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Self-skining flame retardation type polyurethane composite sleeper material and preparation method thereof

A flame-retardant, polyurethane technology, applied in the field of self-skin flame-retardant polyurethane composite sleepers, can solve the problems of low density and high strength, and achieve the effects of high production efficiency, fast curing speed and cost reduction.

Inactive Publication Date: 2009-10-07
上海世鹏聚氨酯科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a self-skinned flame-retardant polyurethane composite sleeper material formed by one-step reaction compounding. Features of high strength and self-skinning

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Preparation of Component A:

[0058] Take 65 parts by weight of polyol, 35 parts by weight of vegetable oil, 0.5 part by weight of catalyst, 15 parts by weight of flame retardant, and 0.03 part by weight of antioxidant, put it into a mixer, stir and mix for 1 to 2 hours, and divide the foaming agent 10 parts by weight. The parts by weight are added to the material to make A component.

[0059] Component B:

[0060] 135 parts by weight of MDI or TDI.

[0061] Preparation:

[0062] Reaction injection molding:

[0063] First, 10 parts by weight of component C glass fibers are placed in the mold, and then components A and B are injected into the mold containing component C. Components A and B react and combine with component C to make Crust flame retardant polyurethane composite sleeper material, or,

[0064] pultrusion

[0065] First, component A and component B are mixed with high pressure and then sprayed into 10 parts by weight of component C glass fiber, and then...

Embodiment 2

[0067] Preparation of Component A:

[0068]Take 75 parts by weight of polyol, 25 parts by weight of vegetable oil, 0.55 part by weight of catalyst, 13 parts by weight of flame retardant, and 0.03 part by weight of antioxidant, put them into a mixer, stir and mix for 1 to 2 hours, and divide the foaming agent 10 The parts by weight are added to the material to make A component.

[0069] Component B:

[0070] 130 parts by weight of MDI or TDI.

[0071] Preparation:

[0072] Reaction injection molding:

[0073] First, 60 parts by weight of component C volcanic rock fibers are placed in the mold, and then components A and B are injected into the mold containing component C. Components A and B react and combine with component C to form a self-bonded structure. Leather flame retardant polyurethane composite sleeper material, or,

[0074] Pultrusion:

[0075] First, component A and component B are mixed with high pressure and then sprayed into 60 parts by weight of component C ...

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PUM

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Abstract

The invention relates to a self-skining flame retardation type polyurethane composite sleeper material and the preparation method thereof. A self flame retardation system is composed by chemical material, is enhanced by glass fiber and volcanic fiber, and is combined with polyurethane to fabricate the self-skinning flame retardation type polyurethane composite sleeper. The invention overcomes the problems in the current sleeper synthesis and productions by two-step method; has simple process and low cost; can achieve sleeper with the physical properties of low density, high tensile strength, high shear strength and high elastic modulus. The composite sleeper is produced by injection or pultrude moulding. Counted by weight parts, the A component comprise: polyalcohol 30-85 parts, vegetable oil 10-50 parts, foaming agent 5-10 parts, catalyst 0.01-2 parts, flame retardant 5-25 parts and antioxidant 0.01-0.5 parts; wherein the foaming agent is nitrogen or air; the B component is diphenyl methane diisocyanate or toluene diisocynate; the mass ratio of the A and B components is 1:1-2; and the C component is material enhanced by glass fiber or volcanic fiber.

Description

technical field [0001] The invention relates to a self-skin flame-retardant polyurethane composite sleeper, which is suitable for railway rail sleepers, and has the advantages of self-fire-retardant, self-skin, one-step synthesis and the like compared with traditional organic synthetic sleepers. technical background [0002] At present, the organic synthetic sleepers at home and abroad are basically composed of two parts: the sleeper body and the coating on the outer surface of the body. The preparation method is to first make the sleeper body, and then spray a layer of flame retardant coating on the outer surface of the sleeper body. Due to the complex processing operation, high cost, labor and materials, the body material is non-flame retardant and so on. In order to overcome the above problems, a kind of synthetic sleepers with simple production, high efficiency and low cost is in urgent need of development to meet the needs of the market. SUMMARY OF THE INVENTION [0...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/48C08G18/36C08K3/00C08K7/14C08K7/04C08G101/00
Inventor 孙寿鹏孙寿松孙寿彬
Owner 上海世鹏聚氨酯科技发展有限公司
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