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Inorganic foaming heat-insulation material and preparation method thereof

A thermal insulation, inorganic foaming technology, applied in ceramic products, other household appliances, household appliances, etc., can solve the problems of easy breeding of bacteria, poor heat resistance, polluted air, etc., and achieve good hole sealing effect and improve strength. Effect

Inactive Publication Date: 2012-06-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, although organic materials have good thermal insulation and low density, they have poor heat resistance and are easy to burn. They also release a lot of heat and produce a lot of toxic smoke when burning, which will not only accelerate the spread of the fire, but also easily cause casualties.
However, although the existing inorganic materials have good heat resistance and flame retardant effects, there are fine fibers, which not only pollute the air but also easily breed bacteria, which has become a hidden danger that endangers people's health.
Therefore, none of the materials currently used can fully meet the requirements of energy saving, heat preservation, fire prevention, and pollution-free, which has caused some confusion in design and construction.

Method used

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  • Inorganic foaming heat-insulation material and preparation method thereof
  • Inorganic foaming heat-insulation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0028] 1) Fully mix 100 parts of water glass and 1 part of azodicarbonamide, and place it at room temperature for 60 hours to obtain a white viscous slurry;

[0029] 2) In the above slurry, add 1 part of lithium petalite powder, 3 parts of hydroxypropyl methylcellulose, 1 part of vinyl acetate-ethylene copolymer emulsion (solid content 50%), 5 parts of hollow glass microspheres ( The particle size is 65~120μm), fully stirred;

[0030] 3) Pour the mixed slurry prepared in step 2) into a mold, bake in an oven, heat up to 700°C for 11 hours, keep the temperature constant for 1 hour, and shape;

[0031] 4) After the molding is completed, cool, take out of the furnace, and demould to obtain an inorganic foaming material;

[0032] 5) The bulk density of the thermal insulation material prepared by this method is 333.24kg / m 3 , an inorganic foaming material with a compressive strength of 2.55MPa and a thermal conductivity of 0.072W / m·K.

specific Embodiment 2

[0033] 1) Fully mix 80 parts of water glass and 5 parts of azodicarbonamide, and place at room temperature for 48 hours to obtain a white viscous slurry;

[0034] 2) Add 1 part of mullite quartz powder, 1 part of polyvinyl alcohol, and 3 parts of hollow glass microspheres (60-115 μm in particle size) into the above slurry, and stir thoroughly;

[0035] 3) Pour the mixed slurry prepared in step 2) into a mold, bake in an oven, heat up to 500°C for 8 hours, keep the temperature for 1 hour, and shape;

[0036] 4) After the molding is completed, cool, take out of the furnace, and demould to obtain an inorganic foaming material;

[0037] 5) The bulk density of the thermal insulation material prepared by this method is 289.14kg / m 3 , an inorganic foaming material with a compressive strength of 1.91MPa and a thermal conductivity of 0.069W / m·K.

specific Embodiment 3

[0038] 1) Fully mix 90 parts of water glass and 2.5 parts of azodicarbonamide, and place it at room temperature for 48 hours to obtain a white viscous slurry;

[0039] 2) In the above slurry, add 2 parts of cordierite powder, 2 parts of polyvinylpyrrolidone, 1 part of acrylic emulsion (solid content 40%), 8 parts of floating beads (particle size is 120 ~ 550 μm), fully stir, get mixed pulp;

[0040] 3) Pour the mixed slurry prepared in step 2) into a mold, bake in an oven, heat up to 400°C for 6 hours, keep the temperature for 1 hour, and shape;

[0041] 4) After the molding is completed, cooling and demoulding are performed to obtain an inorganic foaming material;

[0042] 5) The bulk density of the thermal insulation material prepared by this method is 307.02kg / m 3 , an inorganic foaming material with a compressive strength of 2.39MPa and a thermal conductivity of 0.065W / m·K.

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Abstract

The invention relates to an inorganic foaming heat-insulation material and a preparation method thereof. The preparation method of the inorganic foaming heat-insulation material comprises the following steps of mixing 80 to 100 parts of water glass, 0.2 to 5 parts of a foaming agent, 1 to 3 parts of mineral powder, 1 to 3 parts of a water-soluble polymer, 0 to 1 part of emulsion and 0 to 10 parts of hollow glass beads or floating beads at a normal temperature, and carrying out heating foaming of the mixture. The inorganic foaming heat-insulation material has the characteristics of light weight, high strength, small heat conductivity, flame-retardant properties, no toxicity and no pollution. The preparation method adopts the raw materials which are cheap and can be acquired easily, has simple processes, and can realize the preparation of products having different shapes and specifications according to actual requirements. The inorganic foaming heat-insulation material obtained by the preparation method can be widely utilized for equipment and buildings.

Description

technical field [0001] The invention relates to an inorganic foaming thermal insulation material and a preparation method thereof. Background technique [0002] In recent years, major fire accidents caused by the burning of building exterior wall insulation materials have occurred continuously, resulting in serious casualties and property losses. In 2009, a serious fire accident occurred in the new building of CCTV. The curtain wall insulation material not only failed to play the role of heat insulation and fire prevention, but increased the burning and collapse, causing extremely serious losses; in 2010, the "11· The 15” large fire and the large amount of flammable materials such as nylon mesh and polyurethane foam used at the accident site were the main reasons for the rapid spread of the fire. Similar accidents abound. Building flammable and combustible external wall insulation materials have become a new type of fire hazard. [0003] Therefore, the Fire Department of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/26
Inventor 史翎石丹张军营程珏
Owner BEIJING UNIV OF CHEM TECH
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