摘要:
Lactam-lactone copolymers are provided that range in properties from plastic to elastomer which are formed by reacting components of a polymerizable composition comprising: a lactam monomer; a lactone monomer; a C.sub.3 to C.sub.12 lactam magnesium halide catalyst; and an initiator.
摘要:
Impact resistant polymer blends of crystallizable polyester, e.g. PET, and styrene copolymer graft rubber composition, e.g. ABS, and an impact modifying amount of a mixture of a fatty acid salt, e.g. sodium stearate, and an acid copolymer, e.g. SMA, are useful as engineering thermoplastics, e.g. for injection molding of articles requiring high impact resistance.
摘要:
Lactones derived from gamma-hydroxy acids are employed as coupling agents for polymers derived from alkali metal-initiated polymerizations. These coupling agents provide effective coupling without formation of undesirable by-products.
摘要:
An improved process for the production of epoxidized rubbery polymers substantially free of gel which comprises carrying out the epoxidation in an aliphatic or alicyclic hydrocarbon diluent with hydrogen peroxide and a mixture of formic acid and at least one other low molecular weight monocarboxylic acid.
摘要:
Implantable medical devices having a metallic surface coated with a bioabsorbable primer polymer layer under a bioabsorbable drug polymer layer. Thus, in addition to the degradation of the drug polymer layer, there is degradation of the primer layer. The underlying metallic framework may or may not degrade depending on whether bioabsorbable or biostable metals are chosen.
摘要:
The present disclosure generally relates to biocompatible polymers for coating or fabricating implantable medical devices and to implantable medical devices having the present biocompatible polymers. The disclosed biocompatible polymers exhibit superior biocompatibility and therefore minimize unwanted immune reaction from a patient into whom a medical device is implanted.
摘要:
Disclosed are drug delivery systems comprising drugs admixed with polymers having drug solubility gradients and methods of making the polymers. Also disclosed are medical devices having coatings thereon comprising the drug solubility gradient-containing polymers and at least one drug.
摘要:
The present disclosure provides a textured dilatation balloon that includes a balloon body having a proximal end, a distal end, and at least one indentation in the balloon body in an un-inflated state, wherein the balloon body comprises a continuous polymer tube with an external surface having at least one therapeutic agent disposed within the at least one indentation.
摘要:
A coated balloon device for stabilizing a section of a blood vessel in a living subject is disclosed. The coating layer of the coated balloon comprises a phenolic compound having a plurality of phenolic groups connected to form a hydrophobic core with peripheral phenolic hydroxyl groups. The coating layer of the coated balloon may contain a hydrophilic polymer to facilitate the release of the phenolic compound. The balloon in general is made of a compliant polymer for atraumatic contact with the blood vessel. In some embodiments, the coating of the coated balloon device further comprises a hydrophilic undercoat layer between the balloon and the coating layer. In some embodiments, the coated balloon device further comprises a sacrificial top coating that dissolves upon delivery into the section of the blood vessel and comprises a hydrophilic composition including sugar, sugar derivatives, or a combination thereof.