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Method for preparing high-performance single-component polyurethane waterproof coating

A polyurethane waterproof and waterproof coating technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of cracking and peeling of the coating film, short working life, etc., and achieve a wide range of strength changes, large UV aging resistance, and superior performance The effect of flexibility

Inactive Publication Date: 2011-03-23
任绍志
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] General waterproof coatings have a good waterproof effect and a long working life when used on buildings in an environment without vibration interference, but if they are used for railways, tunnels, When on bridges, highways and other ancillary buildings, it is easy to crack and peel off the coating film, and the actual effective working life is very short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Polyether (polyoxyglycerol (5000) 30%, isocyanic acid (MDI) 10%, plasticizer (petroleum resin) 30%, filler (carbon black, talcum powder) 30%, water remover (TI) 0.2%, silane coupling agent (KH560) 0.1%, UV inhibitor (UV531) 0.5%, synthesis catalyst (stannous octoate) 0.1%, defoamer (P-420 / AC-301) 1.5%.

[0026] According to the above production process, waterproof coatings are produced. The properties of coating products are tensile strength 3.52MPa, elongation at break 882%, hardness 35A, bonding strength with substrate (concrete) 1.21Mpa, UV irradiation (500W, 100h) There is no change in the coating layer, no cracks at a low temperature of -40 degrees, and the water impermeability is impermeable for 30 minutes at 0.3Mpa. The waterproof coating is suitable for waterproofing of buildings without vibration.

example 2

[0028] Polyether (polyoxypropylene glycol 3000, polyoxypropylene glycol 2000) 50%, isocyanic acid (MDI) 20%, plasticizer (petroleum resin) 10%, filler (carbon black, nano zinc oxide) 10%, except Water agent (TI) 0.2%, silane coupling agent (KH560) 0.2%, UV inhibitor (UV531) 0.5%,: reinforcing agent (MOCA, epoxy resin, nitrile resin mixed in equal proportions) 10%, synthetic catalyst ( Stannous octoate and DMDEE mixed in equal proportions) 0.1%, defoamer (P-420 / AC-301) 1.5%.

[0029] According to the above production process, waterproof coatings are produced. The properties of the coating products are tensile strength 15.22MPa, elongation at break 656%, and the bonding strength with the base material (steel) is greater than 5.12Mpa. UV irradiation (500W, 100h) coating film There is no change in the layer, no cracks at a low temperature of -40 degrees, and the impermeability is impermeable for 30 minutes at 0.3Mpa. The waterproof coating is suitable for waterproofing of vibrati...

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Abstract

The invention discloses a method for preparing a high-performance single-component polyurethane waterproof coating. A one-step method is adopted in the method for preparing the waterproof coating, namely the waterproof coating is synthesized in one step by adding raw materials into a kettle body according to a proportion. Different from the preparation of the traditional double-component waterproof coating, the method has simple production operation, meanwhile, saves the operations of metering, mixing, stirring and the like in construction and greatly improves the construction efficiency and the safety of construction personnel. The invention adopts the technical scheme that: the waterproof coating comprises 20 to 40 percent of polyether, 15 to 35 percent of isocyanic acid, 10 to 30 percent of plasticizer, 15 to 30 percent of filler, 0.2 to 4 percent of water removing agent, 0.05 to 1 percent of silane coupling agent, 0.1 to 1 percent of ultraviolet resisting agent, 0.1 to 0.5 percent of synthesis catalyst, 0 to 10 percent of reinforcing agent and 1 to 3 percent of defoaming agent. By adopting the technical scheme and the process, the waterproof coating has excellent flexibility, high strength, ultraviolet ageing resistance and the like.

Description

technical field [0001] The invention relates to the technical field of waterproofing of chemical coatings, in particular to a high-performance single-component polyurethane waterproof coating material which is different from two-component waterproof coatings and has superior flexibility, high strength, and ultraviolet aging resistance. Background technique [0002] Due to poor performance, traditional asphalt waterproof coatings will gradually be replaced by modified asphalt waterproof coatings, especially polyurethane waterproof coatings, polymer emulsion cement waterproof coatings; polyurethane waterproof coatings, acrylic waterproof coatings and rubber-modified thick asphalt Waterproof coatings will be focused on development. Polyurethane waterproof coatings will gradually realize the transformation from coal tar type to non-tar type and pure polyurethane type, and finally completely eliminate tar type polyurethane waterproof coatings. [0003] General waterproof coating...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D7/12C09D5/00
Inventor 任绍志
Owner 任绍志
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