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Polyurethane foam as well as preparation method and application thereof

A polyurethane foam and foaming agent technology, applied in the field of polyurethane foam and its preparation, can solve the problems of not showing high strength performance, achieve low steam pressure, increase enterprise benefits, and improve compression resistance Effect

Active Publication Date: 2017-12-22
HEFEI HUALING CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese published patent CN104672420 discloses that the benzimide reinforced polyurethane modifier of rigid structure improves the strength of foam, but the foam density of 1-chloro-3,3,3-trifluoropropylene composite blowing agent is adopted in this invention Still ≥ 34.0kg / m 3 , does not exhibit high strength properties at low densities

Method used

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  • Polyurethane foam as well as preparation method and application thereof
  • Polyurethane foam as well as preparation method and application thereof
  • Polyurethane foam as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1-5 and comparative example 1

[0093] In Examples 1-5, by changing the ratio of polyol components and the ratio of each component in the composite catalyst, polyurethane foam with ultra-low density, high strength, excellent thermal insulation performance and good mold release performance can be prepared, as shown in the table below. Wherein, the polyol composition of the comparative example does not contain sucrose and lignin-based polyol.

[0094] Table 1 Comparison of composition and foam performance of the combined polyether raw materials of Examples 1-5 and Comparative Example 1

[0095]

[0096]

[0097] As can be seen from Examples 1-5 in Table 1 above, high-strength polyether polyols containing a large number of benzene rings and aromatic amine polyether polyols can be used to obtain high-strength , Polyurethane foam with good mold release properties. It can be seen from the above Table 1 that the comparative example does not contain sucrose and lignin-based polyols, the foam expansion rate an...

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Abstract

The invention provides polyurethane foam as well as a preparation method and application thereof. The polyurethane foam is prepared from the following components in parts by weight: 100 parts of combined polyether, 12 to 25 parts of mixed foaming agent, and 130 to 160 parts of isocyanate, wherein combined polyol in the combined polyether comprises lignin-based polyol, and the combined foaming agent comprises cyclo-isopentane and 1,1,1,2-tetrafluoroethane. According to the polyurethane foam provided by the invention, on one hand, lignin contains a great amount of benzene rings, phenolic hydroxyl groups and alcoholic hydroxyl groups, and the polyurethane foam prepared from the lignin-based polyol can improve the strength of the polyurethane; on the other hand, the polyurethane foam prepared by adopting the foaming system with a low boiling point containing cyclo-isopentane (the cyclo-isopentane consists of cyclopentane and isopentane) and 1,1,1,2-tetrafluoroethane (HFC-134a) is super-low in free foam density (18 to 20 kg / m3), and the core density of the polyurethane product is 27 to 29 kg / m<3>.

Description

technical field [0001] The invention relates to a polymer material, more specifically, to a polyurethane foam and a preparation method for preparing the polyurethane foam. Background technique [0002] Polyurethane foam mainly plays the role of heat insulation, skeleton support and adhesive filling in the refrigerator, and is an indispensable and important link in the refrigerator manufacturing process. The main foaming system currently replacing CFC-11 and HCFC-141b systems in the refrigerator industry is cyclopentane foaming system. [0003] The gas in the polyurethane foam cells of the cyclopentane system swells the cells when it condenses. When it is in a liquid state, the internal pressure of the cells decreases, forming a pressure difference, which causes the deformation of the foam and the refrigerator. For CFC-11, the density is between 32kg / m 3 It can withstand the stress caused by the pressure reduction in the cells, while cyclopentane requires 35kg / m 3 time to ...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/64C08G18/50C08G18/48C08J9/14C08G101/00
CPCC08G18/4081C08G18/4816C08G18/482C08G18/4829C08G18/5027C08G18/6492C08G18/7664C08J9/141C08J9/144C08J9/146C08J2203/14C08J2203/142C08J2203/202C08J2205/10C08G2110/0025C08G2110/005
Inventor 赵士虎袁海霞汪磊张可可
Owner HEFEI HUALING CO LTD
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