54results about How to "Component raw materials are readily available" patented technology

The invention discloses lead-free low-melting sealing glass and a preparation method thereof. The glass comprises the following raw materials in percentage by mol: 20 to 55 percent of P2O5, 5 to 30 percent of TeO2, 0 to 55 percent of ZnO and additives with the content not more than 30 percent of that of total compositions of the glass. The lead-free low-melting sealing glass has the advantages that the compositions and composition proportioning of the glass are scientific and reasonable, and the compositions do not contain lead which pollutes the environment or poisons human body; meanwhile, the glass is environment-friendly and low toxic and has wide softening temperature and thermal expansion coefficient ranges; therefore, the glass can be used in low-temperature packaging among different electronic components. Moreover, the simple and reasonable preparation method has strong operability and high qualified rate of finished products and is suitable for continuous large-scale industrialized production.

The invention relates to aqueous solution with fine water mist fire extinguishment additive, with the quality percentage of all components as below: ammonium chloride 0 percent to 1 percent, polyvinyl alcohol 0 percent to 1 percent, sodium acetate 0 percent to 0.5 percent, surface active agent 0.01 percent to 0.25 percent, urea 0 percent to 1 percent, rust preventive 0.01 percent to 0.25 percent, and the rest is water. The aqueous solution can improve the fire extinguishing efficiency of the fine water mist and effectively prevent after-combustion of inflamers; has little corrosion to equipments and instruments; basically has no pollution to fire scenes; is high-efficiency, stable and clean; the raw materials of all components are easy to be obtained; has stable performance; is basically nontoxic and low in cost; and has low consumption.

The invention relates to a nano additive as well as a preparation method and application thereof. The chemical structural formula of the nano additive is as shown in the specification, in the formula,n is an oxidation state of a metal element M; n is 2, 3 or 4; Alk is a hydrogen atom or a fat chain, alicyclic hydrocarbon or aromatic compound of which the carbon atom number is 1-18; x is greater than or equal to 0; y is greater than 0; an F-group is a short chain with functional groups, specifically a fat chain, alicyclic hydrocarbon or aromatic compound of which the carbon atom number is 2-50. Compared with the prior art, the nano additive provided by the invention is capable of increasing the elastic modus of a rubber composition when being used for preparing rubber, and in a part of demonstrative application schemes, rubber compositions with the nano additive are very high in slippery sliding resistance, and mostly have increased elastic modus and elongation at break.

The invention discloses phase-change energy-storage three-dimensional fabric concrete canvas which has properties of heat preservation, rapid curing and hardening, flame retardancy, water resistance,wind resistance and the like, and is capable of meeting requirements that a temporary tent is rapidly constructed as a refuge. The phase-change energy-storage three-dimensional fabric concrete canvasdisclosed by the invention is composed of a three-dimensional partitioned fabric and a cement grouting sizing agent, wherein the three-dimensional partitioned fabric is a glass fiber knitted three-dimensional partitioned fabric of which the thickness is 20-30mm; the cement grouting sizing agent is composed of rapidly hardened cement, quartz sand and a phase-change material; by 100 parts of the cement grouting sizing agent, the amount of the rapidly hardened cement in the cement grouting sizing agent is 35-45 parts, the amount of the quartz sand is 45-60 parts, and the amount of the phase-change material is 2-10 parts; the rapidly hardened cement, the quartz sand and the phase-change material can be uniformly mixed and used later when the canvas is used.

The invention discloses a cement-based high-strength geomechanic model test similar material. The cement-based high-strength geomechanic model test similar material has the advantages of easiness in molding, stable mechanical performances and low price. The cement-based high-strength geomechanic model test similar material comprises a component A and a component B, the component A is prepared by mixing, by weight, 2-6 parts of cement, 5 parts of silica fume, 57-65 parts of barite sands and 22-30 parts of barite powder, the component B is composed of water, and a ratio of the use amount of cement mortar in the component A to the use amount of the water in the component B is 100:(8-12). The similar material can be used by uniformly mixing the component A with the component B.

The invention relates to an epoxy resin adhesive for concrete wet surfaces, and solves the problems that an existing epoxy resin adhesive is high in cost, high in brittleness and low in toughness, andvarious properties need to be further improved. The epoxy resin adhesive is prepared by mixing a component A and a component B in a ratio of (2-4):1, wherein the component A comprises the following raw materials in parts by weight: 100 parts of bisphenol A epoxy resin, 5-10 parts of palygorskite powder and 15-25 parts of waste glass powder; the component B comprises the following components in parts by weight: 45-65 parts of a modified amine curing agent, 10-20 parts of monoamine and 4-6 parts of a thixotropic agent. The epoxy resin adhesive is simple in raw material, low in cost, good in flexibility, excellent in hydrophobicity, low in permeability, low in toxicity, excellent in self-drying property and excellent in adhesive property, and is particularly suitable for the concrete wet surfaces.

The invention discloses a transparent rubber pad of a heparin cap for a remaining needle. The transparent rubber pad mainly comprises 100 parts of polyisoprene rubber, 3-10 parts of a thermoplastic elastomer, 1-10 parts of alkali white carbon black and 0.3-1.5 parts of peroxide. The invention also discloses a production method of the transparent rubber pad of the heparin cap for the remaining needle. By using the production method, the problems that the existing transparent rubber pad of the heparin cap for the remaining needle is not high in transparency, the chemical cleanliness of the existing transparent rubber pad needs to be improved, and particularly, the pH change value and the ultraviolet absorbance of the transparent rubber pad easily exceed the standard are solved, the size of each curing burr are controlled within 0.03-0.10mm, and the cured transparent rubber pad of the heparin cap can be directly frozen and deburred; and meanwhile, the surface of a curing mould is treated by using a mirror polishing process, so that the transparent rubber pad of the heparin cap, which is provided with relatively thin curing burrs, is conveniently cured and demoulded. The transparent rubber pad of the heparin cap for the remaining needle, disclosed by the invention, is resistant to multiple punctures, excellent in cleaning performance and compatibility with tube sealing fluid of the heparin cap and low in extractable substance content.

The invention relates to an additive with a functional group double-terminated structure as well as a preparation and application of the additive. The additive has a chemical structural formula as shown in the specification, wherein n is an oxidation state of metal M and is equal to 2, 3 or 4; A is one of oxygen, sulfur, carbon, nitrogen, phosphorus and silicon, and x is larger than or equal to 0and is smaller than or equal to 10; B is one of oxygen, sulfur, carbon, nitrogen, phosphorus and silicon, and y is larger than or equal to 0 and is smaller than or equal to 10; (AxBy)m shows that atoms are connected by chemical bonds, and x and y are not zero at the same time; m is larger than or equal to 0 and is smaller than or equal to 10; z is smaller than or equal to 50; R1 and R2 are aliphatic chains, alicyclic hydrocarbons or aromatic compounds of which the carbon atom numbers do not exceed 50; and F1 and F2 are organic groups with functional groups and have different structures. The additive prepared by using the preparation method can be introduced to rubber compositions so as to comprehensively improve the hardness, wet skid resistance, dynamic mechanical property and tensile property of rubber, and even, in parts of exemplary embodiments, the rubber compositions containing the additive with the functional group double-terminated structure have improved Shore hardness, elongation at break and wet skid resistance.

The invention provides a polylactic acid/modified polypropylene carbonate/thermoplastic guar gum composite material and a preparation method thereof. The polylactic acid/modified polypropylene carbonate/thermoplastic guar gum composite material comprises the following materials in parts by weight: 100 parts of polylactic acid; 5 to 30 parts of modified polypropylene carbonate; 5 to 25 parts of thermoplastic guar gum; 1 to 5 parts of a plasticizer; 0.1 to 0.5 part of a lubricant. The olylactic acid/modified polypropylene carbonate/thermoplastic guar gum composite material is available in all components, low in cost, nontoxic, green and environmentally friendly, has the characteristics of excellent processing rheological property and mechanical property, low cost and capability of being biodegradable, and is applicable to the manufacture of plastic products, such as disposable tableware, packing materials and films, through various forming technoliges.