Polyurethane compound suitable for grouting and preparation method thereof

Abstract

The invention discloses a polyurethane compound suitable for grouting. The polyurethane compound comprises the following raw materials by weight: 30-60 parts of polyether, 3-12 parts of methyl silicone oil, 3-15 parts of a plasticizer, 10-25 parts of a flame retardant, 25-50 parts of polypropylene glycol, 1-7 parts of dihydromethyl propionic acid, 2-10 parts of a chain extender, 2-10 parts of a catalyst, 20-35 parts of polyisocyanate, 10-25 parts of polyether polyol, 20-60 parts of isophorone diisocyanate, 10-25 parts of glycerol, 2-15 parts of pentaerythritol, 2-8 parts of a defoaming agent, and 3-7 parts of a diluents. The preparation method provided by the invention is simple, and the prepared grouting composition can be used in a high-pressure environment, and can maintain the high strength characteristic for a long time, thus being suitable for popularization.

Description

technical field [0001] The invention relates to the technical field of grouting materials, in particular to a polyurethane compound suitable for grouting and a preparation method thereof. Background technique [0002] Concrete is widely used in various civil engineering projects because of its high compressive strength and good durability. However, since concrete is a multiphase heterogeneous brittle material, it is easy to produce cracks under the action of load, temperature and settlement. Some cracks will reduce the overall rigidity and durability of the structure. Therefore, it is necessary to use effective grouting materials to repair, restore or enhance the structural bearing capacity reduced due to cracking. The current grouting materials have poor impact resistance in high-pressure environments. , its durability is short, so we propose a polyurethane compound suitable for grouting and its preparation method. Contents of the invention [0003] Based on the technic...

AI Technical Summary

Problems solved by technology

However, since concrete is a multiphase heterogeneous brittle material, it is easy to produce cracks under the action of load, temperature, settlement, etc.

Some cracks will reduce the overall rigidity and durability of the structure. Therefore, it is necessary to use effective grouting materials to repair, restore or enhance the structural bearing capacity reduced due to cracking. The current grouting materials have poor impact resistance in high-pressure environments. , its durability is short, so we propose a polyurethane compound suitable for grouting and its preparation method