The invention discloses a two-component PU (polyurethane) coating. Firstly, castor oil is used for cross-linking prepolymers: a multifunctional group structure in the castor oil can cross-link the polymers to a certain extent, the cross-linking degree of the polymers is increased, so that the interaction force among molecular chains is increased, motion of the molecular chains is hindered, water molecules can hardly enter the molecular chains to enable the polymers to swell, and the water absorption of a film is reduced; meanwhile, the castor oil is a triglyceride of fatty acid, the film has the good hydrophobicity due to long nonpolar fatty acid chains in molecules of the castor oil, and the water absorption is further reduced; besides, ester groups in the castor oil have higher cohesive energy, so that the tensile strength of the film can be enhanced; ethyl cellulose has better heat resistance and thermoplasticity, has good compatibility with PU and can improve the comprehensive performance of the prepolymers; then blending modification is performed on the PU prepolymers and polysilsesquioxane.

Two-component PU (polyurethane) coating and preparation method thereof

The invention discloses a novel high-strength polyurethane waterproofing paint which consists of a component A and a component B. The component A is prepared from the following components in parts by weight: 140-350 parts of polyether polyol, 20-60 parts of TDI (toluene diisocyanate), 20-60 parts of diphenylmethane diisocyanate and 50-100 parts of a plasticizer; the component B is prepared from the following components in parts by weight: 50-100 parts of polyether polyol, 40-200 parts of a plasticizer, 20-80 parts of a chain extender, 100-300 parts of pigment and filler, 0.1-0.5 part of a catalyst, 0.1-0.5 part of a polymerization inhibitor and 0.1-1 part of a high-performance accessory ingredient defoaming agent. The invention also comprises a preparation method of the high-strength polyurethane waterproofing paint. The high-strength polyurethane waterproofing paint disclosed by the invention has relatively long operable construction time and excellent physical and mechanical properties such as high strength, high elongation rate and high bonding strength, and is low in residual TDI and toxicity. The novel high-strength polyurethane waterproofing paint can be widely applied to infrastructure construction and municipal traffic engineering, and particularly to water resistance of important projects such as high-speed railways and highway bridges.

Novel high-strength polyurethane waterproofing paint and preparation method thereof

The invention discloses an abrasion-resistant and environment-friendly polyurethane sports ground material and a preparation method thereof. The material is blended with an elastomer A component and a B component, wherein the elastomer A component comprises methylene diphenyl diisocyanate and polyether glycol; the B component comprises polyether triols, polyether glycol, a cross-linking agent, a plasticizer, epoxy resin, acrylic acid, silica solution, whiskers, aluminium oxide and pigment. The sports ground material is used to overcome the harm to human bodies and unsafe hidden dangers caused by TD1 and MOCA used in conventional sports ground paving materials, and provides an environment-friendly, abrasion-resistant, low-toxicity, harmless, low-cost and high-properties polyurethane sports ground material.

Abrasion-resistant and environment-friendly polyurethane sports ground material and preparation method thereof

The invention discloses a preparation method of an environmental-protection polyurethane waterproof coating. The preparation method comprises the following steps: 1) preparing a component A, namely a polyurethane prepolymer; 2) preparing a component B, namely a pigment filler; and 3) adding the pigment filler into 20-30 parts of the polyurethane prepolymer, adding a thickening agent, stirring for 1-2 h, and discharging to obtain the environmental-protection polyurethane waterproof coating. The new-generation double-component environmental-protection color polyurethane waterproof coating which contains no any solvent, has high solid content, has no pollution during a construction process, and has stable film coating performance, adjustable colors and excellent cost performance is prepared with a chlorinated paraffin liquid and industrial waste slag fly as a mixed filler.

Preparation method of polyurethane waterproof coating

The invention provides single-component exposed acrylic acid modified polyurethane waterproof paint and a preparation method The modified polyurethane waterproof paint is prepared from the following raw materials in parts by weight: 5 to 20 parts of isocyanate, 20 to 40 parts of hydroxyl terminated polyether, 2 to 10 parts of acrylate, 02 to 5 parts of a latent curing agent, 5 to 15 parts of a plasticizer, 5 to 20 parts of a solvent, 10 to 40 parts of pigment filling, 02 to 1 part of a catalyst, 01 to 1 part of a chain transferring agent, 02 to 1 part of an initiator and 01 to 1 part of a high-temperature auxiliary agent The invention further provides the preparation method of the single-component exposed acrylic acid modified polyurethane waterproof paint The single-component exposed acrylic acid modified polyurethane waterproof paint provided by the invention has the advantages of high strength, dense thin film and reliability of construction; the polyurethane waterproof paint has good weather resistance; the single-component polyurethane waterproof paint has a good waterproof performance, also has excellent weather resistance and high brightness and is suitable for construction of exposed base planes

Single-component exposed acrylic acid modified polyurethane waterproof paint and preparation method

The invention relates to a bi-component polyurethane coating which is prepared from a component A and a component B in a weight ratio of 1:(1-3), wherein the component A comprises the following materials in parts by weight: 40-80 parts of polylol, 20-50 parts of polyisocyanates, 1-10 parts of plasticizer and 0-5 parts of storage stabilizing agent; and the component B comprises the following materials in parts by weight: 10-40 parts of polylol, 10-40 parts of liquid filler, 5-10 parts of crosslinking agent, 30-60 parts of solid filler, 3-15 parts of plasticizer, 0.1-8 parts of thixotropic agent, 0-5 parts of pigment and 0.2-5 parts of additive. The bi-component polyurethane coating is suitable for water prevention, permeability resistance, corrosion resistance and protection of a horizontal plane, can be thickly coated and constructed (>3mm/turn) on complex parts such as a vertical surface and an incline, does not generate sagging and bubble phenomena in a construction process, is full in color, and has the advantages of excellent mechanical property, shock resistance, water resistance and corrosion resistance.

Bi-component polyurethane coating and preparation method thereof

The invention provides an environment-friendly high-performance methyl methacrylate self-leveling coating which includes an A component and a B component with a mass ratio of the A component to the B component being 1:1. The A component includes following components, by weight, 30-50 parts of a polyurethane prepolymer, 40-60 parts of an acrylic ester monomer, 0.01-0.05 parts of a polymerization inhibitor, 0.1-0.5 parts of a promoter and 0.3-1 part of a deoxidant; the B component includes following components, by weight, 30-50 parts of an polyurethane prepolymer, 40-60 parts of an acrylic ester monomer, 1-3 parts of an oxidizing agent and 0.01-0.05 parts of a polymerization inhibitor. The coating is simple in preparation technology and is mild in reaction conditions. Raw materials of the coating are easy to obtain. The coating is low in cost, is convenient to use, is high in wear resistance, flexibility, anti-permeability and is self-leveling. Convenience and intelligence in construction of the coating are improved. The coating is an excellent terrace material. Meanwhile, pollution of a solvent-type waterproof coating to the environment can be avoided.

Environment-friendly high-performance methyl methacrylate self-leveling coating, preparation method and application thereof

The invention discloses a polyurethane/polyurea composite protective layer and a preparation method thereof, and application of the polyurethane/polyurea composite protective layer in concrete shielding. The polyurethane/polyurea composite protective layer comprises a concrete base layer, a polyurethane elastic layer and a polyurea layer from bottom to top. The preparation method comprises the following steps: treating the surface of the concrete, and forming the polyurethane elastic layer by a multiple brushing or spraying method until reaching the designed thickness; and after the surface of the last brushing or spraying polyurethane layer becomes dry, spraying at least one polyurea layer to form the polyurethane/polyurea composite protective layer. The invention can be used for combined shielding of concrete surfaces in track traffic, parking lots, airports, roofs, road surfaces, playgrounds, sewage treatment plants, harbors, navigation locks, waterways, bridges, tubular piles and the like. The invention combines the elasticity, toughness and low price of the polyurethane with the shock resistance, wear resistance, corrosion resistance, aging resistance and other characteristics of the spraying polyurea to obtain the composite protective layer which has the advantages of excellent water resistance, excellent corrosion resistance, excellent shock resistance, high cost performance and high construction speed.

Polyurethane/polyurea composite protective layer and preparation method thereof, and application of polyurethane/polyurea composite protective layer in concrete shielding

The invention discloses a single-component polyurethane latent curing agent and a preparation method and an application thereof. The preparation method comprises the following steps of: A, putting X into a reaction kettle, and heating to 20-80 DEG C; B, continuously adding Y into a reactant within 1-4 hours, wherein the molar ratio of X to Y is (1:2)-(1:4); and C, heating the reactant to 100-180 DEG C, preserving heat for 2-9 hours, and collecting generated water, wherein X and Y are R1 or H or CH3; n is an integer ranging from 1 to 100; and R2 and R3 are H, alkyl, aryl or alkaryl. The surface drying time of single-component polyurethane containing the latent curing agent is 3-12 hours, the tensile strength is 2.4-6.5MPa, the elongation at break is 435-800 percent, and the tearing strength is 17-25N/mm; and a prepared film has a complete and continuous surface and is free from the phenomena of bubbles and hollowing.

Single-component polyurethane latent curing agent and preparation method and application thereof

The utility model discloses a waterproof, heat-preserving and root thorn preventing planted roof structure, which comprises a building top plate base layer, a heat preserving layer, a polyurea-coated waterproof and root thorn preventing layer, a separation slideable isolating layer or a leveling and protection layer, a filtration and drainage layer and a light medium layer. Since the waterproof, heat-preserving and root thorn preventing planted roof structure uses the characteristic of spray coating construction of the polyurea-coated waterproof and root thorn preventing layer, the construction period can be greatly shortened. Since the spray coated polyurea material has the characteristics of excellent mechanical property and seamless construction, the damages to the waterproof layer during construction and application can be effectively avoided and the situation of root thorns can be prevented from occurring. By using the single-pass polyurea-coated waterproof layer instead of the traditional waterproof roll materials and the puncture-proof materials, not only can the requirement of the traditional two-pass waterproof layers be satisfied, but also the situation of root thorns can be precluded and the goal of prolonging the service life is achieved; and at the same time, since the heat-preserving layer and soil plants have dual heat preserving effects, the goals of energy saving and environmental friendliness are better realized.

Waterproof, heat-preserving and root thorn preventing planted roof structure

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