Polyurethane composition, polyurethane foam as well as manufacture method thereof and fridge

A technique of polyurethane foam and its manufacturing method, which is applied in the field of polyurethane foam and its manufacture, and polyurethane composition, which can solve the problems of reducing refrigerator liner and refrigerator production efficiency, uneven thickness of foam alloy layer, increasing refrigerator cost, etc., and achieve fluidity And good adhesion, good fluidity, the effect of improving the bonding performance

Active Publication Date: 2015-06-03
HEFEI HUALING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve this problem, the measures that can be taken include: carry out secondary corona, increase the corona value of the plate, but the secondary corona will increase the cost, increase the working hours, reduce the production efficiency of the refrigerator liner and refrigerator; reduce the PE content , increase the polarity of the liner, but the thickness of the foam alloy layer produced by this measure is uneven, and there may be no alloy layer in some parts, which cannot achieve the anti-corrosion effect; increase the foam density, because the adhesion is affected by the foam density, The higher the density, the better the adhesion
But this kind of measure will increase the cost of the refrigerator

Method used

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  • Polyurethane composition, polyurethane foam as well as manufacture method thereof and fridge
  • Polyurethane composition, polyurethane foam as well as manufacture method thereof and fridge
  • Polyurethane composition, polyurethane foam as well as manufacture method thereof and fridge

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preparation example Construction

[0041] According to the preparation method provided by the embodiments of the present invention, the raw material used is the polyurethane composition described above, and the polyurethane foam prepared by this method has a low density, less than 28.5kg / m 3 , but has strong adhesion, and after foaming or high and low temperature impact, the foam and the inner tank will not be separated; in addition, the thermal conductivity of polyurethane foam prepared by this method is low, less than 17.5mW / m·k , High compressive strength, the minimum compressive strength is greater than 150Kpa.

[0042] It is worth noting that the polyurethane foam and its preparation method provided by the present invention use low vapor phase thermal conductivity, low GWP, and zero ODP foaming agent, which not only meets the energy-saving requirements, but also is environmentally friendly and green.

[0043] According to an embodiment of the fifth aspect of the present invention, the manufacturing method ...

Embodiment 1

[0047] Raw material formula: the sorbitol polyether polyol of 40 weight parts, the complex polyether polyol of 21.4 weight parts, the diphenylmethanediamine polyether polyol of 15 weight parts, the glycerine polyether polyol of 5 weight parts, 10 The aromatic polyester polyol of weight part, 3 parts of composite cross-linking agents (glycerol and ethylenediamine weight ratio 1:1), the foaming catalyst (PC-12) of 0.5 weight part, the gel catalyst (PC-12) of 1.8 weight part PC-8), 0.5 parts by weight of polymerization catalyst (TMR-2), 2.0 parts by weight of silicon foam stabilizer, 1.6 parts by weight of water, 38 parts by weight of trans-1-chloro-3,3,3- Trifluoropropene and 133.9 parts by weight of PM2010 (isocyanate index: 0.97) of Yantai Wanhua.

[0048] Preparation method 1: Premix the components in the above raw material formula except for isocyanate in a stirring pressure tank. The isocyanate in the material working tank is injected into the I-Mould mold (the mold size i...

Embodiment 2

[0051] Raw material formula: the sorbitol polyether polyol of 40 weight parts, the complex polyether polyol of 21.4 weight parts, the diphenylmethanediamine polyether polyol of 15 weight parts, the glycerine polyether polyol of 5 weight parts, 10 The aromatic polyester polyol of weight part, 3 parts of composite crosslinking agents (glycerol and ethylenediamine weight ratio 1:1), the foaming catalyst (PC-12) of 0.6 weight part, the gel catalyst (PC-12) of 1.5 weight part PC-8), 0.5 parts by weight of polymerization catalyst (TMR-2), 2.0 parts by weight of silicon foam stabilizer, 1.8 parts by weight of water, 8 parts by weight of trans-1-chloro-3,3,3- Trifluoropropene, 12 parts by weight of cyclopentane, 5 parts by weight of pentafluoropropane (HFC-245fa), and 137.5 parts by weight of PM2010 (isocyanate index: 1.10) from Yantai Wanhua.

[0052] Preparation method 1: with embodiment 1;

[0053] Preparation method 2: same as embodiment 1.

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Abstract

The invention discloses a polyurethane composition, polyurethane foam as well as a manufacture method thereof and a fridge. The polyurethane composition comprises the following raw materials in parts by weight: 25-60 parts of sorbitol polyether polyol, 15-40 parts of composite polyether polyol, 3-30 parts of diphenylmethane diamine polyether polyol, 3-15 parts of glycerin polyether polyol, 3-20 parts of aromatic polyether polyol, 0-5 parts of composite crosslinking agent, 1-55 parts of foaming agent, 1.0-5.0 parts of foam stabilizer, 0.5-2.0 parts of water, 1.0-3.5 parts of composite catalyst and 120-160 parts of isocyanate, wherein the index of the isocyanate is 0.95-1.10. The polyurethane composition provided by the technical solution is low in density and heat conductivity coefficient and strong in adhesive property. The fridge containing the polyurethane composition is good in insulation effect and low in energy consumption.

Description

technical field [0001] The invention relates to the technical field of refrigerators, in particular to a polyurethane composition, a polyurethane foam and a manufacturing method thereof, and a refrigerator. Background technique [0002] At present, the country pays more and more attention to energy saving and environmental protection, so the fourth generation of new environmentally friendly and efficient blowing agent - trans-1-chloro-3,3,3-trifluoropropene (hereinafter referred to as LBA), but, LBA It is very corrosive to the inner liner of the refrigerator. After the high and low temperature test, the inner liner appeared to be corroded and cracked. In order to solve this problem, in actual production, a HIPS / PE alloy liner was invented. However, the polarity of the surface of this type of alloy liner is low, and the bonding force with the foam material is small. Because the adhesion of rigid polyurethane foam is related to the foam density, the lower the density, the wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/50C08G18/42C08J9/14C08L75/08C08L75/06C08G101/00
CPCC08G18/4018C08G18/4208C08G18/482C08G18/4883C08G18/5024C08G18/6611C08G18/6618C08G18/7664C08J9/08C08J9/141C08J9/144C08J9/146C08J9/149C08J2203/02C08J2203/14C08J2203/142C08J2203/184C08J2375/06C08J2375/08C08G2110/005C08G18/42C08G18/48C08G18/50C08G18/66C08G18/76C08J9/14C08L75/06C08L75/08
Inventor 赵士虎李彩侠程发祥琚绍成朱洪阳张静静
Owner HEFEI HUALING CO LTD
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