JPS59173202A - Hydraulic metal composition - Google Patents

Abstract

PURPOSE:To make it possible to regulate the curing time or strength of a hydraulic metal composition, by mixing amino group-containing carboxylic acid or amino group-containing sulfonic acid to a Mn-powder of a Mn-containing alloy powder in a specific ratio. CONSTITUTION:A hydraulic metal composition is prepared by mixing amino group-containing carboxylic acid or amino group-containing sulfonic acid with a Mn powder of a alloy powder containing 0.2wt% or more of Mn in a wt. ratio of 100:0.01-20. When this composition is kneaded with water to be cast into a mold, exothermic reaction is generated to raise the temp. of the kneaded mixture and the injection of steam forcibly starts. When the injection of steam is stopped and curing is completed, a cured body similar to a cast article can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION An object of the present invention is to provide a hydraulic metal composition that has many properties not available with conventionally used hydraulic materials. Up until now, when trying to obtain a product with the desired shape and dimensions by pouring metal into a mold, there has been a casting method in which metal is heated and melted and then poured, or a metal powder with a small amount of liquid binder added is poured in and the binder hardens. There was only one way to take it out. The former has various advantages in that the product is 100% metal, but disadvantages tend to arise regarding the equipment required for melting and the time required for melting. Furthermore, the latter has the disadvantage that the properties of the binder generally have an extreme effect on the properties of the product, and the performance exhibited by the metal alone is often almost completely lost. but,
By simply kneading the composition of the present invention with an appropriate amount of water and pouring it into a mold, it is possible to obtain a cured product that closely resembles a cast product, and it is also possible to adjust the curing time and strength. For this reason, it is suitable as a material for manufacturing various molds, which previously required a great deal of time and expense. The curing process will be explained below using examples.

Example 1. In this example, various amino acids and manganese powder obtained by electrolytic method were mixed at a weight ratio of 2:100, stirred thoroughly, and then ground to homogenize. This is an observation of the curing process when water is poured and stirred. Incidentally, unless otherwise specified, the manganese powder used in this example and the following examples means that which passed through a 200 mesh sieve. The scale of the experiment was to use 10 g of amino acid-manganese powder mixture and 1.6 ml of water. There are three things to observe: the start of an expansion phenomenon, which can be seen from the appearance of a chemical reaction, the start of a strong jet of water vapor due to a rise in temperature due to an exothermic reaction, and the cessation of the jet of steam and the formation of a hardened product.

The numbers in the table are the number of seconds from the time of water injection.

In this table, the * in the rightmost column indicates an example in which a firm and normal cured product was produced. This shows that those without the expansion phenomenon observed as an initial process do not become normal hardened bodies. Ordinary amino acids such as glycine, alanine, and histidine harden through a process of expansion, steam eruption, and cessation of steam generation (hardening), but d,l-phenylglycine and l-phenylglycine, which contain a benzene nucleus in the molecule, harden.
- Phenylalanine and anthranilic acid do not expand at all,
There is only a weak reaction course and no hard cured product is produced. Furthermore, d,l-α-aminobutyric acid does not expand at all and has 90
The resulting product after the reaction has stopped in seconds is likely to turn into powder due to abrasion, but 4-aminobutyric acid and ε-aminocaproic acid, which have an amino group at the terminal end, produce a firm hardened product. Like γ-amino β-hydroxybutyric acid,
Those with an OH group follow a slower reaction process than the corresponding amino acid γ-aminobutyric acid, but
Almost the same cured product is obtained. Dimethylglycine and nicotinic acid, unlike amino acids containing a benzene nucleus, produce normal hardened products, and the reaction process of the latter is somewhat slow, but the former is active like glycine and alanine.

Example 2 An example in which cysteine and cystine were added to manganese powder of different fineness is shown below.

SH groups appear to inhibit the curing reaction.

Powderiness of Manganese Powder Amino Acid Name Hardening Process Example 3 We will describe two examples that show a unique reaction process even though they are common amino acids. First, 0.2 g of l-tryptophan was added to 10 g of manganese powder of 325 mesh or less, mixed well and ground. After adding 1.6 ml of water, the mixture was stirred and mixed well, but no significant reaction occurred and the mixture hardened. I didn't do it either. In a similar experiment using d,l-methionine, strong heat was generated after 100-120 seconds and water vapor was also generated, but no normal cured product was produced.

Example 4 Manganese powder (B
), the amount passed through a 325 mesh sieve (C)
, and the residue (A) obtained by separating C from B, an experiment similar to the example already shown was conducted using three types of manganese powder. The blending ratio was 1.6 ml of water to a ground mixture of 10 g of manganese powder and 0.2 g of d,l-α alanine.

The numbers in the table are the number of seconds from the time of water injection.

Although there is no clear difference in the point at which expansion begins, it is clear that the time between the start of steam jetting and the end of steam generation and curing is shorter and the reaction occurs more rapidly with a higher content of fine powder. It is. This is true even when other amino acid derivatives are used, and the results of an experiment in which 1.6 ml of water was added to a mixture of 10 g of manganese powder and 0.1 g of glutamic acid amide and ground are shown below.

The numbers in the table are the number of seconds from the time of water injection.

It turns out that the more fine powders are included, the more rapidly the exothermic and curing reaction progresses.

Example 5 Next, we will describe an experimental example showing that a compound containing a sulfonic acid group instead of a carboxyl group also has a curing effect similar to that of ordinary amino acids. Of course, in this case as well, the amino group must be contained within the same molecule. For example β
- When 0.2 g of aminoethyl sulfonic acid and 10 g of manganese powder are mixed and ground, 1.6 ml of water is poured into the mixture and stirred, the reaction proceeds rapidly and an expansion phenomenon is observed.

After that, 53 seconds after water injection, water vapor began to be ejected, and 67
In seconds, steam generation is completed and a hardened product is formed.

Example 6 An example in which manganese alloy powder (75% manganese, 25% iron) was used instead of the conventional manganese powder is shown below. The above alloy powder 10g12d, l-α alanine 0.2
Add 1.0 ml of water to the mixture, mix and grind well, and stir well. The slurry thus obtained was poured into a glass shear dish, covered with a lid, and left to stand. When observed after 8 hours, it was found that it had already hardened.

As described above, it has been found that when manganese powder or manganese alloy powder is mixed with a carboxylic acid containing an amino group or a sulfonic acid containing an amino group, a composition having hydraulic properties can be obtained.

Patent applicant: Yukio Murakami

Claims (1)

[Claims] Manganese powder or alloy powder containing manganese at a weight ratio of 0.2% or more to a carboxylic acid containing an amino group or a sulfonic acid containing an amino group in a weight ratio in the range of 100:0.01 to 100:20. A hydraulic metal composition composed of a mixture of