JPS61207498A - Treatment agent for printed board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a novel processing agent for printed circuit boards.

[Conventional technology]

The screen mesh on which the photosensitive resin film is attached to create the printing board has sebum dirt, oil, and flakes from the human body attached to it, so the photosensitive resin film is attached with the dirt still attached. This resulted in uneven printing and it was not possible to obtain clear printed matter.

Conventionally, in order to remove dirt, for example,
A neutral detergent as shown in Japanese Patent No. 506 is used.

[Problem that the invention seeks to solve]

However, even if dirt could be removed using a neutral detergent, the screen mesh had poor water wettability, making it impossible to cleanly attach the photosensitive resin film.

In addition, there are detergents that use organic acids to improve detergency and water wettability, but due to their strong acids, sufficient care must be taken when using them.

In view of the above-mentioned drawbacks, the present invention provides a processing agent for printed circuit boards that has excellent cleaning power against oil and fat adhering to screen meshes, has excellent water wettability, and is free from the risk of rough hands. The purpose is to

[Means for solving problems]

The present inventors blended a cationic polymer and an anionic surfactant into a printing substrate processing agent to form a complex and improve the detergency and water retention by increasing adsorption onto the screen mesh. was found to be significantly improved.

The present inventors have discovered that by further blending a nonionic surfactant, the detergency can be further enhanced without impairing water wettability.

That is, the present invention provides a printing substrate processing agent containing a cationic polymer and an anionic surfactant. Furthermore, the present invention provides a printing substrate processing agent containing a cationic polymer, an anionic surfactant, and a nonionic surfactant.

The processing agent of the present invention is obtained by dissolving a cationic polymer and an anionic surfactant, or a nonionic surfactant and a cationic polymer in water.

As the cationic polymer used in the present invention, all those having the functional groups shown below can be used.

N11l H 1+ N-H ■ Disease 2H ■ N11L3 11 ■ 11h4 R ■ Disease 5 Nl16 R Among them, the quaternary salt type (4) is particularly good.

As the cationic polymer used in the present invention, cationic starch and cationic cellulose represented by the following general formula (1) are suitable.

(In the formula, AI: starch residue or cellulose residue R: alkylene group or hydroxyalkylene group R,, R,, Rs: the same or different, an alkyl group, an aryl group, an aralkyl group, or a nitrogen atom in the formula) may be included to form a heterocycle.

X: anion (chlorine, bromine, iodine, sulfuric acid, sulfonic acid, methyl sulfuric acid, phosphoric acid, nitric acid, etc.) I: positive integer) Such cationic starch can be prepared by adding glycidyltrimethylammonium chloride or 3- to starch under alkaline conditions, for example. It can be obtained by reacting chloro-2-hydroxypropyltrimethylammonium chloride. Or
It can be obtained by quaternizing dimethylaminoethylated starch. Furthermore, it can also be obtained by reacting starch with 4-chlorobutene trimethylammonium chloride.

On the other hand, cationic cellulose can be obtained, for example, by subjecting hydroxyethyl cellulose to the above reaction.

In this case, the degree of cation substitution of the cationic starch or cationic cellulose is 0.01 to 1, that is, 0.01 to 11, preferably 0.02 to 0.5 cationic groups are introduced per anhydroglucose unit. good.

The content of the cationic polymer is 0.1 to 15% by weight,
Preferably it is 1 to 10% by weight.

In addition, as the cationic polymer, the following formula (2),
Cationic vinyl polymers represented by (3), (4) or (5) can also be used.

R# (wherein, R4: hydrogen atom or methyl group R5, R6, R?: same or different, hydrogen atom, alkyl group having 1 to 4 carbon atoms or substituted alkyl group, Y: oxygen atom or amide bond) NH group X: same as formula (1) l: integer from 1 to 10)
Hydrogen atom, alkyl group or substituted alkyl group having 1 to 2 carbon atoms, X: same as formula (1)) (wherein, X: same as formula (1)) Vinyl polymers can be used alone or in combination of two or more kinds in the present invention.

On the other hand, examples of anionic surfactants include the following.

l) Straight-chain or branched alkylbenzene sulfonate having an alkyl group with an average carbon number of 10 to 16 2) Having a straight-chain or branched alkyl group or alkenyl group with an average carbon number of 10 to 20, within one molecule An average of 0.5 to 8 moles of ethylene oxide, propylene oxide, or butylene oxide, or a ratio of ethylene oxide/propylene oxide = 0.1/9.9 to 9.910.1, or ethylene oxide/butylene oxide = 0
．． Alkyl or alkenyl ether sulfate added in a ratio of 1/9.910.1 3) Alkyl or alkenyl sulfate having an alkyl or alkenyl group having an average of 10 to 20 carbon atoms 4) Addition of an average of 10 to 20 carbon atoms to 1 Olefin sulfonate salts having an average of 10 to 20 carbon atoms per molecule 5) Alkanesulfonate salts having an average of 10 to 24 carbon atoms per molecule 7) Saturated or unsaturated fatty acid salts having an average of 10 to 24 carbon atoms per molecule Having an alkyl group or alkenyl group having an average carbon number of 10 to 20, and an average of 0.5 to 8 moles of ethylene oxide, propylene oxide, or butylene oxide in one molecule, or ethylene oxide/propylene oxide = 0.1/9.9 ~9.9 with a ratio of 10.1 or ethylene oxide/butylene oxide = 0
．． Alkyl or alkenyl ether carboxylic acid salt added in a ratio of 1/9.9 to 9.910.1 8) α-sulfo fatty acid salt or ester R-CIICO2Y represented by the following formula 5(hZ [wherein, Y is an alkyl group having 1 to 3 carbon atoms or a counter ion,
Z is a counterion. R represents an alkyl group or alkenyl having 10 to 20 carbon atoms. ]9) Average carbon number 10~
22 alkyl or alkenyl succinate Here, the counter ions of the anionic surfactant include alkali metal ions such as sodium and potassium, alkaline earth metal ions such as calcium and magnesium, ammonium ions, and carbon atoms having 2 or 3 carbon atoms. Alkanol group from 1 to
Examples include alkanolamines containing three alkanolamines.

10) Phosphate ester-based activator magnet 1 Alkyl (or alkenyl) acidic phosphate ester (R' 0) , -P-(OH), (R' is an alkyl group having 8 to 24 carbon atoms, or an alkenyl group , n'+ 1
1'=3, n'= 1-2) 2 Alkyl (or alkenyl) phosphate ester (R' 0) nn-P-(OH), (R' is as described above, n"+ m"= 3, n”=1~N13
Alkyl (or alkenyl) phosphate ester salt (R'0), p-(OM), (R', n'', or'' are as described above, h is Na, K,
Ca) Among these, those having a high complex forming ability are preferred, and the sodium salt of 1) is particularly preferred.

The blending amount is preferably 0.1 to 15% by weight, particularly 1 to 10% by weight.
Good weight percentage.

Further examples of nonionic surfactants include the following.

1) Polyoxyethylene alkyl or alkenyl ether having an alkyl group or alkenyl group having an average carbon number of 10 to 20 and to which 1 to 20 moles of ethylene oxide is added 2) Having an alkyl group having an average carbon number of 6 to 12, 1-20
Polyoxyethylene alkylphenyl ether with mol of ethylene oxide added 3) Average carbon number 10-2
Polyoxypropylene alkyl or alkenyl ether with 0 alkyl or alkenyl groups and 1 to 20 moles of propylene oxide added 4) Polyoxypropylene alkyl or alkenyl ethers with an average carbon number lθ to 20 and 1 to 20 moles Polyoxybutylene alkyl or alkenyl ether with butylene oxide added 5) It has an alkyl group or alkenyl group with an average carbon number of 10 to 20, and a total of 1 to 30 moles of ethylene oxide and propylene oxide or ethylene oxide and butylene oxide. Added nonionic activator (ratio of ethylene oxide to propylene oxide or butylene oxide is 0.1/9.9 to 9.910.1) 6)
Higher fatty acid alkanolamide or its alkylene oxide adduct represented by the following general formula Ro 1 R n or C) 1!, where n is an integer of 1 to 3, and -1 is an integer of 0 to 3.] 7) Silasaccharide fatty acid ester 8 consisting of a fatty acid with an average carbon number of 10 to 20 and 1 g of sea i. ) Fatty acid glycerin monoester consisting of fatty acid having an average carbon number of 10 to 20 and glycerin 9) Polyoxyethylene, polyoxypropylene block polymerization type surfactant represented by the following general formula HO(C!H,0) , -(C ,8,0) b-(cz
u4o) c.

[In the formula, a, b, c are integers of 2 to 20, L V is 2
An integer of ~20] Among these, those with high affinity with complexes are preferred, and 1) is particularly preferred.

The blending amount is 0.5 to 10% by weight, preferably 1 to 8% by weight.
It is.

In addition, optional ingredients such as thickeners, pigments, coloring agents, fragrances, bactericidal agents, preservatives, etc. can be added.

The remainder is water or a mixture of water and a water-soluble solvent.

Examples of water-soluble solvents include lower alcohols such as methanol, ethanol, propatool, isopropanol, butanol, calpitols such as butyl mono-, di- or triglycols, cellosolves such as methyl cellosolve, ethyl cellosolve, and acetone. It will be done.

〔Effect of the invention〕

By using the processing agent of the present invention, it is possible to sufficiently remove dirt from the screen mesh and improve its water wettability, making it possible to mount the photosensitive film cleanly and eliminate printing unevenness. You can get prints. It is also neutral, so it is safe to use.

〔Example〕

The present invention will be explained below with reference to Examples, but the present invention is not limited to these Examples.

In the table, numbers other than cleaning rate are weight %.

Examples 1 to 3 and Comparative Examples 1 to 2 The detergency and water wettability of the compositions shown in Table 1 were investigated. The results are also shown in Table-1.

(Cleaning power test method) Rapeseed oil was evenly applied to the surface of the polyester screen mesh, a sponge was soaked with 5 g of detergent, and the screen mesh was washed back and forth 5 times, followed by rinsing with water and drying.

Regarding the cleaning power, the cleaning rate was calculated from the weight difference using the following formula.

(Water wettability test method) After washing the polyester screen mesh, it was immersed in water and gently pulled out, and the water wettability was evaluated according to the following criteria.

O: Complete wetting ∆ Some water repellency ×: Completely repells water Table 1 0 ■ Examples 4 to 5 and Comparative Example 3 The detergency and water wettability of the compositions shown in Table 2 were investigated. Ta. The results are also shown in Table-2.

Table 2 Book) Same as Table 1 *Umbrella) Chi <= EO・8 Example 6 and Comparative Examples 4 to 5 The detergency and water wettability of the compositions shown in Table 3 were investigated using commercially available products. . The results are also shown in Table 3.

Table-3 *) Same as Table-2 This book)

Claims (1)

[Scope of Claims] 1. A processing agent for printed circuit boards, characterized by containing a cationic polymer and an anionic surfactant. 2 Content of cationic polymer is 0.1 to 15% by weight
, the content of anionic surfactant is 0.1 to 15% by weight
The processing agent for printed circuit boards according to claim 1. 3. The printing substrate processing agent according to claim 1 or 2, wherein the cationic polymer is selected from the group consisting of cationic starch, cationic cellulose, and cationic vinyl polymer. 4. A processing agent for printed circuit boards, characterized by containing a cationic polymer, an anionic surfactant, and a nonionic surfactant. 5 Cationic polymer content is 0.1 to 15% by weight
, the content of anionic surfactant is 0.1 to 15% by weight
, the content of nonionic surfactant is 0.5 to 10% by weight
The processing agent for printed circuit boards according to claim 4. 6. The printing substrate processing agent according to claim 4 or 5, wherein the cationic polymer is selected from the group consisting of cationic starch, cationic cellulose, and cationic vinyl polymer.