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A kind of polyol system for preparing polyurethane

A polyether polyol and polyol technology, applied in the field of polyurethane, can solve the problems of wasting time and reducing production efficiency, and achieve the effect of high strength

Active Publication Date: 2021-10-22
COVESTRO DEUTSCHLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This extra mixing wastes time and reduces productivity

Method used

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  • A kind of polyol system for preparing polyurethane
  • A kind of polyol system for preparing polyurethane
  • A kind of polyol system for preparing polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Prepare the polyol system A1-A5 of the present invention according to the parts by weight shown in Table 1:

[0071] Table 1: Polyol systems A1-A5 of the present invention

[0072]

[0073]

[0074] Prepare the contrast polyol system B1-B5 outside the scope of the present invention according to the parts by weight shown in Table 2:

[0075] Table 2: Control Polyol Systems B1-B5

[0076] B1 B2 B3 B4 B5 M9158 54 54 54 54 54 NJ 4502 10 10 10 10 10 ED 750 6 6 6 6 6 BDO 3 7 10 12 15 E100 2 2 2 2 2 PU 1748 10 10 10 10 10 pentaerythritol oleate 4 4 4 4 4 B8411 0.5 0.5 0.5 0.5 0.5 water 0.5 0.5 0.5 0.5 0.5

[0077] Prepare the contrast polyol system C1-C5 outside the scope of the present invention according to the parts by weight shown in Table 3:

[0078] Table 3: Control polyol systems C1-C5

[0079]

[0080]

[0081] The prepared polyol system A1-A5 and the...

Embodiment 2

[0091] According to the parts by weight shown in Table 5 and Table 6, the polyurethane system D1-D4 of the present invention and the control polyurethane system E1 not belonging to the present invention were prepared, and it was found that the polyol system in D1-D4 was not partly delaminated by observing the reserved samples. Use a high-pressure spraying system to mix the polyol system and isocyanate and spray it on the glass fiber mats on the upper and lower sides of the "sandwich semi-finished product", and then put the sandwich structure into a mold in a press with a temperature of 90-140 ° C, heat and cure After forming, the sandwich part is removed from the mold.

[0092] Table 5: Polyurethane system D1 and control polyurethane system E1

[0093]

[0094] Table 6: Polyurethane systems D2-D4

[0095]

[0096] It can be seen from Table 5 and Table 6 that the polyurethane system D1-D4 of the present invention can achieve rapid demoulding of less than 120 seconds after ...

Embodiment 3

[0098] The interlayer part (spare tire cover) prepared by using the comparison polyurethane system E1 in Example 2 and the polyurethane system D1 of the present invention is tested according to the test standard DIN EN / 310, and the results are summarized in Table 7 and Table 8:

[0099] Table 7: Comparative polyurethane system E1

[0100] Sample No. Sample width b0 Sample thickness a0 EMod mm mm N / mm 2

1-1 50.66 19.35 1434.89 1-2 51.36 19.32 1422.98 1-3 52.11 19.21 1475.36 1-4 48.94 19.19 1500.94

[0101] Table 8: Polyurethane system D1 according to the invention

[0102] Sample No. Sample width b0 Sample thickness a0 EMod mm mm N / mm 2

2-1 51.27 19.45 1533.64 2-2 51.45 19.39 1471.14 2-3 52.57 19.25 1641.96 2-4 51.47 19.31 1597.41

[0103] It can be seen from the test data that the physical properties of the final product obtained by using the polyureth...

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Abstract

The present invention discloses a polyol system for preparing polyurethane, comprising: i) at least one reactive chain extender having at least two isocyanate-reactive groups, at least one of which is isocyanate-reactive is the free Bi‑NH 2 groups; ii) at least one reactive chain extender having three isocyanate-reactive groups, wherein at least one isocyanate-reactive group is a free primary-OH group, and iii) at least one Amine-initiated polyether polyols. The polyol system of the present invention is phase stable, non-delaminated, and can be quickly released from the mold after reacting with isocyanate to form a polyurethane product.

Description

technical field [0001] The invention belongs to the technical field of polyurethane, and in particular relates to a polyol system used for preparing polyurethane, a polyurethane system containing it and a polyurethane product prepared therefrom. Background technique [0002] Polyurethane has a variety of properties and uses, including fibers (especially elastic fibers), elastomers, coatings, adhesives, soft and hard foams, artificial leather, etc. [0003] Due to the light weight and high stiffness of polyurethane, more and more polyurethane composites are used as interior components in the automotive industry. Polyurethane sandwich components are already known, which are produced by covering a core layer with a reinforcing layer, usually using reinforced glass fibers as covering material and honeycomb paperboard as core material. Natural fibers and other reinforcing materials can also be used for reinforcement, and other materials such as rigid foam, aluminum honeycomb pan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08L75/08
CPCC08G18/3206C08G18/324C08G18/4804C08G18/6677C08G18/6685C08L75/08C08G18/7664C08G2120/00C08G2125/00C08G18/3228C08G18/3234C08G18/5021C08G18/75C08G18/76
Inventor 朱宏施灵卢骅李军张晨曦
Owner COVESTRO DEUTSCHLAND AG