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Preparation method and application of polyurethane foam mixture capable of releasing carbon dioxide

A technology of polyurethane foam and mixture, which is applied in the preparation of polyurethane foam mixture and the application field of polyurethane foam. Good for heat dissipation

Active Publication Date: 2022-04-01
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, not all industrial applications require the addition of small molecules such as flame retardants. In this case, the CO of hydrophobically modified polyethyleneimine 2 The adduct foaming agent is difficult to disperse in the white material, which limits the application of this type of foaming agent

Method used

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  • Preparation method and application of polyurethane foam mixture capable of releasing carbon dioxide
  • Preparation method and application of polyurethane foam mixture capable of releasing carbon dioxide
  • Preparation method and application of polyurethane foam mixture capable of releasing carbon dioxide

Examples

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preparation example Construction

[0035] [Preparation of polyurethane foam mixture]

[0036] In this embodiment, the mixing process is first performed, adding polyurethane foam raw materials, polyethyleneimine and / or graft-modified polyethyleneimine into the storage tank, and mixing and stirring evenly to obtain CO-absorbable 2 wherein, by weight, the weight of the polyurethane foam raw material is 100 parts, and the weight of polyethyleneimine and / or graft-modified polyethyleneimine is 0.1 to 100 parts, and the polyurethane foam raw material does not contain isocyanate , but containing polyols as polyurethane soft segments.

[0037]In the present embodiment, the type of polyol is not particularly limited. In some examples, the polyol can be a polyol oligomer or a mixture thereof. In other examples, the polyol comprises polyether polyols, polyester polyols, polybutadiene diols, castor oil-based polyols, vegetable oil-derived polyols, vinyl polymer grafted polyether polyols, and barrier polyols. at least one...

Embodiment 1）

[0056] In this example, PEI and polyether polyols are used as raw materials to prepare PEI-containing CO 2 Polyurethane foaming mixtures of adduct blowing agents and are used in the preparation of polyurethane foams. Add 100 kg of the two polyether mixtures (as shown in Table 1) into the storage tank, add 21.74 kg of branched PEI with different molecular weights, stir evenly, and keep the temperature at room temperature (25 °C) to obtain the absorbable CO 2 mixture; will be able to absorb CO 2 The mixture is transported to the pipeline reactor through a pressurized pump, and the liquid CO 2 Added into the pipeline reactor through a metering pump, the two reaction raw materials are fully mixed and reacted in the mixer, and sprayed into the polyurethane foaming mixture storage tank through the discharge port; the temperature of the material in the pipeline reactor is 25 ° C, and the pressure is 6.5 MPa; CO 2 The total amount added is 0.511 times the weight of PEI (that is, th...

Embodiment 2）

[0069] In this example, graft-modified PEI and polyether polyols were used as raw materials to prepare PEI-containing CO 2 The polyurethane foaming mixture of adduct blowing agent, and is used for preparing polyurethane foam, and wherein, graft modifier is dipropylene glycol methyl ether glycidyl ether (PPG-EPO, M n = 204.3 Daltons). First prepare the graft-modified PEI, taking the grafting degree of 5% as an example, add 20 kg PEI (containing 453.8 mol N, the source of PEI is the same as Table 1) into the reactor, and then add the corresponding grafting degree to calculate 4.636 kg of PPG-EPO (that is, 453.8 × 5% = 22.69 mol), and then add 30 L of absolute ethanol as a solvent, and react at 50 °C for 8 h. After the reaction, ethanol was distilled off under reduced pressure at 50°C, and then ethanol was removed under high vacuum at 50°C for 5 h to obtain the product 5%PPG-zPEI (z = 2.5k, 10k or 25k) with 5% grafting degree. The synthesis method of PEI with other grafting de...

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Abstract

The invention provides a preparation method and application of a polyurethane foam mixture, the preparation method comprising: a mixing process, adding polyurethane foam raw materials, polyethyleneimine and / or graft-modified polyethyleneimine into a storage tank , mixed and stirred evenly to obtain absorbable CO 2 The mixture, wherein, by weight, the weight of the polyurethane foam raw material is 100 parts, and the weight of the polyethyleneimine and / or the graft modified polyethyleneimine is 0.1 to 100 parts; the reaction process, The above absorbable CO 2 The mixture is delivered to the pipeline reactor by a pressurized pump, liquid or supercritical CO 2 The two reaction raw materials are fully mixed and reacted in the mixer, and sprayed into the polyurethane foaming mixture storage tank through the outlet to obtain CO containing polyethyleneimine. 2 Polyurethane foaming mixture of adduct blowing agents. The composite material prepared by the foaming mixture can be used for polyurethane foaming.

Description

technical field [0001] The invention relates to the technical field of blowing agents, in particular to a carbon dioxide (CO2) 2 ) The preparation method of the polyurethane foaming mixture and its application for polyurethane foaming. Background technique [0002] Polyurethane foam is widely used in sofas, mattresses, car seat cushions, refrigerators, pipes and building insulation. Usually, the raw materials of polyurethane foam are generally divided into two parts: isocyanate is a single component, generally called black material; Components other than isocyanate, including polyether polyols, catalysts, foaming agents and foam stabilizers, are generally called white materials, and foaming can be achieved by mixing black and white materials. Generally speaking, the production of polyurethane foam often requires a large amount of blowing agent. Traditional blowing agents are mostly low-boiling chlorofluorocarbon (CFC) and hydrochlorofluorocarbon (HCFC) compounds, which cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/12C08L75/08C08L79/02
CPCC08J9/122C08J9/0061C08J2203/06C08J2203/08C08J2375/08C08J2479/02
Inventor 谢兴益袁帅
Owner SICHUAN UNIV
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