JP3166979B2 - Cuprous chloride composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cuprous chloride composition which is stable against oxidation and moisture absorption.

[0002]

2. Description of the Related Art Cuprous chloride is used as a raw material for synthesizing phthalocyanine pigments, but its fine powder generates dust when used, is cumbersome to handle, and may cause problems in occupational health. Further, if left in the air, discoloration and solidification gradually occur due to oxidation and moisture absorption, and the quality is reduced. The coagulated cuprous chloride must be crushed when taken out of the container, and it takes a long time until it is uniformly dispersed in the reaction system. Therefore, it has been proposed to make cuprous chloride into a granular material and coat the surface with a coating made of cupric oxide (Japanese Patent Publication No. Sho 62-41170).

[0003]

The coating made of cupric oxide used in the above-mentioned conventional method is dense and strong, hardly transmits gas such as water vapor, and has high mechanical strength. Protects the granular material of cuprous chloride by shielding it from the outside air,
It is possible to prevent a decrease in quality. However, on the other hand, when reacting cuprous chloride granules with other compounds, a strong coating of cupric oxide hinders the reaction and cannot be applied to powdered cuprous chloride. there were. The present invention is to solve such a problem of the conventional method.

[0004]

An object of the present invention is to uniformly mix 100 parts by weight of cuprous chloride and 0.05 to 5 parts by weight of a stabilizer comprising phthalic anhydride, phthalic acid or urea. Achieved by the cuprous chloride composition.

The cuprous chloride used in the present invention is produced by a known method, for example, by reacting metallic copper with chlorine at a high temperature in a nitrogen stream. The particle size of cuprous chloride is not particularly limited, but an average particle size of about 12 to 300 mesh is appropriate.

The mixing ratio of the cuprous chloride and the stabilizer is not critical, but the stabilizer is used in an amount of 0.05 to 5, preferably 0.2 to 1 weight per 100 parts by weight of the cuprous chloride. It is preferred to add parts. If the amount of the stabilizer is less than 0.05 part, the stabilizing effect is not exhibited. Even if 5 parts or more are added, the effect is not changed, which is uneconomical. The composition of the present invention is produced by adding a predetermined amount of a stabilizing agent to cuprous chloride and stirring and mixing until a homogeneous system is obtained. The stirring and mixing are performed at room temperature or under heating. Preferably, 50 to 130
C., particularly preferably at 60 to 100.degree. C. for 5 to 60 minutes. In the composition of the present invention thus obtained, it is considered that cuprous chloride and phthalic anhydride, phthalic acid or urea are bonded to form a complex or a double salt on the surface of the cuprous chloride particles. . This complex or double salt does not hinder the reaction of cuprous chloride with phthalic anhydride (or phthalic acid) and urea to form a phthalocyanine pigment.

[0007]

The present invention will be described more specifically with reference to test examples and examples.

Test Example 1 The coagulability of the cuprous chloride composition of the present invention was tested. The coagulation property is as follows. A sample is loosely sieved with a JIS standard sieve 12 mesh, divided into a coagulated portion remaining on the sieve and powder that has passed through the sieve, and the respective weights are measured. Expressed as a ratio. For cuprous chloride with an average particle size of 40 mesh,
A predetermined amount of a stabilizer is added, and the obtained mixture is added to 25,6.
Samples are prepared by uniformly stirring and mixing at 0 or 100 ° C. for 5 minutes.
% In a room at a temperature of 25 ° C. The coagulation ratio (%) of each sample after 3 days and 7 days was calculated. Table 1 shows the results.

[0009]

[Table 1]

Further, FIG. 1 shows the solidification ratio when 0.5 part by weight of each stabilizer is added to 100 parts by weight of cuprous chloride and uniformly stirred and mixed at 60 ° C. for 5 minutes. Cuprous chloride without the addition of a stabilizer causes coagulation from the day the test is started, whereas the one with the addition of the stabilizer does not produce any coagulation until 3 days after the start of the test. After 3 days, a coagulum is gradually formed, but the degree of coagulation of the sample to which urea or phthalic anhydride is added is small, and the effect when urea is added is particularly remarkable.

Test Example 2 Samples were prepared in the same manner as in Test Example 1. Each sample was placed in a polyethylene bag and left in a room at a humidity of 80% and a temperature of 25 ° C. Each sample was tested for change in hue on the first day and after 7 days. The hue was measured using a colorimetric color difference meter Z-1001DP manufactured by Nippon Denshoku Industries Co., Ltd. Three values of L, a, and b are obtained from this measuring device.

The L value represents lightness (Lightness) and is displayed in the range of 0 to 100. The larger the numerical value, the brighter (the whiteness is stronger). The a value and the b value both represent color attributes (red, blue, yellow, etc.), and the a value is in the range of −60 to +80. The larger the value of (+), the stronger the degree of red. Also, the larger the value of (-), the stronger the degree of green.
The b value is in the range of -80 to +60, and the larger the numerical value of (+), the stronger the degree of yellow. Also, the larger the value of (-), the stronger the degree of blue. From these three values, the Lc value is calculated by the following equation. Lc = L-3a-3b Using the Lc value, the degree of coloring of the object can be represented. The larger the numerical value, the lower the coloring degree, and the smaller the numerical value, the stronger the coloring degree. Table 2 shows the Lc value of each sample.

[0013]

[Table 2]

Further, FIG. 2 shows a change in Lc value when 0.5 part by weight of each stabilizer is added to 100 parts by weight of cuprous chloride and the mixture is uniformly stirred at 60 ° C. for 5 minutes. The sample to which the stabilizer was added had a lower degree of discoloration than the sample without the addition, and phthalic acid or phthalic anhydride was particularly effective in preventing discoloration.

Example 1 Fresh cuprous chloride produced by reacting a piece of copper with chlorine was sieved to an average particle size of 40 mesh, and anhydrous anhydrous equivalent to 0.5 part by weight per 100 parts by weight of cuprous chloride. Add phthalic acid 6
The mixture was uniformly stirred and mixed at 0 ° C. for 5 minutes. The cuprous chloride composition thus produced was baked in a polyethylene bag for 3 days at a humidity of 8
When stored in a 0% room temperature room at 25 ° C., no coagulated product was formed, and about 27% of coagulated product was formed after 7 days. The change in hue was 10% after 7 days. The sample without addition performed at the same time was 40% after 3 days and 80% after 7 days.
And the hue changed about 36% after 7 days.

Example 2 Phthalic acid equivalent to 1.0 part by weight was added to 100 parts by weight of cuprous chloride produced in the same manner as in Example 1,
Mix uniformly at 00 ° C. for 10 minutes. After cooling to room temperature in a desiccator, it was filled in a polyethylene bag, stored under the same conditions as in Example 1, and tested for coagulation and change in hue. No change was observed even after storage for 3 days, and the rate of coagulation after 7 days was 64%. The change in hue is 1
It was 0%.

Example 3 Cuprous chloride produced in the same manner as in Example 1 was prepared using an average particle size of 1
The mixture was sieved to 2 mesh, and phthalic anhydride equivalent to 0.1 part by weight was added to 100 parts by weight of the cuprous chloride.
Stir and mix at 0 ° C. for 5 minutes. The cuprous chloride thus produced was cooled, filled in a polyethylene bag, stored under the same conditions as in Example 1, and tested for solidification and change in hue. 7
No coagulation was observed even after day. The change in hue was 10% after 7 days.

[0018]

According to the present invention, 0.1 to 5 parts by weight of a stabilizer composed of phthalic anhydride, phthalic acid or urea is added to 100 parts by weight of cuprous chloride, and the mixture is uniformly stirred and mixed. Discoloration and coagulation can be prevented.

[Brief description of the drawings]

FIG. 1 is a graph showing a change in a solidification ratio of a cuprous chloride composition.

FIG. 2 is a graph showing a change in Lc value of a cuprous chloride composition.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) C01G 3/05

Claims (1)

(57) [Claims] 1. A cuprous chloride composition comprising a homogeneous mixture of 100 parts by weight of cuprous chloride and 0.05 to 5 parts by weight of phthalic anhydride, phthalic acid or urea.