Rigid polyurethane foam plastic and preparation method thereof

A rigid foam plastic and polyurethane technology, applied in the field of thermal insulation materials, can solve the problems such as the inability to use in large quantities downstream, the high thermal conductivity of foam, and the reduction of the amount of foam used, and achieve good fluidity, low thermal conductivity, and high thermal conductivity. The effect of improving thermal insulation performance

Inactive Publication Date: 2018-06-08
HAIER SMART HOME CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After several generations of development, blowing agents are currently widely used mainly including alkanes, hydrofluorocarbons and hydrofluoroolefins, and alkane blowing agents mainly include cyclopentane, isopentane, etc. The outstanding feature is that ODP and GWP are relatively Low cost, low cost, but poor miscibility with foaming materials, high thermal conductivity of foam, flammable and explosive, high investment in equipment
The typical representative of hydrofluorocarbon blowing agent is

Method used

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  • Rigid polyurethane foam plastic and preparation method thereof
  • Rigid polyurethane foam plastic and preparation method thereof
  • Rigid polyurethane foam plastic and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0048] figure 1 It is a flow chart of the preparation method of polyurethane rigid foam according to an embodiment of the present invention. The present invention also provides a method for preparing rigid polyurethane foam, which specifically includes:

[0049] S102, mixing the combined polyols in a predetermined ratio to obtain a first mixture;

[0050] S104, pre-mixing alkane with 1,1,2,2-tetrafluoroethyl methyl ether and / or HFO type blowing agent in a predetermined ratio to obtain a blowing agent mixture;

[0051] S106, mixing the foaming agent mixture with the first mixture in a predetermined ratio to obtain a second mixture;

[0052] S108, mixing the isocyanate with the second mixture in a predetermined ratio, and injecting it into the film cavity, after foaming and curing, to obtain a rigid polyurethane foam.

[0053] The combined polyol is stirred for 2-3 hours at a temperature of 20-25°C, that is, polyether polyol A, polyether polyol B, polyether polyol C, and polyester polyo...

Example Embodiment

[0062] Example 1

[0063] The mass parts of each raw material in Example 1: polyol: 100 parts, cyclopentane: 10 parts, HFE254: 10 parts, isocyanate: 145 parts.

[0064] The specific preparation method of polyurethane rigid foam is as follows:

[0065] (1) Mix the combined polyol at 20-25°C for 2-3 hours to prepare a pre-whitening material;

[0066] (2) Mix cyclopentane and HFE245 at a temperature of 20-25°C and a mixing pressure of 2-3 bar for 2-3 hours to prepare a blowing agent mixture;

[0067] (3) Mix the foaming agent mixture and the pre-whitening material at a temperature of 20°C and a mixing pressure of 2-3 bar for 2-3 hours to prepare a second mixture;

[0068] (4) The second mixture and isocyanate are mixed at 20-25°C and 120-130bar pressure, injected into the preheated 40-50°C mold cavity, foamed and cured;

[0069] (5) Demould the cooled foam and test related performance.

Example Embodiment

[0070] Example 2

[0071] The mass parts of each raw material in Example 2: Polyol: 100 parts, cyclopentane: 10 parts, HFE254: 10 parts, LBA: 6 parts, and isocyanate: 145 parts. For the preparation method of the polyurethane rigid foam, refer to Example 1, and replace the cyclopentane and HFE245 in step (2) with cyclopentane, HFE245 and LBA.

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Abstract

The invention provides rigid polyurethane foam plastic and a preparation method thereof. The rigid foam plastic is prepared from the following components in parts by mass: 100 parts of combined polyol, 10-30 parts of a foaming agent composition and 120-150 parts of isocyanate, wherein the foaming agent composition comprises 10-30 parts of alkane, 10-30 parts of 1, 1, 2, 2-tetrafluoroethylmethyl ether and/or 1-10 parts of a hydrofluoroolefin foaming agent; the alkane comprises one or two of cyclopentane and isopentane; the hydrofluoroolefin foaming agent comprises one or two of 1-chloro-3,3,3-trifluoropropene and cis-1, 1, 1, 4, 4, 4-hexafluoro-2-butene. According to the invention, the more environment-friendly rigid foam plastic is provided, and the overall performance of the rigid polyurethane foam plastic is improved.

Description

technical field [0001] The invention relates to the technical field of thermal insulation materials, in particular to polyurethane rigid foam plastics and a preparation method thereof. Background technique [0002] Polyurethane rigid foam, as an excellent thermal insulation material, is widely used in building thermal insulation, electrical equipment and other fields. [0003] However, as people pay more and more attention to environmental protection, the impact of foaming agents for preparing polyurethane rigid foams on the environment has received more and more attention. Blowing agents often destroy the ozone layer and bring potential global warming. In order to measure the impact of these blowing agents on the environment, ODP (ozone destruction potential) and GWP (global warming potential) are used to measure . [0004] After several generations of development, blowing agents are currently widely used mainly including alkanes, hydrofluorocarbons and hydrofluoroolefins...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/42C08J9/14C08G101/00
CPCC08G18/4018C08G18/4208C08G18/4804C08J9/14C08J9/141C08J9/144C08J9/146C08J2203/14C08J2203/142C08J2203/162C08J2203/182C08J2203/202C08J2375/06C08J2375/08C08G2110/0025C08G2110/005
Inventor 刘站站赵坤坤李鹏
Owner HAIER SMART HOME CO LTD
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