Rigid polyurethane foam plastic and preparation method thereof

Abstract

The invention discloses a rigid polyurethane foam plastic. The rigid polyurethane foam plastic is characterized by comprising the following components in parts by weight: 1-2 parts of pentamethyldialkylene triamine, 60-80 parts of water, 10 to 26 parts of a flame retardant, 3-4 parts of a stabilizer, 20-30 parts of a foaming agent, 0.02 to 0.03 part of an organic metal catalyst, 40 to 50 parts ofvegetable oil polyether polyol, 20 to 30 parts of petroleum polyester polyol, and 10 to 20 parts of polyethylene oxide polyol. The rigid polyurethane foam plastic disclosed by the invention has the beneficial effects that a foaming body is a low-temperature thermal-insulation material with a pore cavity high in the percentage of close area and low in water absorption rate, and the rigid polyurethane foam plastic has the advantages of small heat conductivity coefficient, high strength, stable chemical performance and convenience in construction; according to the preparation method for the rigidpolyurethane foam plastic, a polyurethane foaming mold is adopted in the preparation process, so in the process of foaming, raw materials do not overflow, foam does not collapse or shrink, the arrangement of a bracket allows the mold to be convenient to take after foaming is finished, and manual operation is facilitated.

Description

technical field [0001] The invention relates to the technical field of foamed plastics, in particular to a rigid polyurethane foamed plastic and a preparation method thereof. Background technique [0002] Polyurethane is a new generation of synthetic polymer materials. Its mechanical properties and physical and chemical properties are very special. By choosing different numbers of functional groups and different types of functional groups, and using different processes, polyurethane products with different removal properties can be prepared. [0003] Polyurethane foam castables are widely used in many fields of the national economy because of their excellent thermal insulation properties: such as thermal insulation of central heating pipelines, insulation layers of refrigerators, freezers, water heaters, and cold storage. The production process is complex and pollutes the environment. [0004] The following defects in the prior art: in the synthesis process of polyurethan...

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Problems solved by technology

The production process is complex and pollutes the environment

[0004] The following defects in the prior art: in the synthesis process of polyurethane, due to the problem of raw materials, it is easy to cause problems such as foam collapse, shrinkage, short gel time, and low closed cell rate of the cavity, which eventually leads to the impact of the strength of the product and the resistance to corrosion. Low compressive strength; moreover, in the process of using the foaming mold in the prior art with the mixture, not only the raw materials are easy to overflow during the foaming process, resulting in poor quality of the final foamed plastics but also the produced foamed products cannot Meet the demand, the operation is cumbersome and not suitable for industrial production

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