JPH0834879A - Diene copolymer latex and coating fluid composition made by using the same - Google Patents

Abstract

PURPOSE:To provide an excellent coating fluid composition for an offset printing paper. CONSTITUTION:A coating fluid composition for an offset printing paper, which contains 100 pts.wt. copolymer latex obtained by the emulsion polymerization of an aliphatic conjugated diene monomer, an ethylenically unsaturated carboxylic acid monomer and other monomer copolymerizable therewith and 0.01-5 pts.wt. (solids) aliphatic amine compound and wherein the diene copolymer latex is used in an amount of 6-20 pts.wt. (solids) based on 100 pts.wt. pigment for paper. The composition reveals excellent effects in terms of the water resistance of a coated paper, the applicability of an ink when wet, the surface strength and the gloss of a print.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gen-based copolymer latex providing excellent properties and a coating liquid composition for offset printing paper using the same.

[0002]

2. Description of the Related Art In recent years, with the rapid increase in demand for multicolor printed magazines, pamphlets, advertisements and packaging materials, the production of coated paper or coated paperboard has significantly increased. In particular, coated paper and
The required standard for the quality of the coating liquid composition for paper in coated paperboard is also becoming more sophisticated.

For example, in general offset printing,
Surface strength of coated paper / coated paperboard, that is, dry pick strength or water resistance involving dampening water, that is, wet topic strength, water absorption of coated paper / coated paperboard after transfer of dampening water, and uniform ink It is strongly desired to improve basic properties such as good ink receptivity (ink transfer property), dryness of transferred ink (ink setting property) and gloss of printed ink surface (printing gloss).

On the other hand, also in the production of coated paper / coated paperboard, for example, in the case of coated paper, the tendency for the coating speed to increase is becoming more prominent, which is accompanied by a significant increase in the coating operation. Frequent problems such as backing rolls and super calendar stains, streaks and scratches, which are obstacles, occur. Further, in coated paperboard, the amount of casein used tends to be reduced due to a sharp rise in casein. In this case, machine calendar stains and gloss calendar stains have occurred.

With respect to the above various printability and coating operability, pigment binders, particularly gen-based copolymer latex, which is the mainstream thereof, and various additives including water-proofing agents have been studied. It was For example, there is a method of increasing the amount of the gen-based copolymer latex used for the purpose of increasing the dry pick strength and the wet topic strength. Further, in a gen-based copolymer latex, a monomer having a specific type and composition including an ethylenically unsaturated carboxylic acid and an ethylenically unsaturated amine is emulsion-polymerized under special conditions to obtain a gen having a gelation point in a specific range. A coating liquid composition for paper using a system copolymer latex as a pigment binder prevents a decrease in water absorbency of coated paper / coated paperboard and prevents ink receptivity of the second and subsequent colors during offset printing. It has been proposed that a good coated paper / coated paperboard can be obtained (Japanese Patent Publication No. 59-49360). Further, from the viewpoint of an additive for a coating liquid composition for paper, a polyamide polyurea-formaldehyde aqueous solution, a urea-formaldehyde resin aqueous solution, a melamine-formaldehyde resin aqueous solution and the like are used (Japanese Patent Publication No. 59-32597 and Japanese Examined Patent Publication). 61-
No. 42931, Japanese Patent Publication No. 2-60798).

[0006]

However, when the amount of the diene copolymer latex used is increased, the dry pick strength and the wet topic strength are certainly improved, but the water absorption, the ink receptivity, and the ink setting are further improved. Sex significantly decreases. Further, although the gen-based copolymer latex modified by various means certainly has an improvement in ink receptivity and wet topic strength, it has a drawback of remarkably increasing the viscosity of the coating liquid, and has a sufficient ink content. An attempt to obtain the effect of improving the inking property causes a decrease in dry pick strength. Further, when the above additives are used, although the wet topic strength and the ink receptivity are certainly improved,
The dry pick strength remarkably decreases, and the viscosity of the coating liquid increases. Moreover, depending on the additive, formalin is generated during drying, which is also an environmental problem.
Then, this invention makes it a subject to propose the gen-type copolymer latex and the coating liquid composition for offset printing paper which solved such a conventional problem.

[0007]

The present invention is characterized by containing 0.01 to 5 parts by weight of an aliphatic amine compound in terms of solid content with respect to 100 parts by weight of a copolymer latex. In a coating liquid composition for offset printing paper, which comprises a copolymer latex and a paper pigment and a pigment binder as main components, the gen-based copolymer latex is 6 parts by weight based on 100 parts by weight of the paper pigment. ~ 20
It is intended to solve the above problems by proposing a coating liquid composition for offset printing paper, which is characterized by using a weight part and adding this.

The present invention will be described in more detail below. The aliphatic amine compound used in the present invention includes primary, secondary, and tertiary amine compounds, and is produced by, for example, reaction of ethylene dichloride or ethylene oxide with ammonia. There are unmodified amine compounds such as polyalkylene polyamines and modified amine compounds. Examples of modified amine compounds include various adducts and those obtained by polycondensation. Aliphatic polyaminoamide compounds are particularly effective, but polycondensates and adducts thereof are particularly preferable. The aliphatic polyaminoamide compound is an aliphatic compound having a plurality of active amino groups in the molecule and similarly having one or more amide groups. As an example of the above, it is prepared by polycondensation reaction of polyalkylene polyamine with a mixture of polymerized fatty acid (conventionally dimer acid) made from natural unsaturated fatty acid and other fatty acid which is added as necessary. There are things. Polymerized fatty acid is
Industrially, fatty acids containing a large amount of unsaturated components such as linole and linoleic acid from natural tall oil, soybean oil, safflower oil, etc. are heated without catalyst or in the presence of a catalyst such as clay or alumina silicate. Are synthesized by doing. As the polyalkylene polyamine, ethylenediamine, diethylenetriamine, triethylenetetramine,
Representative examples thereof include polyethylene polyamines such as tetraethylene pentamine and pentaethylene hexamine.

More recently, an adduct product obtained by previously reacting an epoxy resin, an imidazoline ring-containing aliphatic polyaminoamide product using a shorter chain dibasic acid or a dibasic acid having an aromatic nucleus, and an epoxidized unsaturated acid. , Alkenyl succinic acid, or modified aliphatic polyaminoamide products using dibasic cyclohexane ring-substituted compounds,
Furthermore, modified aliphatic polyaminoamide products using amino acid compounds and the like can be mentioned. Polyalkylene polyamines are the most basic amine raw materials, but instead of them, there are aliphatic polyamino amide products using polyoxyalkylene polyamines or metaxylylene polyamines. In particular, a modified aliphatic polyaminoamide product comprising a polymerized fatty acid / polyalkylene polyamine condensate, and further a polycondensed product of polymerized fatty acid / polyalkylene polyamine / polymerized fatty acid and an adduct of bisphenol A-diether or the like has the effect of the present invention. It is preferable because it can be exhibited well.

The aliphatic amine compound used in the present invention is based on 100 parts by weight of the gen copolymer latex.
0.01 to 5 parts by weight in terms of solid content, preferably 0.1
~ 3 parts by weight. If it is 0.01 part by weight or less, the effect of the present invention cannot be exhibited. If it exceeds 5 parts by weight, the viscosity of the coating liquid composition for paper of the present invention is too high,
Operational problems occur.

The gen-based copolymer latex of the present invention is
It can be obtained by emulsion-polymerizing an aliphatic conjugated diene monomer, an ethylenically unsaturated carboxylic acid monomer, and another monomer copolymerizable therewith. The aliphatic conjugated gen monomer is an essential component for imparting the required flexibility to the copolymer and increasing the adhesive strength. The amount used is 20 to 60% by weight, preferably 25 to 50 parts by weight, based on the weight of all monomers. When the amount used is 20% by weight or less, it becomes difficult to give the flexibility required to the copolymer, and 60% by weight
If it exceeds, the copolymer becomes too soft and the adhesive strength is reduced.

As the aliphatic conjugated gen monomer, for example,
1,3-Butadiene, pentadiene, 2-methyl-1,
3-Butagen, 2-chloro-1,3-Butagen, chloroprene and the like are preferable. These alone or 2
Used in combination of two or more species. The ethylenically unsaturated carboxylic acid monomer is an essential component for enhancing the dispersion stability, mainly mechanical stability and adhesive force of the copolymer latex. The amount used is 0.5-10 based on the weight of all monomers.
%, Preferably in the range of 1-5% by weight. If this amount is 0.5% by weight or less, it becomes difficult to impart essential dispersion stability to the copolymer latex, and sufficient adhesive strength cannot be obtained. On the other hand, if it exceeds 10% by weight, the viscosity of the copolymer latex and the coating liquid for paper becomes extremely high, which makes it difficult to handle, and the water resistance of the latex film is lowered, and the wet topic strength of the coated paper is lowered. Is not preferable.

Preferred examples of the ethylenically unsaturated carboxylic acid monomer include monobasic carboxylic acids such as acrylic acid, methacrylic acid, crotonic acid and cinnamic acid, fumaric acid and maleic acid such as itaconic acid. Examples thereof include dibasic carboxylic acid or its acid anhydride and monoalkyl ester. These ethylenically unsaturated carboxylic acid monomers may be used alone or in combination of two or more. Especially, among these, dibasic carboxylic acid
It can give high stability to the copolymer latex,
Further, the effects of the present invention can be exhibited satisfactorily, which is preferable.

The gen-based copolymer latex of the present invention is
Other monomer components 30 to 79.
5 wt% is required. By properly selecting this component, it is possible to impart various properties to the copolymer latex. The most representative and effective use of the examples of this component is the aromatic (di) vinyl monomer,
Then (meth) acrylic acid ester, vinyl cyanide,
It is a monomer such as ethylenic amide.

Examples of the aromatic (di) vinyl monomer include styrene, α-methylstyrene, chlorostyrene, alkylstyrene and divinylbenzene. Examples of the (meth) acrylic acid ester include methyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, hydroxyethyl (meth) acrylate, and further glycidyl (meth) acrylate. , Ethylene glycol di (meth) acrylate and the like.

Examples of the vinyl cyanide monomer include acrylonitrile and methacrylonitrile. Examples of the ethylenic amide monomer include (meth) acrylamide, N-methylol (meth) acrylamide, N-methoxymethylacryamide, and N-butoxymethylacrylamide. In addition, vinyl acetate such as vinyl acetate, vinyl chloride such as vinyl chloride and vinylidene chloride, aminoethyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, 2-vinylpydiline, 4-vinylpydiline. Examples thereof include ethylenic amines such as, and monomers such as sodium styrene sulfonate. These may be used alone or in combination of two or more depending on the purpose.

A known chain transfer agent can be used as a gel modifier for the gen-based copolymer latex. For example, as chain transfer agents containing elemental sulfur, t-dodecyl mercaptan, alkane thiols such as n-dodecyl mercaptan, thioalkyl alcohols such as mercaptoethanol and mercaptopropanol, thioglycolic acid, thioalkylcarboxylic acids such as thiopropionic acid, Examples thereof include thiocarboxylic acid alkyl esters such as thioglycolic acid octyl ester and thiopropionic acid octyl ester, and sulfides such as dimethyl sulfide and diethyl sulfide. In addition, dimers of α-alkylstyrene, terpinolene, dipentene,
Examples thereof include t-terpinene.

Further, the gen-based copolymer latex is
Surfactants and polymerization initiators used in ordinary emulsion polymerization are used. Next, as a manufacturing method, water, a surfactant,
In a dispersion system in which a monomer, a polymerization initiator and, if necessary, other raw materials are the basic constituents, these raw materials are obtained as an aqueous dispersion of copolymer particles by radical emulsion polymerization. Generally, the copolymer concentration is 40
-60% by weight.

The gen-based copolymer latex of the present invention is
6 to 20 in terms of solid content based on 100 parts by weight of paper pigment
Contains by weight. When the amount is 6 parts by weight or less, not only the dry pick strength and the wet topic strength sharply decrease but also the printing gloss decreases. On the other hand, if it exceeds 20 parts by weight, the ink receptivity and the ink setting property are significantly deteriorated. The pigment for paper used in the coating liquid composition for offset printing paper of the present invention includes, for example, clay, calcium carbonate, titanium oxide, satin white, and other minerals usually used in coating liquid compositions for offset printing paper. And organic pigments such as polystyrene-based fine particles called plastic pigments.

Further, the coating liquid composition for offset printing paper of the present invention also uses various additives which are usually used, for example, a dispersant, a thickener, a neutralizer, a bactericide and an antifoaming agent. It is possible. When the gen-based copolymer latex of the present invention is used as a pigment binder, it can be carried out in a usual manner. That is, the gen-based copolymer latex is mixed with an inorganic pigment and / or an organic pigment, a water-soluble polymer, and various additives in water in which a dispersant is dissolved to uniformly disperse the latex. Then, this coating liquid composition can be applied to the base paper for coating by a usual method such as various blade coaters, roll coaters and air knife coaters.

[0021]

EXAMPLES Next, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. In addition, each physical property was calculated | required according to the following measuring method. (1) Coating liquid viscosity: BL type viscometer (60 rpm.N
O. 3 spindles) at 25 ° C.

(2) Dry pick: Using an RI printing tester, printing ink (SD Super Strength Deluxe 50 Red B; Tack value 15, manufactured by Toka Dye Co., Ltd.) 0.4cc was overprinted 3 times, and appeared on a rubber roll. Line the picking condition on another mount and observe the degree.

The evaluation was carried out by a 5-point relative evaluation method, and the smaller the picking phenomenon, the higher the score. (3) Wet Topic: Using a RI printing tester, the coated paper surface was dampened with a water-absorbing roll, and then the printing ink (SD Super Deluxe 50 Beni B; Tack value 10, manufactured by Toka Pigment Co., Ltd.). Print 4cc once, and line the picked condition appearing on the rubber roll on another mount, and observe the degree.

The evaluation was carried out by a 5-point relative evaluation method, and the smaller the picking phenomenon, the higher the score. (4) Ink inking property: Using an RI printing tester, water was applied with a molton roll, and then solid printing was performed under conditions that did not cause paper peeling, and the ink transfer property (printed ink density) was visually observed. Observe at.

The evaluation was carried out by a 5-point relative evaluation method, and the higher the ink transfer property, the higher the score. (5) White paper gloss: Murakami type GM-26 on the coated paper surface
Measured at 75 ° -75 ° with a D-type gloss meter. The higher the number, the better the evaluation.

(6) Printing gloss: Using an RI printing tester, coated paper was solidly printed with 0.4 cc of printing ink (SD Super Deluxe 50 Indigo, manufactured by Toka Dye Co., Ltd.), and after drying, Murakami GM-26D. It was measured at 60 ° -60 ° with a type gloss meter. The higher the number, the better the evaluation.

(7) Ink setting property: Using an RI printing tester, a coated paper was solidly printed with 0.4 cc of printing ink (SD Super Deluxe 50 Ai, manufactured by Toka Dye Co., Ltd.), and backed on another mount. Remove and observe the ink density. The evaluation was performed by a 5-point relative evaluation method, and the lower the ink density, the higher the score.

(8) Blister resistance: Using an RI printer, printing ink (WebbZett yellow,
(Dainippon Ink) 0.3cc solid printing. The printed coated paper is cut into an appropriate size, and the test piece is immersed in a silicone oil thermostatic bath adjusted to a predetermined temperature to observe whether blisters occur. Perform the test while changing the temperature of the constant temperature bath to obtain the minimum temperature at which blister formation is observed. The higher this temperature, the better the blister resistance.

[0029]

Example 1 As a pigment binder, an unsaturated dibasic acid-modified styrene / butadiene-based copolymer latex (L160
8, Asahi Kasei Kogyo Co., Ltd.) 9.1 parts by weight, and as a polyaminoamide compound, 0.1 parts by weight of an aliphatic polyalkylene polyamine condensate "Ancamide 502 (ACI JAPAN sold)" in terms of solid content A coating liquid composition having the following formulation was prepared by using the system copolymer latex by the method described below to obtain a coating liquid composition for offset printing paper. Composition ratio of coating liquid for offset printing paper Clay (Ultra Coat, manufactured by EMC) 70 parts by weight Calcium carbonate (Super 1700, manufactured by Maruo Calcium 30) Dispersant (sodium polyacrylate) 0.2 〃 "Aron T-40 , Toagosei ”Neutralizer (caustic soda) 0.1 〃 Starch (Oji Ace A, Oji Constarch) 3 〃 Gen-based copolymer latex 10 〃 First, dispersant (sodium polyacrylate) 0.2 By weight, 0.1 part by weight of a neutralizing agent (caustic soda) was dispersed in a predetermined amount of water, and 70 parts by weight of clay and 30 parts by weight of calcium carbonate were added to prepare a pigment slurry. Next, 3 parts by weight of starch and 10 parts by weight of the gen-based copolymer latex, which had been previously solubilized, were added and mixed by stirring,
An appropriate amount of water was added to prepare a paper coating liquid having a final solid content of 65% by weight.

Next, the base paper for coating was coated with the coating liquid for paper with a Meyer bar so that the coating amount was 14 g / m ^2, and dried by a hot air dryer (150 ° C. × 30 seconds). . Then, apply this coated paper to a super calendar (roll temperature 50
℃, roll pressure 150kg / cm, 2 passes), temperature 23
Various measurements were carried out using a test piece that was temperature-controlled and humidity-controlled in a constant temperature and humidity chamber at a temperature of 65 ° C. and a humidity of 65%. The results are shown in Table 1.

[0031]

Example 2 As a pigment binder, an unsaturated dibasic acid-modified styrene / butadiene-based copolymer latex (L160
(Asahi Kasei Kogyo Co., Ltd.) 9.1 parts by weight, and as a polyaminoamide compound, 0.1 parts by weight of an aliphatic polyalkylene polyamine condensate "Ankamide 503 (ACI JAPAN sold)" in terms of solid content The same composition and operation as in Example 1 were carried out except that the system copolymer latex was used, and test pieces having the composition shown in Table 1 were prepared and various measurements were performed. The results are shown in Table 1.

[0032]

Examples 3 to 4 In Example 3, as a pigment binder, 9.75 parts by weight of an unsaturated dibasic acid-modified styrene / butadiene-based copolymer latex (L1608, manufactured by Asahi Kasei Corporation) was used as a polyaminoamide compound. Aliphatic polyalkylene polyamine condensate "Ancamide 506 (A
CI Japan sale) ”, a gen-based copolymer latex containing 0.25 parts by weight, and Example 4 is a gen-based copolymer latex (L160) which is a pigment binder.
8. Asahi Kasei Kogyo Co., Ltd.) 9.98 parts by weight, as a polyaminoamide compound, an aliphatic polyalkylene polyamine condensate "Ancamide 506 (ACI JAPAN
“Sale” ”was used to perform the same composition and operation as in Example 1 except that a gen-based copolymer latex containing 0.02 part by weight in terms of solid content was used to prepare a test piece having the composition shown in Table 1. Various measurements were performed. The results are shown in Table 1.

[0033]

[Example 5] Unsaturated dibasic acid-modified styrene / butadiene-based copolymer latex (L162 as a pigment binder)
2, Asahi Kasei Kogyo Co., Ltd.) 9.98 parts by weight, as a polyaminoamide compound, an aliphatic polyalkylene polyamine condensate "Ancamide 506 (ACI JAPAN
"Sales)" was used to prepare test pieces having the composition shown in Table 1 by performing the same composition and operation as in Example 1 except that a gen-based copolymer latex containing 0.02 part by weight of solid content was used. The measurement was performed. The results are shown in Table 1.

[0034]

[Examples 6 to 7] In Example 6, as a pigment binder, 9.9 parts by weight of an unsaturated dibasic acid-modified styrene / butadiene-based copolymer latex (L1537, manufactured by Asahi Kasei Kogyo) was used as a polyaminoamide compound. Aliphatic polyalkylene polyamine condensate "Ancamide 503 (AC
I JAPAN sales) ”, 0.1 parts by weight in terms of solid content of a gen-based copolymer latex, and Example 7 is
Gen-based copolymer latex (L
1537, manufactured by Asahi Kasei Kogyo Co., Ltd.) to 9.95 parts by weight, as a polyaminoamide compound, an aliphatic polyalkylene polyamine condensate "Ancamide 503 (ACI JA
Example 1 except that a gen-based copolymer latex containing 0.05 part by weight of solid content) is used.
The same composition and operation as described in (1) above were performed to prepare test pieces having the compositions shown in Table 1 and various measurements were performed. The results are shown in Table 1.

[0035]

[Example 8] Unsaturated dibasic acid-modified styrene / butadiene-based copolymer latex (L153 as a pigment binder)
7. Asahi Kasei Kogyo Co., Ltd.) A gen-based copolymer latex containing 0.1 parts by weight in terms of solid content of "Ancamine 1769 (ACI JAPAN sold)", which is an aggut product of triethylenetetramine and propylene oxide, based on 9.9 parts by weight. The same composition and operation as in Example 1 were carried out except that was used to prepare a test piece having the composition shown in Table 1, and various measurements were performed. The results are shown in Table 1.

[0036]

[Comparative Examples 1 and 2] In Comparative Example 1, as a pigment binder, 9.9991 parts by weight of an unsaturated dibasic acid-modified styrene / butadiene-based copolymer latex (L1608, manufactured by Asahi Kasei Corporation) was used as a polyaminoamide compound. Aliphatic
Polyalkylene polyamine condensate "Ancamide 503
(ACI JAPAN sales) "in solid content conversion 0.00
The gen-based copolymer latex contained in an amount of 09 parts by weight, and Comparative Example 2 was prepared by adding 9.5 parts by weight of a gen-based copolymer latex (L1608, manufactured by Asahi Chemical Industry Co., Ltd.), which is a pigment binder, to a fat as a polyaminoamide-based compound. Group polyalkylene polyamine condensate "Ancamide 503 (A
CI JAPAN sale) ”was used to perform the same composition and operation as in Example 1 except that a gen-based copolymer latex containing 0.5 part by weight in terms of solid content was used to prepare a test piece having the composition shown in Table 1. Then, various measurements were performed. The results are shown in Table 1.

[0037]

[Comparative Examples 3 to 4] In Comparative Example 3, as a pigment binder, 9.9991 parts by weight of an unsaturated dibasic acid-modified styrene / butadiene-based copolymer latex (L1537, manufactured by Asahi Kasei Corporation) was used as a polyaminoamide compound. Aliphatic
Polyalkylene polyamine condensate "Ancamide 503
(ACI JAPAN sales) "in solid content conversion 0.00
The gen-based copolymer latex containing 09 parts by weight, and Comparative Example 4 was 9.5 parts by weight of the gen-based copolymer latex (L1537, manufactured by Asahi Chemical Industry Co., Ltd.), which is a pigment binder. Group polyalkylene polyamine condensate "Ancamide 503 (A
The same composition and operation as in Example 1 were carried out except that 0.5 part by weight in terms of solid content was used, and a test piece having the composition shown in Table 1 was prepared and various measurements were performed. The results are shown in Table 1.

[0038]

[Comparative Examples 5 to 6] Comparative Example 5 is 10 parts by weight of an unsaturated dibasic acid-modified styrene / butadiene diene copolymer latex (L1608, manufactured by Asahi Kasei Kogyo) as a pigment binder, and Comparative Example 6 is a pigment binder. The same composition and operation as in Example 1 were carried out except that 10 parts by weight of Gen-based copolymer latex (L1537, manufactured by Asahi Kasei Co., Ltd.) was used.
Test pieces having the compositions shown in Table 1 were prepared and various measurements were performed.
The results are shown in Table 1.

[0039]

[Examples 9 to 11] In Example 8, as a pigment binder, 6.8 parts by weight of an unsaturated dibasic acid-modified styrene / butadiene-based copolymer latex (L1608, manufactured by Asahi Kasei Corporation) was used as a polyaminoamide compound. Aliphatic polyalkylene polyamine condensate "Ancamide 506 (A
CI JAPAN sale) ”, 0.2 parts by weight in terms of solid content of a gen-based copolymer latex, and Example 9
Is 11.88 parts by weight of a gen-based copolymer latex (L1608, manufactured by Asahi Kasei Kogyo Co., Ltd.) which is a pigment binder, and as a polyaminoamide-based compound, an aliphatic polyalkylene polyamine condensate "Ancamide 506 (AC
I JAPAN sale) ”, and a gen-based copolymer latex containing 0.12 parts by weight in terms of solid content, and further, Example 1
0 is 17.82 parts by weight of a gen-based copolymer latex (L1608, manufactured by Asahi Chemical Industry Co., Ltd.), which is a pigment binder, and is used as a polyaminoamide-based compound as an aliphatic / polyalkylene polyamine condensate “Ancamide 506 (AC
I JAPAN sales) ”was used to perform the same composition and operation as in Example 1 except that a gen-based copolymer latex containing 0.18 parts by weight in terms of solid content was used to prepare a test piece having a composition shown in Table 2. , Various measurements were performed. Table 2 shows the results.

[0040]

Comparative Examples 7 to 8 In Comparative Example 7, as a pigment binder, 3.96 parts by weight of an unsaturated dibasic acid-modified styrene / butadiene-based copolymer latex (L1608, manufactured by Asahi Kasei Kogyo Co., Ltd.) was used as a polyaminoamide compound. Aliphatic polyalkylene polyamine condensate "Ancamide 506 (A
CI JAPAN sale) ”, a gen-based copolymer latex containing 0.04 parts by weight in terms of solid content, and Comparative Example 8
Is 21.78 parts by weight of a gen-based copolymer latex (L1608, manufactured by Asahi Kasei Kogyo Co., Ltd.) which is a pigment binder, and is an aliphatic polyalkylenepolyamine condensate "Ancamide 506 (AC
I JAPAN sale) ”was used, and the same composition and operation as in Example 1 were carried out except that a gen-based copolymer latex containing 0.22 parts by weight in terms of solid content was used to prepare a test piece having the composition shown in Table 2. Then, various measurements were performed. Table 2 shows the results.

[0041]

[Table 1]

[0042]

[Table 2]

[0043]

By using the gen-based copolymer latex containing the aliphatic amine-based compound obtained in the present invention in the coating liquid composition for offset printing paper, the water resistance and wettability of the coated paper can be improved. Not only is it excellent in ink receptivity at that time, but it can also exert excellent effects on surface strength and printing gloss.

Claims (3)

[Claims] 1. An aliphatic amine compound is added in an amount of 0.01 to 5 in terms of solid content based on 100 parts by weight of the copolymer latex.
A gen-based copolymer latex characterized by being contained in an amount of 1 part by weight. 2. The gen-based copolymer latex according to claim 1, wherein the aliphatic amine-based compound is an aliphatic polyaminoamide-based compound. 3. A coating liquid composition for offset printing paper, which comprises a pigment for paper and a pigment binder as main components, and the gen-based composition according to claim 1 or 2 as a pigment binder component with respect to 100 parts by weight of the pigment for paper. A coating liquid composition for offset printing paper, which comprises adding 6 to 20 parts by weight of polymer latex in terms of solid content.