JP2005352150A - Aqueous surface protective agent for print/photograph outputted by printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface protective agent for a print outputted by a color printer which prevents surface fading, abrasion, blur, etc., of a print, a photograph or the like outputted by a printer. <P>SOLUTION: This surface protective agent contains in water 1.0-7.0 pts. wt. of at least one resin selected from an acrylic resin, alkyd resin and butyral resin, 0.01-1.0 pt. wt. of an antioxidant, 0.05-1.0 pt. wt. of a preservative, 0.2-5.0 pts. wt. of a water repellent and 0.1-5 pts. wt. of an ultraviolet absorber. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a surface protective agent for protecting the image surface of a color print such as a color photograph or color image output by a printer or the like.

  In recent years, with the widespread use of color printers, it has been widely performed to obtain a color photo print by outputting a photograph taken with a digital camera with a color printer. In addition to such color photographic prints, color printers are widely used, for example, color printing of electronic image data, posters, and the like using a color printer.

  In general, a color printer forms a color image on a paper surface by fixing several colors of toner, ink, and the like on the surface of the recording paper. For this reason, the pigment is exposed on the surface of the recording paper, and when liquid such as water adheres, the image is blurred or scratches, discoloration, etc. are caused by scratching.

  In order to solve such a problem, in recent years, an ultraviolet shielding film is laminated on the surface. However, film laminating requires a special laminating apparatus, which is expensive in processing and complicated in operation. Also, not a laminate film, but an aerosol spray coating agent containing a binder, a solvent, a propellant and the like is known. However, these aerosol coating agents are for paintings, and when used for paper for color printers, the paper surface appears to wave when dried, the surface coat is dissolved, There are problems such as discoloration and powder remaining on the coated surface, which is not suitable for protecting the surface of printed matter / photographs.

Japanese Laid-Open Patent Publication No. 9-258423 discloses a color printer in which an ultraviolet shielding coating agent coating process is provided following an image forming process, but the ultraviolet shielding coating agent coating process is complicated, and the color printer It is not practical because the main body is enlarged.
In recent years, environmental friendliness and high safety to the human body are also required.

Japanese Patent Laid-Open No. 9-258423

  The present invention prevents discoloration, scratching, blurring, etc. of the surface of printed matter and photographs formed by a color printer, etc., and protects the aqueous surface for printer prints / photographs with low impact on the natural environment and low toxicity to the human body. The purpose is to provide an agent.

  As a result of intensive studies to solve the above problems, the present inventor has solved the problem by making an aqueous composition containing a binder, an antioxidant, a water repellent, an ultraviolet absorber, a preservative, and the like at a specific ratio. The inventors have found that the problem can be solved and have completed the present invention.

That is, the present invention includes the following inventions.
(1) 1.0 to 7.0 parts by weight of at least one resin selected from acrylic resin, alkyd resin and butyral resin, 0.01 to 1.0 part by weight of antioxidant, and preservative Printer printed matter / photographic surface protection containing 0.05 to 1.0 part by weight, water repellent agent 0.2 to 5.0 part by weight, and UV absorber 0.1 to 5 part by weight in water Agent.
(2) The surface protective agent according to (1), further containing 0.1 to 5.0 parts by weight of a lower alcohol.
(3) The surface protective agent according to (1) or (2), wherein the water repellent is a silicone compound, a fluorine compound or a resin compound.
(4) The surface protective agent according to any one of (1) to (3), wherein the ultraviolet absorber is a benzotriazole compound, a benzophenone compound, or a cyanoacrylate compound.

  According to the present invention, it is possible to provide a water-based surface protective agent that is suitable for protecting color printer prints and photographic images, is excellent in waterproofing, antifouling, scratching, fading and discoloration prevention, and is friendly to the environment and the human body. .

  The surface protective agent of the present invention is not limited to multicolor (monochrome) or single color printer prints and photos (digital camera photos output by a printer) that are output (printed out) using a printer such as a laser printer or an inkjet printer. This is for protecting the image surface (including silver salt photographs).

  In general, printers use PC paper, glossy paper, coated paper, coated paper, and other photographic paper as the recording paper surface in addition to plain paper. The surface protective agent of the present invention can be applied to any type of paper used in a printer, but it can be applied to photographic paper whose surface is coated with polyethylene and the ink and toner are exposed on the coated surface. It is effective and preferable to apply. Specific examples include multi-color printed matter by an inkjet printer, for example, posters, POPs, postcards such as New Year's cards, Christmas cards, photographs taken with a digital camera (so-called digital camera print photographs), and the like.

  The surface protective agent of the present invention can also be used for surface protection of general silver salt photographs (for example, snapshots, panel photographs, New Year's cards, summer greeting cards, Christmas cards, etc.).

  The surface protective agent of the present invention is 1.0 to 7.0 parts by weight of at least one resin selected from acrylic resin, alkyd resin and butyral resin, and 0.01 to 1.0 part by weight of antioxidant. And a composition containing 0.05 to 1.0 parts by weight of a preservative, 0.2 to 5.0 parts by weight of a water repellent, and 0.1 to 5 parts by weight of an ultraviolet absorber. It is.

Conventionally, surface protection agents using organic solvents that are not miscible with water such as cyclohexane and isohexane and easily volatilize have been known. However, in consideration of the recent increase in environmental awareness, such solvents are used as much as possible. Is preferably reduced. From such a point of view, in the present invention, an aqueous medium is used without using an organic solvent which has a large environmental load and is not miscible with water, such as cyclohexane and isohexane. In some cases, a lower alcohol having a relatively low load on the environment and the human body may be mixed in order to assist dissolution of each component in the medium or to speed up drying after application. Examples of the lower alcohol include linear or branched C _1-6 alcohols such as methanol, ethanol, isopropyl alcohol, butanol and mixtures thereof, and ethanol and / or isopropyl alcohol are preferred. Moreover, when adding a lower alcohol, it is preferable that the addition amount shall be 0.1-5 weight part.

  The amount of water as a medium is not particularly limited, but is preferably 70 to 100 parts by weight, and more preferably 75 to 95 parts by weight.

  In the present invention, at least one resin selected from acrylic resin, alkyd resin, and butyral resin is used as the binder. These resins form a film on the recording paper surface of the printer printed matter / photograph to physically protect the image surface, and impart waterproofness, antifouling property, scratch resistance, etc. to the recording paper surface. The acrylic resin described here is a polymer composed of acrylic monomers such as acrylic acid esters, methacrylic acid esters, acrylic acid derivatives, and methacrylic acid derivatives. As such an acrylic resin, for example, poly (meth) methyl acrylate, poly (meth) ethyl acrylate, poly (meth) acrylate propyl, poly (meth) acrylate butyl, (meth) acrylate methyl- ( (Meth) butyl acrylate copolymer, (meth) ethyl acrylate- (meth) butyl acrylate copolymer, ethylene- (meth) methyl acrylate copolymer, styrene- (meth) methyl acrylate copolymer, Methyl (meth) acrylate-butyl (meth) acrylate- (meth) acrylic acid-2-hydroxyethyl-styrene copolymer, ethyl (meth) acrylate-butyl (meth) acrylate- (meth) acrylic acid- Examples of the resin include a homopolymer or a copolymer containing a (meth) acrylic acid ester such as a 2-hydroxyethyl copolymer. In addition, (meth) acrylic acid means acrylic acid or methacrylic acid.

  The surface protective agent of the present invention contains an antioxidant. The antioxidant used in the present invention prevents oxidative deterioration and deterioration due to oxygen in the air on the surface of the printed matter / photograph of the printer, and also prevents discoloration, fading, fading, etc. of the toner or ink fixed on the surface of the printed matter. is there. Although it does not specifically limit as antioxidant which can be used by this invention, For example, things, such as a phenolic antioxidant, an amine type antioxidant, a sulfur type antioxidant, a phosphorus antioxidant, can be used. These 1 type (s) or 2 or more types are used.

  Examples of phenolic antioxidants (including hindered phenolic antioxidants) include butylated hydroxyanisole, 2,6-di-tert-butyl-4-ethylphenol [for example, products manufactured by Maruzen Petrochemical Co., Ltd. Name: Swanox 316 etc.], stearyl-β- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 2,2′-methylenebis (4-methyl-6-tert-butylphenol), 2,2 '-Methylenebis (4-ethyl-6-tert-butylphenol) [for example, manufactured by Maruzen Petrochemical Co., Ltd., trade name: Swanox 425, etc.], 4,4'-butylidenebis (3-methyl-6-tert-butylphenol) 3,9-bis [1,1-dimethyl-2- [β- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy] ethyl] 2,4,8,10-tetrixus Pillow [ 5,5] undecane, 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 1,3,5-trimethyl-2,4,6-tris (3,5 -Di-tert-butyl-4-hydroxybenzyl) benzene, tetrakis [methylene-3- (3 ', 5'-di-tert-butyl-4'-hydroxyphenyl) propionate] methane [for example, Ciba Geigy Japan Manufactured, trade name: Irganox 1010, etc.).

  Examples of the amine antioxidant include phenyl-β-naphthylamine, α-naphthylamine, N, N′-di-sec-butyl-p-phenylenediamine, phenothiazine, N, N′-diphenyl-p-phenylenediamine, 2, 6-di-tert-butyl-p-cresol, 2,6-di-tert-butylphenol, 2,4-dimethyl-6-tert-butyl-phenol, butylhydroxyanisole, 2,2′-methylenebis (4-methyl -6-tert-butylphenol), 4,4'-butylidenebis (3-methyl-6-tert-butylphenol), 4,4'-thiobis (3-methyl-6-tert-butylphenol), tetrakis [methylene-3 ( 3,5-Di-tert-butyl-4-dihydroxyphenyl) propionate] methane, 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butyl Emissions, and the like.

  Sulfuric antioxidants include dilauryl 3,3′-thiodipropionate, distearyl thiodipropionate, lauryl stearyl thiodipropionate, dimyristyl 3,3′-thiodipropionate, distearyl β, β ′ -Thiodipropionate, 2-mercaptobenzimidazole, dilauryl sulfide, etc. are mentioned.

  Examples of phosphorus antioxidants include triphenyl phosphite (for example, Johoku Chemical Co., Ltd., trade name: JP360), octadecyl phosphite, triisodecyl phosphite, trilauryl trithiophosphite, trinonylphenyl phosphite. [For example, Johoku Chemical Co., Ltd., trade name: JP351 etc.] and the like.

  The water repellent used in the present invention imparts water repellency and waterproofness to the printer print / photographic surface, and prevents moisture penetration and contamination. Examples of the water repellent include silicon compounds and fluorine compounds, and one or more of these are used. These water repellents are generally known widely and commercially available products can be used. For example, examples of the silicon compound water repellent include silane water repellent, siliconate water repellent, silicone (resin) water repellent and the like. Examples of the fluorine-based compound water repellent include compounds having a perfluoroalkyl group. Examples of the resin compound water repellent include commercially available natural wax and synthetic wax, acrylic resin water repellent and the like.

  The ultraviolet absorber used in the present invention shields and protects the printed matter / photographic surface from ultraviolet rays, and prevents discoloration, fading, fading, etc. of the toner or ink fixed on the printed matter surface. Although it does not specifically limit as an ultraviolet absorber which can be used by this invention, For example, a benzotriazole type compound, a benzophenone type compound, a cyanoacrylate type compound etc. can be illustrated, and these 1 type or 2 types are mentioned in this invention. Use the above. Specific examples of the benzotriazole compound include, for example, 2- (2′-hydroxy-5 ′-(meth) acryloyloxyethylphenyl) -2H-benzotriazole, 2- (2′-hydroxy-5 ′-(meta ) Acryloyloxyethylphenyl) -5-chloro-2H-benzotriazole, 2- (2'-hydroxy-5 '-(meth) acryloyloxypropylphenyl) -2H-benzotriazole, 2- (2'-hydroxy-5) '-(Meth) acryloyloxypropylphenyl) -5-chloro-2H-benzotriazole and the like can be exemplified. Specific examples of the benzophenone compound include, for example, 2-hydroxy-4-acryloxybenzophenone, 2-hydroxy-4-methacryloxybenzophenone, 2-hydroxy-5-acryloxybenzophenone, 2-hydroxy-5-methacryloxybenzophenone. 2-hydroxy-4- (acryloxy-ethoxy) benzophenone, 2-hydroxy-4- (methacryloxy-ethoxy) benzophenone, 2-hydroxy-4- (methacryloxy-diethoxy) benzophenone, 2-hydroxy-4- (acryloxy-triethoxy) ) Benzophenone and the like can be exemplified. Specific examples of the cyanoacrylic compound include, for example, ethyl-2-cyano-3,3′-diphenyl acrylate, methyl-2-cyano-3-methyl-3- (p-methoxyphenyl) acrylate, butyl-2- Examples thereof include cyano-3-methyl-3- (p-methoxyphenyl) acrylate.

  Since the surface protective agent of the present invention uses an aqueous medium, it may be rotted by various bacteria depending on the storage environment. Therefore, a preservative is blended to prevent this. The preservative is not particularly limited as long as it is soluble in an aqueous medium. For example, sodium dehydroacetate, paraben, sorbic acid, potassium sorbate, benzoic acid, sodium benzoate, paraoxybenzoic acid ester (for example, Ethyl, propyl, butyl, isobutyl, isopropyl, etc.), propionic acid, sodium propionate, etc., and these may be used alone or in combination.

  In addition, a silicone surfactant may be added to the surface protective agent of the present invention. The silicone-based surface lubricant improves the slipperiness and scratch resistance of the printed surface, and further imparts gloss to the printed surface. Examples of the silicone-based surface lubricant include polyether-modified silicone and amino-modified silicone.

  The surface protective agent of the present invention comprises 1.0 to 7.0 parts by weight of at least one resin selected from the acrylic resin, alkyd resin and butyral resin, and 0.01 to 1.0 part of the antioxidant. Parts by weight, preservative 0.05-1.0 parts by weight, water repellent 0.2-5.0 parts by weight, UV absorber 0.1-5 parts by weight, and optionally a lower alcohol Can be obtained by dissolving or dispersing 0.1 to 5.0 parts by weight in water.

  The method for applying the surface protective agent of the present invention to the surface of the printed matter / photograph is not particularly limited. For example, the surface protective agent of the present invention may be sprayed in the form of an aerosol, or the surface protective agent of the present invention is liquid so that the brush is used. Apply with a brush or brush, or immerse the printer print / photo in a surface protection agent solution in a container, or use a felt tip to prevent inhalation of solvents etc. into the human body during use. You may use as a form of a writing instrument. Specifically, the writing instrument is formed by filling the surface protective agent of the present invention into a container such as an aluminum can, a glass bottle, or a plastic container, and then sealing it with a lid penetrating a felt bar or the like as a pen tip. That is. In use, the surface protection agent of the present invention can be applied by allowing the surface protection agent in the container to penetrate through the felt bar to the nib and trace the printer print / photographic surface with the wet nib. In the case of aerosol spray, a part of the sprayed material diffuses into the air without adhering to the application surface, so there is a lot of waste during use and there is a risk of inhalation to the human body. The entire amount of the product can be used effectively, and the inhalation of organic solvents and the like into the human body can be greatly reduced. Further, when not in use, the pen tip may be capped so that the surface protecting agent does not diffuse from the tip. After the surface protective agent of the present invention is applied to the printer print / photographic surface, the coated surface is dried.

  Conventional surface protective agents have problems such as smearing of color unevenness, ink, etc., and paper curling or undulation after drying. Printer prints / photos to which the surface protective agent of the present invention is applied These problems do not arise. The surface protective agent of the present invention physically protects the image surface of a color print output from a silver salt photograph or a color printer from water and scratches, and can prevent deterioration due to oxidation and discoloration due to ultraviolet rays, and can be used for printing out. The image quality such as the hue and texture of the time can be maintained for a long time.

  Furthermore, since the surface protective agent of the present invention uses an aqueous medium without using a water-insoluble organic solvent such as cyclohexane, which has been conventionally used, it is odorless and non-irritating and uncomfortable during use. In addition, since it is highly safe for the environment and the human body, even children can use it with peace of mind.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further more concretely, this invention is not limited to these at all.

Production of Surface Protective Agent A surface protective agent of the present invention having the following composition was prepared as a felt pen type product and used in a water repellency test.
Acrylic resin (alkanolamine liquid) 3.0 parts by weight ethanol 3.0 parts by weight BHT / BHA (antioxidant) 0.3 parts by weight sodium dehydroacetate (preservative) 0.1 part by weight silicone resin (water repellent) 3.0 parts by weight
2- (3,5-Di-t-amyl-2-hydroxyphenyl) benzotriazole (UV absorber)
0.3 parts by weight of water Adjusted so that the total amount becomes 100 parts by weight

Water Repellency Test A water repellency test was conducted as follows according to JIS standard L-1092 (waterproof test).
A water repellency test apparatus (spray test) was used. 250 ml of water is sprayed from 25 to 30 seconds from the spray nozzle of the test apparatus.

  First, three test pieces of 20 cm × 20 cm are prepared for each printing paper. The test piece is attached to the holding frame so that the test piece is not wrinkled, and 250 ml of water is sprayed from the spray toward the test piece. After spraying the water, remove the holding frame from the table, hold one end of the frame horizontally, hold the test piece face down and lightly apply the other end to a hard object, and turn it 180 degrees to repeat the same operation. Remove excess water. While attached to the holding frame, the wet condition of the test piece is visually confirmed, and the average value of three tests is calculated.

Judgment criteria are as follows.
5: Wetting and water droplets do not adhere to the surface 4: There is no wetting on the surface, but a small amount of fine water droplets remain 3: There are small individual water droplets on the surface 2: There is wetting on the entire surface 1: From the surface It penetrates to the back and the whole is wet

In the water repellency test, the following papers were tested.
Example 1. Surface-protected plain paper Example 2. Surface protected photographic paper (C)
Example 3 Surface protected photographic paper (manufactured by E company)
Comparative Example 1 1. Comparative example of plain paper without surface protection Photo paper without surface protection (C company)
The results of the water repellency test are shown in Table 1 below.

  From the above test results, it was shown that the surface protective agent of the present invention is excellent in the effect of protecting the paper surface of the printed matter. In particular, in the case of photographic paper, its surface is effectively protected, it is possible to prevent stains and dirt due to moisture, and a beautiful color can be maintained over a long period of time.

  The surface protective agent of the present invention protects the surface of printed matter and photographs such as printers (laser printers, ink jet printers) from scratches, moisture, ultraviolet rays, and the like, and discolors, fades, fades and fades the toner or ink fixed on the surface of the printed matter. Prevent scratches. By applying the surface protective agent of the present invention to those printed matter and photographs, it is possible to maintain an image in a beautiful state for a long period of time. The surface protective agent of the present invention is water-based, and is gentle to the natural environment as compared with conventional ones, and has high safety for the human body.

Claims (4)

  1.0-7.0 parts by weight of at least one resin selected from acrylic resin, alkyd resin and butyral resin, 0.01-1.0 part by weight of antioxidant, 0.05% of preservative A printer print / photographic surface protective agent containing -1.0 part by weight, 0.2 to 5.0 parts by weight of a water repellent, and 0.1 to 5 parts by weight of an ultraviolet absorber.   The surface protective agent according to claim 1, further comprising 0.1 to 5.0 parts by weight of a lower alcohol.   The surface protective agent according to claim 1 or 2, wherein the water repellent is a silicon compound, a fluorine compound, or a resin compound.   The surface protective agent according to claim 1, wherein the ultraviolet absorber is a benzotriazole compound, a benzophenone compound, or a cyanoacrylate compound.