CN1117987A

CN1117987A - Quick-drying multi-function thermal-insulation material

Info

Publication number: CN1117987A
Application number: CN 94112482
Authority: CN
Inventors: 徐中
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-08-31
Filing date: 1994-08-31
Publication date: 1996-03-06

Abstract

The present invention relates to a quick-drying multifunctional heat-insulating material using asbest, aluminosilicate fibre, expanded perlite and bentonite as matrix materials, using saponated rosin, etc. as foaming agent, using polyvinyl alcohol, polyethylene oxide and methyl cellulose, etc. as foaming stabilizing agent and using magnesium chloride and magnesium oxide as quick-drying agent. As compared with the previous similar heat-insulating materials said it has the advantages of rapid drying speed, convenient construction and extensive application field.

Description

Quick-drying type multifunctional heat-insulating material

The invention relates to a quick-drying multifunctional heat-insulating material which is widely used as a heat-insulating and heat-preserving wall material and a heat-insulating and sound-insulating wall material for heat transmission equipment such as pipelines and valves.

In the prior art, the heat preservation and insulation materials using asbestos, alumina silicate fiber and the like as matrix materials, such as the technical products disclosed in Chinese patent application numbers 87101962A, 88100561.4 and 90109564.8, the drying and curing time of the products is 30-48 hours, thereby influencing the construction of the heat preservation and insulation materials and the production efficiency of sectional materials. The inorganic foam thermal insulation material which is disclosed in Chinese patent application No. 88107041.6 and is produced by taking inorganic magnesium oxide and magnesium chloride as matrix materials has the curing and forming time of 12-24 hours due to the magnesium oxide and magnesium chloride materials, but also has the defects of brittle materials and poor thermal insulation effect.

The invention aims to solve the defects of the existing product, and accelerates the drying and curing speed of the product by adding the quick-drying agent, thereby achieving the purposes of good heat preservation, heat insulation and sound insulation effects of the product, convenient construction and high construction and product production efficiency.

The quick-drying multifunctional heat-insulating material is formed from matrix material, foaming material and foaming stabilizing agent, and is characterized by that in the above-mentioned composition 1-7% of mixed quick-drying agent of magnesium chloride and magnesium oxide is added. The matrix material may be asbestos, alumina silicate fiber, expanded perlite, bentonite and other necessary material and hollow bead, diatomite, soil-like graphite and other unnecessary material. Asbestos and aluminum silicate fiber are subjected to soaking and cotton opening pretreatment by using a penetrant T; the foaming agent can be a mixture or one of saponified rosin, sodium dodecyl benzene sulfonate and sodium humate; the foaming stabilizer can be a mixed adhesive comprising polyvinyl alcohol, polyethylene oxide, methyl cellulose and a high-temperature adhesive (the product is produced by Jiangsu Yixing energy-saving material factories).

In order to make the heat-insulating material of the invention have better curing strength, 2-5% of 500 # reinforced cement can be added into the composite material; meanwhile, in order to make the material have waterproof performance, 0.5-1% of a waterproof agent (which is a product of seven chemical plants in Beijing) can be added into the reinforced composite material or the waterproof agent is coated outside after the construction and curing molding of the reinforced material.

The magnesium chloride can be commercial magnesium chloride with Baume degree of 22-25 degrees; themagnesium oxide can be magnesium oxide with the content of more than 85 percent and the granularity of more than 200 meshes. The added magnesium chloride and magnesium oxide absorb water molecules in the composite material to carry out the following chemical reactions:

the resultant is characterized as a set, which not only absorbs a large amount of moisture, but also has a curing enhancing effect on the entire material. The curing and drying time of the composite material added with the magnesium chloride and the magnesium oxide early drying agent is about 8 to 10 hours, and the curing and drying speed is improved by 4 to 6 times compared with the prior product. The invention not only keeps the excellent effects of heat preservation and heat insulation of the heat preservation and heat insulation material, but also brings convenience for direct construction by using the material, improves the construction efficiency and can also improve the production efficiency of material forming. The examples of the invention are as follows (taking 600 kg of product as an example):

1. adding 80 kg of water into 8 kg of penetrant T, uniformly mixing, adding 10 kg of aluminum silicate fiber, and soaking for 24 hours for later use;

2. adding 2 kg of water into 2 kg of polyvinyl alcohol, and stirring into a colloid at a high temperature for later use;

3. 0.5 kg of polyethylene oxide and 0.5 kg of methyl cellulose are taken, 20 kg of water is added for stirring evenly, and the mixture is placed for 2 hours.

4. 340 kg of water is added into a stirrer, the soaked aluminum silicate fiber is poured, the stirrer is started to stir, 50 kg of asbestos after opening cotton and 45 kg of expanded perlite powder are added at the same time, and the stirring is carried out for about 10 minutes.

5. 4 kg of polyvinyl alcohol glue solution and 21 kg of mixed slurry of polyethylene oxide and methyl cellulose are added, 5 kg of diatomite, 10 kg of cenospheres, 10 kg of bentonite and 0.5 kg of sodium humate are added, and the mixture is stirred for 15 minutes.

6. 3 kg of high-temperature adhesive liquid is added and stirred for 10 minutes, and then the existing common heat preservation and insulation material is finished.

7. 6 kg of magnesium chloride with the Baume degree of 22-25 and 2 kg of magnesium oxide with the content of more than 85 percent are added and stirred evenly.

8. In order to increase the strength and make the product have water-proofing property, 3 kg of water-proofing agent and 15 kg of 500 # cement are added from step 6.

At this time, the production of the quick-drying multifunctional heat-insulating material provided by the invention is completed.

Claims

1. The quick-drying multifunctional heat-insulating material is characterized by that it uses asbestos and aluminium silicate fibre as base material, uses saponified rosin as foaming agent and uses polyvinyl alcohol as foaming stabilizer, and is characterized by that in the above-mentioned composite heat-insulating material 1-7% of magnesium chloride and magnesium oxide mixed quick-drying agent is added.

2. The quick-drying multifunctional thermal insulation material as claimed in claim 1, wherein the matrix material comprises indispensable materials such as asbestos, alumina silicate fiber, expanded perlite, bentonite, etc., unnecessarymaterials such as hollow micro-beads, diatomite, soil-like graphite, etc., and penetrant T for soaking the asbestos, alumina silicate fiber; the foaming agent is a mixture or one of saponified rosin, sodium dodecyl benzene sulfonate and sodium humate; the foaming stabilizer comprises a mixed adhesive of polyvinyl alcohol, polyethylene oxide, methyl cellulose and a high-temperature adhesive.

3. The quick-drying multifunctional thermal insulation material according to claim 1 or 2, characterized in that 2-5% of reinforced cement with 500 # or more is added to the composite thermal insulation material.

4. The quick-drying multifunctional thermal insulation material as claimed in claim 3, wherein 0.5-1% of water repellent is added to the reinforced material.