73results about How to "Little change over time" patented technology

The invention provides an antistatic surface protection film, the pollution to a pasted body is light, and the antistatic surface protection film is provided with excellent anti-stripping electrostatic properties without time dependent degradation. The antistatic surface protection film is formed in a way that a binder layer (2) composed of a binder composition is formed on one side of a base film (1) formed by a transparent resin, the binder composition comprises an acrylate-based polymer containing copolymers, (F) an isocyanate compound containing more than two functional groups, (G) a crosslinking accelerator and (H) a ketone-enol tautomer compound, a stripping agent layer (4) containing an antistatic agent is laminated on one side of a resin film (3) to form a stripping film (5), and the stripping film (5) is attached to the surface of the binder layer (2) through the stripping agent layer (4). The stripping agent layer (4) is formed by a resin composition, and the resin composition comprises a stripping agent taking dimethyl polysiloxane as the key component, a polysiloxane compound which is liquid under 20 DEG C and an antistatic agent, and the stripping electrostatic pressure of the binder layer (2) is lower than +/-0.6kV.

A thermosensitive Mn-Zn ferrite series is prepared from Fe2O3, ZnO, CuO and Mn3O4 through ball grinding for mixing, pre-calcining at 700-1100 deg.C, maintaining the temp for 1-4 hr, crushing, ball grinding, sieving, deposition, baking, adding polyvinyl alcohol solution and zinc stearate, stirring, die pressing and sintering at 90-1300 deg.C. Its advantage is excellent magnetic performance.

The invention relates to the technical field of protective films and particularly relates to a self-adhesive EVA (Ethylene-Vinyl Acetate) protective film and a manufacturing process thereof. The self-adhesive EVA protective film is formed by a film which is coextruded and adhered by a base film layer, a middle layer and a self-adhesive layer. Especially, due to the self-adhesive layer, adhesive force of the EVA self-adhesive protective film is moderate, so that the self-adhesive EVA protective film is easily stuck and torn; after the film is stuck, the change of the adhesive force along with the time is small, the self-adhesive EVA protective film can be stuck repeatedly without adhesive failure and residual foreign matters, and can be used in special and large-corner surfaces with a radian and without upwarping; since the specific material combination of the base film layer, the middle layer and the self-adhesive layer is adopted, the impact resistance is also greatly improved; the manufacturing process of the self-adhesive EVA protective film is low in cost and is simple.

A paste resin for producing PVC gloves and its production are disclosed. The process is carried out by making chlorethylene monomer under emulsifier system-surface activator protection, dispersing materials into water to become 1-2mum fine grain by disperser, polymerization reacting at 40-60degree under action of composite initiating agent to generate polymer latex with average grain diameter 1-2mum, and spray drying by latex to obtain the final product. It is stable, has no fluid, and has proper yield value and better tensile strength.

To provide a prepreg and a carbon fiber reinforced composite material that are excellent in adhesion between a matrix resin and carbon fibers and long-term storage stability and also excellent in microcrack resistance due to the increased toughness. The present invention provides a prepreg that includes; agent-coated carbon fibers coated with a sizing agent; and a thermosetting resin composition impregnated into the sizing agent-coated carbon fibers. The sizing agent includes an aliphatic epoxy compound (A) and an aromatic epoxy compound (B1). The sizing agent-coated carbon fibers are in a shape of woven fabric or braid. The thermosetting resin composition includes a thermosetting resin (D), a thermoplastic resin (F), and a latent hardener (G). The sizing agent-coated carbon fibers have an (a)/(b) ratio in a certain range where (a) is the height of a component at a binding energy assigned to CHx, C-C, and C=C and (b) is the height of a component at a binding energy assigned to C-O in a C 1s core spectrum of the surfaces of the sizing agent-coated carbon fibers analyzed by X-ray photoelectron spectroscopy.

The technique subject of the invention is to provide a kind of voltage-controlled oscillator, which has very large variable frequency range, high frequency-stability, low phase noise, very little change after a long period, ultra-small type, and the capability of simultaneously performing oscillation operations of plural frequencies. The film bulk acoustic resonator uses the single crystal ferroelectric, which has the same pole direction as the film thickness direction and a thickness smaller than 10 mum, as the piezoelectric body. By changing the voltage added to the electrode, a voltage-controlled oscillator having a large oscillation frequency variation rate larger than 0.01%/V and very small phase noise is provided.

Disclosed is a resin composition for forming an adhesive for temporary surface protection which has adequate release strength and releasability which does not change over time, while leaving no contamination on the object from which it is separated. This resin composition has a reduced curing time. Also disclosed is an adhesive for temporary surface protection which uses such a resin composition. Specifically disclosed is a resin composition for forming an adhesive for temporary surface protection through irradiation of an active energy ray, which contains a resin component and a photopolymerization initiator without containing a polymerizable monomer or a polymerizable oligomer. In this resin composition, the resin component is composed substantially only of an acrylic resin (A) containing no ethylenically unsaturated group. Also specifically disclosed is an adhesive for temporary surface protection which substantially contains only an acrylic resin (A) containing no ethylenically unsaturated group and is obtained by being irradiated with an active energy ray. Further specifically disclosed is an adhesive for temporary surface protection which is obtained by irradiating an acrylic resin composition [I] mainly containing an acrylic resin (A), which contains no ethylenically unsaturated group, with an active energy ray.

The invention provides a closed type battery having no electrolyte leakage, etc. and improved airtightness, which comprises a battery header in which an electrode-drawing sheet of polarity opposite to that of a battery can is fixed by caulking to an insulating member fitted into a through-hole in a metal sheet while an electrode-leading pin remains inserted into the through-hole. An internal insulating sheet mounted on the surface of the metal sheet of the battery header located inside the battery can comes into contact at two or more surfaces with an external insulating sheet mounted on a surface of the metal sheet of the battery header located outside the battery can.

The invention provides an additive capable of improving the water-retention rate and the operation time of a wet-mixed masonry mortar, a plastering mortar or a floor mortar in the building field. The additive comprises a component A and a component B, wherein the component A is prepared from the following components in percentage by weight: 1 to 1.5 percent of water-retaining agent, 0.1 to 0.5 percent of air entraining agent, 2 to 5 percent of water reducing agent, 2 to 4 percent of early strength agent, 1 to 5 percent of coagulant, and the balance of water through mixing and stirring; the component B is prepared from the following components in percentage by weight: 5 to 20 percent of sodium gluconate, 2 to 10 percent of saccharose, 1 to 6 percent of borax,and the balance of water through mixing and stirring; the water-retaining agent is methyl hydroxyethyl cellulose ether with the viscosity being 10000 to 20000mpas; the air entraining agent is one or two of sodium alpha-olefin sulfonate or fatty alcohol-polyoxyethylene ether sodium sulfate. The additive provided by the invention is reasonable in formula and convenient to use, can enable the wet-mixed mortar to have a better water-retaining property at high temperature when being added into the wet-mixed mortar, and has better storage stability. The invention also provides a preparation method of the additive.

The invention provides new biomolecule immobilized substrate and biochip which use hydrophilic monomolecular film and lipid bilayer to immobilize biomolecule on a chip substrate. On the transparent chip substrate 21, metal layer 22 consisting of Au particulate is formed. Further on it, monomolecular film 23 consisting of X-(CH2)n-OH (X:thiol group) is formed utilizing self assembly. On the monomolecular film 23, lipid bilayer 24 consisting of phospholipid is formed utilizing self assembly. Both the monomolecular film 23 and the lipid bilayer 24 are rather flexibly combined by hydrogen bond. On this lipid bilayer 24, receptor 28 is immobilized through biosensing molecule 27.

The invention relates to a medium-viscosity protective film emulsion and a preparation method thereof. The emulsion comprises the following components: acrylate monomers, functional monomers, an emulsifier, an initiator, a neutralizer and deionized water, preferably, methyl methacrylate is used as a hard monomer; butyl acrylate and 2-ethylhexyl acrylate are used as soft monomers, although the dosage of the functional monomers is small, by addition of the functional monomers for polymerization with the soft and hard monomers, the prepared acrylate emulsion polymer contains certain functional groups with high polarity, so that cohesion and bonding performance of the adhesive can be obviously improved. A pre-emulsification seed polymerization process is adopted, so that the water resistance is excellent, the fitness is excellent, and the time-dependent change of the flitch is small. The stripping force of the protective film prepared by the product is increased by not more than 10% afterhalf a year, and the protective film is easy to strip off when being removed without polluting the surface of the base material.

The invention provides a transparent mortar mixture simulating a rheological property of cement mortar and a preparation method of the transparent mortar mixture. The mixture comprises the following components by weight percentage: 92.41-94.50% of deionized water, 0.30-0.35% of carbomer 940 powder, 0.20-0.24% of neutral regulator triethanolamine and 5-7% of transparent glass bead. The transparent mortar mixture simulates the rheological property of the cement mortar at a water cement ratio of 0.45-0.5 and a sand cement ratio of 1:1. The preparation method of the mixture comprises the steps of adding the carbomer powder into the deionized water, after complete dissolution, dropwise adding triethanolamine, after uniformly stirring, standing for 5-10min, obtaining transparent carbomer gel, and then uniformly stirring after adding the transparent glass bead. The transparent mortar mixture serves as a simulating medium of the cement mortar, is low in cost, simple to prepare, good in transparency, small in thixotropy and small in rheological parameter ongoing change, and has an obvious pseudoplastic characteristic.

The invention discloses a dispersion stabilizer. The dispersion stabilizer comprises compound, and the compound is prepared by an acid-base neutralization reaction of a neutralizer and a block copolymer formed by linking an unsaturated carboxylic acid, an unsaturated sulfonic acid and an unsaturated phosphate end to end. The molecular chain of the compound contains a carboxyl group, a sulfonic group and a phosphate group, the compound is a copolymerized polymer electrolyte, and the molecular weight distribution of the compound belongs to a bimodal structure, so the dispersant is multifunctional, that is the mechanical stability of the dispersant is improved, the grinding efficiency is increased, and the viscosity stability of a ground slurry is improved; and the acid-base neutralization reaction makes the compound have a plurality of valence ions, such as a plurality of valence metal cations, and the plurality of valence compounds are combined to form the polymer electrolyte with further optimized properties, such as mechanical stability and viscosity stability of the slurry.

The invention provides a carbomer gel medium for simulating rheological property of cement paste and a preparation method thereof. The carbomer gel medium for simulating rheological property of cement paste comprises the following components by weight percent: 99.70-99.75 percent of deionized water, 0.15-0.18 percent of carbomer resin powder and 0.10-0.12 percent of triethanolamine (serving as a neutral regulator), wherein the water cement ratio in the carbomer gel medium for simulating rheological property of cement paste is 0.45-0.5. The preparation method comprises the following steps: adding the carbomer resin powder into the deionized water, dripping the triethanolamine after the powder is completely dissolved, uniformly stirring, standing for 5-10 minutes so as to obtain transparent carbomer gel. The 940 series of carbomer gel serves as a simulation medium of the cement paste, and the carbomer gel medium is low in cost, simple to prepare, high in transparency, low in thixotropy, small in time-dependent behavior of rheological parameters and obvious in pseudoplastic characteristics.