117 results about "Resin cement" patented technology

It is an object of the present invention to provide an improved orthopedic implant system with satisfied biological, mechanical and morphological compatibilities. Solid metal femoral stem (entirely or partially) and solid metal acetabular head (entirely or partially) are covered with diffusion-bonded foamed-shaped sheet made of commercially pure titanium or titanium alloy(s). The open-cells in said foamed metal sheet are impregnated with biocompatible polymethyl methacrylate resin cement, which is reinforced with selected oxides (e.g., alumina, magnesia, zirconia, or a combination of these oxides) along with an application of a small amount of a metal primer agent.

The present invention refers to dental self-curing resin compositions having enhanced mechanical and physical properties. In particular, the present invention relates to dental self-curing resin compositions consisting of (i) a Paste A composition containing the multifunctional prepolymer mixture of 2,2-bis-[4-(2-hydroxy-3-methacryloxypropoxy)phenyl]propane (“Bis-GMA”) and multifunctional prepolymer formed by substituting hydrogen atoms in hydroxyl group with methacrylate groups in the Bis-GMA molecules, and further containing a diluent, an adhesive monomer, a polymerization initiator, a polymerization inhibitor, a light stabilizer, an antioxidant, an inorganic pigment and an inorganic filler; and ii) a Paste B composition containing the same prepolymer mixture in the Paste A composition, and further containing a diluent, an adhesive monomer, a reductant, a polymerization inhibitor, a light stabilizer, an antioxidant, an inorganic pigment and an inorganic filler. The composition according to the present invention has better physical and mechanical properties than that of conventional compositions and is an ointment-ointment system able to be conveniently used.

Dental resin cement materials having unique handling properties are provided that comprise a) filler, b) polymerizable resin, and c) a polymeric handling modifier that is dispersed in the polymerizable resin at 25° C. and that has a molecular weight of between about 500 and 100,000. Components a) b) and c) are present in an amount effective to achieve a Viscosity vs Shear Rate Curve that fits a power law model of F(x)=Ax^B. The correlation value of the material to this curve is greater than 0.85 for both the increasing and decreasing shear rate curves, and the value of B is less than about −0.01.

Resin cements are also provided that comprise acid functionality and water, but which do not comprise an acid reactive filler. Such cements may be self etching, thereby avoiding the need to carry out a separate acid etch step.

The invention discloses a method for cement solidification of a boron-containing radioactive waste resin, which belongs to the technical field of cement solidification of the boron-containing radioactive waste resin of a pressurized water reactor nuclear power station. The method comprises the following steps: the boron-containing radioactive waste resin of the pressurized water reactor nuclear power station, ordinary Portland cement, a water reducing agent, zeolite, lime and water are taken as raw materials, the mixture ratio of the raw materials comprises that the boron-containing radioactive waste resin of the pressurized water reactor nuclear power station: the ordinary Portland cement: the water reducing agent: the zeolite: the lime: the water is equal to 300-500L: 800-1,000kg: 4-5kg: 40-50kg: 25-30kg: 90-110kg, and the raw materials are weighed; and the materials are added into a C1 solidification barrel with a volume of 1 cubic meter and are stirred evenly to obtain a cement solidification body. The adoption of each solidification drum with the volume of 1 cubic meter can solidify 300 to 500L of radioactive resin, and remarkably improve the treatment efficiency of boron-containing radioactive waste resins of pressurized water reactors.

The invention relates to a material used for buildings and a production method of the material. The hybrid nanocomposite material used for buildings provided in the invention includes the following components by weight: 100 parts of cement, 10-30 parts of water-based resin, 0.01-45 parts of a water-based resin curing agent, 25-50 parts of water, 0.5-2 parts of a super plasticizer, 0.1-5 parts of a nano-fiber, 0.1-5 parts of a nano-fiber dispersing agent, 0.01-3 parts of a thickening stabilizer, and 0.02-0.2 part of a foam inhibitor. With the method provided in the invention, the nano-fiber can realize good dispersion and network distribution in a water-based resin system and a subsequent resin/cement hybrid matrix, and can form a compact reticular cemented structure together with hardening resin and cement, thus improving the dynamic shock resistance and dynamic vibration damping performance of the hybrid composite material.

The invention relates to a resinoid wedding agent cubic boron nitride grinding wheel and a manufacturing method thereof, the resinoid wedding agent cubic boron nitride grinding wheel comprises a grinding wheel matrix and a grinding layer, the grinding layer is arranged on the external wall of the grinding wheel matrix and peripheries of an upper end face and a lower end face; the grinding layer includes 12-40% of cubic boron nitride (nickel plating), 25-50% of Dialok939p resin, 1-10% of villaumite grinding aid, 1-10% of a solid lubricant filler, 10-30% of a powder filler with high thermal conductivity and 1-15% of oxide filler by volume percentage of the grinding layer. A specially designed hot pressing dies and separately batch feeding method are adopted, which causes the pressed products to have homogeneous structure and consistent density; the formula of the grinding wheel is simple, and the designed die has the advantages of simple and reasonable structure, easy die filling and die release, the product obtained has high once-pass rate, homogeneous structure and consistent density; the grinding wheel has good grinding performance and long service life, can perform peripheral grinding and end face grinding, and is equivalent to three grinding wheels with the same specification, the matrix and making cost are saved, production cost is reduced, the product value is improved.

The invention discloses a super-slow resin anchoring agent. Unsaturated polyester resin is adopted; one or a plurality of tertiary amine accelerant, quinhydrone, naphthaquinone or other polymerization inhibiting stabilizer with similar functions, and other chemical assistant and filler are added in resin production or later process to be mixed into resin cement; initiator (solidifying agent) is one or a plurality of dibenzoyl peroxide or other similar peroxide, pasty or powdered solidifying agent diluted by water, stone powder or other inert materials; and the mixture is packaged into scrolls by a diplopore film bag or packaged by a barrel or other packaging modes. In the formulation, the super-slow resin anchoring agent produced through fine adjustment, which has gelling time of between 10 and 180 minutes and compressive strength not less than 40MPa, so the super-slow resin anchoring agent can meet special requirements of long engineering construction, high strength requirement, and the like.

The invention discloses a method for solidifying radioactive waste resin cement, and belongs to the technical field of radioactive waste treatment. The method for solidifying the radioactive waste resin cement by a dura fiber comprises the following steps of: mixing the dura fiber, zeolite, cement, dehydrated radioactive waste resin and water uniformly, pouring the mixture into a test die and curing to obtain a cement solidified body. The dura fiber is 0.1 to 0.5 mass percent of a mixture of the zeolite and the cement; and the mass ratio of the cement to the dehydrated radioactive waste resin to the water is 1 to (0.3-0.5) to 0.35. The shock resistance of the obtained cement solidified body is enhanced obviously, the surface has no crack, and the performance indexes all meet the requirement of the national standard. The compression strength of the solidified body for 28 days is more than 11.5 MPa, and the breaking strength of the solidified body is more than 3.1 MPa.

The invention discloses a repair reinforcing structure of a steel bridge deck and a repair reinforcing method of the repair reinforcing structure. The repair reinforcing structure comprises the steel bridge deck, and is characterized in that the upper surface of the steel bridge deck is welded with a plurality of longitudinal steel ribs and a plurality of transverse steel ribs, the longitudinal steel ribs and the transverse steel ribs are mutually staggered to form a gridding supporting structure, crushed aggregates are filled in rectangular grooves of the gridding supporting structure, steel cover plates are arranged above the rectangular grooves and are fixedly welded with the longitudinal steel ribs and the transverse steel ribs, the adjacent steel cover plates are connected in a welded manner, epoxy resin cement paste is filled in a gap between the steel bridge deck and each steel cover plate and gaps among the crushed aggregates, and a cold-mixing resin bituminous concrete bridge deck paving layer is paved on the steel cover plates. The repair reinforcing structure of the steel bridge deck has the advantages that the repair reinforcing structure of the steel bridge deck is reliable in quality, convenient in construction, relatively low in comprehensive manufacturing cost and convenient in repair.

The invention relates to a method for making a shock-resistant and energy-dissipating framework by mixing resin concrete and reinforced concrete, which comprises the following six steps of: (1) reserving a position of the framework, at which a plastic hinge is possible to emerge, and pouring other parts of the framework according to an original construction design; (2) conserving the concrete poured in the framework for 14 days, carving burrs from the concrete around the reserved position, clearing gravels and dust off and cleaning the surface by acetone; (3) priming a layer with a thickness of 3 to 5mm by resin cement; (4) supporting a template at the reserved position; (5) preparing and pouring the resin concrete; and (6) standing and conserving the resin concrete framework over 10 DEG C for 72 hours and stripping a mold. Because the ultimate compression strain of the resin concrete is far greater than that of the ordinary concrete, the resin concrete is filled at an appropriate position in an ordinary reinforced concrete framework to form a mixed framework structure. Therefore, the framework can consume earthquake energy on the premise of not being damaged entirely. The method has a practical value in the technical field of civil engineering.

A method of filling and sealing a root canal during an endodontic procedure, the method comprising: a) filling the root canal with a combination comprising: i) an obturator composed at least in part of a chemically-bondable material; and ii) a self-etching adhesive or self-adhesive resin-based cement or sealer; and b) curing the combination to seal the root canal. Also disclosed is a kit for carrying out the method, the kit comprising: a) an obturator composed at least in part of a chemically-bondable material; and b) a self-adhesive resin-based cement or sealer.

The composite polymer material for manhole cover is one kind epoxy resin cemented concrete, and consists of epoxy resin fluid an in 10-20 wt% and compounded concrete B in 80-90 wt%. Manhole cover made of the material has high toughness and high shock strength, can prevent damage during transportation, construction and use. It is also anticorrosive, has no noise produced and may be colored.

The present invention relates to building member and its construction process and is especially composite arched structure of fiber reinforced plastic and concrete. The present invention proposes one kind of arced structure with laminated fiber reinforced plastic adhered to the surface of concrete and its construction process. The construction process includes forming concrete arch, milling surface with grinding wheel to eliminate floated surface mortar and roughen the surface, smearing epoxy resin-cement putty to flat the surface, painting primer with structural glue, coating with fiber fabric, soaking the fiber fabric with resin adhesive, covering with polyester film, extruding with scraper the excessive resin adhesive, curing and taking down the polyester film. The composite arched structure is corrosion resistant and durable, and has doubled bearing capacity and simple construction.

The invention belongs to the technical field of concrete and in particular relates to a thermoplastic resin coated water-borne epoxy resin cement concrete crack self-repairing microcapsule and a preparation method thereof. The microcapsule consists of water-borne epoxy resin microcapsule and a curing agent microcapsule, wherein the water-borne epoxy resin microcapsule consists of the following components in parts by weight: 30-55 parts of paraffin, 5-10 parts of a petroleum resin and 35-65 parts of a water-borne epoxy resin; the curing agent microcapsule consists of the following components inparts by weight: 35-60 parts of paraffin, 5-10 parts of a petroleum resin and 30-60 parts of a curing agent. In case of concrete cracks, the microcapsule is applied to an expanding crack, under the action of expansion force of the tip point of the crack, the wall of the microscopes can be easily broken, then the water-borne epoxy resin and the curing agent inside the microcapsule can flow out anddiffuse into the concrete crack, a curing reaction can be resulted, the crack can be then repaired, and thus the service life of concrete can be prolonged.

The invention relates to an inorganic proton exchange membrane fuel cell membrane electrode preparation method. the preparation method, its characteristic lies in that it includes the following steps: 1) inorganic proton exchange membrane preparation: a) first prepares the heteropolyacid and the inorganic oxide compound forerunner body mix solution; b) the surface active agent solution preparation; c) inorganic proton conduction powder forerunner body preparation; d) inorganic proton exchange membrane preparation: The inorganic proton conduction powder forerunner body which step c) prepares sets in the culture dish, dry, high temperature burning, obtains the inorganic proton conduction powder, joins the thermoplastic resin cementing agent rmo-compression to prepare the inorganic proton exchange membrane; 2) inorganic proton exchange membrane-catalysis layer module preparation; 3) inorganic proton exchange membrane -catalysis layer module seal; 4) inorganic proton exchange membrane fuel cell membrane electrode preparation. The membrane electrode operating temperature of the method preparation is high (may be higher than 200 degree centigrade).

The invention relates to the field of road construction, in particular to resin cement for levelling cement concrete road surface. The resin cement for levelling cement concrete road surface overcomes the shortages of existing methods for levelling cement concrete road surface and especially solves the problem that common cement concrete has the disadvantages of low cement concrete bonding strength, slow strength development, long solidification time, long traffic hampering time and the like when common cement concrete is used for repairing road surface. The resin cement is prepared from 10-20% of epoxy resin, 0.2-0.5% of curing agent, 5-15% of polyving alcohol particle of which the particle size is 2-3cm, 3-10% of polyving alcohol powder of which the particle size is 70-80 meshes, 5-10% of 108 glue, 2-6% of asbestos fiber with 70-80 meshes, 0.5-2% of common silicate cement, 2-5% of sand and water. The resin cement has strong cohesive force with old road surface after solidifying, does not need to cut and chip damaged sites of the old road surface, has the characteristics of quick hardening, early strength, small contraction, small chromatic aberration with old concrete, strong cohesive force, abrasion resistance, endurance and convenient construction and is favourable for improving road surface repair quality and speed.

The invention discloses a method for curing a radioactive waste resin by NaAlO2 coagulant cement, and belongs to the technical field of radioactive waste resin cement curing. The method comprises the following steps of mixing sulfoaluminate cement, a composite mineral additive, NaAlO2 and NaOH well, stirring the mixture and a radioactive waste resin in a stirring kettle, transferring the mixture obtained by the previous step into a mold and maintaining for curing. The method is utilized for curing a radioactive waste resin, improves a capacity and compressive strength of cured waste, and shortens coagulation time.