High-stability concrete silicone joint glue and preparing method thereof

Abstract

The invention discloses high-stability concrete silicone joint glue and a preparing method thereof. The joint glue is prepared, by mass, 100 parts of alpha,omega-dihydroxyl polydimethylsiloxane, 50-150 parts of packing, 0.5-10 parts of thixotropic agent, 0.5-10 parts of chain extender, 5-15 parts of curing agent, 0.1-5 parts of thickening agent, 0.01-3 parts of catalyst and 1-10 parts of liquid chemigum. The alpha,omega-dihydroxyl polydimethylsiloxane, the thixotropic agent and the packing are made into a base material in a kneading machine, then the base material is transferred into a high-speed dispersing machine, residual raw materials are added, a reaction is conducted, and the joint glue is obtained. According to the high-stability concrete silicone joint glue and the preparing method thereof, the silicone joint glue is modified through the liquid chemigum, the specific chain extender is adopted, permanent toughness and the mechanical property retention rate are given to the joint glue, a plasticizer is not transferred, adhesion is not damaged, meanwhile, the adhesion strength is greatly improved, the ageing resistance is good, environmental friendliness is achieved, and pollution does not exist.

Description

technical field [0001] Embodiments of the present invention relate to the field of polymer materials, and more specifically, embodiments of the present invention relate to a high-stability concrete silicone joint adhesive and a preparation method thereof. Background technique [0002] In recent years, global resource and environmental crises have occurred frequently, making people pay more and more attention to saving resources and protecting the environment. Under the background that low-carbon economy has become the mainstream economic development mode in the world, my country can no longer seek economic leap-forward development at the expense of the environment. As one of the high energy consumption and high pollution industries, my country's construction industry must take the road of sustainable development, and the development of industrialized buildings is imminent. [0003] As a joint product of traditional buildings and industrialized buildings, it plays a decisive...

AI Technical Summary

Problems solved by technology

[0005] However, the existing silicone joint adhesives have considerable defects: 1. In order to reduce costs or increase construction performance, a large amount of plasticizers (such as white oil, low-viscosity methyl silicone oil, etc.) are often added to the joint adhesives. , resulting in the comprehensive performance of the joint adhesive not meeting the requirements for use

2. The "oil" contained in the silicone sealant is easy to dissociate to the dust adhered to the surface of the colloid due to static electricity, and the dust will spread to the surrounding of the bonding surface with the rain and wind

Since concrete is a porous material, it is very easy to be polluted, resulting in banded pollution around the joints of the concrete slab, which affects the appearance

3. The high-elongation and low-modulus joint adhesive will increase in modulus, decrease in plasticity, and decrease in elongation at break with time in the later period of use.

This is because over time, the cross-linking reaction in the joint adhesive system is becoming more and more perfect, resulting in an increase in cross-linking density, so that the seam adhesive loses the characteristics of high elongation and low modulus during service.

Images