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Modified polyurethane filling material for tunnel and preparation method thereof

A filling material, polyurethane technology, applied in the field of polyurethane materials, can solve the problems of poor flame retardancy, poor mechanical properties of phenolic materials, easy to be weathered, etc., to meet construction requirements and environmental protection requirements, good expandability and mechanical properties, anti-corrosion Good shear and toughness effect

Inactive Publication Date: 2015-08-12
山东润义金新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phenolic filling materials have outstanding flame retardancy, but their curing agent is a strong acidic substance, which is likely to cause certain injuries to construction workers during use. For example, leakage of material sticking to the skin can cause redness, swelling, itching, and serious contact with the eyes. Can lead to blindness; in addition, the residual formaldehyde in the phenolic resin also brings some pollution to the underground environment, and the mechanical properties of the phenolic material are poor and easy to be weathered
Polyurethane filling materials have good volatile and mechanical properties, are non-volatile and corrosive, and are safe and reliable to use, but their flame retardancy is poor, and they tend to gather heat during reaction (the internal temperature can reach above 160°C). Under certain conditions, it may even smoke and spontaneously ignite

Method used

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  • Modified polyurethane filling material for tunnel and preparation method thereof
  • Modified polyurethane filling material for tunnel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Prepare 100 kg of A component material: Weigh 30 kg of polyoxypropylene ether polyol with a functionality of 3 and a molecular weight of 3000, 16 kg of glycerin, 7 kg of OP-10, 807 kg of Tween, and 30 kg of Span Put 806 kg into the mixing kettle and stir evenly; 1 kg of AK-8872, 0.5 kg of triethylenediamine, 0.5 kg of pentamethyldiethylenetriamine, 20 kg of water, 12 kg of flame retardant, and stir evenly.

[0028] (2) Prepare 100 kg of component B materials: put 60 kg of weighed polymethylene polyphenyl polyisocyanate, 25 kg of diphenylmethane diisocyanate, and 15 kg of plasticizer into a mixing tank and stir evenly.

[0029] Mix and foam components A and B according to the weight ratio of A:B=1:1 to obtain the modified polyurethane filling material for the tunnel, and test the product index.

[0030] Molding core density: 60kg / m 3

[0031] Foaming multiple: 20

Embodiment 2

[0033] (1) Prepare 100 kilograms of component A materials: weigh 24 kilograms of polyoxypropylene ether polyols with a functionality of 3 and a molecular weight of 3000, 18 kilograms of glycerin, 7 kilograms of OP-10, 807 kilograms of Tween, and Put 806 kg into the mixing kettle and stir evenly; add 1 kg of AK-8872, 0.5 kg of triethylenediamine, 0.5 kg of pentamethyldiethylenetriamine, 20 kg of water, 16 kg of flame retardant, and stir evenly.

[0034] (2) Prepare 100 kg of component B materials: put 55 kg of weighed polymethylene polyphenyl polyisocyanate, 25 kg of diphenylmethane diisocyanate, and 20 kg of plasticizer into a mixing tank and stir evenly.

[0035] Mix and foam components A and B according to the weight ratio of A:B=1:1 to obtain the modified polyurethane filling material for the tunnel, and test the product index.

[0036] Molding core density: 50kg / m 3

[0037] Foaming multiple: 25

Embodiment 3

[0039] (1) Prepare 100 kg of component A material: weigh 25 kg of polyoxypropylene ether polyol with a functionality of 3 and a molecular weight of 3000, 15 kg of glycerin, 7 kg of OP-10, 807 kg of Tween, and Put 806 kg into the mixing kettle and stir evenly; 1 kg of AK-8872, 0.5 kg of triethylenediamine, 0.5 kg of pentamethyldiethylenetriamine, 20 kg of water, 18 kg of flame retardant, and stir evenly.

[0040] (2) Prepare 100 kg of component B materials: put 60 kg of weighed polymethylene polyphenyl polyisocyanate, 25 kg of diphenylmethane diisocyanate, and 15 kg of plasticizer into a mixing tank and stir evenly.

[0041] Mix and foam components A and B according to the weight ratio of A:B=1:1 to obtain the modified polyurethane filling material for tunnels, and test the product indicators.

[0042] Molding core density: 55kg / m 3

[0043] Foaming multiple: 22.

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Abstract

The invention belongs to the technical field of polyurethane materials and in particular relates to a modified polyurethane filling material for a tunnel and a preparation method thereof. The modified polyurethane filling material for the tunnel consists of a component A and a component B, wherein the component A comprises polyether polyol, glycerin, a foam stabilizer, a composite cosolvent, water, a catalyst and a flame retardant; and the component B comprises polymethylene polyphenyl polyisocyanates, diphenylmethane diisocyanate and a plasticizer. The filling material disclosed by the invention has high cohesiveness, is high in shear resistance and high in toughness after adhesion and impact-resistant, is low in smell of related raw materials, does not contain any volatile solvent, does not produce any harmful gas and completely meets the construction and environment friendliness requirements in the tunneling process.

Description

technical field [0001] The invention belongs to the technical field of polyurethane materials, and in particular relates to a modified polyurethane filling material for tunnels and a preparation method thereof. Background technique [0002] During the excavation process of large-scale construction projects such as railways, highways, and subways, cavities, various cracks, and excavated areas in high-emission areas are likely to become gas gushing channels and accumulation areas in the tunnel, bringing certain safety hazards. Currently used filling materials are mainly phenolic and polyurethane materials. Phenolic filling materials have outstanding flame retardancy, but their curing agent is a strong acidic substance, which is likely to cause certain injuries to construction workers during use. For example, leakage of material sticking to the skin can cause redness, swelling, itching, and serious contact with the eyes. It can lead to blindness; in addition, the residual form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08J9/06C08K5/521C08G18/48C08G18/32C08G18/66C08G18/76
Inventor 尚伟由明黄雷
Owner 山东润义金新材料科技股份有限公司
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