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Polyurethane composition, and thermosetting polyurethane composite prepared therefrom

A composite material and polyurethane technology, which is applied in the field of thermosetting polyurethane composite materials, can solve the problems of low fiber content and insufficient comprehensive mechanical properties of composite materials

Active Publication Date: 2019-06-25
WANHUA CHEM BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Patent CN200810140888.3 discloses a continuous fiber reinforced polyurethane composite material, its preparation method adopts foaming pultrusion molding process, the fiber content of the prepared composite material is not high, and the comprehensive mechanical properties are not high enough

Method used

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  • Polyurethane composition, and thermosetting polyurethane composite prepared therefrom
  • Polyurethane composition, and thermosetting polyurethane composite prepared therefrom
  • Polyurethane composition, and thermosetting polyurethane composite prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5、 comparative example 1-3

[0101] Embodiment 1-5, comparative example 1-3 composite material preparation method:

[0102] (1) Adopt Krauss-Maffei's LFI special equipment, the equipment pressure is (140±10)bar, the raw material temperature is (25±1)℃, the mold temperature is (50±3)℃, and the mold pressure is (200±10) kN, the fiber cutting length is set to 1cm;

[0103] (2) Add each raw material into the equipment, open the mold and pour, the pouring rate is 200g / s, close the mold and hold the pressure for 5 minutes, then open the mold to obtain a composite material product.

[0104] Among them, the composite materials of Examples 1-5 and Comparative Examples 1-3 were prepared according to the glass fiber content of 40%, 50%, and 60%, respectively, and the obtained composite materials were tested, and the test results are listed in Table 2.

[0105] Table 2

[0106]

[0107] Note: The performance data not filled in Table 2 indicates that the comparative sample cannot be tested because it cannot be mo...

Embodiment 6-10、 comparative example 4-6

[0111] Embodiment 6-10, comparative example 4-6 composite material preparation method:

[0112] (1) Special equipment for foaming and pultrusion is adopted, the pultrusion speed is 1m / min, the total length of the mold is 20m, the cross section is 200mm×50mm, and the molding temperature of the mold is 90°C;

[0113] (2) Pouring the raw material of the polyurethane composition into the resin tank of the equipment with a pouring rate of 100 g / s, mixing and infiltrating, molding, cooling and cutting to obtain a composite material product.

[0114] Among them, the preparation of the composite materials of Examples 6-10 and Comparative Examples 4-6 is carried out according to the glass fiber content of 40%, 50%, 60%, and 70%, respectively, and the obtained composite materials are tested, and the test results are listed in Table 4 .

[0115] Table 4

[0116]

[0117]

[0118] Note: The performance data not filled in Table 4 indicates that the comparative sample cannot be test...

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Abstract

The present invention provides a polyurethane composition, and a thermosetting polyurethane composite prepared therefrom. The composition comprises an organic isocyanate component A and an isocyanatereactive component B. The polyurethane composition has a good wettability with a reinforcing material when used to prepare t he polyurethane composite material, and the content of the fiber reinforcing material in the prepared composite material can reach up to 80%, so the composite material has high mechanical properties. In addition, the composite material provided by the invention has the advantages of simple process and low cost.

Description

technical field [0001] The invention relates to a polyurethane composition and a thermosetting polyurethane composite material prepared therefrom. Background technique [0002] Composite materials refer to materials with excellent properties composed of two or more materials with different properties through physical or chemical methods. Among them, polyurethane composite materials are mostly prepared with various fibers as reinforcing materials, which have the characteristics of low density, corrosion resistance, fast curing, and high mechanical properties, and have a wide range of applications. Commonly used preparation processes include reinforced reaction injection molding (RRIM), structural reaction injection molding (SRIM), long fiber reaction injection molding (LFI), foam pultrusion (FFU), etc. [0003] Although fiber-reinforced polyurethane composites have many advantages, they still have problems. [0004] Patent CN201410439154.0 discloses a long glass fiber reinf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/32C08K7/14
Inventor 曹铖赵军沈沉吴非
Owner WANHUA CHEM BEIJING
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