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6706854 |
Process for preparing reabsorbable polyesters by mass polymerization
The invention relates to a process for preparing reabsorbable polyesters by bulk polymerisation, wherein the reaction components are melted and homogenised in a stirred reactor, the reaction...
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6667385 |
Method of producing aminium lactate salt as a feedstock for dilactic acid or dimer production
Polylactic acid is produced from dimers of lactic acid in an energy saving manner by contacting a lactic acid source via an extraction membrane with an amine carrier solvent to extract lactic acid...
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6660825 |
Lactone polyester diol, polyurethane obtained therefrom, and spandex filament thereof
The present invention can provide a lactone polyester diol at least containing ε-caprolactone and a dibasic acid as constructing component units, and a polyurethane obtained using the diol and an...
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6649732 |
Aliphatic polyester film and gas barrier film
A film of the present invention includes, as its main component, an aliphatic polyester whose primary repeating unit is represented by a general formula —O—CHR—CO— (where R denotes H or an...
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6646103 |
Method for obtaining oxacarbonyl polymers, functionalization, resulting polymers and functionalizing agent
The invention concerns a method for obtaining oxacarbonyl polymers comprising steps which consist in: providing at least monomers comprising at least a cyclic oxacarbonyl function, an initiator,...
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6642346 |
Coating compositions containing substituted and unsubstituted exomethylene lactone or lactam monomers
This invention is directed to a coating composition used for original equipment manufacturing or refinishing uses in the automotive industry, which coating composition utilizes an acrylic polymer...
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6632891 |
Flame-retardant resin, composition thereof, and process for producing the same
A flame-retardant resin composition comprising a phosphazene flame retardant and a polyester resin, wherein the flame retardant is bonded to the molecules of the polyester resin via the ester group...
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6630543 |
Method of making biodegradable polymer compositions
A method of making a biodegradable polymer composition including the steps of providing a first component being either one of a thermoplastic poly(hydroxy ester ether) or a synthetic,...
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6616944 |
Self-assembling colloidal carriers for protein delivery
The invention is directed to self-assembling, polymer-based delivery systems for proteins. The delivery systems comprises an active agent and a polyol ester of the invention, having a linear polyol...
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6608170 |
Syndiotactic poly(lactic acid)
Syndiotactic poly(lactic acid) is formed by polymerization involving a cleavage of the same oxygen-acyl bond in a series of meso-lactide molecules to form polymer containing a series of units with...
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6602975 |
Photopolymerizable biodegradable hydrogels as tissue contacting materials and controlled-release carriers
Hydrogels of polymerized and crosslinked macromers comprising hydrophilic oligomers having biodegradable monomeric or oligomeric extensions, which biodegradable extensions are terminated on free...
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6600007 |
Preparation of bromine-containing hydroxy-functional copolymers
A bromine-containing, hydroxy-functional copolymer is prepared from an initiator that is solid at room temperature and has at least one bromone atom. The initiator is reacted with an effective...
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6592895 |
Biodegradable polyhydric alcohol esters
Precursor polyhydric alcohol esters where acyl moieties originate from aliphatic homopolymer or copolymer polyesters and contain free hydroxyl at their terminal ends, are reacted to provide...
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6590059 |
Bioerodible polyorthoesters from dioxolane-based diketene acetals
Bioerodible polyorthoesters useful as orthopedic implants or vehicles for the sustained delivery of pharmaceutical, cosmetic and agricultural agents contain hydrogen bonding groups and α-hydroxy...
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6569528 |
Amphiphilic biodegradable block copolymers and self-assembled polymer aggregates formed from the same in aqueous milieu
There are provided amphiphilic biodegradable block copolymers comprising polyethylenimine (PEI) as a hydrophilic block and aliphatic polyesters as a hydrophobic block, which can form various size...
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6569990 |
Plastic 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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6569989 |
Process for producing lactide and process for producing polylactic acid from fermented lactic acid employed as starting material
According to the present invention, a process for consistently producing lactide from ammonium lactate obtained by lactic fermentation, and a process for consistently producing polylactic acid from...
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6559275 |
Method for producing aliphatic polyester
The invention relates to a method for producing an aliphatic polyester, utilizing starch as a raw material. The invention produces an aliphatic polyester by the steps of hydrolyzing starch to...
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6552162 |
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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6551610 |
Multifaceted compositions for post-surgical adhesion prevention
This invention deals with an absorbable, gel-forming composition for multifaceted prevention of post-operative surgical adhesion through a plurality of physico-pharmacological modes, comprising a...
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6541601 |
Unsaturated side chain polyamide polymers
Polyamide polymers with side chains from a polyamide backbone, preferably containing carbon to carbon unsaturation which provides unique conductive and color change properties, are described. In...
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6538101 |
Preparing isotactic stereoblock poly(lactic acid)
A stereospecific poly(lactic acid) is isotactic poly(lactic acid) having a number average molecular weight ranging from 10,000 to 200,000 grams per mole, with, on average, an equal number of poly...
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6531566 |
Polyoxyalkylenepolyols and process for producing ring-opened polymer
A polyoxyalkylene polyol or monool (I) of the general formula (1) below, in which not less than 40% of the terminally located hydroxyl-containing groups, namely —AO—H groups, are primary...
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6509440 |
ALIPHATIC COPOLYMER, PRODUCTION PROCESS, ALIPHATIC POLYESTER RESIN COMPOSITION, VARIOUS USES, COATING COMPOSITION, AND AGRICULTURAL OR HORTICULTURAL PARTICULATE COMPOSITION COMPRISING DEGRADABLE COATING FILM
In the present invention, there are obtained aliphatic polyesters having a controlled thermal decomposing property, hydrolizability, and biodegradability, in which OH terminals and COOH terminals...
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6506873 |
Degradable polymer fibers; preparation product; and, methods of use
The present invention relates to a fibrous material which includes a plurality of polylactide containing fibers. The plurality of polylactide containing fibers can be considered low shrinkage or...
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6500193 |
Sutures
The invention relates to a suture comprising a copolymer of a polyethylene glycol terephtalate and a polybutylene terephtalate, which copolymer comprises 45-60 wt. %, based on the weight of the...
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6498229 |
Direct synthesis of segmented glycolide copolymers and crystalline materials therefrom
The present invention is directed to a method for the direct, one-step synthesis of crystalline segmented glycolide copolymers having less than 80 percent glycolide-based sequences in the...
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6494898 |
Absorbable copolymers and surgical articles fabricated therefrom
A synthetic absorbable monofilament comprising glycolide and epsilon caprolactone is provided. The monofilament exhibits physical characteristics equivalent to or superior than gut sutures. The...
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6492147 |
Method for producing microbial polyester
A method for producing a microbial polyester by culturing a microorganism being capable of producing a poly hydroxyalkanoate polyester in a culture medium containing 1-hexene as a sole carbon source.
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6486295 |
Lipase-catalyzed transesterifications to regulate copolymer structure
A method to regulate copolymer structure using lipase catalyzed transesterification reactions, by selecting a first reactant from the group consisting of polymers and monomers, selecting a second...
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6486296 |
Lactide-containing polymer and medical material
A medical material which contains a lactide-containing polymer having weight-average molecular weight lower than 400000 as determined by GPC and has a lactide content of 4000 ppm or lower.
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6476156 |
Biodegradable triblock copolymers and process for their preparation
The present invention relates to polyethyleneglycol/polylactide(or polyglycolide or polycaprolactone)/polyethyleneglycol triblock copolymers with an enhanced reactivity, and process for their...
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6472502 |
Absorbable copolylactides and their use
The invention relates to novel copolylactides which have been polymerized from units of racemic lactide and the comonomers ε-caprolactone, δ-valerolactone, 1,4-dioxan-2-one or 1,3-dioxan-2-one in...
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6469132 |
Diblock copolymer and use thereof in a micellar drug delivery system
The present invention relates to diblock copolymers and more particularly to polycaprolactone-b-polyethylene oxide (PCL-b-PEO) diblock copolymers used in micellar systems, for delivering a...
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6469133 |
Process for the preparation of polymers of dimeric cyclic esters
The present invention provides a process for the direct synthesis of high melting polymers made from dimeric cyclic esters. In particular, the present invention provides a process for synthesis of...
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6448367 |
Method of producing poly(p-dioxanone), poly (p-dioxanone) monofilaments and method for producing the same
The ring opening polymerization of p-dioxanone is started in a liquid phase under stirring at a temperature of 85 to 105° C. after adding 0.002 to 0.005 mol percent of stannous 2-ethylhexanoate...
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6433130 |
Process for preparing polymer by using copper compound
The present inventors has its objects to provide a polymerization catalyst component, a copper compound which can easily be synthesized and is stable. The present invention is related to a method...
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6429280 |
Process for preparing polyhydroxycarboxylic acid
A process for preparing a polyhydroxycarboxylic acid having a weight average molecular weight of 50,000 to 1,000,000, which comprises a crystallizing step comprising (A) a step of heating pellets...
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6420513 |
Aliphatic polyester, method for manufacturing aliphatic polyester, and method for recycling cellulose
An aliphatic polyester is provided which is manufactured by a process comprising a step of hydrolyzing cellulose so as to form D-glucose, a step of forming gluconolactone represented by the formula...
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6420048 |
High molecular weight copolyesters from macrocyclic oligoesters and cyclic esters
High molecular weight copolyesters have been prepared from macrocyclic oligoesters and cyclic esters in the presence of a transesterification catalyst. The invention generally features a method of...
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6413539 |
Hydrogel-forming, self-solvating absorbable polyester copolymers, and methods for use thereof
The present invention provides novel hydrogel-forming, self-solvating, absorbable polyester copolymers capable of selective, segmental association into compliant hydrogels upon contacting an...
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6403758 |
Bioresorbable compositions for implantable prostheses
Crosslinked compositions formed from a water-insoluble copolymer are disclosed. These compositions are copolymers having a bioresorbable region, a hydrophilic region and at least two crosslinkable...
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6376643 |
Method of polymerization of lactide and polylactide homopolymer thereof
This invention relates to a method of polymerization of lactide or glycolide (GA) monomers and in particular to a method of polymerizing one type of the monomers or two types of the monomers using...
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6355772 |
Melt-stable lactide polymer nonwoven fabric and process for manufacture thereof
A nonwoven fabric 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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6353086 |
Lactic acid residue containing polymer composition and product having improved stability, and method for preparation and use thereof
The invention relates to a lactic acid residue containing polymer composition and product having improved stability and to methods for the preparation and use thereof. The lactic acid residue...
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6350812 |
Hydrogels containing triblock copolymers, and preparation and use thereof
A soft hydrogel containing a triblock copolymer and water is disclosed. The copolymer has formula (I): X-G-Y, wherein G is a non-hydroxylated hydrophilic linear polymer block containing p...
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6348564 |
Cyclic esterketone compounds, processes for the synthesis thereof and process for the preparation of poly (esterketone) polymers
Unsubstituted oxepane-diones useful as monomers for the production of polymers, process for the synthesis thereof by oxidation of unsubstituted cyclohexanediones, process for the preparation of...
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6346599 |
Biodegradable lactone copolymers
Lactone copolymers are disclosed which are polymerized from a first lactone monomer and a second amorphous monomer which is effective to suppress the crystallization of the copolymer. It is...
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6340580 |
Methods for purifying polyhydroxy alkanoates
A method is provided for isolating and purifying PHA from microbial or plant biomass that contains PHA. The method includes the step of extracting PHA from the biomass using at least one solvent...
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6326459 |
Process of polymerization by opening oxygenated rings, using a catalytic composition based on a grafted metal oxide
The invention relates to a composition based on a grafted metal oxide, its preparation and its use in a process of polymerization by opening oxygenated rings such as alkyl oxides, cyclic esters or...
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