Rare earth carboxylate modified polyurethane floor paving material and preparation method thereof

Abstract

The invention provides a rare earth carboxylate modified environmentally-friendly polyurethane floor paving material and a preparation method thereof. The preparation method comprises: vacuumizing polyether diol and polyether triol, dehydrating, degassing, adding low-volatility isocyanate, vacuumizing and degassing to obtain a component A of a polyurethane elastomer; adding rare earth carboxylateinto the vacuumized and degassed polyether triol under the action of ultrasonic waves to perform an reaction, adding a plasticizer, an inorganic filler and a pigment, mixing by stirring, vacuumizing,and removing dampness to obtain a component B of the polyurethane elastomer; uniformly mixing the component A and component B of the polyurethane elastomer according to a mass ratio of 1:3 to 1:5; and adding black rubber particles which is 0 to 50 percent based on the total added amount of the component A and the component B, polymerizing and solidifying to obtain the polyurethane floor paving material with high mechanical performance, high anti-aging performance and high mold resistance. The material can be widely used for paving athletic fields and paving floors in plants, hospitals and commercial places.

Description

A rare earth carboxylate modified polyurethane floor covering material and its preparation method technical field The invention relates to the field of polymer composite materials, in particular to a rare earth carboxylate-modified polyurethane floor covering material and a preparation method thereof. Background technique Since the 1970s, plastic venues have been used around the world to replace venues made of cinder or clay. PU (polyurethane) is a high molecular polymer. With its superior properties, it has been widely used in the construction of sports grounds and other ground paving in just over 20 years. The existing two-component polyurethane floor covering material is made by mixing polyurethane prepolymer (commonly known as component A) and curing agent (commonly known as component B), and then polymerizing with a catalyst. CN1389531 discloses a two-component colored polyurethane waterproof coating and its preparation process, and CN1088949 also discloses a polyur...

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Problems solved by technology

CN1389531 discloses a two-component colored polyurethane waterproof coating and its preparation process, and CN1088949 also discloses a polyurethane waterproof coating and its production process. However, in the production formula process of polyurethane floor covering materials, the raw materials used are all more toxic The TDI-MOCA-Pb system, the toluene diisocyanate used in the TDI-MOCA-Pb system is a chemical hazard, its vapor and air can form an explosive mixture, and it will decompose when heated to release toxic gas, especially for human skin and eyes. Stimulating and allergenic effects; and MOCA is a carcinogen, lead salts are highly toxic and cumulative poisoning

For this reason, many manufacturers and research institutes at home and abroad have begun to research and develop environmentally friendly plastic materials that are not TDI-MOCA-Pb systems. However, due to the poor chemical properties of TDI-MOCA-Pb substitutes, the developed environmentally friendly plastics The physical properties cannot meet the requirements for use

At present, there are also polyurethane ground paving materials prepared by modification of materials such as nanometers and whiskers in China, such as CN1352213A Chinese invention patent specification, which discloses a sports field paving prepared by polyurethane / nanometer montmorillonite prepared with nanomaterials Material and preparation method thereof, CN1450121 Polyurethane floor paving material modified with whisker material and preparation method thereof, but because nano and whisker materials are extremely easy to agglomerate due to van der Waals force, greatly reducing the dispersion of nano-montmorillonite in polyurethane properties, thus affecting the mechanical properties of polyurethane paving materials

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