JP2011105904A - Dryer for printing ink - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dryer for printing ink reducing influence on a human body since aromatic components such as toluene and xylene are not contained, having low viscosity and easy handling properties and maintaining the same drying properties of a printing ink coated film as a printing ink using a conventional dryer. <P>SOLUTION: The dryer for the printing ink contains a fatty acid such as octylic acid, neodecanoic acid and naphthenic acid and a fatty acid metal salt (A) of a metal such as manganese, cobalt, calcium, nickel and magnesium and a fatty acid ester (B) represented by general formula (1): R<SP>1</SP>COOR<SP>2</SP>. In formula, R<SP>1</SP>denotes a 5-11C alkyl group and R<SP>2</SP>denotes a 1-3C alkyl group. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a dryer which is a drying accelerator for an oxidation polymerization drying type printing ink typified by a lithographic printing ink. More particularly, the present invention relates to a dryer having high drying performance and low viscosity and easy handling.

  In the oxidation polymerization drying type printing ink represented by the lithographic printing ink, a dryer is added as a drying accelerator for drying the ink. As the dryer used in the ink, metal salts of heavy metals such as cobalt, manganese, iron and zinc and various carboxylic acids are generally used. Since these metal salts have a high viscosity and are difficult to handle as they are, they are usually diluted with a volatile organic diluent such as a petroleum solvent.

  However, volatile organic solvents such as petroleum-based solvents have the advantage that the dryer has high solubility and low viscosity, but aromatic components such as toluene and xylene that are generally contained in the solvent diffuse into the air. There was a problem of adversely affecting the human body. There are petroleum-based solvents that do not contain aromatic components, but there is a problem of poor solubility.

  Therefore, a dryer using a vegetable oil solvent that does not contain an aromatic component such as toluene or xylene and has little influence on the human body instead of an organic solvent such as a petroleum solvent has been proposed (for example, Patent Document 1). reference.). This vegetable oil-based solvent generally has a high viscosity and is difficult to handle. In addition, vegetable oil-based solvents have poor solubility in the dryer and have a problem in storage stability.

  Accordingly, there is a need for a dryer that does not contain aromatic components such as toluene and xylene, has a reduced influence on the human body, has a low viscosity, and is easy to handle.

JP 2002-121428 A

  The problem to be solved by the present invention is that it does not contain an aromatic component such as toluene and xylene, so that the influence on the human body can be reduced, the viscosity is low and the handling is easy, and it is equivalent to a printing ink using a conventional dryer. It is providing the dryer for printing inks which can maintain the drying property of the printing ink film of this.

  As a result of intensive research, the inventors of the present invention do not contain aromatic components such as toluene and xylene by using a specific fatty acid ester as a diluent for the dryer, and the influence on the human body is reduced. The present invention has been completed by finding that a drier for printing ink can be obtained which is low in size and easy to handle and can maintain a drying property of a printing ink film equivalent to ink using a conventional drier.

  That is, this invention provides the dryer for printing ink characterized by including the fatty acid metal salt (A) and the fatty acid ester (B) represented by following General formula (1).

（式中、Ｒ^１は炭素原子数５〜１１のアルキル基であり、Ｒ^２は炭素原子数１〜３のアルキル基である。）

(In the formula, R ¹ is an alkyl group having 5 to 11 carbon atoms, and R ² is an alkyl group having 1 to 3 carbon atoms.)

  The dryer for printing ink of the present invention does not use petroleum solvents and does not contain aromatic components such as toluene and xylene, so it can reduce the effect on the human body, has low viscosity and is easy to handle, and is a conventional dryer It is possible to maintain the drying property of the printing ink film equivalent to the ink using the ink. Therefore, it is useful as a dryer (drying accelerator) for lithographic printing ink.

  The drier for printing of the present invention is produced by diluting a drier such as a synthesized metal soap with a fatty acid ester. In the present invention, the term “dryer” refers to a drying accelerator itself such as metal soap according to the common use of lithographic ink production, as well as diluting metal soap used in the production of printing ink with a diluent. It may mean that of the form.

  The fatty acid metal salt (A) used in the drier for printing ink of the present invention is a drier usually used for oxidative polymerization drying type printing ink represented by lithographic ink. Specifically, carboxylic acids such as octylic acid, neodecanoic acid and naphthenic acid, and metals such as manganese, cobalt, calcium, nickel, magnesium, iron, zinc, zirconium, copper, strontium, barium, potassium, cerium and rare earth (Hereinafter sometimes referred to as “metal soap”); borate salts of metals such as manganese, cobalt, calcium, nickel, magnesium, iron, zinc, zirconium, copper, strontium, barium, potassium, cerium, rare earth A borate of a metal soap.

  Examples of the borate of the metal soap include compounds represented by the following general formula (2).

（式中、Ｍはマンガン、コバルト、カルシウム、ニッケル、マグネシウム、鉄、亜鉛、ジルコニウム、銅、ストロンチウム、バリウム、カリウム、セリウム、レアアース等の金属原子を表し、Ｒ^３〜Ｒ^５はそれぞれ独立にオクチル酸、ネオデカン酸、ナフテン酸等のカルボン酸基を表す。なお、前記カルボン酸基は、カルボン酸が有するカルボキシル基の水素原子を除いた残基を意味する。）

(In the formula, M represents a metal atom such as manganese, cobalt, calcium, nickel, magnesium, iron, zinc, zirconium, copper, strontium, barium, potassium, cerium, rare earth, and R ^{3 to} R ⁵ are each independently octyl. Represents a carboxylic acid group such as acid, neodecanoic acid, naphthenic acid, etc. The carboxylic acid group means a residue obtained by removing a hydrogen atom of a carboxyl group of the carboxylic acid.

  Further, the method for producing the borate of the metal soap is not particularly limited. However, from the viewpoint of efficiently obtaining the target fatty acid metal salt, for example, the method described in Japanese Patent Publication No. 63-63551 is used. It is preferable to manufacture.

  Among the above fatty acid metal salts (A), manganese octylate, cobalt octylate, and cobalt neodecanoate are preferable because they have high drying performance.

  The fatty acid metal salt (A) can be used alone or in combination of two or more. When two types are used in combination, a combination of a fatty acid cobalt salt and a fatty acid manganese salt is preferable because the drying performance of the ink can be improved. This is because the fatty acid cobalt salt promotes drying of the ink surface and the fatty acid manganese salt promotes drying of the inside of the ink, so that the surface and the inside of the ink applied to the paper surface can be uniformly dried. Further, among the combinations of the fatty acid cobalt salt and the fatty acid manganese salt, a combination of manganese octylate and cobalt neodecanoate borate is preferable because it can further improve the drying performance of the ink.

  The fatty acid ester (B) used in the printing ink dryer of the present invention is represented by the following general formula (1).

（式中、Ｒ^１は炭素原子数５〜１１のアルキル基であり、Ｒ^２は炭素原子数１〜３のアルキル基である。）

(In the formula, R ¹ is an alkyl group having 5 to 11 carbon atoms, and R ² is an alkyl group having 1 to 3 carbon atoms.)

  The fatty acid ester (B) is obtained by esterifying a carboxylic acid having 6 to 12 carbon atoms and an alcohol having 1 to 3 carbon atoms, and the carbon chain of the carboxylic acid and alcohol is It may be linear or branched.

  Examples of the fatty acid ester (B) include caproic acid methyl ester, enanthic acid methyl ester, caprylic acid methyl ester, pelargonic acid methyl ester, capric acid methyl ester, lauric acid methyl ester, caproic acid ethyl ester, and enanthic acid ethyl ester. , Caprylic acid ethyl ester, pelargonic acid ethyl ester, capric acid ethyl ester, lauric acid ethyl ester, caproic acid propyl ester, enanthic acid propyl ester, caprylic acid propyl ester, pelargonic acid propyl ester, capric acid propyl ester, lauric acid propyl ester Etc. These fatty acid esters can be used alone or in combination of two or more. Among these fatty acid esters, caproic acid methyl ester, capric acid methyl ester, and lauric acid methyl ester are preferred because of their low odor. In particular, lauric acid methyl ester is preferable because it can achieve both a reduction in viscosity and a reduction in odor in a printing ink dryer.

  Moreover, it is preferable that the compounding ratio of the said fatty acid metal salt (A) and the said fatty acid ester (B) is the range of (A) :( B) = 70: 30-10: 90 on a mass basis, 60: More preferably, it is in the range of 40-30: 70. Within this range, a low-viscosity printing ink dryer can be obtained.

  The following two methods are mentioned as a typical manufacturing method of the printing dryer of the present invention.

(1) Direct method After reacting a fatty acid with a metal, a metal oxide or a metal hydroxide, dehydrating and filtering, the dilution is adjusted with a fatty acid ester as a diluent to obtain a printing dryer. This method is applied when the metal of the fatty acid metal salt is zinc, cobalt or the like.

(2) Metathesis method A salt that is soluble in water, usually a sodium salt, and a salt that is soluble in water of the target metal is added to this and subjected to an ion exchange reaction called metathesis, followed by washing, dehydration, and filtration. After that, it is diluted with a fatty acid ester as a diluent to obtain a printing dryer. This method is applied when the metal of the fatty acid metal salt is manganese, zirconium, iron, copper or the like.

  In the printing drier of the present invention, if necessary, an amine compound such as amino alcohol can be blended within a range that does not impair the object of the present invention.

  Hereinafter, the present invention will be described in more detail with specific examples.

Example 1
41 parts by mass of manganese octylate and 9 parts by mass of cobalt neodecanoate were dissolved in 50 parts by mass of methyl laurate to obtain a printing ink dryer (1).

(Example 2)
41 parts by mass of manganese octylate and 9 parts by mass of cobalt neodecanoate were dissolved in 50 parts by mass of capric acid methyl ester to obtain a dryer for printing ink (2).

(Example 3)
41 parts by mass of manganese octylate and 9 parts by mass of cobalt neodecanoate were dissolved in 50 parts by mass of methyl caprylate to obtain a printing ink dryer (3).

Example 4
31 parts by mass of manganese octylate was dissolved in 69 parts by mass of methyl laurate to obtain a printing ink dryer (4).

(Example 5)
59 parts by mass of cobalt octylate was dissolved in 41 parts by mass of methyl laurate to obtain a printing ink dryer (5).

(Comparative Example 1)
41 parts by mass of manganese octylate and 9 parts by mass of cobalt neodecanoate were dissolved in 50 parts by mass of methyl oleate to obtain a printing ink dryer (6).

(Comparative Example 2)
31 parts by mass of manganese octylate was dissolved in 69 parts by mass of oleic acid methyl ester to obtain a printing ink dryer (7).

(Comparative Example 3)
31 parts by mass of manganese octylate was dissolved in 69 parts by mass of soybean oil to obtain a printing ink dryer (8).

(Comparative Example 4)
59 parts by mass of cobalt octylate was dissolved in 41 parts by mass of oleic acid methyl ester to obtain a printing ink dryer (9).

(Comparative Example 5)
59 parts by mass of cobalt octylate was dissolved in 41 parts by mass of soybean oil to obtain a printing ink dryer (10).

(Preparation of varnish)
40 parts by mass of rosin-modified phenolic resin (manufactured by DIC Corporation “Beccasite F8301”), 50 parts by mass of soybean oil (manufactured by Nisshin Oillio Group), soybean oil fatty acid methyl ester (“TOEOL 3120” by Toei Chemical Co., Ltd.) ) Varnish (V) was prepared by heating 10 parts by mass and 0.3 parts by mass of aluminum chelate (“aluminum chelate” manufactured by Hope Pharmaceutical Co., Ltd.) at 210 ° C. for 1 hour.

(Preparation of ink for evaluation)
Using the printing ink dryers (1) to (10) obtained in Examples 1 to 5 and Comparative Examples 1 to 5, the inks for evaluation were blended in the following blending amounts and then kneaded in a three-roll mill. Was prepared. As the phthalocyanine blue pigment, “Fast Gen Blue TGR-L” manufactured by DIC Corporation was used.
Varnish (V) 65.5 parts by weight Phthalocyanine blue pigment 16 parts by weight Soybean oil 17 parts by weight Printing ink dryer 2 parts by weight

(Drying test)
The ink prepared above was applied onto a glass plate using a 1.5 mil applicator, and then tested using a drying time recorder (“Model No. 404” manufactured by Dazai Equipment Co., Ltd.). The measurement was performed in a constant temperature and humidity chamber (25 ° C., 50% RH). The drying time of the ink was defined as the time until the ink was completely dried and disappeared after the ink was applied on the glass plate and the drying of the ink started with the needle of the drying time recorder.

(Viscosity measurement)
The viscosity of the printing ink dryers (A) to (J) obtained in Examples 1 to 5 and Comparative Examples 1 to 5 was measured at a temperature of 25 ° C. using a bubble viscometer (manufactured by Gardner). .

  Table 1 shows the compositions of the printing ink dryers (1) to (10) obtained in Examples 1 to 5 and Comparative Examples 1 to 5, and the results obtained in the above tests and measurements.

  From the evaluation results shown in Table 1, it was found that the printing ink dryers of the present invention obtained in Examples 1 to 5 had a practical level of drying property, low viscosity and easy handling.

  On the other hand, it was found that the printing ink dryers obtained in Comparative Examples 1 to 5 had good drying properties but had high viscosity and were difficult to handle.

Claims (4)

A printing ink dryer comprising a fatty acid metal salt (A) and a fatty acid ester (B) represented by the following general formula (1).

(In the formula, R ¹ is an alkyl group having 5 to 11 carbon atoms, and R ² is an alkyl group having 1 to 3 carbon atoms.)   The printing ink dryer according to claim 1, wherein the fatty acid ester (B) is at least one selected from the group consisting of caprylic acid methyl ester, capric acid methyl ester, and lauric acid methyl ester.   The fatty acid metal salt (A) is at least one fatty acid selected from the group consisting of octylic acid, neodecanoic acid and naphthenic acid, and manganese, cobalt, calcium, nickel, magnesium, iron, zinc, zirconium, copper, strontium The printing ink dryer according to claim 1 or 2, which is a fatty acid metal salt with at least one metal selected from the group consisting of, barium, potassium, cerium, and rare earth.   3. The printing ink dryer according to claim 1, wherein the fatty acid metal salt (A) is at least one selected from the group consisting of manganese octylate, cobalt octylate, and cobalt neodecanoate.