymers wherein one of the blocks is made from hard phase forming monomers and another of the blocks is made from soft phase forming monomers copolymerized with randomly intermingled units...
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6187901 |
Method for the removal and recovery of lactide from polylactide
The invention relates to a method for the removal of lactide from polylactide and recovery of lactide from a lactide-containing gas by cooling the hot lactide-containing gas, wherein a polymer melt...
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6174990 |
Films comprising biodegradable PHA copolymers
The present invention relates to biodegradable PHA copolymers comprising at least two randomly repeating monomer units. The present invention further relates to a plastic article comprising a...
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6172167 |
Copoly(ester-amides) and copoly(ester-urethanes)
The invention provide biodegradable copolymers of the copoly(ester-amide) or copoly(ester-urethane) type, which copolymers consist of building blocks with the general structure (I): [CB-VB] wherein...
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6160199 |
Absorbent articles comprising biodegradable PHA copolymers
The present invention relates to biodegradable PHA copolymers comprising at least two randomly repeating monomer units. The present invention further relates to a plastic article comprising a...
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6156429 |
Monomers with dilactone cycle, and corresponding polymers
The invention concerns monomers with dilactonic cycle and the corresponding polymers, their preparation, and materials containing these polymers. The monomers are of formula (IIIa) ##STR1## in...
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6150497 |
Method for the production of polyglycolic acid
A method for the production of polyglycolic acid polymer useful in the manufacture of sutures, meshes, gauzes, molded clips and like medical articles.
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6143863 |
Melt-stable lactide polymer composition and process for manufacture thereof
A lactide polymer composition combining compositional and purity limitations and catalyst optimization or addition of stabilizing agents resulting in a melt-stable polymer is disclosed. The...
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6140453 |
Polyurethane thermoplastic material and production process
The thermoplastic polyurethane material has the general formula I ##STR1## (1<f<500 1<f'<15 R and R'=alkyl or aryl) and X has formula II ##STR2## (2<n<140 1<(n'+n")<51). The...
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6136905 |
L-lactic acid polymer composition, molded product and film
A lactic acid polymer composition comprising formulating 100 parts by weight of a mixture consisting of 80-95% by weight of an L-lactic acid polymer having an L-lactic acid proportion of 75% or...
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6121410 |
Melt-stable semi-crystalline lactide polymer film and process for manufacture thereof
A semi-crystalline film comprised of a lactide polymer. The lactide polymer comprises a plurality of poly(lactide) polymer chains, residual lactide in concentration of less than about 5 percent and...
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6117928 |
Polylactide films
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6114496 |
Biodegradable resin composition and preparation process thereof
A process for preparing a biodegradable resin composition, comprising: providing a reaction mixture comprising at least one hydroxycarboxylic acid and, as a polymerization catalyst, a monoorganotin...
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6100346 |
Copolymers of polyoxaamides
The present invention describes a polyoxaamide copolymer and blends thereof that may be used to produce hydrogels, surgical devices such as catheters, molded devices, and the like. The polyoxaamide...
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6096855 |
Process for the preparation of polyhydroxy acids
The invention relates to a process for the polymerization or copolymerization of cyclic lactones of hydroxy acids by using as catalysts organometallic iron compounds containing iron salts or iron...
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6090910 |
Degradable monofilament and preparation process thereof
A degradable copolymer filament comprising an internal structure having the following separate phases: (a) a matrix phase comprised as a primary component of a polymer segment which exhibits a...
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6090908 |
Medical devices containing high inherent viscosity poly(p-dioxanone)
The present invention discloses polymers of poly(p-dioxanone having an inherent viscosity in the range of from 2.3 dL/g to about 8 dL/g, as determined at a concentration of 0.1 g/dL in...
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6077931 |
Biodegradable PHA copolymers
The present invention relates to biodegradable PHA copolymers comprising at least two randomly repeating monomer units. The present invention further relates to a plastic article comprising a...
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6077930 |
Preparation process of polymer
A preparation process of a polymer comprising conducting ring-opening polymerization of a 4- to 10-membered ring-opening polymerizable cyclic monomer in the presence of a phosphazenium salt of an...
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6075118 |
Water-responsive, biodegradable film compositions comprising polylactide and polyvinyl alcohol, and a method for making the films
The present invention is a water-responsive film. More particularly, the present invention is a film comprising a blend of a polyvinyl alcohol and a polylactide and a method of making such films....
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6068935 |
Thermoplastic polyester resin, and insulated wire, electrically insulated cable and heat-shrinkable tube each made with the resin
A thermoplastic polyester resin represented by general formula (1) or (2) which has a melt index of from 1 to 50. The polyester resin is excellent in flexibility, flame retardancy, and thermal...
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6068920 |
Random-block copolymer and monofilament thereof
A random-block copolymer having appropriate hydrolyzability, excellent flexibility and excellent mechanical strength, a monofilament thereof, and a process for producing the copolymer. The...
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6048947 |
Triblock terpolymer, its use for surgical suture material and process for its production
A triblock terpolymer with a structure ABA formed from a biodegradable hard segment A and a biodegradable soft segment B has as the soft segment a statistical terpolymer with a completely amorphous...
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