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4994551 |
Bioabsorbable co-polydepsipeptide
Novel, semi-crystalline depsipeptide polymers and copolymers particularly suitable for use in fabricating bioabsorbable medical implant devices such as sutures or clips and obtained through...
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4994074 |
Copolymers of ε-caprolactone, glycolide and glycolic acid for suture coatings
Copolymer of a predominant amount of ε-caprolactone, the balance being glycolide and glycolic acid. Coating for an absorbable, multifilament surgical suture prepared by dissolving the copolymer in...
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4983689 |
Process for making macromolecular monomers of polylactones with terminal acryloyl unsaturation and block copolymers thereof
Preparation of a macromolecular monomer of a lactone having an alpha-beta monoolefinically unsaturated "head" is effected at low temperature with a strong oxonium salt, such as a trialkyloxonium...
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4983745 |
Meso-lactide, processes for preparing it and polymers and copolymers produced therefrom
The invention relates to a meso-lactide having a melting point of 52.8° C., processes for its preparation, and its use in the preparation of resorbable polymers and copolymers.
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4975517 |
Polyamide from optically active, anti head-to-head coumarin dimer
A racemic, anti head-to-head coumarin dimer can be separated into its optically active constituents by using an optically active amine. Each optically active isomer can be further reacted with a...
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4965300 |
Sequential copolymers based on cyclic carbonates and esters
Polymers having a sequential structure of the following formula --A--X--B] r (I) with r=1 to 20, in which --A-- is a polymer of a cyclic carbonate,...
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4959447 |
Copoly(imidine-imide)
A copoly(imidine-imide) consisting of a copolymer of polyimidines and polyimides having, in the basic chain structure of the polymer, imidine structures represented by formula (I) and the imide...
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4950735 |
Biodegradable polyamides
Biodegradable polyamides, useful as absorable sutures and as controlled release binder materials, are prepared by condensing 4,4'-spirobibutyrolactone with a primary diamine, optionally in the...
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4943610 |
Non-shrinking, dimensionally-stable modified epoxy resins
A non-shrinking, strain-free, dimensionally-stable modified epoxy resin is disclosed for use in the fabrication of composite, structural laminates. The uniqueness of product preparation is that the...
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4933430 |
Process for producing polymers useful in thermoset coatings and polymer so produced
A polymerization process to produce polyol polymer useful in the formulation of thermoset coatings, including the polymer so produced, is disclosed. The polymers are characterized as having at...
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4921934 |
Alkali-soluble polymers and process for producing same
A process for producing an alkali-soluble graft polymer is disclosed. The graft polymer has at least one main chain and a plurality of side chains attached thereto. The process comprises combining...
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4918153 |
Copoly(imidine-amide)
The present invention relates to a copoly(imidineamide) consisting of a copolymer of polyamidines and polyimides having, in the basic chain structure of the polymer, imidine structures represented...
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4916209 |
Bioabsorbable polydepsipeptide, preparation and use thereof
Novel, semi-crystalline depsipeptide polymers and copolymers particularly suitable for use in fabricating bioabsorbable medical implant devices such as sutures or clips and obtained through...
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4891263 |
Polycarbonate random copolymer-based fiber compositions and method of melt-spinning same and device
This invention is directed to novel random copolymers and implantable devices fabricated therefrom.
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4889119 |
Surgical fastener made from glycolide-rich polymer blends
There is described a surgical fastener comprising a glycolide-rich blend of two or more polymers, one polymer being a high lactide content polymer and another being a high glycolide content...
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4882168 |
Polyesters containing alkylene oxide blocks as drug delivery systems
The invention is a slow release drug delivery system comprising a drug and an ABA or AB block copolymer wherein one block (B) is a poly(alkylene oxide) and the other blocks (A) are comprised of...
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4849228 |
Polymer, production and use thereof
The present invention provides a biodegradable high molecular polymer characterized in that the content of water-soluble low molecular compounds, as calculated on the assumption that said compounds...
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4845181 |
Organic condensation polymers and method of making same
An organic condensation polymer made by reacting in solution of first compound having at least two anionic carbon sites bonded to each other either directly or through a chain of 1 to 30 carbon...
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4841016 |
Polyester resin compositions
An additive composition for enhancing curing and color clarity properties of polyester resins. The additive comprises from about 50 to 75 parts by weight of a mercaptan, and from about 50 to about...
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4838267 |
Glycolide/p-dioxanone block copolymers
Block copolymers of glycolide and p-dioxanone are produced by reacting poly(p-dioxanone) that is substantially free of p-dioxanone monomer with glycolide.
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4829105 |
Electrodeposition coating composition containing modified epoxy resin having chargeable groups
An anodic electrodeposition composition containing a water-soluble or water-dispersible modified epoxy resin derived from an epoxy resin having two epoxide groups and at least one alcoholic hydroxy...
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4814361 |
Blends of epoxides and monoepoxides
Described herein are compositions suitable for photocopolymerization comprising (a) an epoxide containing two or more epoxy groups, and (b) a hydroxyl substituted cycloaliphatic monoepoxide. The...
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4812488 |
Photocopolymerizable compositions based on hydroxyl-containing organic materials and substituted cycloaliphatic monoepoxide reactive diluents
This invention is directed to photocopolymerizable compositions comprising a poly (active hydrogen) organic compound, a photoinitiator and, as a reactive diluent, a substituted cycloaliphatic...
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4800219 |
Polylactide compositions
Novel polylactide composition containing segments or poly(R-lactide) interlocked with segments of poly(S-lactide).
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4798883 |
Modified polyethylene naphthalate
Polyethylene naphthalate is a polyester resin that is highly useful in numerous applications. For instance, polyethylene naphthalate can be molded into a wide variety of products which have...
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4797468 |
Preparation of polylactic acid and copolymers of lactic acids
The invention relates to a method for preparing high molecular polylactic acid or copolymers of lactic acids using lactide that is purified by extraction with water.
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4791929 |
Bioabsorbable coating for a surgical article
A bioabsorbable coating for a surgical article comprises a copolymer manufactured from the monomer caprolactone and at least one other copolymerizable monomer. The surgical article can be a...
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4791189 |
Terminally unsaturated macromolecular monomers of polylactones and copolymers thereof
Preparation of a macromolecular monomer of a lactone allows the preparation of copolymers of lactones with commonly available olefinically unsaturated monomers. There is no known method for the...
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4789726 |
Manufacture of polyesters
A process for the manufacture of polyesters, especially polylactides or poly(lactide-co-glycolide) of specified low-medium molecular weight, by controlled hydrolysis of a higher molecular weight...
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4750910 |
Indigo blue-colored bioabsorbable surgical fibers and production process thereof
Blue-colored bioabsorbable surgical fibers are obtained by adding and dispersing a bioabsorbable polymer, which is selected from polyglycolic acid, poly(l-lactic acid) and glycolic acid-l-lactic...
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4745171 |
Poly-ε-caprolactone resin and method for retarding hydrolysis rate thereof
A poly-ε-caprolactone resin having an enhanced stability to hydrolysis is obtained by ring-opening polymerization of ε-caprolactone with 0.01 to 5.0% by weight, based on the ε-caprolactone, of...
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4738899 |
Transparent abrasion-resistant flexible polymeric coating
A process for preparing an adhesive, transparent, corrosion and abrasion resistant polymeric coating on a substrate, such as a glass, plastic or metal such as aluminum or steel. The substrate is...
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4732943 |
Dental restorative material
An adhesive for attaching polymeric or polymerizable restorative materials to dentine or other tooth structure, which comprises a polymer of (a) a condensate of ε-caprolactone with one or more...
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4716964 |
Use of degradable ball sealers to seal casing perforations in well treatment fluid diversion
Plugging perforations in casing in a wellbore penetrating a subterranean formation using degradale ball sealers. The ball sealer used is composed of a polyester polymer which is substantially...
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4705820 |
Surgical suture coating
A surgical suture coating comprising a random copolymer is disclosed. The copolymer has about 25 to 75 weight percent of glycolic acid ester linkages. The remaining linkages comprise at least...
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4701483 |
Lactone-modified hydroxyethyl (meth) acrylate solution
A lactone-modified hydroxyethyl (meth)acrylate solution comprising 30 to 95 parts by weight of a lactone-modified hydroxyethyl (meth)acrylate represented by the formula (I): ##STR1## wherein R is...
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4699974 |
Method of preparing copolyester carbonate from cyclic aromatic polycarbonate oligomer and lactone
Cyclic polycarbonate oligomer compositions are polymerized with lactones in the presence of a catalyst for the polymerization of either. Usually, the lactone is first polymerized at a lower...
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4686274 |
Process for preparing modified poly(alkylene carbonate) polyahls
A process for modifying a poly(alkylene carbonate) polyahl, which comprises reacting the poly(alkylene carbonate) polyahl, with at least one modifier having at least one active hydrogen moiety or...
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4683287 |
Compositions containing a reactive monomer derived from a lactone
Described herein are compositions containing a reactive monomer derived from the reaction product of a hydroxyalkyl acrylate or methacrylate and a lactone. These compositions can be reacted with...
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4683288 |
Polymer and its production
A polymer or copolymer of lactic acid and/or glycolic acid which has a weight-average molecular weight of not less than about 5,000 and a dispersity of about 1.5 to 2 is advantageously used as a...
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4677190 |
Synthesis and ring-opening polymerization of bicyclic lactones containing a tetrahydropyran ring
The synthesis of novel strained bicyclic lactones and their ring-opening polymerization to high molecular weight polyester polymers is disclosed.
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4677191 |
Copolymer and method for producing the same
A copolymer of lactic acid and glycolic acid which has a weight-average molecular weight of not less than about 5000 and a dispersity of about 1.5 to 2 is advantageously used as a biodegradable...
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4653497 |
Crystalline p-dioxanone/glycolide copolymers and surgical devices made therefrom
Copolymers are made by reacting glycolide with a mixture of p-dioxanone monomer and homopolymer. The copolymers are useful in making surgical devices such as surgical sutures.
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4652605 |
Preparation of low molecular weight polymers by vinyl addition polymerization under dilute reaction conditions using a polymeric diluent
A polymeric reaction product, a process for its preparation and a coating composition containing the reaction product as a binder are described. The polymeric reaction product is prepared by the...
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4650851 |
Purification of glycolide
A process for the purification of glycolide which comprises dissolving the glycolide to be purified in a suitable organic solvent, adding alumina to the resulting solution to form a slurry wherein...
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4645664 |
Microporous powder form polylactides
A microporous powder form polylactide which can take up a multiple of its own weight of active material and which can be used for the controlled release of that active material. The aforesaid...
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4644038 |
Unsaturated poly (alpha-hydroxy acid) copolymers
An unsaturated poly (alpha-hydroxy acid) copolymer is prepared by reacting a cyclic diester of an alpha-hydroxy acid having 2 to 5 carbon atoms with an ethylenically-unsaturated epoxide. The...
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4643191 |
Crystalline copolymers of p-dioxanone and lactide and surgical devices made therefrom
A crystalline copolymer is produced by first polymerizing p-dioxanone to form a mixture of monomer and homopolymer, and then adding lactide to this mixture and polymerizing to form a copolymer.
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4643734 |
Lactide/caprolactone polymer, method of making the same, composites thereof, and prostheses produced therefrom
A bio-absorbable copolymer of lactide and epsilon caprolactone comprising a major amount of epsilon caprolactone and a minor amount of lactide; a method of making the same; a composition of said...
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4639286 |
Curable compositions containing azlactone-functional compounds
Azlactone-functional compounds, which are liquid above 20° C., and their method of preparation from alkenyl azlactones and nucleophilic group-substituted compounds are disclosed. The...
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