One-component high-elasticity silylated polyurethane waterproof coating and production method thereof

Abstract

The invention discloses a one-component high-elasticity silylated polyurethane waterproof coating and a production method of the one-component high-elasticity silylated polyurethane waterproof coating. The one-component high-elasticity silylated polyurethane waterproof coating is prepared from 50 to 70 parts of polyether polyol 330N, 180 to 200 polyether polyol DL-2000, 60 to 70 parts of diphenylmethane diisocyanate, 10 to 20 parts of toughening agent heavy-vacuum gas oil, 10 to 15 parts of a silane coupling agent, 0.3 to 0.5 part of a catalyst, 3 to 5 parts of a latent curing agent, 5 to 7 parts of epoxy resin, 20 to 30 parts of a non-reactive diluent, 140 to 180 parts of a powder filler, 3 to 5 parts of white carbon black, 3 to 5 parts of carbon black, and 0.3 part of an antioxidant. The one-component high-elasticity silylated polyurethane waterproof coating disclosed by the invention has the advantages of overcoming weaknesses of foaming, being more friendly to the environment, further lowering the production cost, facilitating popularization and application, prolonging the shelf life, shortening the curing time, improving the product quality, having better performances, especially bond performances, not requiring on-site measurement and blending for being a single component, thereby being more convenient and fast in construction.

Description

technical field [0001] The invention relates to a polyurethane waterproof coating, in particular to a single-component highly elastic silanized polyurethane waterproof coating and a production method thereof, belonging to the field of polyurethane waterproof coatings. Background technique [0002] One-component polyurethane waterproof coating is a reactive flexible waterproof coating made of isocyanate and polyether as the main raw materials and various additives. It has good physical properties, strong adhesion, and can be cured at room temperature and moisture. [0003] According to the national standard GB / T19250-2013, the solid content of one component is ≥85%, the surface dry time is ≤ 12 h, the hard drying time is ≤ 24 h, tensile adhesion, tensile strength ≥ 2.00 MPa, elongation at break ≥ 500%, no cracks at low temperature bending at -35°C, impermeability of 0.3 Mpa, impervious to water for 120min. [0004] It is found that there are few patent application documents ...

AI Technical Summary

Problems solved by technology

[0007] Existing single-component polyurethane waterproof coatings have the weakness of foaming, long curing time, short storage period, weak bonding with inorganic materials, not friendly to the environment, and high price

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