JPS595153B2 - Binder composition - Google Patents

Description

[Detailed description of the invention] BINDER COMPOSITIONS FIELD OF THE INVENTION The present invention relates to binder compositions.

Generally, binders are mixed with raw materials in order to increase the degree of bonding and strength of sintered or molded products in ceramics, mineral processing, building material manufacturing processes, and the like.

As examples of such binders, clays, lime, sodium silicate or cement, synthetic resins, tar, pitch, etc. are conventionally known. These various binders are blended with various inorganic and organic aggregates to obtain products such as molded articles. However, when applying the above conventional binder to inorganic aggregate, clay as a binder,
When using an inorganic binder such as lime, the resulting product is nonflammable, but has the disadvantage of being hard and brittle.
It has no flexibility.

Furthermore, when an organic binder such as a synthetic resin or tar is used, flexibility can be imparted to the product, but there is a drawback that it does not have sufficient resistance to heat and flame. That is, it has been impossible to apply conventional binders to inorganic aggregates and impart both nonflammability and flexibility to the resulting product at the same time. Furthermore, when applying the above-mentioned conventional binder to organic aggregate, it is difficult to impart nonflammability or flame retardance to the resulting product even if an inorganic binder is used as the binder, and furthermore, it is difficult to impart nonflammability or flame retardance to the product, and furthermore, it is difficult to impart nonflammability or flame retardance to the product, even if an inorganic binder is used as the binder. Flexibility, texture, etc. are impaired.

Also, when using an organic binder, the flexibility of the product 15
However, it has the disadvantage of being easily flammable and having extremely low resistance to heat and flame. In other words, when conventional binders are applied to organic aggregates, they impart non-flammability or flame retardancy to the resulting product, while at the same time retaining the original flexibility and texture of the organic aggregates. It was impossible. The object of the present invention is to provide a completely new binder composition that can successfully overcome the above-mentioned conventional drawbacks and impart flexibility as well as non-flammability or flame retardancy to the resulting product. .

H5 That is, the present invention is based on calcium chloride, tin chloride, iron chloride,
In methanol or ethanol or a mixed solution of at least one of zinc chloride and magnesium chloride,
The present invention relates to a binder composition characterized in that a linear polyamide is dissolved therein. 30 The binder of the present invention exhibits an excellent binding effect on inorganic aggregates as well as organic aggregates, and can easily provide molded products with high strength.

And when this binder is applied to inorganic aggregates, it is surprisingly possible to achieve the
It is possible to obtain a product that has both nonflammability and flexibility, which could not be achieved in 5. Furthermore, when this binder is applied to organic aggregate, the resulting product is nonflammable and flexible. It has been found that the original flexibility and texture of organic aggregates can be maintained as they are while imparting flame retardancy.

The reason why the binder of the present invention exhibits the excellent binding action and the various remarkable effects mentioned above is not fully understood, but the reason is that the chloride used and the -CONH group of the linear polyamide coordinate to form a chelate. It is thought that a complex salt is formed by forming a bond, thereby exhibiting excellent nonflammability or flame retardancy.

In addition, since the flexibility of the linear polyamide itself is maintained at this time, it is presumed that products obtained by applying the present binder also maintain excellent flexibility and texture. The present invention is based on this new discovery. The binder of the present invention will be described in detail below.

First, the chlorides used in the present invention are calcium chloride, tin chloride (including SnCl2 and Sncl4), iron chloride (
(including FeCl2 and FeCl3), zinc chloride, and magnesium chloride, and these chlorides may be used alone or in combination of two or more. Among these chlorides, calcium chloride and zinc chloride are particularly preferred from the viewpoint of availability. Methanol and ethanol are used as the alcohol, and alcohols having a larger number of carbon atoms than these are undesirable because the solubility of the chloride is poor. Although such methanol and ethanol can be used alone, they can also be used in combination. Linear polyamides (hereinafter simply referred to as polyamides) include polymers commonly called nylons, and typical examples of these include nylon-6, nylon-6/6, nylon-6/101 nylon- Examples include 11 and nylon-12. In the present invention, the concentration of chloride in the alcohol may be determined as appropriate depending on the type of chloride used, but it is preferably about 5% by weight or more up to saturation concentration, usually about 5 to 30% by weight. It is desirable to do so. When the concentration of chloride is within this range, the solution finally obtained is stable and no solid matter is precipitated in the solution, and the viscosity of the solution does not become too high, which is preferable.
In the present invention, to dissolve chloride in alcohol,
This can be easily done by stirring and mixing at room temperature. In the present invention, the amount of polyamide to be used is preferably such that approximately 1 to 2 CONH groups are present in the polyamide per mole of the chloride.

When the amount of polyamide used is within this range, it is preferable because the dissolution rate of the polyamide does not decrease rapidly.
To dissolve polyamide in an alcoholic solution of chloride, the polyamide may be placed in the solution and heated and stirred preferably at a temperature near the boiling point of the alcohol used. In the present invention, the solution obtained above can be used as a binder for various aggregates.

The solid content concentration and viscosity in the binder of the present invention are as follows:
Although it can be selected and adjusted as appropriate depending on the type and shape of the aggregate to be applied, the solid content concentration is usually about 20 to 70% by weight, preferably about 30 to 40% by weight, and the viscosity is about 500 to 10% at 20°C.
10,000 Cpsl, preferably in the range of about 10,000 to 80,000 Cps. Examples of aggregates to which the binder of the present invention can be applied include various general-purpose inorganic aggregates and organic aggregates.

Typical examples of inorganic aggregates include asbestos, glass fiber, perlite, and the like. Such asbestos and glass fibers can be used without any restrictions on their type, thickness, fiber length, etc., and both pearlite-fired and unfired forms can be used. These inorganic aggregates can be used alone or in combination. The ratio of this binder to inorganic aggregate depends on the properties required for the intended molded product (e.g. flexibility, strength, etc.), the type of inorganic aggregate, the solid content concentration and viscosity of the binder used, etc. Although the binder can be selected as appropriate, it is generally preferable to use about 20 to 400 parts by weight of the binder as a solid content per 100 parts by weight of the aggregate. Regarding individual aggregates, for example, when asbestos is used, the binder is usually used in a solid content of about 20 to 140 parts by weight, preferably about 50 to 100 parts by weight, per 100 parts by weight of asbestos. When using fibers, the binder is usually about 30 to 140 parts by weight as solids per 100 parts by weight of the fibers.
Preferably about 40 to 100 parts by weight, and in the case of pearlite, the binder is usually about 120 to 400 parts by weight, preferably about 140 to 30 parts by weight, based on 100 parts by weight of pearlite.
It is desirable to use 0 parts by weight. Typical examples of organic aggregates include wood chips, cork powder, fiber pile, paper, and the like.

In addition to these materials, crushed materials such as plastic and rubber can also be used. Examples of wood chips include flaky wood chips such as planer chips and sawdust. Various types of cork powder can be used, but those with a particle size of approximately 0.5 to 10 mm are particularly preferred. Examples include various fibers such as wool, cotton, and rayon, with fiber lengths of approximately 1 to 30 mm being particularly preferred. The paper is preferably in the form of strips with a width of about 1 to 20 mm, and a length of about 1 to 30 mm. These organic aggregates can be used alone or in combination. The ratio of the present binder and organic aggregate can be selected and determined as appropriate depending on the flammability required for the intended molded product, the type of organic aggregate, the solid content concentration and viscosity of the binder used, etc. Generally, it is preferable to use about 30 to 200 parts by weight of the binder as a solid content per 100 parts by weight of the aggregate. Regarding individual aggregates, for example, when wood chips are used, the binder is usually about 50 to 200 parts by weight solids, preferably about 100 to 16 parts by weight, based on 100 parts by weight of wood chips.
When using cork powder, the binder is usually about 30 to 80 parts by weight, preferably about 40 to 70 parts by weight, in solids per 100 parts by weight of cork powder, and in the case of fiber pile. For paper, the binder is usually about 40 to 100 parts by weight, preferably about 50 to 90 parts by weight, and in the case of paper, the binder is usually about 40 to 100 parts by weight, preferably about 50 to 90 parts by weight. It is desirable to use 60 to 200 parts by weight, preferably about 120 to 150 parts by weight. When applying the binder of the present invention to aggregate,
Furthermore, various usual additives such as fillers and pigments may be added.

In addition, it is also possible to use other known conventional binders within a range that does not impair the characteristics of the present invention. Examples of fillers and pigments include calcium carbonate, calcium silicate, talc, clay, calcium sulfate, calcium hydroxide, titanium oxide, carbon black, and red iron. The binder of the present invention can be easily applied to commonly used molding means. For example, it can be mixed and stirred as is with various aggregates and, if necessary, the above-mentioned additives using a stirrer (for mixing liquids), and then the desired Pressure molding at a pressure of about 40 to 80k9/Cd in a mold of
A molded product can be easily obtained by air drying or drying at a low temperature of 70° C. or lower.

Further, depending on the properties of the intended molded product, if necessary, secondary pressing may be performed using a high pressure of about 100 to 150 k9/Crli. At this time, as the aggregate, inorganic aggregate and organic aggregate may be used alone, or they may be used in combination. Examples are shown below to further clarify the excellent effects of the binder of the present invention.

Note that % simply represents weight %. Example
1 ZnC12 (1st class reagent) 6007 with methanol 1200
Nylon-6 (
Ube Industries, Ltd. product, trade name UBElOl3Bl molecular weight 13000) 226y was added, and 30
The mixture was stirred in a flask at about 67° C. for 10 hours to obtain a slightly viscous binder of the present invention.

The solid content concentration of the obtained binder was 40.7%, and the viscosity was 500 cps/20°C. The molar ratio of Zncl2 and nylon-6 was 1:0.45. Asbestos (Canadian Quebec Standard 6) was added to 450 tons of the resulting binder.
Add 300 t of D) into a stirrer (manufactured by Shinagawa Kogyo Co., Ltd., Universal Mixer Stirrer 5DM), and after mixing and stirring for 10 minutes,
The contents were taken out and placed between two iron plates and pressurized for 1 minute at approximately 50k9/CrA using a scissors press to approximately 25CIrL×
It was molded to a size of 25CrfL x 4.0 (using a release cloth).

After drying at room temperature for 48 hours, it was further sandwiched between iron plates and subjected to secondary pressing at room temperature at 100 kg/Cd for 2 minutes using a press to obtain a plate-shaped molded product. Examples 2 to 3 A binder of the present invention was obtained in the same manner as in Example 1 using each component shown in Table 1.

As the polyamide, the same nylon-6 as in Example 1 was used, and as for the chlorides, 1st class reagents were used. Using the obtained binder, each inorganic aggregate shown in Table 2 was molded in the same manner as in Example 1. The molding conditions are also shown in Table 2. The physical properties of the flame retardant boards obtained in Examples 1 to 3 are shown in Table 3 below.

Flexibility was determined in accordance with the bending test for architectural boards (using No. 5 test specimen) stipulated by JISA Al4O8 (1964), and flame retardancy was determined in accordance with JISA Al32l (1959) (540 ℃ for 7 minutes). Example 4 CaC12 (1st class reagent) 2207 methanol 1200
Nylon-6 (
Ube Industries Co., Ltd. product, UBElOl3B, molecular weight 130
00) was added (molar ratio 1:1) and stirred for 8 hours at about 67° C. in a 30 flask equipped with a reflux condenser to obtain a slightly viscous binder of the present invention.

The solid content concentration of the obtained binder was 27%, and the viscosity was 700.
It was 0 cps/20°C. 75 of the resulting binder
0y wood chips (cedar wood electric planer scraps: 10-60m77!
200 tons of flakes) were added in a stirrer (manufactured by Shinagawa Kogyo Co., Ltd., Universal Mixer Stirrer 5DM), and after mixing and stirring for 10 minutes,
Pressure is applied between two iron plates with a release cloth attached at 60kg/Cd using a press machine, resulting in approximately 25Cr! L×25CT
ILX1? After drying at room temperature for 48 hours, it was further molded with a surface pressure of 150 kg/Cd using a high pressure press machine for rubber plates.
Pressure was applied for a minute to obtain a plate-like bulky molded product.

Examples 5 to 8 Binder of the present invention was prepared according to the procedure of Example 4 using the binder composition shown in Table 4.

Molded products were obtained according to Example 4 using the obtained binder and each organic aggregate shown in Table 5. The physical properties of the molded product are shown in Table 6. Test method (1) Impact strength: Measured according to the Schalpi impact test.

Flame retardancy: Tested according to JIS Al322 (Test method for flame retardancy of thin materials for construction) using a heating time of 2 minutes.

Claims (1)

[Claims] 1. A binder composition comprising a cotton-like polyamide dissolved in methanol, ethanol, or a mixed solution of at least one of calcium chloride, tin chloride, iron chloride, zinc chloride, and magnesium chloride.