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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 HFC-245fa (pentafluoropropane), which has low thermal conductivity, ODP is 0, but GWP is 990, it takes 8.4 years to disappear completely in the atmosphere, and has a great impact on the environment
Hydrofluoroolefin foaming agent is the latest generation of foaming agent, its ODP and GWP are close to 0, the thermal conductivity is also low, the foam density is low, and the consumption of foaming materials is reduced, but its price is expensive, and the current downstream Cannot be used in large quantities

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

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preparation example Construction

[0048] figure 1 It is a flow chart of the preparation method of polyurethane rigid foam according to one embodiment of the present invention. The present invention also provides a kind of preparation method of polyurethane rigid foam, and this method specifically comprises:

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

[0050] S104, pre-mixing alkanes with 1,1,2,2-tetrafluoroethyl methyl ether and / or HFO 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 according to a predetermined ratio, injecting the isocyanate into the film cavity, foaming and curing, to obtain 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, po...

Embodiment 1

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

[0064] Polyurethane rigid foam preparation method is specifically as follows:

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

[0066] (2) Mixing 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) mixing the foaming agent mixture and the pre-white 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) Mix the second mixture and isocyanate at 20-25°C under a pressure of 120-130 bar, inject into a preheated 40-50°C mold cavity, foam and mature;

[0069] (5) Demoulding the cooled foam to test related properties.

Embodiment 2

[0071] The parts by mass of each raw material in Example 2: polyol: 100 parts, cyclopentane: 10 parts, HFE254: 10 parts, LBA: 6 parts, isocyanate: 145 parts. Referring to Example 1 for the preparation method of polyurethane rigid foam, cyclopentane and HFE245 in step (2) were replaced 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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