226 results about "Reaction injection molding" patented technology

A method for manufacturing elongate articles such as baseball bats, paddles, oars, hockey sticks, generic tubing and other articles and articles including molded material molded about a preform. The preferred method includes manufacturing a filament wound preform and reaction injection molding material about the preform to result in a finished article. The preferred baseball bat includes an elongate filament wound preform about which a quantity of urethane foam is molded.

Thin composite panels with interconnection schemes that are unitized with the panels, i.e., formed integrally and substantially simultaneously with the panels. Further contemplated is the application of an injection molding technique, such as reaction injection molding, in establishing a foam or polymeric core between laminates in thin composite panels. Additionally contemplated is the use of interchangeable laminate components in affording the capability of altering the coloring or other visual features of a reveal in a panel or panels.

The container is a glass bottle (10) encased with a plastic coating (4) from its base section (3) to a sealing rim (2) around its mouth (M) in order to protect against shattering or explosive failure. The glass bottle, preferably a glass inlet, is fillable under pressure with a sprayable medically active substance and a propellant and provided with a delivery element attached to the sealing rim. To facilitate lower injection molding temperatures and pressures and to permit autoclaving at high temperatures the glass bottle with the plastic coating (4) is made by a method which includes injecting at least one reactively cross-linkable plastic capable of being heat-softened into a mold surrounding the glass bottle and forming the plastic coating (4) by a reaction injection molding (RIM) method.

A catalyst system and a process for the bulk addition polymerization or of polycyclic olefins, such as norbornene, methylnorbornene, ethylnorbornene, butylnorbornene or hexylnorbornene, 1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonapthalene, 5,5'-(1,2-ethanediyl)bisbicyclo[2.2.1]hept-2-ene, and 1,4,4a,4b,5,8,8a,8b-octahydro-1,4:5,8-dimethanobiphenylene are disclosed. The catalyst includes an organonickel or organopalladium transition metal procatalyst and an activator compound. Polymerization can be carried out in a reaction injection molding process to yield thermoplastic and thermoset molded polymeric articles possessing high glass transition temperatures.

A method for manufacturing a PU (polyurethane) polishing pad is provided. Resins containing active hydrogen functional groups such as polyol resins, polyamine resins, and polythiol resins, and polyisocyanate resins containing -NCO functional groups are mixed to form a foamed PU polishing pad with excellent polishing properties by reaction injection-molding under high pressure, low temperature and auxiliary gas-adding. The PU polishing pad in accompany with an abrasive slurry can be widely used to polish high-level products such as wafers and optical glass.

The invention refers to a non-glass and flexible solar power module and the method for its manufacture where the module is provided with a circumferential and flexible frame having integrated through-wiring and socket parts, which are formed face-side into the frame, for module interconnection by means of plug-in connectors. The solar module is thoroughly and completely sealed off on its rear side and has a full-surface smooth texture which is established by the insertion of a thin flexible panel, preferably made of plastic, together with the laminate into the form for the manufacture of the frame by means of RIM (reaction injection moulding). The modules are mounted on the building, preferably by means of bonding/cementing to practically any random roof materials, as well as to curved surfaces and without a backward cable lead.

Foamed molded articles produced by reaction injection molding (RIM) are provided. The molded articles are formed by reaction of a polyisocyanate component with an isocyanate reactive component in a mold using a blowing agent. The molded articles are preferably composites formed in the presence of a fibrous reinforcing material. The foamed articles are characterized by relatively short minimum mold residence times, and can thereby be produced more economically than prior art composites. The foamed articles are further characterized by a reduction in physical defects, such as splits and voids.

The present invention provides processes for infrastructure repairs and geo-stabilization with a low-exotherm polyurethane foam, grout or elastomer. The inventive process involves at least partially filling a cavity in the infrastructure or earth with a low-exotherm polyurethane foam, grout or elastomer made from at least one polyisocyanate, at least one isocyanate-reactive compound and an organic particulate material capable of absorbing heat, optionally in the presence of one or more chosen from water, surfactants, pigments, catalysts, alkali silicates and fillers and curing the polyurethane foam, grout or elastomer. The inventive processes may improve the repair of buildings, foundations, roads, bridges, highways, sidewalks, tunnels, manholes, sewers, sewage treatment systems, water treatment systems, reservoirs, canals, irrigation ditches, etc.; and in the geo-stabilization of mines, caves, wells, bore-holes, ditches, trenches, pits, cracks, fissures, craters, postholes, potholes, sinkholes, wallows, waterholes and the like. The inventive solid polyurethane compositions are made from at least one polyisocyanate, at least one isocyanate-reactive compound, and an organic particulate material capable of absorbing heat, optionally one or more chosen from water, surfactants, pigments, catalysts and fillers. Such solid polyurethane compositions may improve reaction injection molding (RIM), spray elastomer and cast molding processes.

Embodiments of the invention are directed to softening amorphous polymeric materials based on a combination of thiol, acrylate, ene and epoxy monomers. These materials can soften to the modulus of tissue, have a sharp transition and are highly tunable. The materials have a glassy modulus of 1-7 GPa and exhibit a rubbery plateau in modulus that can range from 100 MPa down to as low as 0.03 MPa, which is at or below the modulus of tissue. They have potential uses as materials for near net shape processing such as casting, stereolithography, reaction injection molding, fused deposition molding and various other forms of 3D printing.

A multi-component lacrosse stick head, made of at least two materials, including a base lacrosse head structure of one material and one or more overlays made of one or more other materials strategically located on the base structure. The base structure and overlays provide particular performance characteristics for the lacrosse head. An embodiment of the invention includes a base lacrosse head structure, and at least one of a ball stop overlay, a sidewall overlay, an edge overlay, a thread opening overlay, and a scoop overlay. The overlays are affixed to the base lacrosse head structure by, for example, insert molding, over molding, reaction injection molding, spray application, rotational molding, dual extrusion, casting, or an interference fit.

The invention relates to a fiber-reinforced modified-reaction injection-molding nylon sheet and a preparation method thereof, belonging to the field of composite material preparation. An amide monomer is used as a basal raw material; a catalyst, an auxiliary catalyst, an auxiliary antioxidant, a stabilizing agent, a surface conditioning agent, and the like are added; and the materials are injected into a high-temperature mold cavity with preset fibers by an RIM and thermally pressed and molded to prepare the reinforced modified-reaction injection-molding nylon sheet. The prepared sheet comprises the following ingredients by mass percentage: 30 to 95 of amide monomer, 3 to 70 of fiber, 0.01 to 2 of catalyst, 0.01 to 10 of auxiliary catalyst, 0.1 to 2 of antioxidant, 0.1 to 2 of stabilizing agent and 0.1 to 1 of surface conditioning agent, wherein the amide monomer is caprolactam or dodecalactam, the fiber is one of glass fiber, carbon fiber or aramid fiber and is in the form of fiber cloth, short-cut fiber or compound fiber. Compared with common reaction injection nylon and monomer cast nylon sheets, the reaction injection-molding nylon sheet has stronger carrying capability, low manufacture cost and easy popularization and application.

A process for manufacturing ophthalmic lenses is described. This process has several phases, including raw material processing, material metering and dispensing, the material shaping, and ejection/de-molding. The material-shaping phase can utilize various molding processes including compression molding, thermoforming, reaction injection molding, or injection molding. The process allows re-use of the shaping molds/dies and can be automated.

Main chain thermotropic liquid crystal esters, ester-imides, and ester-amides were prepared from AA, BB, and AB type monomeric materials and were end-capped with phenylacetylene, phenylmaleimide, or nadimide reactive end-groups. The resulting reactive end-capped liquid crystal oligomers exhibit a variety of improved and preferred physical properties. The end-capped liquid crystal oligomers are thermotropic and have, preferably, molecular weights in the range of approximately 1000-15,000 grams per mole. The end-capped liquid crystal oligomers have broad liquid crystalline melting ranges and exhibit high melt stability and very low melt viscosities at accessible temperatures. The end-capped liquid crystal oligomers are stable for up to an hour in the melt phase. These properties make the end-capped liquid crystal oligomers highly processable by a variety of melt process shape forming and blending techniques including film extrusion, fiber spinning, reactive injection molding (RIM), resin transfer molding (RTM), resin film injection (RFI), powder molding, pultrusion, injection molding, blow molding, plasma spraying and thermo-forming. Once processed and shaped, the end-capped liquid crystal oligomers were heated to further polymerize and form liquid crystalline thermosets (LCT). The fully cured products are rubbers above their glass transition temperatures. The resulting thermosets display many properties that are superior to their non-end-capped high molecular weight analogs.

A single-layered polishing pad suitable for chemical mechanical polishing (CMP) of semiconductor wafers, etc., which attains excellent step height reduction and in-plane uniformity and is integrally molded by reaction injection molding, is provided. The polishing pad is a polyurethane-based foam 12 having a desired shape, as obtained by molding a gas-dissolved raw material having an inert gas dissolved under pressure in a polyurethane-base resin raw material by a reaction injection molding method, and includes a polishing region 14 having a polishing surface 14a suitable for polishing semi-conductor materials, etc. and having a Shore D hardness in the range of from 40 to 80 and a stress reduction region 16 which is present in the side opposing to the polishing surface 14a and which, when provided with a stress adjusting portion 22 of a desired pattern, is set up so as to have an amount of deflection, as applied with a load of 0.05 MPa, of 10 μm or more.

The invention discloses a polyurethane elastomer for automobile glass encapsulation and a preparation method thereof. The elastomer is prepared from isocyanate component A and polyhydric alcohols component B with a reaction injection moulding process, wherein the density is larger than 1000kg/cubic meter, and the index number of the isocyanate is 90 to 120, the component A is NCO-capped prepolymer with NCO % being 18 to 28 %, and is the reaction product of aromatic diisocyanate and polyhydric alcohols with low molecular weight; the component B comprises at least 60 percent of polyether polyol with the molecular weight of 1000 to 10000, 1 to 20 percent of arylamine, 0 to 20 percent of alcohol, and 0.2 to 0.5 percent of composite catalyst, and also comprises an antioxidant, a light stabilizer and color paste. The polyurethane elastomer of the invention has excellent mechanical capacity and moderate aging resistant performance, and is applicable to the glass encapsulation with various specifications, especially to the large, ultrathin or complex product.

A polyurethane material is injected into a mold cavity having a reduced pressure to form e.g. the surface portion of a polyurethane covering for a steering wheel. A polyurethane material for forming a substantial inner portion thereof and free of any coloring matter is, then, injected into the cavity. Then, a polyurethane material containing coloring matter is injected into the cavity to form the remaining inner portion of the covering.

An article or polishing pad for altering a surface of a work piece includes a polymer matrix created by reaction injection molding of size controlled gas bubbles within a polyurethane matrix. The proposed liquid urethane precursor is first injected into an actuated mold and cured. The molded product is then removed from the mold and double side faced or ground to form a single thin polishing pad comprising a single layer of homogeneous material.

An acoustical panel assembly (10) includes a panel (12) having a core (13) made of synthetic material and an acoustical device (26) mounted to an exterior surface (14, 16) of the panel (12). The panel (12) may include an integrally formed attachment member (24) for mounting the acoustic device (26), such as a loudspeaker, an exciter, a piezoelectric transducer, or the like, directly to the panel (12) without the need of a separate mounting member. Alternatively, the acoustic device (26) may be mounted directly to the panel (12) without the use of the attachment member (24). The panel (12) can be formed by a reaction injection molding (RIM) process, a reinforced reaction injection molding (RRIM) process, or a structural reaction injection molding (SRIM) process.

The invention discloses a method for manufacturing plastic parts or covering parts, which comprises the two parts of sheet material plastic-absorption molding and reaction injection molding, wherein, the sheet material plastic-absorption molding includes that plastic-absorption molding is carried out on acrylonitrile-butadiene-styrene/acrylic coating exemption sheet material, polypropylene sheet material, polyvinyl chloride sheet material, poly carbon ester sheet material, polythene sheet material, nylon sheet material or acrylonitrile-butadiene-styrene sheet material for manufacturing the finished plastic-absorption products; the reaction injection molding includes that the mixed reactant of polyurethane and glass fibre bunch is poured on the internal surface of the finished plastic-absorption products, the dies are assembled, after complete reaction, the plastic part or covering part used on vehicles is manufactured. The method has the advantages of being suitable for mass production and low harm to environment and human body.

The invention provides a preparation method of a polydicyclopentadiene/rubber in-situ polymerization blending composite material. The method comprises the following steps: dissolving the rubber into the polydicyclopentadiene, taking the aryloxy-tungsten complexes as main catalyst and the alkyl aluminium as cocatalyst, utilizing reaction injection molding technology to prepare the polydicyclopentadiene/rubber blending composite material by in-situ polymerization blending, due to the introduction of the rubber, the polydicyclopentadiene material has high toughness, thus enlarging the application field thereof. By adopting the reaction injection molding method, a high performance polydicyclopentadiene composite material can be prepared simply and effectively. The prepared polydicyclopentadiene/rubber in-situ polymerization blending composite material has higher impact resistant performance of which the impact strength can reach 200-400J/m.