Polyurethane composite foaming agent and application thereof

Abstract

The invention discloses a polyurethane composite foaming agent and application thereof. The polyurethane composite foaming agent provided by the invention comprises the following components: cyclopentane, n-butane, and at least one of a carbonic acid organic alcohol amine salt compound, trans-1-chloro-3, 3, 3-trifluoropropene and perfluoroalkane. According to the polyurethane composite foaming agent disclosed by the invention, the ozone reduction potential (ODP) is 0, the GWP is obviously reduced, and the environment-friendly property is excellent; and meanwhile, polyurethane foam prepared by foaming of the polyurethane foaming agent has lower foam core density and higher foam strength, namely, the polyurethane foaming agent has higher heat insulation effect and strength at the same time. The invention also provides application of the polyurethane composite foaming agent.

Description

technical field [0001] The invention belongs to the technical field of foaming materials, and particularly relates to a polyurethane composite foaming agent and its application. Background technique [0002] Polyurethane foam is a high molecular polymer formed by mixing isocyanate and polyether as the main raw materials, under the action of various auxiliary agents such as foaming agent, catalyst, flame retardant, etc., through special equipment. Because polyurethane foam has good thermal insulation properties, it can be used in different fields of thermal insulation and cold insulation. Specifically, polyurethane foam is often used as a thermal insulation layer for making electric water heaters. [0003] However, the polyurethane foam used as the insulation layer of electric water heaters mostly adopts cyclopentane + HFC-245fa (pentafluoropropane, CAS number: 460-73-1) binary foaming technology or pure cyclopentane foaming technology. The polyurethane foam prepared by thi...

AI Technical Summary

Problems solved by technology

With the increasingly higher requirements of energy-saving standards, it is difficult for the polyurethane foam prepared by the commonly used foaming technology (foaming agent) to meet the increasing energy efficiency requirements. Excessive foam filling will also affect the foaming production efficiency and huge cost pressure

[0004] In addition, because the GWP value (Global Warming Potential) of HFC-245fa is as high as 1030, and the standard requires that the GWP value of the blowing agent used for foaming is less than 150, therefore, HFC-245fa and other products have been started since 2019. The growth of hydrofluorocarbon production is limited, and production is required to be reduced year by year until 2030.

However, due to the absence of good substitutes for the time being, the demand for HFC-245fa continues to grow with the development of the industry, which will inevitably lead to difficulties in its procurement, and the price will continue to increase on the basis of the existing high price, that is to say, in terms of cost At the same time, it also faces the problem of not being environmentally friendly

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