42results about How to "Adjustable curing speed" patented technology

The invention belongs to the field of chemical synthesis, particularly relates to a mineral polyurethane spraying material and a preparation method thereof and more particularly relates to a double-component (A and B) polyurethane material and a preparation method thereof. The material is mainly used for rapidly spraying and sealing underneath mine; and through the selection of polyol, auxiliaries and isocyanate, the spraying material has good adhesion on a rock coal body; and after adhesion is carried out, the material has good anti-shearing property and toughness and resists impact. According to the invention, the viscosity of the material is reduced so that the material can well permeate into a coal bed or a fine crack of a rock stratum, and simultaneously, the related raw materials are low in smell, do not contain volatile solvent and do not generate any toxic gases, thereby completely meeting the use and environment-friendly requirements of a coal mine reinforcement material.

The invention provides a low-temperature safety polyurethane injecting paste material for coal-rock mass reinforcement and a preparation method thereof, and belongs to the field of polyurethane compositions. The material consists of a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 100 parts of polyether polyol, 0.2 to 2.0 parts of catalyst, 0 to 5 parts of antistatic agent, and 20 to 30 parts of flame retardant; and the component B comprises the following raw materials in parts by weight: 70 to 90 parts of polyisocyanates, 5 to 20 parts of pre-polymer, and 5 to 10 parts of viscosity reducer. The preparation method comprises the following steps of: (1) preparation of the component A, namely mixing the raw materials of the component A for later use; and (2) preparation of the component B, namely mixing the raw materials of the component B, and performing nitrogen displacement for later use. The low-temperature safety polyurethane injecting paste material has the advantages of flame retardant and antistatic performances, high adhered strength, strong shearing resistance and high toughness. The preparation method is simple and practical, has low requirements on production equipment and staff, and is short in production cycle; and according to the whole process, three wastes are not produced, and the environment and health of workers are not influenced.

The invention discloses a loose coal and rock foaming urea-formaldehyde resin cementing material and method for preparing same, wherein the material comprises urea aldehyde resin, polyacrylates, organic macromolecular acid, carbonates, silicon oxide and inorganic ammonium salt. The invention can realize the normal temperature chemical foaming and solidifying for the urea aldehyde resin.

The invention belongs to the field of chemical synthesis, and particularly relates to a polyurethane high polymer material for coal rock mass reinforcement and a preparation method of the polyurethane polymer material. The polyurethane polymer material consists of component A and component B, wherein the component A is composed of a polyalcohol, a solvent, a catalyst and a fire retardant and the component B is composed of polyaryl polymethylene polyisocyanate. The polyurethane polymer material and the preparation method, disclosed by the invention, have the advantages that: through formulation design, foaming is carried out at a normal temperature, the curing rate is adjustable, the strength of consolidation body is high, compressive strength is more than 55mpa, the coal rock support force can be obviously increased; the consolidation body has very good toughness and can bear subsequent mining influence; the raw liquid is low in viscosity and has good permeability in the coal rock mass; and the caking property of the consolidation body and the coal rock mass is good; the related raw materials in the invention are green, pollution-free and harmless to human body, contain no volatile solvent and generate no any toxic gas, therefore, the use and environmental requirements for the coal rock mass reinforcement are completely satisfied; and the material is pressed and filled by using a double liquid grouting pump, therefore, the pumpability is good and the use is convenient.