Curable composition containing as constituent material silica obtained by decomposing chrysotile and cured object

A composition and technology of chrysotile, which is applied in the field of construction and civil engineering, can solve the problems of not being specific enough in application, and achieve the effects of improving structural stability, easy construction, and eliminating environmental pollution

Inactive Publication Date: 2007-10-03
NOZAWA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these applications are not specific enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Example 1 (basic properties and biological impact)

[0080] 1. Raw material of the sample

[0081] 1) Serpentinite collected from Furano-city, Hokkaido and ground to 20 mesh or smaller.

[0082] 2) Chrysotile collected from Canada (grade: 4-grade)

[0083] 3) Asbestos recovered by feeding corrugated asbestos sheets (20 years after construction: product of Nozawa KK) into a grinding and separating device for recovering asbestos from serpentinite.

[0084] 2. Sample Processing

[0085] The above materials in an amount of 110 kg each were put into an acid solution containing 220 kg of water and 130 kg of 98% sulfuric acid, and heated at 100° C., followed by stirring for 2 hours for decomposition.

[0086] The slurry obtained by decomposition was collected by using a filter press, and the residue was washed with water until the flushing liquid was neutral, then dried in a hot air drier at 100° C. for 24 hours, and then ground to 200 mesh or more by using a ball mill. Lo...

Embodiment 2

[0105] Embodiment 2 (application of silica: wet type decoration material)

[0106] (Preparation of test material)

[0107] The silica of Example 1-1 and the silica of Example 1-2 were mixed with the components shown in Table 2, then an appropriate amount of water was added thereto, and each of the materials thus obtained was 9 mm in thickness and 910 mm in length, and a gypsum board with a width of 1,820 mm was applied with a 3 mm thick coating to evaluate workability and properties as a humidity-regulating interior finishing material. A commercially available material comprising diatomaceous earth was used as a comparative example.

[0108] Evaluation was performed in accordance with JIS A 6909. The test method according to JIS A 6909 is shown in Table 3, and the evaluation results are shown in Table 2.

[0109]

Material

Example

2-1

Example

2-2

Example

2-3

Example

2-4

Comparative example 2-1

...

Embodiment 3

[0116] Example 3: Properties as dry decorative material (moisture absorption / desorption properties of fibrous silica and strength of cured material)

[0117] The silica of Example 1-1, the silica of Examples 1-3, and commercially available diatomaceous earth were mixed with the components shown in Table 4, followed by adding an appropriate amount of water thereto and kneading. Each kneaded material is added into the mold cavity, and then compression molded into a width of 50mm, a length of 200mm, and a thickness of 10mm (molding pressure: 2N / mm 2 ). The modules were left to cure in a room at 20°C for 2 weeks, and then subjected to performance testing.

[0118] The test results are shown in Table 4.

[0119]

Material

Example

3-1

Example

3-2

Example

3-3

Example

3-4

comparative example

3-1

composition

Silica (1-1)

100

70

-

30

-

Silica (1-3)

...

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Abstract

Chrysotile or serpentine containing chrysotile is treated to convert the chrysotile contained therein into a non-asbestos material. The non-asbestos material is a useful material which can be safely reclaimed and used. It is effective from the standpoint of an environmental measure. [MEANS FOR SOLVING PROBLEMS] A curable composition characterized by at least containing reinforcing fibers and porous fibrous amorphous silica which is obtained by decomposing chrysotile or chrysotile-containing serpentine with an acid to substantially eliminate the influence of the asbestos on the living body. The curable composition preferably contains a surfactant and a thickener and / or a filler and / or a colorant. It preferably contains an air-hardening material and / or hydraulic material and a thickener. The composition preferably comprises 15-100% porous fibrous amorphous silica obtained by decomposing chrysotile or chrysotile-containing serpentine with an acid, 0-75% slaked lime, 0-3% thickener, and 0-10% pulp.

Description

technical field [0001] The present invention relates to a curable composition containing silica obtained by decomposing chrysotile as a constituent material, and also to a coating composition and a cured material obtained by using the curable composition, which can be used for construction and civil engineering Background technique [0002] Recently, in detached houses and collective housing, new building materials such as vinyl cloth and printed plywood have come to be used as interior materials for decorating wall surfaces and roofs of houses from the standpoint of construction and economic efficiency. However, trace amounts of chemical substances such as formaldehyde, ammonia, and organic solvents remain in these construction materials, and it has been pointed out that gases released into houses from these chemical substances pollute houses. Chemical substances remaining in trace amounts are harmful to humans and can cause allergic reactions, atopic dermatitis, asthma, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12C04B14/04C04B16/02C04B24/38C04B28/12C09D1/00E04F13/02C09D7/43C09D7/45C09D7/61
CPCC01B33/12A62D3/33A62D3/36A62D2101/41A62D2203/04B01J20/103B01J20/28023B09B3/0066C04B14/40C04B14/4631C04B28/10C04B28/105C04B28/14C04B2111/00482C08K3/36C08K7/10C08K7/26C09D1/00C09D1/10C09D7/1291E04F13/02E04F15/12C09D7/70C09D7/61C09D7/45C09D7/43Y02W30/91C04B20/023C04B18/241C04B24/2641C04B24/38C04B2103/302C04B2103/44C04B2103/54C04B20/0056
Inventor 安随政彦岛村哲也山下喜世次
Owner NOZAWA CORP
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