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Dual components foaming system and products in use for fireproof plugging

A fire blocking, two-component technology, used in fire protection, building components, etc., can solve problems such as difficulty in ensuring fire protection, cable and metal bridges, pipeline corrosion, and easy cracking.

Inactive Publication Date: 2007-07-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fire-blocking package cannot meet the smoke-tight effect of the fire-proof sealing system, nor can it meet the air-tightness requirements required by some special industries. Moreover, the construction quality of the fire-blocking package is very difficult to control during the construction process, and it is difficult to ensure the fire prevention it should achieve. Effect
Most organic blockage materials such as fire prevention mud contain chlorinated paraffin and organic solvents, long-term use will cause corrosion to cables, metal bridges, pipes, etc., and cause fire hazards instead
The application range of inorganic blockage is narrow, and it is easy to crack and inconvenient to construct

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Buy 10 kilograms of commercially available thick MDI (diphenylmethane diisocyanate), 5 kilograms of polyester polyols with a hydroxyl value of about 420 mgKOH / g, 1 kilogram of hollow ceramic microbeads with a particle size of 400 mesh, and a particle size of 800 mesh APP (polyester polyol). 2 kg of ammonium phosphate), 2 kg of EG (expandable graphite) with a particle size of 50 meshes, industrial grade TEP (triethyl phosphate), 0.2 kg of industrial grade ferric oxide, 0.02 kg of potassium acetate, 0.03 kg of purified water, poly 0.02 kg of methyl siloxane, 0.02 kg of triethylenediamine. Mix all raw materials except crude MDI together and stir evenly to form component A, component B is crude MDI, divide A and B into two different containers, called fireproof foaming agent. During on-site construction, mix components A and B in a large container and stir at high speed for 30 seconds, then quickly pour it into the hole that needs to be sealed for fire prevention, and it wi...

Embodiment 2

[0028] Buy 70 kilograms of commercially available thick MDI (diphenylmethane diisocyanate), 50 kilograms of polyester polyols with a hydroxyl value of about 420 mgKOH / g, 10 kilograms of hollow ceramic microbeads with a particle size of 400 orders, and 800 orders of APP (polyester polyols) with a particle size of 400 orders 20 kg of ammonium phosphate), 20 kg of EG (expandable graphite) with a particle size of 50 meshes, industrial grade TEP (triethyl phosphate), 2 kg of industrial grade ferric oxide, 0.2 kg of potassium acetate, 0.3 kg of purified water, poly 0.2 kg of methyl siloxane, 0.2 kg of triethylenediamine. Mix all the ingredients together except the crude MDI and stir well to become the A component, and the B component is the crude MDI. In the factory workshop, mix A and B components in a large container and stir for 30 seconds with a large high-speed mixer, and then pour into a square mold to reflect the shape. After it matures, the mold is removed, and the molded p...

Embodiment 3

[0030] Buy 5 kilograms of commercially available thick MDI (diphenylmethane diisocyanate), molecular weight is 10 kilograms of polyether polyols of 6500, particle size is 1 kilogram of hollow ceramic microspheres of 400 orders, and particle size is 800 orders APP (ammonium polyphosphate) 2 kg, 2 kg of EG (expandable graphite) with a particle size of 50 meshes, industrial grade TEP (triethyl phosphate), 0.2 kg of industrial grade ferric oxide, 0.05 kg of purified water, 0.01 kg of organotin, and 0.01 kg of tertiary amine. Mix all the ingredients together except the crude MDI and stir well to become the A component, and the B component is the crude MDI. Pack A and B in two different containers, which are called fireproof foaming agents. During on-site construction, mix A and B components in a large container and stir at high speed for 30 seconds, then quickly pour into the holes that need to be sealed for fire protection, and the reaction will be complete within 1 to 5 minutes. ...

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Abstract

This invention discloses a bi-component foaming system and its product used for fireproof plugging of buildings. The bi-component foaming system is a fireproof plugging material, and is prepared by mixing components A and B at a ratio of (1-4):2, and reacting. Compoent A is composed of polyester polyol, polyether polyol, catalyst, foaming agent, foaming stabilizer and composite flame retardant. Component B is composed of polyisocyanates. The basic component of the bi-component foaming system and its product is flame retardant bi-component polyurethane foam plastic. The flame retardancy technique in this invention is much different from traditional flame retardancy technique using polyurethane foam plastic as the fireproof plugging material. Firstly, hollow microbeads are added during the preparation of polyurethane foam plastic, which can improve flame retardant effect, reduce the material viscosity, improve processability, and reduce the heat conductivity of polyurethane foam plastic. Thus polyurethane foam plastic with good heat insulation effect can be obtained. Secondly, polyisocyanurate is used to modify polyurethane foam plastic, which can improve the flame retardancy of polyurethane foam plastic. Thirdly, the synergistic flame retardant effect of polyisocyanurate, ammonium polyphosphate and expandable graphite can largely improve the flame retardancy of polyurethane foam plastic, and can largely reduce the addition amount of flame retardant with the same flame retardant effect.

Description

technical field [0001] The invention relates to a two-component foaming system and its products for fireproof sealing of buildings, that is, fireproof sealing material. It belongs to the field of chemical industry. Background technique [0002] Fireproof sealing material is used to seal or fill the openings (through openings) formed by cables, cable trays, conduits, various pipes, etc. through the floor or wall or used to seal building gaps, with fireproof, smokeproof, Material with thermal insulation function. It forms a fireproof sealing system with a certain fire resistance limit with the floor or wall (penetrated object) and cables, cable trays, pipes, etc., to prevent fire and toxic smoke from spreading in the building. The fire blocking system is an important part of the passive fire protection system of buildings. [0003] Building fire protection design can be divided into two parts: active fire protection system and passive fire protection system. The active fir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/42C08G18/72C08K7/22E04B1/94C08G101/00
Inventor 李响
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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