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Polyalcohol composition, application thereof and rigid polyurethane foam prepared from polyalcohol composition

A technology of polyol composition and rigid polyurethane, which is applied in the field of rigid polyurethane foam, can solve the problems of affecting the curing performance of polyurethane foam, increasing production cost, and prolonging demoulding time, so as to reduce the filling amount of the model, reduce the production cost, The effect of less filling

Active Publication Date: 2014-06-25
HEFEI MIDEA REFRIGERATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the former increases production costs, while the latter affects the curing performance of polyurethane foam, resulting in prolonged demoulding time and reduced production efficiency

Method used

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  • Polyalcohol composition, application thereof and rigid polyurethane foam prepared from polyalcohol composition
  • Polyalcohol composition, application thereof and rigid polyurethane foam prepared from polyalcohol composition
  • Polyalcohol composition, application thereof and rigid polyurethane foam prepared from polyalcohol composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0149] In Examples 1-3, by changing the proportions of polyol components a1) to a5) and the proportions of each component in the composite catalyst, polyurethane foam with high fluidity and low density can be prepared, see Table 1 for details. Wherein, the polyol composition of Comparative Example 1 only includes polyol components a3)-a5), and the polyol composition of Comparative Example 2 only includes polyol compositions a2)-a5).

[0150] Table 1

[0151]

[0152]

[0153] From Examples 1, 2, and 3 in Table 1 above, it can be seen that using a low-viscosity polyol composition and a suitable composite catalyst can produce a polyurethane foam with high fluidity, and the foam has good physical and mechanical properties.

[0154] It can be seen from the above table 1 that comparative example 1 does not contain polyol components a1) and a2), and comparative example 2 does not contain polyol component a1), the foam expansion rate and thermal conductivity increase significan...

Embodiment 4-5

[0157] Examples 4, 5 and Comparative Example 3 are refrigerators made from the foams of Examples 1, 3 and Comparative Example 1, respectively. The experiment chose to make the same refrigerator model on the same equipment. The refrigerator is a 3-door air-cooled computer refrigerator, which has a freezing chamber with a foam thickness of 90mm, a refrigerating chamber with a thickness of 65mm, and a temperature-changing chamber after 65mm. The normal demoulding time of this refrigerator is 260s. See Table 2 for the component content and the properties of the prepared foam. After the refrigerator is demoulded, measure the difference between the thickness of the left and right sides of the box at the top, middle, and bottom and the thickness of the corresponding position of the box before foaming, that is, the deformation of the box before and after the refrigerator is demoulded (in mm), and take The average value, the difference between the maximum and minimum value of each pla...

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Abstract

The invention relates to a polyalcohol composition containing the following components in parts by weight: 5-45 parts of polyether polyol (a1) formed by toluenediamine and oxyalkylene polymerization, 7-50 parts of polyether polyol (a2) formed by toluenediamine, triethanolamine and oxyalkylene polymerization, 3-25 parts of polyether polyol (a3) formed by glycerin and oxyalkylene polymerization, 15-65 parts of polyether polyol (a4) formed by saccharose and oxyalkylene polymerization and 3-20 parts of polyether polyol (a5), wherein the total weight part of the components from (a1) to (a5) is 100. The invention also relates to an application of the polyalcohol composition to the preparation of rigid polyurethane foam and rigid polyurethane foam prepared from the polyalcohol composition.

Description

technical field [0001] The present invention relates to a polyol composition, its use for the production of rigid polyurethane foams and the rigid polyurethane foams produced therefrom. Background technique [0002] At present, the design of refrigeration equipment—especially refrigerators—has changed from direct cooling to air cooling, from mechanical refrigerators to computer refrigerators, and from single-compressor systems to dual-compressor systems, and more performance components have been added during production. The internal structure is getting more and more complex. Therefore, the forming requirements of its structural parts are more refined. However, during the forming and foaming process of structural parts, due to the influence of fluidity and internal structure, the foaming liquid cannot fully flow to various parts, and foam voids and low density often occur at the top, bottom or groove of the refrigerator. , Shrinkage and so on. [0003] Similar problems al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/02C08L67/00C08G18/79C08G18/50C08G18/48C08G18/42C08J9/08C08J9/14C08G101/00
Inventor 赵士虎李彩侠
Owner HEFEI MIDEA REFRIGERATOR CO LTD
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