Polyurethane foam composition

Abstract

The invention relates to the technical field of foam production, in particular to a polyurethane foam composition. According to the polyurethane foam composition, water in premixed polyether polyol reacts with isocyanate to generate carbon dioxide, carbon dioxide is not an ozone depleting substance (ODS), the ozone depleting potential (ODP) is zero, an atmospheric ozone layer cannot be destroyed, no VOC is generated, a catalyst enables isocyanate and polyether to form a polymer, a foaming agent accelerates foaming, and then the hole forming property of the polyurethane foam composition is achieved; when the polyurethane foam composition is used at high temperature, a ballooning phenomenon cannot occur, and then the high temperature resistance is achieved. The polyurethane foam composition has the advantages that the hole forming property is enough, therefore, the density is low, and the dimensional stability of the composition is improved; the high temperature resistance is achieved, and the dimensional stability is good.

Description

technical field [0001] The invention relates to the technical field of foam production, in particular to a polyurethane foam composition. Background technique [0002] Polyurethane is the abbreviation of polyurethane, and any polymer compound containing many repeated -NHCOO- groups on the main chain of the polymer is generally called polyurethane. [0003] Polyurethane foam has a wide range of applications and has penetrated into almost all sectors of the national economy, especially in furniture, bedding, transportation, refrigeration, construction, heat insulation and other sectors, and has become one of the indispensable materials. One of the varieties with the widest range of applications. [0004] Rigid polyurethane foam refers to a foam that will not deform significantly under a certain load, and cannot return to its original shape after being deformed when the load is too large; rigid polyurethane foam has the characteristics of light weight, high strength, insulatio...

AI Technical Summary

Problems solved by technology

[0012]Although rigid polyurethane foam has the above advantages, its high temperature resistance is poor, and it will produce obvious swelling phenomenon above 120-140°C. Once the high-quality polyurethane foam is deformed, it is irreversible; the traditional process of producing polyurethane foam doors (using polyurethane foam as the inner filler of the door panel) is to use the process of spraying and then foaming after the door panel is formed, to avoid the high temperature caused by the spraying process. The door body will be deformed after foaming, and the foam extrusion / leakage during the foaming process will inevitably pollute the surface of the door panel, seriously affecting the appearance quality of the finished door panel, because the foam and the door panel have good bonding performance, which will be difficult for later cleaning. work brings problems