Abstract: Compatibilizing agents suitable for blending otherwise immiscible polymers comprise a block or graft copolymer in which at least one of the block segments is formed by a living anionic polymerization and thereafter chemically converted to provide a polymer having at least one functional end group. The functional groups of the polymer blocks thus formed are reacted with a functionalized monomer, or an oligomer to provide a second block polymer segment. Compatibilizing agents containing more than two blocks may be formed in similar fashion. The compatibilizing agents are used to provide uniform blends of polar and non-polar polymers having superior uniformity and other physical properties.

Abstract: This invention relates to medical devices formed totally or in part from homopolymers or copolymers comprising recurring carbonate moieties.

Abstract: A copolymer comprising a bioabsorbable, segmented molecular architecture has been invented. The copolymer has at least two different ester linkages. The segmented molecular architecture comprises a plurality of fast transesterifying linkages. The fast transesterifying linkages have a segment length distribution of greater than 1.3. The segmented molecular architecture also comprises a plurality of slow transesterifying linkages. The following proviso is a material limitation to this invention: for the fast transesterifying linkages consisting essentially of glycolate linkages and the slow transesterifying linkages selected from the group consisting of trimethylene carbonate and caproate linkages, the segment length distribution of the fast transesterifying linkages is up to 2.0 and the number average segment length of the slow transesterifying linkages is greater than 2.5 linkages per segment.

Abstract: Block copolymers have a first polymer block wherein glycolide is the predominant component and a second block having glycolide, lactide and trimethylene carbonate linkages. The copolymers are useful in forming surgical devices, including monofilament sutures.

Abstract: Block copolymers of polyoxazoline and polylactone moieties can be used as polymeric compatibilizers for polyamides and polyolefins.

Abstract: Block copolymers can be formed from heterocyclic polymers such as PBO and thermoplastic polymers such as polyamide or poly(aromatic ether ketone). The block copolymer compositions are thermoplastic and do not experiSTATEMENT OF GOVERNMENT INTERESTThis invention was made with Government support under contract F33615-86-C-5068 awarded by the Department of the Air Force. The Government has certain rights in this invention.

Abstract: This invention relates to medical devices formed totally or in part from homopolymers or copolymers comprising recurring carbonate moieties.

Abstract: This invention relates to a novel polycarbonate-based block polymer, and to fibers and bioresorbable implantable medical devices fabricated from said fibers.

Abstract: Block copolymers can be formed from heterocyclic polymers such as PBO and thermopSTATEMENT OF GOVERNMENT INTERESTThis invention was made with Government support under contracts F49620-86-C-0057 and/or F33615-86-C-5068 awarded by the Department of the Air Force. The Government has certain rights in this invention.

Abstract: Copolymers of blocks of polymers of cyclic aliphatic carbonates, cyclic aliphatic esters or cyclic aliphatic carbonates and cyclic aliphatic esters on the one hand and blocks of polymers of cyclic aromatic carbonates on the other hand and a process for their production by multistage polymerization, in which a block polymer is initially prepared from the aliphatic monomer and the aromatic polymer is produced in the presence of this block.

Abstract: The present invention relates to a process for producing degradable, shrinkable films of polyhydroxy acid and plasticizers including melt processing the materials to obtain uniform composition, forming the composition into a film, and biaxially orienting the film. Also, non-shrinkable films are produced by heat-setting the biaxially oriented films at temperature above the composition glass transition temperature and below its melt temperature while maintaining the film under restraint. Films thus produced are useful for disposable, environmentally benign packaging and other conventional film uses.

Abstract: A moldable polyblend of an aromatic polycarbonate, a polyester of an aromatic dicarboxylic acid, an elastomeric rubber, and a polylactone, which polylactone is present within the range of from about 1.0 to about 10 weight % of the polyblend.

Abstract: Block copolymers can be formed from heterocyclic polymers such as PBO and thermoplastic polymers such as pSTATEMENT OF GOVERNMENT INTERESTThis invention was made with Government support under contract F33615-86-C-5068 awarded by the Department of the Air Force. The Government has certain rights in this invention.

Abstract: Thermoplastic moulding compounds containing(A) from 5 to 90 parts by weight of one or more thermoplastic polymers,(B) from 5 to 90 parts by weight of one or more graft polymers and(C) from 0.25 to 40 parts by weight of a copolymer having a sequential structure corresponding to the idealized formula (I)(A-X-B).sub.n (I)whereinA=a polymer of a cyclic carbonate,B=a polymer of another cyclic ester andX=a middle member containing both partial structures of A and B.

Abstract: Polymer mixtures having high tensile strength and good tear propagation resistance, consisting of(A) from 10 to 95 parts by weight of a graft polymer,(B) from 0 to 75 parts by weight of a thermoplastic resin component and(C) from 5 to 60 parts by weight of a copolymer having a sequence type of structure corresponding to the idealized formula (I)(A--X--B).sub.n (I)whereinA=polymer of a cyclic carbonate,B=polymer of another cyclic ester andX=middle member containing partial structures of both A and B.

Abstract: This invention relates to medical devices formed totally or in part from homopolymers or copolymers comprising recurring carbonate moieties.

Abstract: This invention relates to novel copolymers containing carbonate repeat units and ester repeat units.

Abstract: The invention relates to mixtures containing1. thermoplastic, aromatic polycarbonates and/or thermoplastic, aromatic polyesters and2. copolymers corresponding to formula (Ia)--A--X--.sub.r (Ia) and, optionally, stabilizers, pigments, mold release agents, flameproofing agents and/or antistatic agents. The invention also relates to a process for the production of the mixtures.

Abstract: The invention relates to thermoplastic polycarbonate mixtures containing aromatic polycarbonates and aliphatic polycarbonates and, optionally, stabilizers, pigments, mold release agents, flameproofing agents and/or antistatic agents. The invention also relates to a process for the production of the polycarbonate mixtures.

Abstract: A binder which is water-dilutable on protonation with acid and obtainable by a reaction of(A) an epoxy resin having an average molecular weight of from 300 to 6,000 and on average from 1.5 to 3.0 epoxide groups per molecule and(B) from 20 to 30 mol %, based on the amount of epoxide groups present in epoxy resin (A), of one or more secondary amine and/or alkanolamine of up to 40 carbon atomsand subsequent reaction with(C) a copolymer which is based on butadiene and acrylonitrile and contains primary and/or secondary amino groups, the amount of (C) being so dimensioned that the number of primary and secondary amino groups corresponds to from 1 to 50 mol % of the epoxide groups present in the epoxy resin (A), and also(D) with one or more primary and/or secondary amine to convert any epoxide groups still present, is usedin particular for cathodic electrocoating.

Abstract: Novel polylactide composition containing segments or poly(R-lactide) interlocked with segments of poly(S-lactide).

Abstract: Miscible blends of solids, non-crosslinked polymers are disclosed. The blends comprise from 2 to 95 parts by weight of a water-insoluble, hydrophobic polymer and, correspondingly from 98 to 5 parts by weight of a hydrophilic polymer. The blends are capable of absorbing at least their own weight in water.

Abstract: Novel polylactide composition containing segments of poly(R-lactide) interlocked with segments of poly(S-lactide).

Abstract: A solution of a non-reactive polymer in a liquid oxazoline which may include a reactive additive such as a polyisocyanate to provide solid polymers by interpolymerization of the oxazoline and reactive additive are described.

Abstract: Copolycarbonates are prepared by ring-opening cyclic polycarbonate oligomers with various nucleophilic polymers. The latter include "living" anionic vinyl polymers; polymers such as polyphenylene ethers or hydroxyaryl-terminated polyimides which contain deprotonated hydroxy or carboxy groups; polymers containing neutral nucleophilic moieties, such as secondary amine-terminated polyimides, polyethersulfones and polyetherketones; and anionic polymers of ring-opened compounds such as cyclic polysiloxanes, lactams and lactones.

Abstract: A pharmaceutically or veterinarily acceptable amphipathic, non-cross linked linear, branched or graft block copolymer, which has a minimum weight average molecular-weight of 1000, in which the hydrophobic component is biodegradable or hydrolytically unstable under normal physiological conditions, and the hydrophilic component may or may not be biodegradable or hydrolytically unstable under such conditions, and which copolymer is self-dispersible in water; together with mixtures of such a copolymer and a drug, which may be water-soluble of water-insoluble, which mixtures are self-dispersible in water; and processes for the manufacture of such copolymers and such mixtures.

Abstract: Novel polylactide composition containing segments of poly(R-lactide) interlocked with segments of poly(S-lactide).

Abstract: Moulding compounds consisting of a mixture of (A) from 99.99 to 60 parts, by weight, of a polyoxymethylene; (B) from 0 to 40 parts, by weight, of an elastomer having a softening temperature below the crystallite melting point of polyoxymethylene (A) and a freezing point below 0.degree. C.; and (C) from 0.01 to 40 parts, by weight, of an aliphatic, rubber-like, high molecular weight adipate-carbonate mixed ester.

Abstract: An acetal resin composition comprising an acetal resin and a low molecular weight polycarbonate compound having an intrinsic viscosity of 0.2 dl/g or less in methylene chloride at 25.degree. C. and, optionally, an organic or inorganic filler is disclosed. Said composition has improved surface gloss and weather resistance.

Abstract: The invention is directed to a molding composition comprising an intimate, well dispersed blend of thermoplastic polyurethane, thermoplastic polyphosphonate and thermoplastic polycarbonate which composition is characterized by an improved level of flame resistance. A process for the preparation of said composition is also disclosed.

Abstract: The present invention pertains to a method for reducing the processing temperature of a thermoplastic polymer comprising blending the thermoplastic polymer in powder form with an effective amount of a compound having a softening temperature of about 20.degree. to 200.degree. C. lower than the softening temperature of the thermoplastic polymer. The invention further pertains to novel chemical blowing agent concentrates.

Abstract: The present invention pertains to a method for reducing the processing temperature of a thermoplastic polymer comprising blending the thermoplastic polymer in powder form with an effective amount of a compound having a softening temperature of about 20.degree. to 200.degree. C. lower than the softening temperature of the thermoplastic polymer. The invention further pertains to novel chemical blowing agent concentrates.

Abstract: A highly-reactive powder resin composition suitable for use in the production of coatings comprising a mixture of(A) at least one polymer containing groups selected from hydroxyl and epoxy-groups, having a melt viscosity of 2 000 to 20 000 cP at 160.degree. C. and a melting range of from 45.degree. to 95.degree. C.; and(B) at least one compound of formula ##STR1## wherein R represents an aliphatic hydrocarbon group-- being substituted by an ester or a carboxy group or being interrupted by an O-ether linkage --R.sup.1 represents phenyl or naphthyl andy is an integer from 2 to 4said component B having a melt viscosity of 50 to 15 000 cP at 160.degree. C. and a melting range of from 40.degree. to 250.degree. C.;the combination of A and B having a melt viscosity of from 500 to 20 000 cP at 160.degree. C., a stability of from 1 to 15 at 100.degree. C., a flow time of from 20 to 600 s at 160.degree. C., and a gel time of from 35 to 1,200 s at 160.degree. C. and an article coated with said composition.

Abstract: The present invention relates to a new organic heterocyclic isocyanate which is the reaction product of an organic diisocyanate and an amino or hydroxy nitrile. The invention also relates to a process of producing such isocyanates by reacting an excess of the diisocyanate with the nitrile under conditions under which the nitrile will not decompose and then maintaining the reaction mixture at an elevated temperature until the isocyanate nitrile adduct cyclizes. The reaction may be carried out in the presence of a catalyst for isocyanate addition reactions. Additionally, the invention relates to a process for the production of polyurethane by the reaction of the heterocyclic isocyanates with compounds carrying at least two isocyanate reactive hydrogen atoms per molecule.

Abstract: The subject of the present invention is a process for the preparation of new high-molecular weight polyester-polycarbonates which contain incorporated segments containing carboxyl groups and can be processed by thermoplastic methods, which process is characterized in that segments which contain carboxyl groups and have average molecular weights Mn (number-average of the molecular weight determined via the acid number of the segments containing carboxyl groups) of greater than about 600, preferably of greater than about 800 and in particular of between about 1,000 and 20,000, are reacted with diphenols and phosgene by the known two-phase boundary polycondensation process at a pH value of between about 9 and 14 and at a temperature of between about 0.degree. C. and 80.degree. C. and preferably of between about 15.degree. C. and 40.degree. C. and the resulting reaction products are either subjected to a heat treatment at temperatures of between about 40.degree. C. and 170.degree. C.

Abstract: Block copolymer of the structure A-B wherein:A is a polylactone block of recurring units: ##STR1## wherein PM is a linear polymethylene chain having from 2 to 13 carbon atoms,B is a polyoxymethylene block of recurring units --CH.sub.2 O--. The block copolymer contains at least 2 wt.% of block B and at least 0.1 wt.% of block A.The block copolymer can be used as modified polyacetal when rich in block B, or as special additive for plastics materials when rich in block A.