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Polyurethane foaming material and preparation method thereof

A foaming material and polyurethane technology, applied in the field of foaming materials, can solve the problems of large foaming pore size and uneven distribution of foaming pore size, and achieve the effects of uniform distribution of cells, small size, and improved thermal insulation performance.

Inactive Publication Date: 2017-06-13
QINGDAO HAIER SPECIAL ICEBOX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a polyurethane foam material and its preparation method to solve the problems of large foaming pore size and uneven distribution of foaming pore size in the existing polyurethane foaming material

Method used

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  • Polyurethane foaming material and preparation method thereof
  • Polyurethane foaming material and preparation method thereof
  • Polyurethane foaming material and preparation method thereof

Examples

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preparation example Construction

[0021] The present invention also provides the preparation method of polyurethane foam material, and described method comprises the steps:

[0022] (1) Add the combined polyether into the high and low pressure circulation system, and a nucleating agent adding device is provided at the filter outlet of the combined polyether pipeline. When the combined polyether passes through the filter and is about to enter the mixing tank, open the The nucleating agent adding device, the nucleating agent is mixed into the combination polyether, and then the nucleating agent and the combination polyether are added into the mixing tank;

[0023] The pressure of the combined polyether fluid at the filter outlet of the combined polyether pipeline is relatively high, which can quickly mix the nucleating agent into the combined polyether, and can fully and uniformly dissolve the nucleating agent in the combined polyether, thereby making it possible to Combining polyether to form a large number of ...

Embodiment 1

[0032] (1) Add the combined polyether into the high and low pressure circulation system, and a nucleating agent adding device is provided at the filter outlet of the combined polyether pipeline. When the combined polyether passes through the filter and is about to enter the mixing tank, open the Nucleating agent adding device, mix the nucleating agent carbon dioxide into the combination polyether, and then add the carbon dioxide and the combination polyether into the mixing tank; the pressure of the high and low pressure circulation system is 12MPa, and the temperature is 18°C;

[0033] (2) foaming agent cyclopentane and isopentane are added in the mixing tank and mixed with the combination polyether, and then the mixed cyclopentane, isopentane and the combination polyether are added in the buffer tank;

[0034] (3) Keeping the pressure of the buffer tank is 13Mpa, adding isocyanate in the black material tank, keeping the pressure of the black material tank is 12Mpa, and the pr...

Embodiment 2

[0038] (1) Add the combined polyether into the high and low pressure circulation system, and a nucleating agent adding device is provided at the filter outlet of the combined polyether pipeline. When the combined polyether passes through the filter and is about to enter the mixing tank, open the Nucleating agent adding device, mix the nucleating agent nitrogen into the combined polyether, and then add the nitrogen and combined polyether into the mixing tank; the pressure of the high and low pressure circulation system is 13MPa, and the temperature is 20°C;

[0039] (2) foaming agent cyclopentane and isopentane are added in the mixing tank and mixed with the combination polyether, and then the mixed cyclopentane, isopentane and the combination polyether are added in the buffer tank;

[0040] (3) keep the pressure of buffer tank to be 13Mpa, isocyanate is joined in the black material tank, keep the pressure of black material tank to be 14Mpa, the pressure difference of buffer tan...

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Abstract

The invention discloses a polyurethane foaming material and a preparation method thereof. The polyurethane foaming material is prepared by foaming a white material, a black material, a foaming agent and a nucleating agent; the foaming pore diameter of the polyurethane foaming material is 60-80 microns and the coefficient of heat conductivity is 19mW / m.K-20mW / m.K; the foaming agent comprises cyclopentane and isopentane; the nucleating agent is nitrogen or carbon dioxide; and the mass ratio of the white material to the black material to the cyclopentane to the nucleating agent is (98-105) to (7-11) to (4-8) to (8-10) to (136-142). The nucleating agent of the polyurethane foaming material is nitrogen or carbon dioxide; nitrogen or carbon dioxide is sufficiently and uniformly dissolved into the white material so that a lot of small bubble nucleuses are formed in the white material; the small bubble nucleuses have small sizes and are uniformly distributed; the pore diameter of foam pores of the polyurethane foaming material can be effectively reduced and the distribution of the foam pores is uniform; and the coefficient of heat conductivity of the polyurethane foaming material can be reduced; and the heat-preservation performance of the polyurethane foaming material is improved.

Description

technical field [0001] The invention relates to the technical field of foaming materials, in particular to a polyurethane foaming material and a preparation method thereof. Background technique [0002] Polymer foaming materials are based on polymers, and a large number of cell structures are generated inside the polymer matrix by physical or chemical methods. Because the unique cell structure of the foamed material endows it with a series of excellent properties, such as low density, heat and sound insulation, high specific strength, cushioning, etc., it is widely used in packaging, industry, agriculture, transportation, military industry, aerospace, etc. It has a wide range of applications in the fields of industry and daily necessities. Commonly used types of foam materials are polyurethane (PU) soft and rigid foam, polystyrene (PS) foam, polyethylene (PE) foam, polypropylene (PP) foam, etc. Polyurethane foam is prone to residual isocyanate during the foaming process, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08J9/14C08L75/08C08G101/00
CPCC08G18/14C08G18/48C08G2101/00C08J9/141C08L75/08C08L2203/14
Inventor 那丹杨洪光韩照华赵风阳
Owner QINGDAO HAIER SPECIAL ICEBOX
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