205results about How to "No effect on mechanical properties" patented technology

A composition of porous material and gel for preparing artificial bone is prepared from collagen and porous material chosen from alpha-tricalcium phosphate/hydroxy apatite, beta-tricalcium phosphate/hydroxy apatite-coral, calcium phosphate/hydroxy apatite, calcium carbonatel tricalcium phosphate, etc.

The present invention relates to a hole for the medicine elution apparatus and a polymer carrying medicine releasing structure and the preparing method thereof. The invention includes an apparatus body which is arranged with large numbers of holes, the large number of holes are nano-scale holes with single dimension or double dimensions of a plurality of dimensions, namely n nano-scale holes with equal dimension arrangement or two or more asymmetrical dimension arrangement with the statistical average value including the pore diameter of pore depth, the holes are structure of medicine-carrying groove or pore, and the apparatus body includes or not includes an outermost membrane layer, the mixture of medicine and polymer exists in the hole and the mixture adheres to the surface of the apparatus body; the carrier carrying the medicine is no longer the simple hole or polymer, the holes and a few polymers commonly supports the active medicine and does controlled-releasing to the medicine, facilitates that the medicine has a strong adsorbability and a good controlled-releasing effect, as the content of the polymer is small the invention has the advantages of reducing the risk formed by the long-period thrombus and safer using and better treating effect.

The invention discloses a low-temperature-resistance flame-retardant photodiffusion polycarbonate composite material and a preparation method thereof. The polycarbonate composite material comprises the following components in parts by weight: 400-900 parts of polycarbonate resin, 100-500 parts of organosilicone copolymer PC (polycarbonate) resin, 0.5-20 parts of sulfonate flame retardant, 1-20 parts of photo-diffusant, and 5-50 parts of an auxiliary. The preparation method comprises the following steps: uniformly mixing polycarbonate resin, organosilicone copolymer PC resin, a sulfonate flame retardant, a photo-diffusant and an auxiliary in a high-speed mixer; putting the mixture in a feed hopper of a double-screw extruder; and melting, extruding and granulating. The low-temperature-resistance flame-retardant photodiffusion polycarbonate composite material prepared by the method can fulfill high light transmittance, high haze of photodiffusion PC, various processing requirements and mechanical performance, has high flame retardance and excellent low temperature performance, and can be applied to various transparent products in the optical field, in particular applicable to products applied in a rigorous environment.

The invention provides a method for manufacturing a silver-plated conductive fiber. The method comprises the following steps of: a, performing plasma treatment on a fiber base material by using gas, and controlling discharge power of plasma to be 30 to 500W, vacuum air pressure to be 20 to 300 Pa, and the movement speed of the base material to be 0.5 to 50 m/min; b, placing the fiber base material which is subjected to plasma treatment in 20 to 500 g/L silver nitrate solution, and soaking for 5 to 60 minutes with stirring; c, performing plasma treatment on the fiber base material which is treated by the silver nitrate solution by using reduction gas, controlling the ion discharge power to be 30 to 500 W, vacuum air pressure to be 20 to 300 Pa and the movement speed of the base material to be 0.5 to 50 m/min, and reducing to form a silver-plated film; or controlling the movement speed of the fiber base material which is treated by the silver nitrate solution to be 0.5 to 50 m/min in a reduction gas furnace at the temperature of between 20 and 150 DEG C and under the air pressure of 20 to 300 Pa, and reducing to form the silver-plated film.

The invention relates to a hyperbranched poly (ether ketone), a preparation method thereof and application of the material in viscosity modifiers. The hyperbranched poly(ether ketone) is prepared wit BB2-type monomers 2, 4, 6 trifluoro phenyl ketone and A2-type monomers hydroquinone, resorcin, bisphenol A, and hexafluoro-bisphenol A or biphenyl diphenol as reactants, potassium carbonate or sodium carbonate or the mixture of the potassium carbonate and the sodium carbonate as a salification agent, and sulfolane or N, N-dimethyl ketopyrrolidine as a solvent through mixing, salification, polycondensation reaction and after treatment. The solid content is 20 to 30 percent; the dosage of the salification agent is 1 to 1.1 time of the dosage of the A2 monomers. Fluorine terminated hyperbranched polyaryletherketone and hydroxy terminated superbranched polyaryletherketone are got respectively by adjusting the ratio of the dosages of the BB2-type and A2-type monomers. The hyperbranched poly (ether ketone) is characterized in that by adding the superbranched polyaryletherketone, the mechanical property and the thermostability of linear polyaryletherketone are not reduced while the melt viscosity of the linear polyaryletherketone is reduced.

The invention discloses a method for synthesizing reactive halogen-free flame-retardant unsaturated polyester resin. The method is characterized by taking dihydric alcohol, dibasic acid or dibasic acid anhydride, reactive phosphorus flame retardants such as 2- carboxyethyl (phenyl) phosphinic acid and phenyl hydroxymethyl phosphinic acid, and reactive silicon flame retardants such as dihydroxy diphenyl silane and dihydroxy dimethyl silane as basic materials, conducting esterification and polycondensation under the conditions of catalysts such as dibutyltin oxide and sodium acetate, and then adding diluent, thus preparing the halogen-free flame-retardant unsaturated polyester resin. The resin prepared by the method is especially applicable to the production of unsaturated polyester resin moulding compounds, glass fiber reinforced plastics and electrical plastic products, can meet the requirements of products on flame retarding and lightweight and has good properties.

The invention discloses a drain-type pipe piece for tunnel lining. The drain-type pipe piece comprises a reinforced concrete pipe piece (1), a slurry injection hole (or a hoist hole) (1a) in the pipe piece (1), a load bearing steel bar (1b), and a concrete protective layer (1c) on the outer side; a water stop rubber block (2) capable of being expanded when being in contact with water is preburied in the concrete protective layer (1c) right opposite to one or two slurry injection holes (1a) of the pipe piece (1); a self-advancing type hollow anchor rod (3) is inserted in the slurry injection holes (or the hoist hole) (1a) of the pipe piece (1), then penetrates the water stop rubber block (2), and shoots out of the concrete protective layer (1c); and drain holes (3a) are formed in the rod wall of the outer end of the self-advancing type hollow anchor rod (3), and a filter column (4) used for filtering sand is plugged in the inner cavity of the self-advancing type hollow anchor rod (3). Lining built with the pipe pieces has a reliable drain function, and can reduce water pressure around the structure to ensure tunnel safety; and construction is convenient, small damage is caused to the pipe piece lining structure, and construction cost of the pipe piece lining is low.

The heat temperature resistant paint for iron and steel is prepared with ethyl borate 20-25 weight portions, silicone resin 15-25 weight portions, 5-10 wt% concentration polyvinyl butyal solution 5-10 weight portions, aluminum powder 15-20 weight portions, solvent 10-20 weight portions, and dispersant 1-2 weight portions. The present invention has three kinds of matter, including boric oxide, silicone resin and alumnia layer with reactive protection, melt film shielding protection and redox protection at high temperature separately combined, so that the paint has excellent high temperature iron and steel protecting function and capacity of reducing surface scale generating amount.

The invention discloses a quaternary phosphonium salt pillared layered zirconium phosphate material, and a preparation method and an application thereof. The chemical formula of the quaternary phosphonium salt pillared layered zirconium phosphate material is as follows, R is methyl, butyl, phenyl or alkane with the length of a carbon chain of 8-20; X is Cl or Br; and m is 1, and n is 0.00288-0.174462. The preparation method comprises the steps of utilizing methylamine to prop up an interlayer spacing interval of zirconium phosphate, obtaining a methylamine-zirconium phosphate precursor, then adding a quaternary phosphonium salt into the methylamine-zirconium phosphate precursor for continuously carrying out reaction for a certain time, replacing the methylamine in the precursor and obtaining the quaternary phosphonium salt pillared layered zirconium phosphate material with white or light gray external appearance, and the quaternary phosphonium salt pillared layered zirconium phosphate material can be added into plastics, rubber, fibers, coatings, adhesives, paper and other materials for preparing an antibacterial or flame-retardant functional material, and be also used for removing algae in water and governing large-area red tide and water blooms in fresh water.

The invention discloses an extrusion-type backing plate for a photovoltaic cell. The backing plate comprises an upper surface layer, a core layer and a lower surface layer, wherein the upper surface layer is composed of polyamide resin, filler, a flame retardant and additives, the core layer is composed of polypropylene resin and grafted polyethylene modified polyamide resin, filler, flame retardant and additives, the lower surface layer is composed of polyamide resin, flame retardant, a coupling agent and additives, the flame retardant is composed of a nanoscale inorganic flame retardant subjected to surface treatment and red phosphorus, the nanoscale inorganic flame retardant is selected from aluminum hydroxide and/or magnesium hydroxide of 10-100 nm, and a used surface treating agent is ethylene-based polyhedral oligomeric silsesquioxane of 1-5 nm. The extrusion-type backing plate is good in flame-retardant effect which reaches the A level through combustion tests, and it can be guaranteed that the flame retardant has no influence on the mechanical property, aging-resistant property, waterproof property, insulating property and the like of the extrusion-type backing plate.

The invention provides an adhesion promoter of an optical fiber coating, which comprises a compound represented by a formula I in the specification, wherein R1 is a methyl or an ethyl; R2 is a diisocyanate cyclic trimer group; R3 is an acrylic ester group; m and n are the numbers of repeated units, m is not less than 1 and not more than 30, n is not less than 1 and not more than 50; and X is -S-, -NH-. The adhesion promoter can be well aqueously dispersed in an aqueous ultraviolet curable coating, and has polymerization activity, so that the polymerization speed of the optical fiber coating is promoted, and the adhesion of the cured coating on an optical fiber substrate is improved. The invention also provides a preparation method of the adhesion promoter of the optical fiber coating, which comprises the step of synthesizing the adhesion promoter by using raw materials of polyethylene glycol monomethyl ether, diisocyanate cyclic trimer, siloxane and the like. All the raw materials are aqueous compounds, thus the environment is protected, the synthesis conditions are mild, and the operation is easy.

The invention discloses a composition for processing a polystyrene porous material, a polystyrene porous material and a preparation method thereof. The composition comprises the following components in percentage by weight: 65-88% of polystyrene, 7-30% of conductive filler and 0.1-5% of assistant, wherein the assistant at least comprises antioxidant. The porous material can be subjected to extrusion molding or injection molding by an extruder or other corresponding apparatuses, and has the advantages of permanent antistatic performance, electric conduction and low cost. Compared with the traditional material, the porous material disclosed by the invention can lower the cost by about 20% on the premise of keeping the volume resistivity and surface resistivity.

The invention relates to a biologic polypeptide medicine blood vessel support and a preparation method thereof. The biologic polypeptide medicine blood vessel support comprises a support body and active medicines. The support body which is medical material with pores and good biocompatibility is made from stainless steel, cobalt-base alloy, titanium alloy, nickel-titanium alloy or polylactic acid biopolymer; the active medicines comprise a biologic polypeptide medicine and a smooth muscle cell proliferation inhibition medicine. The support is characterized in that: the support body with the pores has the biologic polypeptide medicine fixed on the internal surface of the body and the smooth muscle cell proliferation inhibition medicine coated on the external surface of the body. The preparation me(3) carrying out the after-treatment of the surface of the support body; (4) preparing the medicines; (5) coating the external surface; (6) fixing the medicine onto the internal surface; (7) carrying out the process step of low temperature drying. The support can selectively absorb endothelium progenitor cells which quickly differentiate into endothelium cells to promote the restoration of the endothelium after the support is built in; the support can also effectively inhibit the proliferation and migration of vascular smooth muscle cells, persistently and effectively reduce the formation of a new inner membrane, effectively prevent restenosis inside the support, and avoid the risk of potentially fatal late thrombosis.

The invention relates to the field of modified polypropylene fibers, in particular to a modified polypropylene fiber and a preparing method. The preparing method includes the steps that graphene oxideand sulfydryl alkylamine react, and sulfydryl-modified graphene oxide is obtained; the sulfydryl-modified graphene oxide and vinyl POSS are subjected to a sulfydryl-alkene click chemical reaction, and vinyl-POSS-modified graphene oxide is obtained; the vinyl-POSS-modified graphene oxide and alkyl sulfhydryl are subjected to a sulfydryl-alkene click chemical reaction, then the graphene oxide is reduced, and a POSS/graphene composite material is obtained; the POSS/graphene composite material is added into polypropylene granules, melting granulation is conducted, and modified polypropylene master granules are obtained; the modified polypropylene master granules and polypropylene granules are subjected to melt spinning, and the modified polypropylene fiber is obtained. The modified polypropylene fiber obtained with the method has the good conductivity, thermal conductivity, fire resistance and mechanical property, and can be applied to spinning.

The invention discloses coloring master batches for polyethylene and a preparation method thereof. The coloring master batches for polyethylene disclosed by the invention comprise the following components in percentage by mass: 70%-90% of pigment, 10%-20% of polyethylene resin, 3%-5% of dispersant, 0.1%-1% of antioxidant and 0.1%-1% of antistatic agent. Compared with the prior art, the coloring master batches for polyethylene have the beneficial effects that the prepared coloring master batches for polyethylene are applied to coloring of polyethylene products, have the characteristics of good dispersibility, uniform coloring, high concentration, little dosage and no influence on the mechanical property of the polyethylene products, and are low in cost, easy to color, convenient to use and capable of saving production time and raw materials and the like.

The present invention relates to a phosphorus-containing flame retardant system polyester after-treatment and preparation and application thereof. The system includes, by weight, 10-60% of a phosphorus-containing flame retardant DOPO, 1-10% of a dispersant, 0.1-3% of a dispersion stabilizer and the balance of water. The phosphorus-containing flame retardant system is obtained by a grinding method, and is used for after-treatment. The phosphorus-containing flame retardant system prepared by the present invention is applied to polyester fabric flame retardant finishing in a way of after-treatment; compared to the of flame retardant complex technique and monomer selection difficulty in copolymerization flame retardation and flame retardant selection difficulty and great impact on the properties of the fibers in blending flame retardation, and the system has the advantages of flexible and convenient processing, simple process, and no effect on the fabric mechanical properties.

The invention relates to a chemical cleaning agent of a superheater heat exchange pipe of a station boiler, which comprises the components by mass percent: 1.0-50.0% of MAC, 0.1-0.5wt% of corrosion inhibitor, 0.05-1.5wt% of reducing agent, 0.05-0.2wt% of surfactant and de-mineralized water, wherein the MAC is a key component, and the other components are auxiliary components. The process condition is to control pH at 1.0-7.0. The cleaning formula has an excellent dissolving and dispersing effect on scale of various superheater heat exchange pipes, and simultaneously can control the material corrosion within a safety range and standard set value. The chemical cleaning agent is suitable for chemical cleaning of superheater heat exchange pipes of various station boilers, boilers and other equipment.

The invention relates to a binder, in particular to a binder for extrusion molding of a hard alloy and a preparation method thereof. The binder is made from the following components by weight percentage: 65-80% of paraffin wax, 10-20% of styrene butadiene rubber, 3-5% of dibutyl phthalate, 3-5% of rapeseed oil, 3-5% of stearic acid, and the rest of organic solvents. The preparation method is as follows: the styrene butadiene rubber is dissolved into the organic solvents at normal temperature to prepare a rubber solution for spare use; the paraffin wax is added to a blender and heated to the temperature of 65-75 DEG C for melting, and then added with the dibutyl phthalate, the rapeseed oil, the stearic acid and the rubber solution and stirred for 2-5min to obtain the binder. The binder has the advantages of available and cheap raw materials, simple preparation process, good degreasing and shape retention properties, short degreasing time, improving the production efficiency and saving the production cost.

Belonging to the field of organic-inorganic hybrid materials, the invention provides a quaternary ammonium cation and quaternary phosphonium cation-containing organic cation modified clay, its preparation method and application. The preparation method comprises: reacting a suspending solution of a sodium base treated clay mineral with quaternary ammonium cations and quaternary phosphonium cations, conducting filtering, washing, drying and crushing, thus obtaining the quaternary ammonium cation and quaternary phosphonium cation-containing organic cation modified clay with a synergistic effect. The organic cation modified clay provided in the invention has good stability, excellent weather resistance, and no toxicity. The organic cation modified clay contains quaternary ammonium cation modified clay and quaternary phosphonium cation modified clay simultaneously, and shows a synergistic antibacterial activity, so that it can be applied to plastics, rubber, fibers, coatings, adhesives, paper, wood-plastic composite materials and a variety of polymer materials to improve the antibacterial property, the flame retardance and the barrier property of polymers, and has no influence on the mechanical properties of the polymers.

The invention relates to a preparation method of a colored polyethylene fiber with ultrahigh relative molecular mass. The preparation method comprises the following steps: mixing dye or pigment powder with a solvent and stirring, while carrying out ultrasonic vibration to obtain uniform dyed bath liquid; (2) extracting and drying UHMWPE (Ultrahigh Molecular Weight Polyethylene) jelly fiber, and winding the fiber to obtain dried UHMWPE jelly fiber; (3) placing the dried UHMWPE jelly fiber to the dyed bath liquid which is obtained in the step (1) to carry out ultrasonic vibration for 10-50 min, taking out and drying the fiber to obtain colored dried UHMWPE jelly fiber; (4) carrying out multistage thermal stretch and winding the colored dried UHMWPE jelly fiber to obtain the colored UHMWPE fiber. The technical process is simple, low in production cost, easy to realize industrial production, wide in selection of dye or pigment powder, will not influence the original excellent mechanical property of the UHMWPE fiber, and is suitable for the fields with the color requirement such as civil use, military use and national defense.

A VOC extractant used for modified polypropylene, and a preparing method and applications thereof are disclosed. The VOC extractant includes 11-50 wt% of a polypropylene carrier and 50-89 wt% of a non-fluorine type nonionic surfactant solution. The non-fluorine type nonionic surfactant solution includes 0.1-2.5 wt% of a non-fluorine type nonionic surfactant and 97.5-99.9 wt% of a solvent. The VOCextractant has characteristics of capabilities of being safe, environmentally friendly, cheap, and the like, and has an extremely high removal rate for VOCs in a modified polypropylene material. In aprocess of preparing the environmentally friendly modified polypropylene material, the VOC extractant is mixed with polypropylene and an auxiliary agent, the mixture is fully stirred by an efficient material mixer, and then the mixture is subjected to twin-screw extrusion and granulation to obtain the environmentally friendly modified polypropylene material.

The invention relates to a nanometer medicinal elution apparatus in microcellular structure for storing and releasing multiple medicines and a preparation method thereof. The multiple medicines in the invention are selected from medicine therapeutic agents, carrier therapeutic genes and bioactive substances, wherein one or two of the medicine therapeutic agents is/are taxol and/or probucol. The preparation method of the medicinal elution apparatus in the invention mainly comprises the followings: 1) nanometer holes are prepared on the surface of the apparatus body; 2) multiple medicines are coated in the nanometer holes and on the surface of the apparatus body. The apparatus body in the invention does not contain polymers, thereby reducing the risk of long-term thrombus possibly caused by polymers; the nanometer holes on the surface of the apparatus body do not have any influence for mechanical property of the body, thereby being capable of efficiently controlling the releasing rate of medicines and obviously reducing the restenosis rate after surgical operations. The invention can be applied to various medicinal elution implanting apparatuses, particularly having good effects for curing vascular lesion and preventing blood vessel restenosis in vascular stents.

The invention discloses a high-light-transmittance optical transparent adhesive for pasting a touch screen and a synthesis method thereof. The raw material formula of the high-light-transmittance optical transparent adhesive comprises, by weight, the following components: 30-50 parts of (meth) alkyl acrylate, 25-40 parts of (meth) hydroxyalkyl acrylate, 1-3 parts of a N-atom-containing polar monomer, 10-20 parts of a crosslinking agent, 0.01-0.02 part of a chain transfer agent and 0.5-1 part of a thermal initiator. The high-light-transmittance optical transparent adhesive is in a pressure-sensitive state after being cured by heat, has the advantages of moderate initial adhesive force, excellent adhesive holding force, no displacement after pasting, and difficulty in falling off, the lighttransmittance is more than 99.5%, the haze value is less than 0.1%, the refractive index is close to a glass refractive index 1.49, and the synthesis method is environment-friendly.