Low-viscosity high-strength environmentally friendly double-component glue solution and preparation method thereof

Abstract

The invention provides a low-viscosity high-strength environmentally friendly double-component glue solution and a preparation method thereof and relates to a sodium silicate-polyurethane double-component adhesive which can be used in the industries of construction and building materials and the like. The low-viscosity high-strength environmentally friendly double-component glue solution is prepared from sodium silicate and / or potassium silicate and polyisocyanate and their derivatives and further at least contains a coupling agent and / or coupling agent and polyol ester and / or alcohol ether suitable for being matched with the sodium silicate, the polyurethane component is prepared from polyisocyanate and an end-NCO prepolymer of polyether polyol and / or polyether glycol of the polyisocyanate, the mixture contains NCO 10-26%, and the matching ratio of the two components is in positive correlation with the specific gravity of the sodium silicate and is in negative correlation with the modulus of the sodium silicate within a certain range and is 1 to 0.7-2.5. The silane coupling agent is firstly added during preparation, and then the polyol ester and / or the alcohol ether is added after uniform stirring. The low-viscosity high-strength environmentally friendly double-component glue solution has low viscosity, excellent wettability and adhesion and good bonding strength and waterproof and weather-resisting properties, is adjustable in adaptation period, is naturally cured, makes the surface tough, bright and clean and is low-carbon, environmentally friendly, flame-retardant, rustproof, simple in process and low in cost.

Description

technical field [0001] The invention relates to a composition that can be used for bonding between building materials, industrial and mining enterprises and objects in daily life, matrix reinforcement, composite material production and object surface protection, especially a cheap bismuth containing water glass, isocyanate and its prepolymer component composition. Background technique [0002] Sodium silicate is a cheap and environmentally friendly inorganic rubber, but it is difficult to achieve satisfactory bonding strength and water resistance when used as an adhesive or dip-coated and laminated to make composite materials, although it can be added by adding sodium fluorosilicate And / or metal oxides shorten the curing time to increase the strength, but because of its inherent brittleness, it is difficult to be used in occasions with high requirements between metal and metal, metal and non-metal, and non-metal; and the coatings formulated with it are often also due to The...

AI Technical Summary

Problems solved by technology

However, the inventors have tried the most promising γ-(2,3-glycidyloxy) propyltrimethoxysilane, γ-mercaptopropyltriethoxysilane and other surfactants, but have not achieved Expected results, even very disappointed

As a two-component glue, water glass is a strong alkaline aqueous solution. A simple test is not difficult to prove that adding a lot of silane coupling agent to water glass, due to the particularity of water glass and the complexity of the two-component experiment very disappointed

Although adding some silane coupling agents to component B has a certain enhancement effect, it is easy to lose efficacy if it is added improperly