Hydrophobic Modified Polyethyleneimine Foaming Agent

Abstract

The invention relates to preparation of a hydrophobic chain modified polyethyleneimine foaming agent capable of releasing carbon dioxide and an application of the foaming agent in polyurethane foam materials. The grafting degree of a hydrophobic chain of the hydrophobic chain grafted polyethyleneimine foaming agent capable of releasing carbon dioxide is 1%-45%, the hydrophobic chain contains 1-2 polypropylene oxide repetitive units, and the terminal of the hydrophobic chain is C1-C6 alkoxy. By constructing a novel foaming agent core-shell structure in which an outer layer is an alkoxy polypropylene oxide chain and an inner layer is a CO2 adduct of polyethyleneimine, the polymerization degree of an alkoxy polypropylene oxide side chain of a CO2 adduct foaming agent of hydrophobic chain modified polyethyleneimine is decreased to 1 and 2, so that the dispersity of the prepared foaming agent in a polyurethane white material is not decreased, the smooth foaming process is guaranteed, and compared with corresponding foaming agents with the polymerization degrees more than 2 under the same grafting conditions, the CO2 content of the prepared foaming agent is substantially increased.

Description

technical field

[0001] The invention belongs to the technical field of foaming agent and its preparation and application, and in particular relates to the preparation of a hydrophobic chain-modified polyethyleneimine foaming agent capable of releasing carbon dioxide and the application of the foaming agent in polyurethane foam materials. Background technique

[0002] Polyurethane foam is used in large quantities and is widely used in sofas, mattresses, car seat cushions, as well as refrigerators, pipes and building insulation. The production of polyurethane foam requires a large amount of blowing agent, which has gone through four generations so far. The first-generation blowing agent is a low-boiling chlorofluorocarbon (CFC) compound, which will significantly damage the ozone layer and have a serious greenhouse effect, and its use is currently prohibited. Second generation blowing agents are hydrochlorofluorocarbon (HCFC) compounds. Although the ozone depletion potential ...

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