CN103467004A - Expanded organic fireproof blocking material and preparation method thereof - Google Patents

Abstract

The invention belongs to the technical field of fireproof sealing material and its preparation, in particular to an intumescent organic fireproof sealing material and a preparation method thereof. The organic fireproof sealing material is made by mixing inorganic filler, high-alumina aluminum silicate fiber cotton, expanded graphite, organic fireproof adhesive and diluent; wherein, in parts by mass, the content of each raw material is: inorganic filler 150- 220 parts, 10-20 parts of high-alumina aluminum silicate fiber cotton, 5-14 parts of expanded graphite, 108-130 parts of organic fireproof adhesive, and 8-12 parts of diluent. The fireproof blockage has remarkable fireproof and heat insulation effects, and can reach the A3 level in GB23864-2009 "Fireproof Blocking Materials". It has excellent physical and chemical properties, and has excellent weather resistance; it can adapt to various holes and openings in practical applications. And gaps, etc., which are convenient for construction, maintenance and replacement, and can effectively prevent flames and smoke in the fire scene from spreading and spreading through wall holes and gaps.

Description

Expansive organic fireproof sealing material and preparation method thereof

technical field

The invention belongs to the technical field of fireproof sealing materials and their preparation, and in particular relates to a kind of material suitable for sealing building penetrating structural cavities, gaps between building components or between fireproof partition components and other components, and plastic pipes passing through walls, floors, etc. Cavity intumescent organic fireproof sealing material and preparation method thereof.

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Background technique

my country's "Code for Fire Protection Design of Buildings" and "Code for Fire Protection Design of High-Rise Civil Buildings" stipulate that the openings formed when the penetrations (such as cables, air pipes, etc.) Carry out fire sealing to prevent the spread of fire and the spread of toxic fumes. Organic fireproof sealing material is the most commonly used fireproof sealing material.

At present, the domestically published patent documents on organic fireproof blocking materials include "organic fireproof blocking material" disclosed in 200310111118.3, "organic fireproof blocking material composition and its preparation method" disclosed in CN101423744, and "expandable halogen-free organic compound" disclosed in CN101503614. The manufacture method of fireproof blockage", the "manufacture method of non-expandable halogen-free organic fireproof blockage" disclosed in 200610053129.4, the "non-drying organic fireproof blockage and its preparation method" disclosed in 200410053754.X, etc. Although the relevant fireproof sealing materials disclosed in these patents can achieve certain technical effects, it is a pity that the inspection methods and evaluation standards of these products are all in accordance with GA 161-1997 "Performance Requirements and Test Methods for Fireproof Sealing Materials" ongoing.

On June 1, 2009, on the basis of GA 161-1997, the National Fire Protection Standardization Committee promulgated the national standard GB 23864-2009 "Fireproof Sealing Materials" with reference to the European Standard EN 1366 "Test Methods for Fireproof Sealing Materials", and from It came into effect on February 10, 2010. Compared with GA 161, GB 23864 not only subdivides the classification of fireproof sealing materials, but also puts forward stricter requirements on the physical and chemical properties and fire resistance of fireproof sealing materials. Taking organic fireproof blockage as an example, the current national standards not only add two testing items for its physical and chemical properties, resistance to heat and humidity and resistance to freeze-thaw cycles, but also require that the binder of organic fireproof blockage must have better weather resistance and be more durable. The important thing is that GB 23864 reduces the filling thickness of the blockage in the fire resistance test from the original 240mm to 200mm, and at the same time changes the cable used for the test from an aluminum core to a copper core, that is, while reducing the heat conduction distance of the product , It also increases the thermal conductivity of the conductor (the thermal conductivity of the copper conductor is about 1.7 times that of the aluminum conductor), which means that higher requirements are placed on the fire resistance of the organic fireproof sealing material. At present, the organic fireproof sealing materials disclosed in China are all designed and developed in accordance with the requirements of the GA 161-1997 standard without exception, and their performance is also tested in accordance with the GA 161-1997 standard, so their related performance is in accordance with the GB 23864-2009 standard Can not meet the requirements after implementation.

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Contents of the invention

In view of the above situation, the present invention provides an intumescent organic fireproof sealing material that meets the requirements of the national standard GB 23864-2009, and whose weather resistance and fire resistance are greatly improved compared with the prior art.

Another object of the present invention is to provide a method for preparing the above-mentioned intumescent organic fireproof sealing material.

Concrete technical scheme of the present invention is:

An intumescent organic fireproof sealing material, which is made by mixing the following raw materials:

Inorganic filler, high alumina aluminum silicate fiber cotton, expanded graphite, organic fireproof adhesive and diluent;

Wherein, by mass parts, each raw material content is:

150-220 parts of inorganic filler, 10-20 parts of high-alumina aluminum silicate fiber cotton, 5-14 parts of expanded graphite, 108-130 parts of organic fireproof adhesive, and 8-12 parts of diluent.

The inorganic filler is one or a mixture of diatomite, bentonite and kaolin. The size of the expanded graphite is 50-80 mesh, and the expansion ratio is more than or equal to 180 times.

The organic fireproof adhesive is prepared by mixing the following raw materials measured in parts by mass: 90-120 parts of chlorinated paraffin, 8-16 parts of chlorinated rubber or chlorinated polyethylene, and 1-2 parts of organic silicon oil.

The chlorine content of described chlorinated paraffin is 40-60%; The chlorine content of chlorinated rubber is 55-70%; The chlorine content of chlorinated polyethylene is 25-55%, and chlorine content refers to chlorine in The percentage content of the substance.

The silicone oil is one or a mixture of dimethyl silicone oil, methylhydrogen silicone oil, dimethylhydroxy silicone oil and active silicone oil. The diluent is any one of ethyl acetate and butyl acetate or a mixture of both.

A method for preparing an intumescent organic fireproof plugging material, the preparation steps of which are:

① Prepare the organic fireproof adhesive in the kneader first;

② Then add expanded graphite to the prepared organic fireproof binder, when the expanded graphite is evenly dispersed in the organic fireproof binder, then add high alumina aluminum silicate fiber cotton;

③ After the high-alumina aluminum silicate fiber cotton is fully dispersed, finally add inorganic fillers and knead evenly to make an intumescent organic fireproof sealing material.

Wherein, the preparation steps of organic fireproof binder are:

① Prepare materials in proportion;

②In the kneader, put chlorinated rubber or chlorinated polyethylene into chlorinated paraffin to melt, and the melting temperature is 60°C-80°C;

③Add organic silicone oil and diluent in proportion, and knead evenly to make an organic fireproof adhesive.

Compared with the existing organic fireproof sealing material, the expansion type organic fireproof sealing material provided by the present invention has the following positive effects:

1. The fireproof blocking material of the present invention adopts a unique formula, so that its fireproof and heat insulation effect is significantly improved, and it can reach the A3 level in GB 23864-2009 "Fireproof Blocking Materials", with excellent physical and chemical properties and excellent weather resistance .

2. The fireproof blocking material of the present invention adopts chlorinated paraffin, chlorinated rubber, chlorinated polyethylene, organic silicon oil, etc. as binders, so that the modified fireproof blocking material is in the form of clay and has long-term plasticity and flexibility, and the sealing performance Excellent, and has excellent corrosion resistance, water resistance, weather resistance and other physical and chemical properties, can adapt to various holes, openings and gaps in actual use, and is convenient for construction, maintenance and replacement.

3. An intumescent flame retardant is added to the fireproof blockage of the present invention, and the fireproof blockage can expand when encountering a fire, and can tightly seal various holes, openings and gaps to form a solid fireproof and heat insulation layer, which is effective It can effectively prevent the flame and smoke in the fire from spreading and spreading through the wall holes and gaps.

4. The raw material source of the fireproof blockage of the present invention is rich and easy to obtain, the production process is simple, and it has no corrosive effect on pipelines, wires and cables, etc.

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Detailed ways

The examples given below are specific descriptions of the present invention. It is necessary to point out that the following examples are only used to further illustrate the present invention, and cannot be interpreted as limiting the protection scope of the present invention. Those skilled in the art according to the above-mentioned SUMMARY OF THE INVENTION Some non-essential improvements and adjustments to the present invention still belong to the protection scope of the present invention.

Example 1:

The organic fireproof sealing material of the present invention is uniformly kneaded according to the formula in Table 1 (by mass parts) into a plastic solid with certain flexibility, then weighed and packaged.

Raw materials and proportioning (parts by mass), refractory performance of the embodiment of table 1

It can be seen from the above table that the fireproof sealing material is composed of various raw materials. The properties of various raw materials are different, and their own fire resistance performance is quite different. However, they play different roles in the fireproof sealing material and cannot be replaced by each other. Therefore, the raw material ratio of the fireproof plugging material has a significant impact on its fire resistance performance. As shown in Table 1, for the 8 examples listed, due to the different proportions of raw materials, the fire resistance time of the fireproof plugging material shows a large difference, the lowest is 65 minutes, and the highest is 186 minutes. Taking inorganic filler as an example, its content has a significant impact on the fire resistance of the fireproof sealing material. When the content of inorganic filler is too small (Example 6) or too much (Example 8), it is not conducive to improving the fire resistance of the fireproof sealing material. fire resistance performance. Only under the appropriate ratio of raw materials, various raw materials can cooperate with each other to achieve excellent fire resistance.

The three selected inorganic fillers, diatomite, bentonite, and kaolin are all non-combustible inorganic fillers, which can improve the heat resistance of the fireproof sealing material; these inorganic fillers have high lubricity, cohesiveness, and flexibility It is easy to mix and disperse, and can improve the plasticity and flexibility of fireproof sealing materials; in addition, these kinds of inorganic fillers are cheap and rich in raw materials.

Among the organic fireproof adhesives, both chlorinated rubber and chlorinated polyethylene have excellent weather resistance, corrosion resistance and aging resistance, and both are excellent adhesives. Compared with polyurethane resin, liquid petroleum resin (patent 201110392209.3) and polysulfide rubber, silicone rubber (200410053754.X) and other adhesives, chlorinated rubber and chlorinated polyethylene have good flame retardancy and are more suitable for fire protection Plugging material. Chlorinated paraffin is an excellent plasticizer for chlorinated rubber and chlorinated polyethylene, and the use of chlorinated rubber and chlorinated polyethylene can improve the flexibility of both, and chlorinated paraffin has good flame retardancy and low volatility It is more suitable for use in fireproof sealing materials than other plasticizers. The use of dimethyl silicone oil and dimethyl hydroxy silicone oil in conjunction with the above-mentioned adhesives can make the adhesive maintain good flexibility and plasticity for a long time.

Commonly used anti-cracking fibers in fireproof blockage include asbestos, rock wool, polypropylene fiber, etc. Among them, asbestos and rock wool have certain toxicity and are more harmful to the human body, and the heat-resistant temperature of polypropylene fiber is very low. Aluminum silicate fiber cotton is non-toxic, harmless to the human body, and has excellent heat resistance, good chemical and thermal stability, and high tensile strength. Compared with the above-mentioned anti-cracking fibers, the aluminum silicate fiber cotton can also improve the heat resistance of the fireproof sealing material while playing the role of anti-cracking. Compared with ordinary aluminum silicate fiber cotton, the content of aluminum oxide in high-alumina aluminum silicate fiber cotton is high, which further improves its heat resistance, and its service temperature can reach 1200 °C.

Expanded graphite is an excellent inorganic intumescent flame retardant. Its flame retardant performance is efficient and stable. It will expand to form a "worm-like" structure during the combustion process, so that the fireproof sealing material will expand during the combustion process and block the gap. , to isolate the smoke.

The present invention has been tested by the National Fireproof Building Materials Quality Supervision and Inspection Center according to the national standard GB 23864-2009 "Fireproof Blocking Materials". The test results are shown in Table 2:

Table 2 The performance index (GB 23864-2009) of the expansion type organic fireproof sealing material of the present invention

Claims (9)

1. An intumescent organic fireproof sealing material is characterized in that: the material is made by mixing the following raw materials: Inorganic filler, high alumina aluminum silicate fiber cotton, expanded graphite, organic fireproof adhesive and diluent; Wherein, by mass parts, each raw material content is: 150-220 parts of inorganic filler, 10-20 parts of high-alumina aluminum silicate fiber cotton, 5-14 parts of expanded graphite, 108-130 parts of organic fireproof adhesive, and 8-12 parts of diluent. 2. The organic fireproof sealing material according to claim 1, characterized in that: the inorganic filler is one or a mixture of diatomite, bentonite and kaolin. 3. The organic fireproof sealing material according to claim 1, characterized in that: the size of the expanded graphite is 50-80 mesh, and the expansion ratio is ≥ 180 times. 4. The organic fireproof sealing material according to claim 1, characterized in that: the organic fireproof adhesive is made by mixing the following raw materials measured in parts by mass: 90-120 parts of chlorinated paraffin, chlorinated rubber Or 8-16 parts of chlorinated polyethylene, 1-2 parts of silicone oil. 5. The organic fireproof sealing material according to claim 4, characterized in that: the chlorine content of the chlorinated paraffin is 40-60%; the chlorine content of the chlorinated rubber is 55-70%; The chlorine content of polyethylene is 25-55%. 6. The organic fireproof sealing material according to claim 4, characterized in that: the organosilicon oil is one or more of dimethyl silicone oil, methyl hydrogen-containing silicone oil, dimethyl hydroxy silicone oil and active silicone oil mixture of species. 7. The organic fireproof sealing material according to claim 1, characterized in that: the diluent is any one of ethyl acetate and butyl acetate or a mixture of both. 8. A method for preparing intumescent organic fireproof sealing material as claimed in claim 1, characterized in that its preparation steps are: First prepare the organic fireproof adhesive in the kneader; Then add expanded graphite to the prepared organic fireproof binder, and then add high-alumina aluminum silicate fiber cotton after the expanded graphite is evenly dispersed in the organic fireproof binder; After the high-alumina aluminum silicate fiber cotton is fully dispersed, the inorganic filler is finally added and kneaded evenly to make an intumescent organic fireproof plugging material. 9. the method for preparing intumescent organic fireproof sealing material according to claim 8, is characterized in that the step of preparing organic fireproof adhesive is: ① Prepare materials in proportion; ②In the kneader, put chlorinated rubber or chlorinated polyethylene into chlorinated paraffin to melt, and the melting temperature is 60°C-80°C; ③Add organic silicone oil and diluent in proportion, and knead evenly to make an organic fireproof adhesive.