51results about How to "Increased cross-linking rate" patented technology

The invention discloses an ethylene-vinyl acetate copolymer packaging thin film, which is used for packaging solar cell components. The thin film is prepared from the following raw materials in part by weight: 100 parts of an ethylene-vinyl acetate copolymer, 0.1 to 2.0 parts of crosslinking agent, 0.1 to 10.0 parts of aid crosslinking agent and a proper amount of aid. The ethylene-vinyl acetate copolymer contains 25 to 33 percent of vinylacetate, and the ratio of the amount of the aid crosslinking agent and the crosslinking agent is 1:10 to 10:1. In the invention, the introduction of the aid improves the network structure of crosslinked resin, improves crosslinking efficiency, greatly reduces the dosage and residue of the crosslinking agent greatly and avoids aging phenomenon caused by residual crosslinking agent, and the prepared thin film has higher dampness and heat resistance, high ultraviolet resistance, high thermal-oxidative aging resistance and the like and has long service life.

The invention relates to recombinant collagen injectable hydrogel and a preparation method thereof, and aims to solve the problems that materials such as animal collagen and sodium hyaluronate and thelike used in the field of soft tissue filling at present still have rejection problems such as chronic inflammation and allergy and the like although having good effects, and the cross-linking agentsused are mostly chemical cross-linking agents, such as 1, 4-butanediol diglycidyl ether, beta-sodium glycerophosphate, and the like. If the residual amount of the cross-linking agent exceeds a limitvalue, toxicity is generated to a human body. In order to solve the problems of the existing hydrogel material, the recombinant collagen injectable hydrogel is constructed, the recombinant collagen isselected as a hydrogel main body, and enzyme is used as a catalyst. Compared with the traditional hydrogel, the hydrogel prepared by the invention has excellent biocompatibility, can be molded in situ and has the effects of promoting cell growth and resisting inflammation.

It is an object of the present invention to provide an olefin thermoplastic elastomer composition which, through dynamic crosslinking of an olefin resin and an ethylene-α-olefin copolymer rubber as polymer components, has excellent appearance of the extrusion molding while also having excellent physical properties such as compression set and tensile strength. The present invention is directed to a method for producing a thermoplastic elastomer composition having the steps of: dynamically heat treating the following components (A) to (D); adding a component (E) to a resulting composition; and kneading the resulting mixture, and a thermoplastic elastomer composition obtained by the production method,(A): 40 to 95 parts by weight of an ethylene-α-olefin-based copolymer rubber;(B): 5 to 60 parts by weight of a polyolefin-based resin;(C): 0.1 to 20 parts by weight of a halogenated alkylphenolic resin-based crosslinking agent;(D): 0.001 to 0.7 part by weight of iron oxide; and(E): 0.1 to 20 parts by weight of a halogen capturing agent.

An optical fiber having at least one epoxidized polyolefin based polymer coating. The coating is formed from a crosslinkable composition having (a) at least one epoxidized polydiene oligomer having a first and a second end, the oligomer having at least one hydrocarbon chain that is substantially free of ethylenic double bonds, at least one epoxide group at the first end and at least one reactive functional group at the second end; (b) at least one hydrogenated polydiene oligomer having at least one reactive functional group capable of reacting with the epoxide groups; and (c) at least one photo-initiator. Preferably, the coating is a primary coating coated with a secondary coating.

There is provided a technique of forming an insulating film containing silicon oxide. A coating solution containing polysilazane is applied onto a wafer W, the solvent of the coating solution is volatilized, and the coating film is irradiated with ultraviolet rays in nitrogen atmosphere before performing a curing process. Dangling bonds are generated in silicon which is a pre-hydrolyzed site in polysilazane. Therefore, the energy for hydrolysis is reduced, and unhydrolyzed sites are reduced even when the temperature of the curing process is 350° C. Since efficient dehydration condensation occurs, the crosslinking rate is improved, and a dense (good-quality) insulation film is formed. By forming a protective film on the surface of the coating film to which ultraviolet rays irradiated, the reaction of dangling bonds prior to the curing process is suppressed.

An optical fiber having at least one epoxidized polyolefin based polymer coating. The coating is formed from a crosslinkable composition having (a) at least one epoxidized polydiene oligomer having a first and a second end, the oligomer having at least one hydrocarbon chain that is substantially free of ethylenic double bonds, at least one epoxide group at the first end and at least one reactive functional group at the second end; (b) at least one hydrogenated polydiene oligomer having at least one reactive functional group capable of reacting with the epoxide groups; and (c) at least one photo-initiator. Preferably, the coating is a primary coating coated with a secondary coating.

The invention relates to a high-dielectric constant epoxy resin composition. The high-dielectric constant epoxy resin composition is characterized by being composed of main components of epoxy resin, curing agent, curing agent promoter, high-dielectric constant filler, stress absorbing agent and fumed silica, wherein the epoxy resin contains either of the following formulas of (1) and / or (2); the curing agent is phenolic resin and contains a formula of (3); the weight percentage of the epoxy resin in the high-dielectric constant epoxy resin composition is 1-25%, preferably, 2-18%; the weight percentage of the curing agent in the high-dielectric constant epoxy resin composition is 0.01-2%, preferably, 0.05-1%. The invention also discloses a preparation method of the high-dielectric constant epoxy resin composition. By optimizing the type of the epoxy resin composition, the type of phenolic resin composition and the type and the adding method of the stress absorbing agent, the invention provides the high-dielectric constant epoxy resin composition, which is low in porosity, capable of ensuring die mark to be within an acceptable range, low in warpage and high in reliability.

The invention relates to SBS modified asphalt concrete and a preparation method thereof, and relates to the technical field of pavement paving materials. The SBS modified asphalt concrete comprises the following components by weight: 300-500 parts of coarse and fine aggregate, 15-30 parts of asphalt, 1.5-3.5 parts of SBS and 0.5-1.5 parts of cross-linking agent particles, wherein the cross-linkingagent particles comprise the following components in parts by weight: 65-85 parts of liquid coumarone resin, 15-25 parts of sulfur, 5-10 parts of trichloromethane and 1-2 parts of an organic tin stabilizer; the preparation method comprises the following steps: S1, preheating asphalt, and heating the asphalt to a softened state; S2, adding SBS into the asphalt treated in the step S1, uniformly stirring the SBS and the asphalt, and modifying the asphalt to obtain SBS modified asphalt; S3, adding the coarse and fine aggregates and the cross-linking agent particles into the SBS modified asphalt,and uniformly stirring the mixture at the rotating speed of 40r / min to obtain a finished product. The prepared concrete has good stability, and the problem of poor stability in the prior art is solved.

The invention discloses a stabilizer, in particular to a stabilizer used for SBS modified asphalt and a preparation method thereof; the stabilizer is prepared from the following raw materials according to the parts by weight: 0.5-5 parts of sulfur, 0.2-5 parts of aromatic heterocyclic multifunctional olefin monomers and 90-100 parts of aromatic heavy oils. The invention adopts sulfur as main reactant and aromatic heavy oils as dispersant; the reactant and the reaction promoter can be dissolved in the dispersant to promote the uniform mixing between the reactant and a reaction promoter, increase the uniformity of the reaction of the stabilizer and substrate asphalt and avoid the agglomerate phenomenon caused by locally over crosslinking; the heterocyclic multifunctional olefin monomers areused as the reaction promoter so as to increase the reaction efficiency of the main reactant and the crosslink rate. The invention solves the problems well that SBS is easy to separate from the substrate asphalt and the storage is not stable in the production process of SBS polymer modified asphalt.

The invention relates to a high-dielectric constant epoxy resin composition. The high-dielectric constant epoxy resin composition is characterized by being composed of main components of epoxy resin, curing agent, curing agent promoter, high-dielectric constant filler, stress absorbing agent and fumed silica, wherein the epoxy resin contains either of the following formulas of (1) and / or (2); the curing agent is phenolic resin and contains a formula of (3); the weight percentage of the epoxy resin in the high-dielectric constant epoxy resin composition is 1-25%, preferably, 2-18%; the weight percentage of the curing agent in the high-dielectric constant epoxy resin composition is 0.01-2%, preferably, 0.05-1%. The invention also discloses a preparation method of the high-dielectric constant epoxy resin composition. By optimizing the type of the epoxy resin composition, the type of phenolic resin composition and the type and the adding method of the stress absorbing agent, the invention provides the high-dielectric constant epoxy resin composition, which is low in porosity, capable of ensuring die mark to be within an acceptable range, low in warpage and high in reliability.

The present invention relates to a cable including at least one elongated conductor surrounded by at least one cross-linked layer, said layer being obtained from a polymer composition comprising a polymer, a crosslinking agent, and an amine as co-crosslinking agent, wherein said amine has a nucleophilic value (N) of 14 or more.

The invention discloses a crosslinked polyvinyl chloride material and a preparation method thereof. The crosslinked PVC material is prepared from the following raw materials in parts by weight: 100 parts of PVC, 1-3 parts of a crosslinking agent, 5-20 parts of an acid acceptor, 2-5 parts of a stabilizer, 5-45 parts of a plasticizer and 0.2-1.5 parts of a lubricant. The preparation method comprisesthe following steps: putting the materials into a high-speed stirrer, stirring at a high speed for 10-15 minutes to uniformly mix all materials, carrying out melt blending on the mixture in a double-roller plastic mixing mill, discharging sheets, carrying out vulcanization molding in a press vulcanizer, transferring into a plate cold press, shaping, and finally cutting as required. By using the novel cross-linking agent, the cross-linking rate can be increased, the cross-linking degree can be improved, high cross-linking density can be achieved in a short time, time can be saved, and the efficiency can be improved. The obtained material is excellent in mechanical property, the heat resistance is obviously improved, and the use requirements of various materials can be met at a high temperature.

The present invention relates to polyethylene having a high degree of cross-linking, and a cross-linked polyethylene pipe comprising the same. The polyethylene according to the present invention has an ultra-high molecular weight so as to have increased cross-linking speed, thereby exhibiting a sufficient degree of cross-linking even when cross-linking time is short, and thus exhibiting the excellent strength and pressure resistance.

The invention provides a high-strength flashover preventing aluminum alloy for electric power fittings and a preparation method of the high-strength flashover preventing aluminum alloy. The high-strength flashover preventing aluminum alloy is prepared from the following compositions in parts by weight: 50-70 parts of aluminum alloy ingots, 4-6 parts of nano-titanium dioxide, 2-4 parts of sepiolitefibers, 2.5-3 parts of acetylene carbon black, 1-4 parts of nitride micro powder, and further comprises 0-2 parts of chromium ore, 0-3 parts of activated zinc oxide, 0-3 pars of rare earth oxide, and0.05-0.2 part of a foaming agent. According to the high-strength flashover preventing aluminum alloy for the electric power fittings and the preparation method of the high-strength flashover preventing aluminum alloy, the microstructure of the aluminum alloy is reasonably optimized through reasonable raw material selection and process improvement; by doping and combining with additional ingredients, excellent mechanical performance and flashover preventing performance are achieved, weather resistance, corrosion resistance and the like are also significantly improved, and comprehensive performance is improved remarkably.

A technology for manufacturing a writable touch film is disclosed. The UV printing material is obtained by the following steps: step 1, putting the aliphatic polyurethane triacrylate, 1, 6 hexanedioldiacrylate, ethylene glycol diglycidyl ether, castor oil polyglycidyl ether and alkyl modified organosiloxane into a stirring and dispersing machine for mixing to obtain the material 1; 2, adding theweight parts of the hydroxymethyl butyl ester, the organic thermoset polymethylurea resin, 4- Acryloylmorpholine, 2-Hydroxyl-2-Methyl-1-Phenyl-1-Acetone, sulfonyloxy ketone and coloring pigment, further mixing to obtain material 2; Step 3, the material 2 obtained in the step 2 is sent to a bead mill for grinding until the particle size is 300-400nm, and UV printing material is obtained. The invention can write the manufacturing process of the touch film, and the prepared UV printing layer has high printing accuracy, high curing hardness and scratch resistance.

Focused acoustic treatment of samples including a target biomolecule, such as cfDNA, may aid in the recovery of the biomolecule from a sample. cfDNA in a sample, whether chemically stabilized or not, may be linked or otherwise bound to histones or other proteins, e.g., by hydrogen bonds of histones or chaperone proteins to DNA and / or covalent crosslinks of such proteins to the DNA. Focused acoustic energy may remove or disrupt such links, aiding in isolation of the cfDNA from the sample.

The invention discloses a photocureable coating for teaching blackboards, which is composed of the following components: aliphatic polyurethane triacrylate, 1, 6-hexanediol diacrylate, ethylene glycol diglycidyl ether, alkyl modified organosiloxane, butyl hydroxytoluene, organic thermosetting polymethylurea resin, 4-acryloyl morpholine, 2-hydroxy-2-methyl-1-phenyl-1-acetone, sulfonyloxy ketone, Pigment BK7 and castor oil polyglycidyl ether. According to the photocureable coating for the teaching blackboard, the oxygen inhibition phenomenon of the photocureable coating is effectively avoided, the printing precision is high, and the photocureable coating for the teaching blackboard is high in curing hardness, high in adhesive force to a base material and resistant to scraping.

The invention discloses a coating material for wear-resistant teaching blackboards, and a preparation method of the coating material. The coating material for the wear-resistant teaching blackboards is prepared from the following components: aliphatic polyurethane triacrylate, 1, 6 hexanediol diacrylate, ethylene glycol diglycidyl ether, alkyl modified polysiloxane, 2-methyl methacrylate, hydroxyltoluene butyl ester, organic thermosetting polymethyl urea resin, 4-acryloyl morpholine, sulfonyloxy ketone, 2-hydroxy-2-methyl-1-phenyl-1-acetone and Pigment BK7. The invention provides the coatingmaterial for the wear-resistant teaching blackboards and the preparation method of the coating material; the coating material is rapid in curing speed and strong in adhesion to a base material; secondly, the viscosity between the components of the coating material can be reduced, the inkjet smooth printing is facilitated, a spray nozzle is not easily blocked, and the yield is high; furthermore, the viscosity and surface tension of the coating material containing the Pigment BK7 are reduced, and the stability is good.

The invention discloses aziridine crosslinked and solidified acrylate resin two-component water-based automobile coating and a preparation method thereof. Water-dispersed acrylate resin used for preparing the two-component water-based coating is prepared by initiating polymerization by virtue of a free radial initiator in an organic cosolvent by a mixture of a monomer component A, a monomer component B and a monomer component C, and then an amine neutralizer is added for neutralization to form aqueous dispersion. The aziridine crosslinked acrylate resin two-component water-based automobile coating is formed by mixing water-dispersed acrylate resin, an aziridine crosslinking agent and other auxiliaries, a paint film formed after spraying and solidification has high gloss, high hardness, high impact resistance and excellent water resistance, interlayer bonding is tight, firm adhesion on a substrate is achieved, and operating requirements of automobile coating are met.