JP4716059B2 - Method for producing higher fatty acid zinc block molded body - Google Patents

Description

The present invention relates to a method for producing a higher fatty acid zinc block molded article used as a lubricant, an abrasive, a cleaning aid, a development aid and the like in office machines such as electrostatic copying machines and other precision equipment.

  Conventionally, higher fatty acid metal salts have been used in office machines such as electrostatic copying machines as lubricants, abrasives, cleaning aids, development aids, and the like. This higher fatty acid metal salt is finally used in powder form, but as a supply method, a method of blocking the higher fatty acid metal salt in advance, scraping it with a brush, etc., and supplying it to the necessary place has been put to practical use. ing.

  As a known technique related to the above application field, there is JP-A-57-97572 (Patent Document 1) “Cleaning method in electrophotographic copying machine”, and an auxiliary composition is disclosed in JP-A-57-73774. There is a gazette (Patent Document 2) “Cleaning aid for electrophotographic copying machine”. Moreover, as a manufacturing method of a higher fatty acid salt, the melt-solidification method described in Japanese Patent No. 2796486 (Patent Document 3), Japanese Patent No. 3192371 (Patent Document 4) “Press-fit molding apparatus and metal soap for metal soap block molding” "Block forming method", Japanese Patent No. 3192391 (Patent Document 5) "Press-fit forming line for metal soap block forming and metal soap block forming method".

  However, none of the properties of the fatty acid metal salt of the raw material is mentioned, and cracks, chips, protrusions, voids, etc. are recognized in the obtained higher fatty acid metal salt block molded body, and the performance as a molded body is sufficient. In some cases, it could not be obtained. In particular, when voids are generated, there are cases in which there are variations in shaving during use, and the quality is not stable. Therefore, there has been a demand for the development of a higher fatty acid metal salt block molded body having no cracks, chips, protrusions, voids and the like and having stable quality.

JP-A-57-97572 Japanese Unexamined Patent Publication No. 57-73774 Japanese Patent No. 2796486 Japanese Patent No. 3192371 Japanese Patent No. 3192391

The present invention has been made in view of the above circumstances, and is a higher fatty acid zinc block molded article that can be used favorably in office machines such as electrostatic copying machines, and has higher durability and higher smoothness. It aims at providing the manufacturing method of a body .

The present inventor considers that the reason why the above-described problems occur in the conventional higher fatty acid metal salt is that he / she has not paid attention to the purity of the higher fatty acid metal salt as a raw material. As a result,
(1) Higher fatty acid zinc, or (2) Higher fatty acid zinc: 100 parts by mass, a metal selected from Group I alkali metals and Group II alkaline earth metals of the periodic table, lower fatty acids, and higher fatty acids And at least one metal salt with an acid selected from inorganic carbonic acid: a composition comprising a metal in an amount of more than 0 parts by mass and not more than 0.10 parts by mass, the higher fatty acid of (1) In the composition of zinc or (2), the total amount of the Group I alkali metal and the Group II alkaline earth metal in the periodic table is 0.12% by mass or less (that is, 0% by mass exceeding 0% by mass). Obtained by using a melting and solidifying method in which a raw material is used as a raw material, which is heated and melted and cooled and solidified by pouring the heated and melted raw material into a mold to obtain a molded body. Higher fatty acid zinc block moldings are expensive Found that a one has solved the conventional problems described above having durability and high smoothness, the present invention has been accomplished.

Therefore, this invention provides the manufacturing method of the following higher fatty acid zinc block molded object.
[1] (A) the periodic table Group I alkali metals and periodic table group II carbon number you containing more than 0.01 wt% 0.12 wt% or less of an alkaline earth metal in a total amount of 8 to 20 A method for producing a higher fatty acid zinc block molded article, comprising heating and melting higher fatty acid zinc, injecting it in a molten state into a mold preheated to a melting point or higher of the higher fatty acid zinc, and cooling and solidifying it.
[2] (A) Higher fatty acid zinc having 8 to 20 carbon atoms in which the total amount of Group I alkali metal and Group II alkaline earth metal of the periodic table is 0.12% by mass or less: 100 parts by mass ,
(B) a metal selected from Group I alkali metals and Group II alkaline earth metals of the periodic table, lower fatty acids having 7 or less carbon atoms, higher fatty acids having 8 to 20 carbon atoms, and inorganic carbonic acid At least one salt with an acid selected from: a metal is mixed in an amount of more than 0 parts by mass and 0.10 parts by mass or less, and the component (A) and the component (B) have a periodic rule Table group I alkali metal and periodic Table group II alkaline earth metal you containing 0.12 wt% 0.01 wt% in total composition heated to melt, which above the melting point of the composition A method for producing a higher fatty acid zinc block molded product, characterized in that it is poured in a molten state into a preheated mold and cooled and solidified.
[3] (A) A higher fatty acid zinc having 8 to 20 carbon atoms containing sodium, potassium, magnesium, and calcium in a total amount of 0.01% by mass to 0.12% by mass is heated and melted, and the higher fatty acid is melted. A method for producing a higher fatty acid zinc block molded article, which comprises pouring in a molten state into a mold preheated to a melting point of zinc or higher and cooling and solidifying the mold.
[4] (A) High fatty acid zinc having 8 to 20 carbon atoms in which the total amount of sodium, potassium, magnesium and calcium is 0.12% by mass or less:
(B) At least one salt of a metal selected from sodium, potassium, magnesium and calcium, a lower fatty acid having 7 or less carbon atoms, a higher fatty acid having 8 to 20 carbon atoms, and an acid selected from inorganic carbonic acid: The amount of metal exceeding 0 parts by mass and 0.10 parts by mass or less
And a composition containing 0.01% by mass or more and 0.12% by mass or less of sodium, potassium, magnesium and calcium in the component (A) and the component (B) by heating and melting, A method for producing a higher fatty acid zinc block molded article, which comprises injecting this in a molten state into a mold preheated to a temperature higher than the melting point of the composition and cooling and solidifying it.

  The higher fatty acid zinc block molded article of the present invention is a higher fatty acid zinc block molded article having higher durability and higher smoothness than conventional higher fatty acid zinc block molded articles, and a lubricant for office machines such as electrostatic copying machines, It can be suitably used as an abrasive, a cleaning aid, a development aid and the like.

  In the higher fatty acid zinc block molded article of the first aspect of the present invention, the total amount of (A) group I alkali metal and group II alkaline earth metal of the periodic table exceeds 0% by mass and is 0.12%. It is obtained by cooling and solidifying a heated melt of higher fatty acid zinc having a mass% or less. Further, in the higher fatty acid zinc block molded article of the second aspect of the present invention, the total amount of (A) Periodic Table Group I alkali metal and Periodic Table Group II alkaline earth metal exceeds 0% by mass and is 0. Higher fatty acid zinc of not more than 12% by mass: 100 parts by mass, (B) metal selected from Group I alkali metals and Group II alkaline earth metals of the periodic table, lower fatty acids, higher fatty acids and inorganic At least one metal salt with an acid selected from carbonic acid: the metal is contained in an amount of more than 0 parts by mass and 0.10 parts by mass or less, and in the component (A) and the component (B), It is obtained by cooling and solidifying a heated melt of a composition in which the total amount of Group I alkali metal and Group II alkaline earth metal of the periodic table is more than 0% by mass and 0.12% by mass or less. It is a thing. In the case of any higher fatty acid zinc block molded body, the concentration of the group I alkali metal and group II alkaline earth metal of the periodic table is 0.12% by mass or less in total (ie, exceeding 0% by mass). 0.12% by mass or less). In addition, the bulk specific gravity of the higher fatty acid zinc block molded product of the present invention is usually 1.090 to 1.110.

  In the present invention, the higher fatty acid zinc block molded product is at least one selected from Group I alkali metals and Group II alkaline earth metals of the periodic table, preferably sodium, potassium, magnesium and calcium. The total amount of the one or more metals is 0.12% by mass or less, particularly 0.10% by mass or less, preferably 0.0025% by mass or more, more preferably 0.005% by mass or more, particularly preferably 0.01. Higher fatty acid zinc which is at least mass% is used as a raw material. In the case of the first embodiment, the one in which the total amount of Group I alkali metal and Group II alkaline earth metal of the periodic table exceeds 0% by mass is used. On the other hand, in the case of the second aspect, it may be one that does not contain a periodic table group I alkali metal and a periodic table group II alkaline earth metal (that is, 0 mass%).

  And (A) higher fatty acid zinc, or (A) higher fatty acid zinc and (B) component periodic table group I alkali metal and periodic table group II alkaline earth metal, Preferably, a composition containing a predetermined amount of at least one metal selected from sodium, potassium, magnesium and calcium and at least one metal salt selected from lower fatty acids, higher fatty acids and inorganic carbonic acid is heated and melted. Then, it can be obtained by a method such as pouring a raw material heated and melted into a mold, for example, by sequentially cooling from one end of the mold to the other end, thereby cooling and solidifying to obtain a molded body.

  The reason for setting the content of Group I (Group 1A) alkali metal and Periodic Table Group II (Group 2A) alkaline earth metal in the raw material to a predetermined amount is that the alkali metal and alkali in the raw material This is because if the earth metal is contained in excess of a specific amount, not only the wear resistance of the resulting higher fatty acid zinc block molded product is lowered, but cracks, cracks, protrusions and the like are liable to occur. That is, if the alkali metal and alkaline earth metal in the raw material exceeds a specific amount, stabilization during use of the product becomes a problem, so the total content of alkali metal and alkaline earth metal is 0. It is necessary to be 12% by mass or less, preferably 0.10% by mass or less.

  Further, in order to eliminate shaving variations during use and to obtain a high-quality fatty acid zinc block molded product of stable quality, it is necessary that the raw material contains an alkali metal or an alkaline earth metal. The content of alkali metal and alkaline earth metal is preferably 0.0025% by mass or more, more preferably 0.005% by mass or more, and particularly preferably 0.01% by mass or more. If the amount is too small, cracks, chips, protrusions and the like may occur in the molded body.

  The higher fatty acid zinc in the raw material is not particularly limited, but the higher fatty acid constituting the higher fatty acid zinc preferably has 8 to 20, more preferably 12 to 18, carbon myristate, zinc stearate, zinc palmitate. Etc. are preferably used. Moreover, as higher fatty acid zinc, what was granulated or granulated can be used.

  Further, in the second aspect, the higher fatty acid zinc as the component (A), (B) Group I (Group 1A) alkali metal of the periodic table and Group II (Group 2A) alkaline earth metal of the periodic table And at least one metal salt of an acid selected from lower fatty acids, higher fatty acids, and inorganic carbonic acid, and (A) component is 100 parts by weight with respect to (B) component and the metal is 0 A composition blended in an amount exceeding 0.001 part by mass and preferably 0.10 part by mass or less is used. In this case as well, the concentration of the Group I alkali metal and the Group II alkaline earth metal in the periodic table is 0.12% by mass or less, particularly 0.10% by mass in terms of the total amount of these metals. The content is preferably 0.0025% by mass or more, more preferably 0.005% by mass or more, and particularly preferably 0.01% by mass or more.

  The component (B) component metal salt is an alkali metal or alkaline earth metal, but the action is different from the alkali metal or alkaline earth metal contained in the higher fatty acid zinc (A) component (B ) By using the metal salt of the component in combination, the impact property of the resulting higher fatty acid zinc block molded product can be made better. Examples of the metal include alkali metal salts such as lithium, sodium and potassium, and alkaline earth metal salts such as calcium and barium.

  The metal salt of the lower fatty acid is not particularly limited, but a metal salt of a fatty acid having 7 or less carbon atoms, particularly 1 to 3 carbon atoms is preferable, and sodium acetate and sodium propionate are preferably used. The metal salt of the higher fatty acid is not particularly limited, but preferably has 8 to 30, more preferably 10 to 20, particularly 12 to 18 carbon atoms, and sodium stearate is preferably used. Furthermore, although it does not specifically limit as inorganic carbonate, Sodium carbonate and sodium hydrogencarbonate are used suitably.

  Examples of the method for preparing the higher fatty acid zinc as a raw material include the following methods. In addition, although zinc stearate is described here as an example, this is not restrictive. First, while stirring stearic acid (higher fatty acid) in a large amount of water, 1 to 2 equivalents of sodium hydroxide (hydroxide) is added to obtain sodium stearate. Thereafter, 1.5 to 3 equivalents of zinc chloride (chloride) is further added little by little to replace sodium stearate with zinc, thereby precipitating zinc stearate. Then, it is washed with water. The washing with water is preferably carried out at a temperature of about 10 to 30 ° C. at a ratio of raw material / water = 1/5 to 1/20 for 10 to 60 minutes. Similarly, when other higher fatty acids are used, they can be appropriately produced by changing the type of higher fatty acids.

  Next, the manufacturing method of a higher fatty acid zinc block molded object is shown. As the mold used in the present invention, a metal mold (hereinafter simply referred to as a mold) is preferably used because it becomes high temperature during use, thermal conductivity and strength are required. The material of the mold is preferably one having good processability and heat conductivity, easy to handle, inert to the higher fatty acid zinc and having less surface adhesion, and preferably made of Al.

  There are various shapes of the higher fatty acid zinc block molded body, and a mold having a cavity (cavity) suitable for each shape is used. For example, when a mold is used to manufacture a rectangular block molded body, a desired number of rectangular parallelepiped cavities (cavities) corresponding to the product are provided in the mold, and a mold and / or a table on which the mold is placed ( Provide a heating mechanism such as a heater and / or a cooling mechanism (preferably a water cooling mechanism) to a metal having good thermal conductivity so that a temperature gradient can be given to the mold during molding as necessary. Can do. The mold is preferably a split mold that is separated into two or more.

  The manufacturing procedure can be as follows, for example. First, the entire mold is preheated to a temperature higher than the melting temperature of the higher fatty acid zinc or the composition, and the higher fatty acid zinc or the composition melted at 120 to 200 ° C. is poured into the cavity of the mold for 30 minutes to 5 hours. After heating to a certain degree (120 to 200 ° C.), cooling is performed by a cooling mechanism (water cooling or the like) provided on the lower part of the mold body or on a table on which the mold is placed, and in parallel with this, It stops in order from the lower side, and forms a solidified product of higher fatty acid zinc gradually from the bottom. For example, first, the lower heater voltage is gradually lowered to gradually lower the temperature, and after a certain time from the start of lowering of the lower temperature of the mold body, heating by the central heater and then the upper heater are sequentially stopped. The method can be applied. In this case, after the temperature of the entire mold becomes 40 ° C. or less, the mold can be opened and the molded body can be taken out.

  EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example.

[Example 1]
While stirring 1.2 g of stearic acid in 30 L of water, 1.2 equivalents of sodium hydroxide are added to form sodium stearate, and then 1.5 equivalents of zinc chloride are added little by little, and zinc stearate is added. Got. Thereafter, washing with water was performed for 30 minutes at a water temperature of 20 ° C. and a ratio of zinc stearate / water = 1/10. When the concentration of the alkali metal and alkaline earth metal of the obtained zinc stearate (referred to as zinc stearate A) was measured, sodium was 0.05% by mass.

  The concentration of the alkali metal and alkaline earth metal in the higher fatty acid zinc is as follows: 1 g of higher fatty acid zinc as a sample, 10 ml of distilled water and 3 ml of concentrated hydrochloric acid are added and dissolved at 70-80 ° C., and then allowed to cool and filter. Then, the alkali metal and alkaline earth metal in the filtrate were measured by quantifying with an ICP emission spectrophotometer (IRIS Intrepid II XSP).

  Next, 10 dies each having 10 grooves each having a width of 8 mm, a depth of 8 mm, and a length of 400 mm are provided on one side of a thick aluminum plate, and 11 aluminum flat plates to which heaters are attached. In this way, they were alternately superposed, and these were fastened with bolts to be integrated and fixed, and placed on a mold placing table equipped with a water cooling mechanism so as to be in the length direction or vertical direction of the groove.

  This mold is preheated to 160 to 200 ° C in advance, and zinc stearate A heated and melted in a separate melting tank at 180 ° C for 3 hours is poured into it, and maintained at 180 ° C for 30 minutes. Then, cold water was circulated through the water cooling mechanism of the mold mounting table. After cooling for 4 hours until the entire mold temperature reached 40 ° C. or lower, the mold was opened to obtain a block molded body of zinc stearate.

  When 100 pieces of the obtained zinc stearate block molded product were confirmed, cracks were generated by 1% and chips were generated by 1%, but no protrusions were generated. Further, the abrasion resistance was evaluated by the following method, but the abrasion resistance was also good and could withstand practical use sufficiently. Table 1 shows the results.

<Abrasion resistance>
Measurement was performed using Haydong 14DR manufactured by Shinto Kagaku. A block with a height of 8 mm, a width of 8 mm, and a length of 10 mm is cut out from the molded body, and a load of 100 mN (5 strokes between 100 mm, speed: 17 mm) using an aluminum oxide file (product number AL202 (50 μm) manufactured by 3M). 8 mm × 8 mm cross section was worn at a speed of 1 second / second). The loss on wear at that time was expressed in terms of 100 minutes. The optimal range for this zinc stearate block molding is 0.1 to 0.3%.

[Example 2]
Zinc stearate was obtained in the same manner as in Example 1 except that the washing was performed at a water temperature of 20 ° C. and a ratio of zinc stearate / water = 1/15 for 30 minutes. When the alkali metal and alkaline earth metal concentrations of the obtained zinc stearate (referred to as zinc stearate B) were measured, sodium was 0.01% by mass. Moreover, the zinc stearate block molded object was obtained by the method similar to Example 1 using the zinc stearate B, and this was evaluated. Table 1 shows the results.

[Example 3]
Zinc stearate was obtained in the same manner as in Example 1 except that the washing was performed at a water temperature of 20 ° C. and a ratio of zinc stearate / water = 1/10 for 15 minutes. When the concentration of alkali metal and alkaline earth metal of the obtained zinc stearate (referred to as zinc stearate C) was measured, sodium was 0.10% by mass and magnesium was 0.02% by mass. Moreover, the zinc stearate block molded object was obtained by the method similar to Example 1 using the zinc stearate B, and this was evaluated. Table 1 shows the results.

[Example 4]
0.06 parts by mass of sodium propionate (0.014 parts by mass as sodium) was mixed with 100 parts by mass of zinc stearate B of Example 2, to obtain a composition (Na total 0.024% by mass). Using this composition, a zinc stearate block molded body was obtained in the same manner as in Example 1, and this was evaluated. Table 1 shows the results.

[Example 5]
0.02 parts by mass of sodium stearate (0.002 parts by mass as sodium) was mixed with 100 parts by mass of zinc stearate B of Example 2, to obtain a composition (Na total 0.012% by mass). Using this composition, a zinc stearate block molded body was obtained in the same manner as in Example 1, and this was evaluated. Table 1 shows the results.

[Example 6]
0.06 parts by mass of sodium hydrogen carbonate (0.016 parts by mass as sodium) was mixed with 100 parts by mass of zinc stearate B of Example 2, to obtain a composition (Na total 0.026% by mass). Using this composition, a zinc stearate block molded body was obtained in the same manner as in Example 1, and this was evaluated. Table 1 shows the results.

[Example 7]
Zinc palmitate was obtained in the same manner as in Example 1 except that stearic acid was changed to palmitic acid. Thereafter, water washing was performed under the same conditions as in Example 1. When the alkali metal and alkaline earth metal concentrations of the obtained zinc palmitate were measured, sodium was 0.07% by mass. Moreover, the zinc palmitate block molded object was obtained by the method similar to Example 1 using zinc palmitate, and this was evaluated. Table 1 shows the results.

[Comparative Example 1]
Zinc stearate was obtained in the same manner as in Example 1 except that the washing was performed at a water temperature of 20 ° C. and a ratio of zinc stearate / water = 1/4 for 10 minutes. The concentration of alkali metal and alkaline earth metal of the obtained zinc stearate (referred to as zinc stearate D) was measured and found to be 0.13% by mass. Moreover, the zinc stearate block molded object was obtained by the method similar to Example 1 using the zinc stearate D, and this was evaluated. Table 1 shows the results.

<Crack, chipping, protrusion acceptance criteria>
Cracks and protrusions: Not occurring Chipping: Less than 5 mm in length and less than 2 mm in height for a product with a length of 400 mm <Yield>
The percentage of the molded product excluding cracks, chips and protrusions is displayed as a percentage.

Claims (4)

(A) the periodic table Group I alkali metals and periodic table group II higher fatty zinc carbon number 8 to 20 you containing 0.12 wt% 0.01 wt% in total of alkaline earth metal A method for producing a higher fatty acid zinc block molded article, which comprises heating and melting and injecting this in a molten state into a mold preheated to a melting point or higher of the higher fatty acid zinc and cooling and solidifying it. (A) High fatty acid zinc having 8 to 20 carbon atoms in which the total amount of group I alkali metal and group II alkaline earth metal of the periodic table is 0.12% by mass or less:
(B) a metal selected from Group I alkali metals and Group II alkaline earth metals of the periodic table, lower fatty acids having 7 or less carbon atoms, higher fatty acids having 8 to 20 carbon atoms, and inorganic carbonic acid At least one salt with an acid selected from: a metal is mixed in an amount of more than 0 parts by mass and 0.10 parts by mass or less, and the component (A) and the component (B) have a periodic rule Table group I alkali metal and periodic Table group II alkaline earth metal you containing 0.12 wt% 0.01 wt% in total composition heated to melt, which above the melting point of the composition A method for producing a higher fatty acid zinc block molded product, characterized in that it is poured in a molten state into a preheated mold and cooled and solidified. (A) A higher fatty acid zinc having 8 to 20 carbon atoms and containing sodium, potassium, magnesium and calcium in a total amount of 0.01% by mass to 0.12% by mass is heated and melted, and this is melted by the melting point of the higher fatty acid zinc. A method for producing a higher fatty acid zinc block molded article, which comprises injecting a molten state into the preheated mold as described above, and cooling and solidifying it. (A) High fatty acid zinc having 8 to 20 carbon atoms in which the total amount of sodium, potassium, magnesium and calcium is 0.12% by mass or less:
(B) At least one salt of a metal selected from sodium, potassium, magnesium and calcium, a lower fatty acid having 7 or less carbon atoms, a higher fatty acid having 8 to 20 carbon atoms, and an acid selected from inorganic carbonic acid: The amount of metal exceeding 0 parts by mass and 0.10 parts by mass or less
And a composition containing 0.01% by mass or more and 0.12% by mass or less of sodium, potassium, magnesium and calcium in the component (A) and the component (B) by heating and melting, A method for producing a higher fatty acid zinc block molded article, which comprises injecting this in a molten state into a mold preheated to a temperature higher than the melting point of the composition and cooling and solidifying it.