Combined polyether, hard polyurethane foam and preparation method thereof, and water heater

A technology of rigid polyurethane and combined polyether, applied in fluid heaters, lighting and heating equipment, etc., can solve problems such as failure to meet environmental protection requirements, ozone layer destruction, etc., achieve zero ozone depletion potential, low environmental protection requirements, and thermal conductivity low effect

Pending Publication Date: 2018-09-07
WUHU MIDEA KITCHEN & BATH APPLIANCES MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently commonly used rigid polyurethane foam is prepared by using a blowing agent including HCFC-141b (a fluorodichloroethane), and HCFC-141b (a fluorodichloroethane) has a destructive effect on the ozone layer and cannot Meet environmental protection requirements

Method used

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  • Combined polyether, hard polyurethane foam and preparation method thereof, and water heater

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preparation example Construction

[0059] The invention also provides a preparation method of rigid polyurethane foam.

[0060] refer to figure 1 , in one embodiment of the present invention, the preparation method of this rigid polyurethane foam comprises the following steps:

[0061] Step S10, uniformly mixing the organic isocyanate and the combined polyether;

[0062] Step S20, injecting the uniformly mixed composition into the foaming cavity for foaming.

[0063] In this embodiment, the specific structure of the combination polyether refers to the above-mentioned embodiment, at least, the combination polyether includes a polyol and a foaming agent, wherein the polyol includes polyether polyol and / or polyester polyol, and the foaming agent including hexafluorobutene. In this way, the rigid polyurethane foam prepared by the preparation method of the rigid polyurethane foam of the present invention is environmentally friendly and has a low thermal conductivity, so that the water heater with the inner tank c...

Embodiment

[0071] Raw material formula: the polyether polyol A of 40 weight parts, the polyether polyol B of 6 weight parts, the polyether polyol C of 30 weight parts, the polyester polyol of 10 weight parts, the composite flame retardant of 8.5 weight parts ( DEEP and DMPP weight ratio 1:1), 0.4 parts by weight of foaming catalyst (PC-12), 1.9 parts by weight of gel catalyst (PC-8), 0.5 parts by weight of polymerization catalyst (TMR-2), 2.0 parts by weight Parts of silicon foam stabilizer, 0.7 parts by weight of water, 5.5 parts by weight of HFC-245fa, 25 parts by weight of FEA-1100, 126.69 parts by weight of PM2010 (organic isocyanate) of Yantai Wanhua.

[0072] Preparation method: pre-mix the components in the above raw material formula except organic isocyanate in a stirring pressure tank; The organic isocyanate contained in the black material working tank is injected into the water heater water tank mold with vent holes on the top through a high-pressure mixing head under a pressur...

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Abstract

The invention discloses combined polyether, hard polyurethane foam and a preparation method thereof, and a water heater. The combined polyether comprises polyol and a foaming agent, wherein the polyolcomprises polyether polyol and/polyester polyol, and the foaming agent comprises hexafluorobutene. With a technical scheme in the invention, a hard polyurethane foam material prepared from the combined polyether is environment-friendly and has a low heat conduction coefficient.

Description

technical field [0001] The invention relates to the field of water heaters, in particular to a composite polyether, rigid polyurethane foam, a preparation method thereof and a water heater. Background technique [0002] In the water heater industry, the outer surface of the inner tank is usually covered with rigid polyurethane foam to reduce the heat loss of the water in the inner tank and improve the energy saving capacity of the water heater. However, the currently commonly used rigid polyurethane foam is prepared by using a blowing agent including HCFC-141b (a fluorodichloroethane), and HCFC-141b (a fluorodichloroethane) has a destructive effect on the ozone layer and cannot Meet environmental protection requirements. Contents of the invention [0003] The main purpose of the present invention is to propose a combined polyether, aiming at making the rigid polyurethane foam obtained from the combined polyether environmentally friendly. [0004] To achieve the above obj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/42C08J9/14C08K5/521C08K5/523C08K5/5333F24H9/00C08G101/00
CPCC08G18/14C08G18/4018C08G18/4208C08G18/4804C08G18/4829C08G2101/00C08J9/141C08J9/146C08K5/521C08K5/523C08K5/5333C08G2110/0025F24H9/0005
Inventor 余远明赵士虎曲绍鹤袁海霞朱洪阳
Owner WUHU MIDEA KITCHEN & BATH APPLIANCES MFG CO LTD
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