11 results about "Polymeric MDI" patented technology

The invention discloses a water-oil hybrid polyurea mortar waterproof floor coating as well as a preparation method and application thereof, and belongs to the technical field of floor coatings. The coating is composed of a component A and a component B, the component A is a hybrid isocyanate prepolymer and is prepared from 25 to 30 parts of polymerized MDI (Diphenyl Diisocyanate), 5 to 8 parts of nano SiO2 grafted isocyanate and 0.1 to 0.3 part of an oxidation catalyst; the component B is a water-oil hybrid amino compound and mortar reinforcing system, and comprises 60 to 70 parts of water-based polyaspartic acid ester, 30 to 40 parts of oil hydroxyl-terminated polybutadiene, 10 to 20 parts of silane modified quartz powder and 2 to 3 parts of Diels-Alder bond polymer. Through water-oil resin nano-hybridization, nano SiO2 grafting and dynamic reversible bond introduction, VOC is smaller than or equal to 5 g / L, the compressive strength is larger than or equal to 25 MPa, the self-repairing efficiency is larger than 90%, and the comprehensive performance of-15-50 DEG C wide-temperature construction is improved. In practical application, a one-bag film forming packaging system and an intelligent construction management system are matched, the construction efficiency and quality consistency are remarkably improved, and the method is suitable for industrial terraces, underground engineering and other high-requirement waterproof terrace scenes.

The invention belongs to the technical field of polyurethane pouring sealants, and particularly relates to a high-temperature-resistant hydrolysis-resistant polyurethane pouring sealant and a preparation method thereof. The high-temperature-resistant hydrolysis-resistant polyurethane pouring sealant is prepared from a component A and a component B, the component A is prepared from the following raw materials: amine ether polyol, modified castor oil, a flame retardant and a catalyst, and the component B is polymerized MDI, MDI-50 and carbodiimide modified MDI. The high-temperature-resistant hydrolysis-resistant polyurethane pouring sealant provided by the invention not only has good technological operation performance, but also has excellent high-temperature resistance and hydrolysis resistance, and still has good mechanical properties and electrical insulation properties under long-time high-temperature and hydrolysis conditions; the invention also provides a preparation method thereof.

The invention discloses a bio-based polyurethane adhesive for pavement floor tiles and a use method thereof, and the bio-based polyurethane adhesive is prepared by mixing and uniformly stirring the following raw materials in parts by mass: 90-110 parts of bio-based polyol, 15-25 parts of castor oil, 50-60 parts of polymerized MDI, a bismuth-zinc catalyst accounting for one hundred thousandth to one ten thousandth of the sum of the mass of the bio-based polyol, the castor oil and the polymerized MDI, and 1-5 parts of a defoaming agent, 1-5 parts of a drying agent, 1-4 parts of a coupling agent, 2-4 parts of fumed silica and 180-200 parts of dry silica powder. According to the bio-based polyurethane adhesive, a bio-based polyol and castor oil polyol system of a soft segment reacts with polymerized MDI of a hard segment to form a phase-separated'soft-hard segment 'microphase structure, and balance is formed; the excellent performance of the adhesive is realized through the cooperation of flexible chain segments of the bio-based polyol and the castor oil, the equilibrium reaction of the bismuth-zinc catalyst and the interface enhancement effect of the coupling agent and the inorganic filler.

The invention belongs to the field of oriented structural plates, and relates to an adhesive composition for an oriented structural plate, the oriented structural plate and a preparation method of the oriented structural plate. The adhesive composition for the oriented structural plate is prepared from the following components in parts by weight: 80 to 120 parts of polymerized MDI isocyanate, 5 to 10 parts of epoxidized natural rubber, 1 to 3 parts of carboxylated nanocellulose, 3 to 5 parts of a core-shell structure toughening agent, 1 to 2 parts of a silane coupling agent, 1 to 2 parts of a lignin model compound and 0.5 to 1 part of a latent catalyst. In the core-shell structure toughening agent, the core is polybutadiene, and the shell is polymethyl methacrylate. According to the adhesive composition disclosed by the invention, through multi-component collaborative design, the toughness is remarkably improved on the premise of not weakening the bonding strength, the contradiction between the bending strength and the impact toughness is fundamentally relieved, and a key material basis is provided for preparation of a high-performance formaldehyde-free oriented structural plate.

The invention relates to a polyurethane adhesive as well as a preparation method and application thereof. The polyurethane adhesive comprises a component A and a component B, the component A is prepared from the following components in parts by weight: 15 to 20 parts of polyolefin polyol, 10 to 15 parts of dimer alcohol, 20 to 30 parts of modified vegetable oil polyol, 10 to 15 parts of polyether glycol, 3 to 7 parts of chain extender and 1 to 3 parts of cross-linking agent; the component B comprises an isocyanate prepolymer; the preparation raw materials of the isocyanate prepolymer comprise polymerized MDI and dimer alcohol. The polyurethane adhesive provided by the invention can be used as a polyurethane structural adhesive, has good base material adaptability, high shear strength, excellent weather resistance and high and low temperature resistance, also has good thixotropy, does not flow in facade and top construction, has a proper curing rate, and can meet the requirement of rapid positioning in construction.

The invention discloses a pre-compounded aerogel modified polyurethane foaming insulation board and a preparation method thereof, and belongs to the technical field of polyurethane insulation materials. The pre-compounded aerogel modified polyurethane foaming insulation board is prepared from a component A and a component B through high-pressure foaming and in-mold curing molding, the component A is prepared from the following raw material components in parts by weight: 100 parts of polyol, 8 to 12 parts of modified silicon dioxide aerogel powder, 10 to 15 parts of modified glass fibers, 31 to 37 parts of a composite flame retardant, 4 to 6 parts of an environment-friendly foaming agent, 0.8 to 1.2 parts of deionized water, 1.2 to 1.8 parts of a composite silicone oil stabilizer and 0.48 to 0.95 part of a composite catalyst; the component B is prepared from 130 to 150 parts of polymerized MDI (Diphenyl Diisocyanate). Through cooperation of the modified silicon dioxide aerogel powder and the modified glass fibers, a three-dimensional interpenetrating inorganic framework is formed through pre-compounding and cooperates with a polyol system and polymerized MDI, and through high-pressure foaming and in-mold curing forming, the comprehensive performance of the heat insulation board is remarkably improved, and synergistic balance of heat insulation performance, flame retardant performance and mechanical performance is achieved.

This invention relates to the technical field of flame-retardant adhesives, and discloses a method for preparing and applying a hyperbranched polyamide amine-supported flame-retardant adhesive, comprising the following steps: (1) preparation of ADP / MPP@PAMAM; (2) pre-curing a mixture of ADP / MPP@PAMAM, 1,2-diaminobenzene, and 4,6-dihydroxyisophthalic acid, and grafting the resulting product with perfluorohexyl ethyl acrylate to obtain a composite flame retardant; (3) mixing polyether polyol, the composite flame retardant, and a wetting agent as component A, and polymeric MDI as component B, and mixing to obtain a flame-retardant adhesive. This invention uses hyperbranched polyamide amine as a carrier to successively support the ADP and MPP composite flame-retardant system, thereby improving the dispersion stability of the flame retardant. At the same time, it carries out a modification reaction, breaking through the thermal decomposition limit of ADP and the hygroscopic bottleneck of MPP. The resulting composite flame retardant is suitable for the hot pressing process of artificial boards.

The invention discloses anacardol modified polymerized MDI, which is prepared by the following method: carrying out hydrolysis reaction on anacardol glycidyl ether under an acidic condition to generate anacardol derived diol; and then reacting the cardanol-derived diol with the polymerized MDI at the temperature of 75-80 DEG C. The invention further discloses polyurethane floor paint based on cardanol modified polymerized MDI. The polyurethane floor paint is prepared from a component A and a component B, the component A is hydroxyl-containing resin or polyol, and the component B comprises cardanol modified polymerized MDI. The floor paint is prepared by reacting cardanol modified polymerized MDI with a hydroxyl-containing substance, a cardanol side chain introduced by the cardanol modified polymerized MDI plays roles of'molecular diluent 'and'space shielding', and the reaction speed and system viscosity of the floor paint are reduced, so that the floor paint has excellent construction performance and low bubble characteristic. The invention further discloses a preparation method of the polyurethane floor paint based on the cardanol modified polymerized MDI.

The invention relates to a formaldehyde-free environment-friendly adhesive, a formaldehyde-free environment-friendly shaving board and a preparation method of the formaldehyde-free environment-friendly shaving board, and the formaldehyde-free environment-friendly adhesive comprises the following components in parts by weight: 85-90 parts of glycosyl resin composition main glue and 10-15 parts of a curing agent, the preparation method of the glycosyl resin composition main glue comprises the following steps: preparing the following raw materials in parts by weight: 30-40 parts of cane sugar, 10-15 parts of urea, 50-60 parts of water, 2-3 parts of sodium hydroxide, 2-5 parts of tannin, 0.2-0.5 part of a silane coupling agent and 0.1-0.2 part of gas-phase nano silicon dioxide; the preparation process comprises the following steps: adding water into a reactor, then adding cane sugar, urea and tannin, uniformly stirring, heating to 50 DEG C, adding sodium hydroxide after the materials are completely stirred and dissolved, heating to 90-95 DEG C, reacting for 3 hours, cooling to 60 DEG C, adjusting the pH value to 5.5-6.5, adding a silane coupling agent, adding gas-phase nano silicon dioxide, keeping the temperature for 1 hour, cooling and discharging for later use; and the curing agent is liquid polymerized MDI.

This application relates to a high-density rigid polyurea coating and its preparation method. The polyurea coating comprises component A and component B. The raw materials for component A include: 10-30 parts by weight of isocyanate-modified MDI, 5-20 parts by weight of polyether diol, 15-35 parts by weight of polymeric MDI, 30-45 parts by weight of barium sulfate, and 1-2 parts by weight of a first auxiliary agent. The raw materials for component B include: 30-50 parts by weight of polyether polyol, 10-20 parts by weight of an amino chain extender, 20-40 parts by weight of barium sulfate, 5-10 parts by weight of a dehydrating agent, 2-5 parts by weight of a color paste, 0.5-2 parts by weight of a second auxiliary agent, and 0.2-0.5 parts by weight of a catalyst. The addition of barium sulfate to both component A and component B of this polyurea coating successfully solves the problems of excessive filler and poor storage stability in component A (modified isocyanate component) of the polyurea coating, resulting in a polyurea coating with high density and excellent compactness, significantly improving the anti-corrosion performance of the coating.

The invention belongs to the technical field of isocyanate production and manufacturing, and particularly relates to a polymeric MDI composition with low VOC impurity content and a preparation method thereof. The polymeric MDI composition comprises polymeric MDI and volatile VOC (volatile organic compound) impurities; on the basis of the total weight of the polymeric MDI composition, the total content of the volatile VOC impurities is less than or equal to 30 ppm; the volatile VOC impurities comprise one or more of a low-boiling-point solvent, phenyl isocyanate (PI) and a halide of the phenyl isocyanate (PI); wherein the content of the low-boiling-point solvent is less than or equal to 20ppm; the content of phenyl isocyanate (PI) is less than or equal to 5ppm; and the content of halide of phenyl isocyanate (PI) is less than or equal to 3 ppm. The content of volatile and toxic low-boiling-point substances in the polymeric MDI is in an extremely low range, so that harm to the environment or human bodies caused by slow volatilization of the substances remaining in downstream polyurethane products is avoided.