Abstract: A deformable surgical repair device is manufactured from a block or graft copolymer. The copolymer comprises a plurality of first linkages selected from the group consisting of glycolic acid ester and lactic acid ester linkages, and mixtures thereof, and a plurality of second linkages selected from the group consisting of 1,3-dioxan-2-one; 1,4-dioxan-2-one and .epsilon.-caprolactone linkages. The plurality of first linkages comprises at least about 50 up to about 90 mole percent of the copolymer. In an alternative Claim, the deformable surgical repair device is manufactured from a blend of a first and a second absorbable polymer. The first absorbable polymer comprises a plurality of linkages selected from the group consisting of glycolic acid ester and lactic acid ester linkages, and mixtures thereof. The second absorbable polymer comprises a plurality of linkages selected from the group consisting of 1,3-dioxan-2-one; 1,4-dioxan-2-one and .epsilon.-caprolactone linkages.

Abstract: Dental restorative compositions of the composite resin/glass ionomer hybrid type and resins used in the compositions. The compositions contain an aromatic-moiety-containing polymerizable resin, a finely divided ion-leachable fluoroaluminosilicate glass filler, a polymerization initiator system, and may contain other components. The aromatic-moiety-containing polymerizable resin has at least one carboxylic acid group and at least one ethylenically unsaturated group such as a (meth)acrylate group. The compositions have improved mechanical strength, improved wear resistance, and sustained long-term fluoride release.

Abstract: The present invention provides a resin-based dental restorative that exhibits high condensability, low volumetric shrinkage and low shrinkage stress. To this end, one or more of a rheological modifier, dispersant and fluorocopolymer are mixed with a methacrylate resin and a fine mineral filler in amounts effective to improve the condensability of the resulting composite to achieve amalgam-like condensation, to reduce the volumetric shrinkage to less than about 2% during polymerization, to improve wear resistance, and to provide a composite with generally improved physical properties.

Abstract: The invention relates to impression compositions based on vulcanizable pother materials, which are characterized in that the ready-mixed pastes comprisea) approx. 30 to 70 wt. % of aziridino-polyether,b) approx. 5 to 20 wt. % of a triacyl glyceride of non-animal origin which has a stearoyl content of .gtoreq.70 wt. %, based on the acyl content of the triacyl glyceride, or, in the case of a lower stearoyl content and if this adversely influences the storage stability of the impression composition, has been esterified in itself beforehand, andc) approx. 10 to 65 wt. % of customary catalysts, auxiliaries and additives,in each case based on the total weight of the composition.The impression compositions are distinguished by consistently good mechanical properties of the polymerized materials, have a comparatively low proportion of aziridino-polyether, which has a favourable effect on their preparation costs, and can easily be mixed.

Abstract: A method for controlling the gel point of a bone cement containing poly(polypropylene fumarate), a cross-linking monomer, an initiator, an inorganic filler, and a radical initiator. The gel point is controlled by varying the molecular weight of the poly(polypropylene fumarate) while maintaining the weight average molecular weight (M.sub.w) of the poly(polypropylene fumarate) above 2000 and the polydispersity index of the poly(polypropylene fumarate) below 2. In a preferred embodiment, the molecular weight of the poly(polypropylene fumarate) greater than 4000, and more preferably greater than 5000.

Abstract: The present invention provides a dental composite which has the high strength required for load bearing restorations, yet maintains a glossy appearance, even after substantial wear. Through the use of particles having a mean particle size between about 0.05 .mu.m and about 0.50 .mu.m, the composite is useful in stress bearing restorations and in cosmetic restorations. The structural filler used is typically ground to a mean particle size of less than 0.5 .mu.m and also includes a microfill having a mean particle size less than 0.05 .mu.m to improve handling and mechanical characteristics. The preferred dental composites maintain their surface finish even after substantial use and also have the strength properties of hybrid composite resins. The structural filler is ground, typically by agitator milling, to the preferred particle size.

Abstract: Systems, apparatus combinations and methods for producing a powder coating are provided wherein a stream of a powder coating precursor including at least one resin and at least one additional powder coating ingredient is contacted with a process fluid effective to reduce the viscosity of the powder coating precursor to allow processing of the powder coating precursor at a lower temperature.

Abstract: Ready-to-use, packaged, dental composition curable by UV, light or laser beams, for the preparation of dental fillings, inlays, onlays, crowns, bridges, artificial teeth, dental protheses and implantates with a container, impervious for UV or light, which houses a dental composition in such a fashion that it is affected from the effects of UV or light during storage while it can be removed for use, whereby the dental composition comprises the following: a matrix polymerizable and/or curable to a duroplastic or thermoplastic dental resin by means of UV, light or laser beams, into which a micro-fine inorganic filler is incorporated, and into which filaments or a web in the form of a mat, a ribbon, a tube or a cord is embedded; as well as a tool for applying pressure during the use of the dental composition for the purposes of filling cavities.

Abstract: The use of falling-film evaporation and a concentration means such as centrifugal separation to dehydrate and concentrate a water-in-oil polymer emulsion or suspension is disclosed. In a preferred embodiment, a water-in-oil polymer composition containing less than about 25% active polymer solids is dehydrated in falling-film evaporator to produce an evaporator concentrate containing less than about 5.0% water. The evaporator concentrate then flows to a separation device such as a centrifuge, wherein oil is removed to produce a composition that is substantially a polymer and emulsifying surfactant-in-oil composition containing in excess of about 60 weight % polymer solids. The centrifuge raffinate may optionally be treated in a second separation means to capture additional polymer solids, with optional recycle of the oil-rich raffinate. The concentrated polymer composition is preferably stabilized with a steric stabilizer to produce a free flowing liquid product.

Abstract: Novel biomimetic hydrogel materials and methods for their preparation. Hydrogels containing acrylamide-functionalized carbohydrate, sulfoxide, sulfide or sulfone copolymerized with a hydrophilic or hydrophobic copolymerizing material selected from the group consisting of an acrylamide, methacrylamide, acrylate, methacrylate, vinyl and a derivative thereof present in concentration from about 1 to about 99 wt %. and methods for their preparation. The method of use of the new hydrogels for fabrication of soft contact lenses and biomedical implants.

Abstract: A method for lowering the extractable protein content in a natural rubber latex to below 30 parts per million (ppm) comprises the steps of treating by washing a rubber article, such as a rubber glove, with an aqueous solution containing a soluble silicate and, optionally, a protease. The methods claimed effectively reduce the allergenicity of the articles so treated.

Abstract: The invention relates to an aluminofluorosilicate glass for use in a material for dental restoration, which has the following features:a) a ratio of Al (calculated as Al.sub.2 O.sub.3) to Si (calculated as SiO.sub.2) of 0.57-1.12 by mass;b) a total content of Mg (calculated as MgO) and Ba (calculated as BaO) of 29-36% by mass;c) a ratio of Mg (calculated as MgO) to Ba (calculated as BaO) of 0.028-0.32 by mass;d) a content of P (calculated as P.sub.2 O.sub.5) of 2-10% by mass.The glass according to the invention has a high radiopacity, and the refractive index n.sub.D for visible light can be adjusted by varying the phosphorus content.

Abstract: An adhesive composition for surgical use including an .alpha.-cyanoacrylate adhesive composition with a polymer characteristic for biodegrading and bioabsorbing the adhesive into the body of a living organism. It is preferred that the polymer is a co-polymer of DL-lactic acid and .epsilon.-caprolactone or a co-polymer of DL-lactic acid, ethylene glycol and .epsilon.-caprolactone, or a co-polymer of ethylene glycol and .epsilon.-caprolactone.

Abstract: A modified particle is disclosed wherein a particle has an attached group having the formula: ##STR1## wherein Ar represents an aromatic group; R.sup.1 represents a bond, an arylene group, an alkylene group ##STR2## wherein R.sup.4 is an alkyl or alkylene group or an aryl or arylene group; R.sup.2 and R.sup.3, which can be the same or different, represent hydrogen, an alkyl group, an aryl group, --OR.sup.5, --NHR.sup.5, --NR.sup.5 R.sup.5, or --SR.sup.5, wherein R.sup.5, which is the same or different, represents an alkyl group or an aryl group; and Q represents a labile halide containing species. Also disclosed is a modified particle or aggregate having attached a group having the formula: ##STR3## wherein CoupA represents a Si-containing group, a Ti-containing group, or a Zr-containing group; R.sup.8 and R.sup.9, which can be the same or different, represent hydrogen, an alkyl group, an aryl group, --OR.sup.10, --NHR.sup.10, --NR.sup.10 R.sup.10, or --SR.sup.10, wherein R.sup.

Abstract: The high aromatic oil provided in the present invention is characterized by that a glass transition point is -45 to -20.degree. C. and an aromatic component measured by Clay-Gel method accounts for 55 to 90% by weight and that a polycyclic aromatic compound measured by IP 346 method accounts for less than 3% by weight based on the whole components of hydrocarbons contained in the oil.This high aromatic oil can suitably be used for various rubber compositions such as tires, rubber vibration insulators and fenders, oil extended synthetic rubbers, printing inks and writing inks.

Abstract: A thermoplastic molding composition having low haze values, suitable for optical applications is disclosed. The compositions contains a resinous component selected from the group consisting of (i) a homogeneous blend of polycarbonate resin and polycaprolactone and (ii) a copoly(carbonate-lactone) block or random copolymer, and melanin in an amount of 0.1 to 1.0 parts per hundred parts of weight of the resinous component.

Abstract: The invention relates to an adhesive system for fixing dental restorative materials to hard dental substance constitutingi) a component which contains at least one activator which is a constituent of a chemical initiator system, and contains at least one ethylenically unsaturated compound which is capable of polymerization,ii) a component which contains at least one ethylenically unsaturated compound which is capable of polymerization but otherwise contains no further activator, which is able to start chemical curing with the activator from component i), andiii) a dental restorative material which contains at least one activator which, together with the activator from i), is able to start a polymerization reaction, or a cement for fixing dental restorative materials that have already cured, which contains at least one activator which, together with the activator from component i), is able to start radical polymerization.

Abstract: A biologically degradable polymer mixture contains at least one starch biopolymer made from renewable raw materials, a plasticizer, and a polymer selected from the following materials: an aromatic polyester; a polyester-copolymer with both aliphatic and aromatic blocks; a polyesteramide; a polyglycol; a polyester urethane; and/or mixtures of these components.

Abstract: A silicone composition useful for dental temporary sealing is disclosed, which comprises:(A) 100 parts by weight of an organopolysiloxane having at least two aliphatic unsaturated hydrocarbons in one molecule and having a viscosity of from 50 to 1,000 cSt at 25.degree. C.;(B) from 0.1 to 40 parts by weight of an organohydrogenpolysiloxane having at least three hydrogen atoms directly bonded to a silicon atom in one molecule;(C) from 10 to 500 ppm, based on the total amount of (A) and (B), of a silicone-soluble platinum compound;(D) from 10 to 400 parts by weight of an inorganic filler; and(E) a finely powdered silica having a BET specific surface area of from 50 to 500 m.sup.2 /g, the surface of which is made hydrophobic.

Abstract: A liner composition for a potable fluid container closure element which includes an inorganic sulfite such as sodium sulfite and/or a tocopherol compound such as a dl-.alpha.-tocopherol (vitamin E) for preventing off-flavors due to the presence of aldehydes in the fluid. Also, a potable fluid container of a reservoir element for containing a potable fluid, the reservoir element having an opening, a closure element capable of being attached to the opening, and the liner composition associated with the closure element. Also, a method of improving the taste of a potable fluid such as bottled water by use of the container and one of the previously described liner compositions associated therewith. Also, an improved method for processing the composition into closure liners based upon the prevention of the development of off-flavor-causing substances therein.