Novel application of hexafluoroisobutylene

A new application technology of hexafluoroisobutylene, which is applied in the new application field of hexafluoroisobutylene, can solve the problems that affect the energy-saving upgrade of household refrigerators and freezers, the poor heat insulation effect of polyurethane foam, and high thermal conductivity, so as to shorten the demoulding time, Increase the effect of heat preservation and reduce the effect of thermal conductivity

Inactive Publication Date: 2018-09-28
张振宽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the substance is flammable and explosive, and safety modification of the foaming equipment is required
And because of the high thermal conductivity of this substance, the heat insulation effect of polyurethane foam is not good.
Energy-saving upgrades affecting household refrigerators and freezers

Method used

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  • Novel application of hexafluoroisobutylene
  • Novel application of hexafluoroisobutylene
  • Novel application of hexafluoroisobutylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 Refrigerator foaming (composite with cyclopentane and use as blowing agent)

[0032] Polyurethane foam: adopt the following raw materials in parts by mass: 100 parts of combined polyether (comprising polyether polyol, foam stabilizer, catalyst), 11.5 parts of cyclopentane, 5.5 parts of blowing agent hexafluoroisobutylene of the present invention; Polymerized MDI) 146 parts.

[0033] From Table 2 and figure 1 It can be seen that the foaming agent of the present invention forms a binary mixed foaming agent with cyclopentane, and its foaming process parameters and foam quality fully meet the requirements for use. In other embodiments, when compounding with cyclopentane, the mass ratio of hexafluoroisobutene to cyclopentane can be within the range of 1:(1-3), preferably 1:2.09. In other embodiments, It can be combined with HFC blowing agent or HFO blowing agent. The mass ratio of hexafluoroisobutene to HFC blowing agent or HFO blowing agent is 1: (1~1.5). The...

Embodiment 2

[0036] Embodiment 2 Refrigerator foaming (hexafluoroisobutylene is used alone)

[0037] Table 3 embodiment 2 foaming material formula and test result

[0038]

[0039] from Table 3 and figure 2 It can be seen that the foaming process parameters and foam quality of the foaming agent of the present invention fully meet the requirements for use. In other embodiments, the weight ratio of the mixture of foaming agent and combined polyether to isocyanate is 1:(1.1~1.3) during application, and the weight ratio of combined polyether and blowing agent is 100:(13 ~30) can be in any range, preferably 100:(17~25).

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Abstract

The invention provides an application of hexafluoroisobutylene as a foaming agent in polyurethane foaming. The hexafluoroisobutylene can be used as a new generation of foaming agent and meets the following requirements: the ozone depletion potential (ODP) is 0, the global warming potential (GWP) is as low as possible, the foaming agent is not flammable, the boiling point is suitable, the gas-phaseheat conduction coefficient is low, the foaming agent is safe and reliable, and the like. The hexafluoroisobutylene can effectively protect the earth that we depend on for existence, and achievementsare gained for the present and benefits are gained for the future. The foaming agent and composite foaming agent can be applicable to the foaming of hard polyurethane insulation materials in the fields of household appliances, building heat preservation, cold-chain transportation, industrial heat preservation and the like. The hexafluoroisobutylene is not flammable, so that safety improvement oforiginal foaming equipment is not required in any aspects.

Description

technical field [0001] The present invention specifically relates to the new application of hexafluoroisobutene. Background technique [0002] CFC-11 (trichlorofluoromethane), the blowing agent in polyurethane foam, is listed as a controlled substance by the "Montreal Protocol on the Depletion of the Ozone Layer" because it destroys the ozone layer and aggravates the global warming effect. Since then, the international community has carried out research and application of various alternative substances. There are many alternative substances being used: HCFC-141b (dichlorofluoroethane); cyclopentane (Cyclopentane); HFC-245fa (pentafluoropropane) and HFC-365mfc (pentafluorobutane) series; [0003] CFC-11 (trichlorofluoromethane), ozone depletion potential (ODP) = 1, greenhouse effect potential (GWP) = 4750, was previously widely used as a polyurethane foaming agent. According to "China's Ozone-depleting Substance Phase-Out National Program (Revised Draft)", from January 1, 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/14C08G18/48C08L75/04C08G101/00
CPCC08G18/48C08G2101/00C08J9/141C08J2203/14C08J2203/16C08J2203/182C08J2375/04
Inventor 张振宽
Owner 张振宽
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