TWI600751B - Both heat and fire prevention of composite materials - Google Patents

Description

Composite material with both heat and fire resistance

The invention relates to a composite material, in particular to a composite material having heat resistance and fire resistance with a closed porous structure.

Asbestos is a general name for the six large silicate minerals in the form of natural fiber. It is widely used in industrial facilities or daily life due to its soft fiber, insulation, heat insulation, sound insulation, high temperature resistance, acid and alkali resistance, and corrosion resistance. As insulation materials for reactors in the petrochemical industry and the steel industry, or insulation materials for buildings and electrical insulation boards.

However, asbestos fibers have been found to be harmful to humans, not only cause pulmonary fibrosis, but also induce malignant tumors of the trachea, bronchus or thoracic cavity. They are listed as the first type of carcinogens by the World Health Organization, and many countries have begun to restrict or ban asbestos.

There are many alternatives to asbestos, such as rock wool. However, it must be replaced at regular intervals to ensure the effectiveness of rock wool products. The melting point of rock wool is very high. The general waste incinerator can not incinerate and treat the abandoned rock wool. At present, it is mostly treated by landfill. However, because the rock wool is bulky, it will occupy a large amount of buried space, resulting in an increase in the disposal cost of waste rock wool. .

In order to solve the above problems, the Republic of China Invention Patent Publication No. I398559 proposes a method for recycling abandoned rock wool, which mainly removes the debris in the waste rock wool and then breaks the rock wool with a crusher and mixes it into 20% containing strontium. Calcium, magnesium natural ore and 10% starch adhesive, and the finished product is cold-pressed and agglomerated. After forming, the above raw materials are put into a high temperature furnace at 1600 ° C, and 10% of natural ore containing barium, calcium and magnesium is added as a reducing agent and 30% coke in the high temperature furnace. After being melted into a slurry by high temperature, it is drawn into a fiber filament by a high-speed centrifuge, and 3% starch glue is added to the fiber filament, and the waste rock wool is regenerated after drying and cutting.

Although the above patents propose a method for regenerating waste rock wool, the steps of regeneration still depend on cumbersome steps and high-temperature furnaces, and the cost is not necessarily in line with current industrial demand.

Others, such as U.S. Patent No. 4,075,804, teach a fireproof door that does not contain asbestos to reduce the risk of asbestos to the human body. The fire door core composition of this patent includes 78 wt.%-88 wt.% calcium citrate, 7.5 wt.%-10 wt.% vermiculite, 0.5 wt.%-5 wt.% sisal fiber ( Sisal fiber), 0.1 wt.% to 1 wt.% glass fiber, and 2 wt.% to 15 wt.% water.

There are still many teams working on other waste rock wool recycling methods, or materials other than rock wool that can be used for insulation, heat insulation, fire protection, etc., to solve existing problems.

The main object of the present invention is to solve the shortcomings of the conventional asbestos or rock wool products which cause harm to the human body or the environment, and at the same time provide a novel material which is environmentally friendly, has good heat resistance and has both fireproof and waterproof effects instead of asbestos or rock. The use of cotton in industrial facilities or in everyday life.

In order to achieve the above object, the present invention provides a method for manufacturing a composite material having both heat resistance and fire resistance, comprising the steps of: mixing a raw material with a solvent to form a mixture; and drying to obtain a green embryo, and sintering to obtain the a composite material having both heat resistance and fire resistance; wherein, based on 100% by weight of the total weight of the raw material, the raw material comprises: 1 to 33% by weight of aerogel; 20 to 70% by weight of oxide; 5 to 20 weight percent Gypsum; and 5 to 33 weight percent of a hydroxide-based inorganic resin; wherein the composite material has a closed-type porous structure.

In order to achieve the above object, the present invention also provides a composite material having both heat resistance and fire resistance, which is obtained by the aforementioned method.

Therefore, the effects of the present invention over conventional techniques are:

(1) The composite material with heat resistance and fire resistance of the present invention does not contain heavy metals and harmful solvents in raw materials or manufacturing processes, does not cause environmental pollution, and can be recycled, compared with conventional asbestos. Or rock wool products are more environmentally friendly.

(2) The composite material having both heat resistance and fire resistance of the present invention has a closed-type porous structure, and the raw materials are clustered after sintering to form a low-density nanoporous network, which is light in weight, low in thermal conductivity, and heat-insulating property. , weather resistance, fire resistance and hydrophobicity, fire resistance up to 1000 ° C, no flash point, suitable for engineering applications that need to isolate high temperature or flame.

S1~S3‧‧‧flow chart

FIG. 1 is a flow chart showing a manufacturing method of a composite material having both heat resistance and fire resistance.

The detailed description and technical contents of the present invention will now be described with reference to the following drawings: FIG. 1 is a flow chart showing a manufacturing method of a composite material having both heat resistance and fire resistance.

First, a raw material is mixed with a solvent to form a mixture (S1). The raw material comprises: 1 to 33 weight percent of aerogel, 20 to 70 weight percent of oxide, 5 to 20 weight percent of gypsum, and 5 to 33 weight percent based on 100% by weight of the total weight of the raw material. A hydroxide based inorganic resin.

In one embodiment of the invention, the amount of the cuffing agent is preferably between 5 and 17 weight percent. The gas condensing agent is selected from the group consisting of a cerium oxide gas condensing agent, a carbon dioxide gas condensing agent, a metal gas condensing agent, an oxide gas condensing agent, and combinations thereof. The raw material of the present invention is not limited to the addition of a gas condensing agent. In other embodiments, two, three, or four kinds of gas condensing agents may be selected according to requirements, for example, simultaneously using a cerium oxide gas condensing agent and The carbon dioxide gas condensing agent; or the simultaneous use of a cerium oxide gas condensing agent, a carbon dioxide gas condensing agent, a metal gas condensing agent, and an oxide gas condensing agent, is not particularly limited in the present invention.

In one embodiment of the invention, the oxide is preferably present in an amount between 50 and 60 weight percent. The oxide is selected from the group consisting of oxides of metals consisting of titanium, aluminum, calcium, potassium, lithium, rare earth metals, cerium, silicon, and combinations thereof. For example, such as titanium dioxide, aluminum oxide, calcium oxide, potassium oxide, lithium oxide, cerium oxide, cerium oxide, cerium oxide, cerium oxide, cerium oxide, cerium oxide, etc., but the invention is not limited to the metal oxidation listed above Things. In addition, more than one metal oxide may be included in the embodiment, and more specifically, may include titanium metal oxide, aluminum metal oxide, calcium metal oxide, iron metal oxide, potassium metal oxide, lithium metal oxide. Or one of the rare earth metal oxides; in another embodiment, more than two metal oxides may be included; in another embodiment, more than three metal oxides may be included; in another implementation In the example, more than four metal oxides may be included; in yet another embodiment, the above seven metal oxides may be included at the same time. In this embodiment, the raw material includes titanium metal oxide, aluminum metal oxide, calcium metal oxide, iron metal oxide, potassium metal oxide, lithium metal oxide, or rare earth metal oxide. In one embodiment of the invention, the oxide is in the form of a hollow particle and is a hollow particle having a nanometer size.

In one embodiment of the invention, the gypsum may be a polymeric gypsum, preferably in an amount between 10 and 15 weight percent. The content of the hydroxide-based inorganic resin is preferably between 10 and 20% by weight, and the hydroxide-based inorganic resin may be a hydroxide-based resin.

In one embodiment of the invention, water is used as a solvent and mixed with the raw material in a ratio of between 1:10 and 1:1 to form the mixture. The mixing ratio of the raw material and the solvent in the present invention is not limited to being mixed in the above ratio, and those skilled in the art can formulate according to actual needs.

After the raw material is mixed with the solvent to form the mixture, the mixture is poured into a mold (S2). In the present invention, the type and material of the mold to be used are not particularly limited as long as the material of the mold is used. Anyone who does not react with the mixture and can stably accommodate the mixture can be used.

Finally, after drying, the mold is released to obtain a green embryo, and the green body is sintered to obtain the composite material (S3) having both heat resistance and fire resistance. In one embodiment of the present invention, the sintering temperature is between 100 ° C and Between 800 ° C, for example, sintering can be carried out in an air environment at 600 ° C.

The composite material obtained by the production method of the present invention does not contain heavy metals and harmful solvents in raw materials or in the manufacturing process, and does not cause environmental pollution. Moreover, the composite material can be recycled. For example, if the composite material is damaged or damaged, it can be granulated and sintered again, that is, reused, for example, as a recycled building material. For the above reasons, the composite of the present invention is more environmentally friendly than conventional asbestos or rock wool products.

In addition, in the selection and matching of the permeating materials of the present invention, the obtained composite material has a closed porous structure, and the closed-type porous structure referred to in the present invention means that the composite material has a plurality of large pores. The parts are not connected, and the nanocrystalline solid cells in the raw materials are clustered together after sintering to form a low-density nanoporous network, so that the composite has light weight, low thermal conductivity, heat insulation, and weather resistance. , fire resistance and hydrophobicity, fire resistance up to 1000 ° C, no flash point, suitable for engineering applications that need to isolate high temperature or flame, such as chemical plants, petrochemical plants or steel plants, etc. External heat and fireproof materials to protect the safety of factory personnel.

The present invention has been described in detail above, but the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention. That is, the equivalent changes and modifications made by the scope of the present application should remain within the scope of the patent of the present invention.

S1~S3‧‧‧flow chart

Claims (7)

A method for manufacturing a composite material having both heat resistance and fire resistance, comprising the steps of: mixing a raw material with a solvent to form a mixture; and drying to obtain a green embryo, and sintering to obtain the composite of heat resistance and fire resistance. a material; wherein, based on 100% by weight of the total weight of the raw material, the raw material comprises: 1 to 33% by weight of aerogel; 20 to 70% by weight of oxide; 5 to 20% by weight of gypsum; Up to 33% by weight of a hydroxide-based inorganic resin, which is a hydroxide-based resin; wherein the composite material has a closed-type porous structure. The manufacturing method of claim 1, wherein the aerogel is selected from the group consisting of cerium oxide aerogel, carbon dioxide aerogel, metal aerogel, oxide aerogel, and combinations thereof. Group of. The manufacturing method according to claim 1, wherein the oxide is selected from the group consisting of titanium dioxide, aluminum oxide, calcium oxide, potassium oxide, lithium oxide, rare earth metal oxide, cerium oxide, cerium oxide, and combinations thereof. The group formed. The manufacturing method according to claim 1, wherein the oxide is a hollow particle. The manufacturing method according to claim 1, wherein the sintering temperature is between 100 ° C and 800 ° C. A composite material having both heat resistance and fire resistance, which is obtained by the method of any one of claims 1 to 5. The composite material according to claim 6 has a closed-type porous structure.