Shrink-proof polyurethane sealant

Abstract

The invention discloses a shrink-proof polyurethane sealant which comprises polyurethane resin, a flatting agent, a cross-linking agent, a lubricating agent, a surface control agent, a defoaming agent and a coupling agent, wherein the flatting agent is polyether modified silicone oil, the cross-linking agent is hydroxyethyl acrylate, the lubricating agent is butyl stearate, the surface control agent is polyethylene wax, the defoaming agent is phenethyl alcohol oleate, and the coupling agent is vinyl triethoxy silane. The shrink-proof polyurethane sealant is prepared from polyurethane resin and six additives including the flatting agent, the cross-linking agent, the lubricating agent, the surface control agent, the defoaming agent and the coupling agent, and the prepared product is small in internal and external tensile force, shrink-proof, stable in quality, fewer in bubbles, good in resistance to soiling and good in scratch resistance and wear resistance.

Description

technical field [0001] The invention relates to a sealing material, in particular to a shrink-proof polyurethane sealant. Background technique [0002] The sealing material refers to the material that can withstand the displacement of the joint to achieve the purpose of airtightness and watertightness and is embedded in the joint of the building, called the sealing material. Seal materials include metallic materials (aluminum, lead, indium, stainless steel, etc.), non-metallic materials (rubber, plastic, ceramics, graphite, etc.), composite materials (such as rubber-asbestos board, airgel felt-polyurethane), but The most used is rubber-like elastomer material. Polyurethane resin is widely used as a main sealing material raw material. However, due to the problem of large internal stress in the production and processing of polyurethane itself, the internal and external quality of the product cannot be guaranteed, and due to the impact of foaming in the production process, it ...

AI Technical Summary

Problems solved by technology

Polyurethane resin is widely used as a main sealing material raw material. However, due to the problem of large internal stress in the production and processing of polyurethane itself, the internal and external quality of the product cannot be guaranteed, and due to the impact of foaming in the production process, it will Potholes are caused to the product, causing the rubber to shrink, which in turn damages the surface of the product and is easy to be scratched, causing the accumulation of stolen goods