Foaming agent composition, polyurethane foam and manufacturing method thereof

Abstract

The invention provides a foaming agent composition, a polyurethane foam and a manufacturing method thereof. The foaming agent composition comprises a cyclopentane-isopentane mixture, hydrofluorocarbon and / or fluorochloroalkene and water. The polyurethane foam prepared from the foaming agent composition has greatly lower molding density; and in the process of manufacturing equivalent polyurethane foam, the mass of the required foaming agent composition and other materials for manufacturing the polyurethane foam is reduced, thereby lowering the manufacturing cost of the polyurethane foam. Besides, the ODP (ozone depletion potential) of the foaming agent composition is zero, so the foaming agent composition is harmless to the ozone and is more environment-friendly. In addition, the polyurethane foam prepared from the foaming agent composition has the advantages of lower heat conductivity coefficient, favorable thermal-insulation property, favorable flowability, uniform density distribution, smooth surface, higher foam compression strength and higher dimensional stability, so that the performance of the polyurethane foam can be enhanced.

Description

Technical field [0001] The present invention relates to the field of foamed thermal insulation materials, and more specifically, to a foaming agent composition, a polyurethane foam prepared by using the foaming agent composition, and a manufacturing method of the polyurethane foam. Background technique [0002] At present, the blowing agents used to make polyurethane foam are mainly cyclopentane, isopentane, pentafluoropropane (HFC-245fa), pentafluorobutane (HFC-365mfc), and tetrafluoroethane (HFC-134a). In addition to cyclopentane can be used as a blowing agent alone, isopentane has high thermal conductivity, pentafluoropropane (HFC-245fa), pentafluorobutane (HFC-365mfc) and tetrafluoroethane (HFC-134a) Due to the high cost or complicated use process, it is generally not used solely as a blowing agent, but mixed with cyclopentane to form a multi-element blowing agent; however, whether it is cyclopentane alone as a blowing agent, or cyclopentane and HFC -245fa composed of binary...

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Problems solved by technology

[0002] At present, the blowing agents used to make polyurethane foam are mainly cyclopentane, isopentane, pentafluoropropane (HFC-245fa), pentafluorobutane (HFC-365mfc), tetrafluoroethane (HFC-134a), In addition to cyclopentane can be used alone as a blowing agent, isopentane because of its high thermal conductivity, pentafluoropropane (HFC-245fa), pentafluorobutane (HFC-365mfc) and tetrafluoroethane (HFC-134a) Due to high cost or complex use process, it is generally not used as a single blowing agent, but mixed with cyclopentane to form a multi-component blowing agent; however, whether cyclopentane is used alone as a blowing agent, or cyclopentane and HFC The binary foaming agent composed of -245fa, or the ternary foaming agent composed of cyclopentane, HFC-245fa and HFC-134a, in order to meet the compressive strength and dimensional stability of polyurethane foam, the density of polyurethane foam must be ≥ 30kg / m 3 , the density is bigger, when making polyurethane foam, the material (such as blowing agent, dry white material etc.) that needs to make polyurethane foam is more, has increased the manufacturing cost of polyurethane foam; The thermal conductivity of polyurethane foam made as a foaming agent is generally 19.6 to 20.2mW / m k. When used for refrigeration products, the energy consumption is high. Although cyclopentane, HFC-245fa and HFC-134a are used The polyurethane foam prepared by foaming agent can reduce its thermal conductivity to between 18.5 and 18.8mW / m k, but because of its high density, when making polyurethane foam, the required materials for preparing polyurethane foam (such as blowing agent , dry white material) more, ultimately leading to higher manufacturing costs of polyurethane foam

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