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Polyurethane foaming agent

A polyurethane foam and foaming agent technology, applied in the field of polyurethane foam, can solve the problems of unfavorable product energy-saving applications, poor thermal insulation performance, and easy premature gasification, etc., to reduce the saturated gas phase density, improve thermal insulation performance, and improve The effect of solubility

Inactive Publication Date: 2013-08-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its own thermal conductivity of about 120mw / (m k), the thermal insulation performance is poor, which is not conducive to the energy-saving application of the product
[0005] Trifluoroiodomethane CF 3 I's ODP≤0.018, GWP3 I a kind of working fluid as blowing agent

Method used

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  • Polyurethane foaming agent

Examples

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Effect test

Embodiment 1

[0015] A kind of polyurethane foam blowing agent of the present embodiment comprises iodotrifluoromethane CF 3 The cyclopentane c-C5 of I, wherein: the molar percentage of trifluoroiodomethane is 10%, and the molar percentage of cyclopentane is 90%, and both are mixed homogeneously, promptly make mixed blowing agent. Calculate the thermal conductivity of the gas-phase foaming agent at room temperature 24°C and 0°C according to ASTM requirements, and the results of the thermal conductivity of the mixture are listed in Table I and Table II.

Embodiment 2

[0017] A kind of polyurethane foam blowing agent of the present embodiment comprises iodotrifluoromethane CF 3 The cyclopentane c-C5 of I, wherein: the molar percentage of trifluoroiodomethane is 20%, and the molar percentage of cyclopentane is 80%, and both are mixed homogeneously, promptly make mixed blowing agent. Calculate the thermal conductivity of the gas-phase foaming agent at room temperature 24°C and 0°C according to ASTM requirements, and the results of the thermal conductivity of the mixture are listed in Table I and Table II.

Embodiment 3

[0019] A kind of polyurethane foam blowing agent of the present embodiment comprises iodotrifluoromethane CF 3 The cyclopentane c-C5 of I, wherein: the molar percentage of trifluoroiodomethane is 30%, and the molar percentage of cyclopentane is 70%, and both are mixed homogeneously, promptly make mixed blowing agent. Calculate the thermal conductivity of the gas-phase foaming agent at room temperature 24°C and 0°C according to ASTM requirements, and the results of the thermal conductivity of the mixture are listed in Table I and Table II.

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Abstract

The invention discloses a polyurethane foaming agent, comprising the following components in mole percentage: 0.1-90% of trifluoroiodomethane CF3I and 10-99.9% of cyclopentane c-C5, preferably, 10-33% of trifluoroiodomethane and 67-90% of cyclopentane. The polyurethane foaming agent of the invention has advantages of good thermal insulation performance, boiling point temperature approaching room temperature and low combustibility, particularly, is suitable for hardened foaming or softened foaming for polyurethane foams, and is used for integrally foaming.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam, in particular to a foaming agent for polyurethane foam. Background technique [0002] As national standards gradually increase energy efficiency requirements for household refrigeration equipment (refrigerators, freezers, etc.), how to improve the energy efficiency level of refrigeration equipment has become a concern in the industry. Among them, it is a fast and effective way to reduce the thermal conductivity and improve the thermal insulation effect by improving the thermal insulation layer. Thermal conductivity is an important index to measure the thermal insulation performance of rigid polyurethane foam, which directly affects the thermal insulation effect and energy consumption of finished products such as refrigerators and panels. The heat transfer path of polyurethane rigid foam: 1) by gas, accounting for about 50% of the total; 2) by polyurethane matrix, accounting for about 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/14C08L75/04
Inventor 彭乐钦晏刚
Owner XI AN JIAOTONG UNIV
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