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A kind of low density, low temperature resistant polyurethane foam and preparation method thereof

A polyurethane foam, low temperature resistant technology, applied in the field of polymer materials, to achieve the effect of reducing the amount of perfusion, low density and saving raw material costs

Active Publication Date: 2021-12-24
NANJING HONGBAOLI POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, there are still deficiencies in the consideration of various properties of polyurethane foam.

Method used

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  • A kind of low density, low temperature resistant polyurethane foam and preparation method thereof
  • A kind of low density, low temperature resistant polyurethane foam and preparation method thereof
  • A kind of low density, low temperature resistant polyurethane foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Select the 1# raw material component in Table 1, mix polyol, catalyst, foam stabilizer, water and blowing agent to obtain component A1-1#, then mix component A1-1# with isocyanate, pass The high-pressure machine gun head is injected into the closed mold, fully reacted, the mold temperature is controlled at 35-42°C, and the polyurethane foam PU is obtained after demoulding, which is marked as 1#.

Embodiment 2

[0052] Select the 2# raw material components in Table 1, mix polyol, catalyst, foam stabilizer, water and blowing agent to obtain component A1-2#, then mix component A1-2# with isocyanate, pass The high-pressure machine gun head is injected into the closed mold, fully reacted, the mold temperature is controlled at 35-40°C, and the polyurethane foam PU is obtained after demolding, marked as 2#.

Embodiment 3

[0054] Select the 3# raw material components in Table 1, carry out moisture detection on hexafluoropropylene and isobutane, and reduce the moisture content to <0.005%, carry out insoluble content detection on isocyanate, select isocyanate with insoluble content ≤0.02%, Mix polyol, catalyst, foam stabilizer, water and cyclopentane to obtain component A2-3#, introduce isocyanate, hexafluoropropylene and isobutane into a clean static mixer, and obtain component A2-3# after mixing Divide into B2-3#, mix component A2-3# with component B2-3#, inject it into the closed mold through the head of a high-pressure machine gun, fully react, control the mold temperature at 35-40°C, and obtain polyurethane foam after demoulding PU, marked as 3#.

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PUM

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Abstract

The invention discloses a low-density, low-temperature-resistant polyurethane foam. The raw materials include polyol, foaming agent, catalyst, foam stabilizer, water and isocyanate. It is characterized in that the foaming agent contains pentane and hexafluoropropylene , the mass ratio of the total amount of pentane and hexafluoropropylene in the foaming agent is ≥90%, and the mass ratio of pentane to hexafluoropropylene is 1:0.5-3.2. The application also discloses three preparation methods of polyurethane foam. The application can reduce the global warming potential of the foaming agent system, reduce the foam density, ensure the foam stability, improve the low temperature resistance of the polyurethane foam, and optimize the heat insulation performance of the foam.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a low-density, low-temperature-resistant polyurethane foam and a preparation method thereof. Background technique [0002] With the increasingly stringent environmental protection regulations, the replacement technology of rigid polyurethane foam blowing agent has never stopped, but the existing blowing agent system is still difficult to meet the demand, such as HFC blowing agent, although the ozone depletion potential value ( ODP) is zero, but the global warming potential (GWP) is higher, and it still has adverse effects on the environment, and for cyclopentane foaming system, although its ODP is zero, GWP is low, but its flammability, thermal conductivity At the same time, due to the high boiling point of cyclopentane, it condenses into a liquid state in the cells at a low temperature, thereby affecting the dimensional stability of the foam. Although the replacemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/14C08L75/08C08L83/12C08G18/76C08G18/78C08G18/50C08G18/42C08G18/48C08G18/18C08G18/20
CPCC08J9/149C08J9/141C08J9/146C08J9/0061C08G18/7664C08G18/7843C08G18/725C08G18/4018C08G18/5027C08G18/1808C08G18/1816C08G18/2036C08J2375/08C08J2483/12C08J2203/14C08J2203/144C08J2203/164C08J2203/202
Inventor 邢益辉吴一鸣芮强张蒙蒙
Owner NANJING HONGBAOLI POLYURETHANE