KR102508101B1 - A carbon black dispersion composition with excellent dispersion property - Google Patents

Abstract

The present invention relates to a carbon black dispersion composition comprising carbon black, a solvent and a dispersant, and more particularly, has excellent dispersion stability, can maintain excellent dispersion characteristics for a long period of time, and can be stably used in plastics, inks, cosmetics, rubber, etc. It relates to a carbon black dispersion composition that can be.
The present invention can provide a carbon black dispersion composition that has excellent dispersion stability, can maintain excellent dispersion characteristics for a long period of time, and can be stably used in plastics, inks, cosmetics, rubber, etc., by using carbon black, a solvent and a dispersant.

Description

Carbon black dispersion composition with excellent dispersion property {A carbon black dispersion composition with excellent dispersion property}

The present invention relates to a carbon black dispersion composition comprising carbon black, a solvent and a dispersant, and more particularly, has excellent dispersion stability, can maintain excellent dispersion characteristics for a long period of time, and can be stably used in plastics, inks, cosmetics, rubber, etc. It relates to a carbon black dispersion composition that can be.

Carbon black is a pigment with high blackness and has excellent colorability, electrical conductivity, weatherability, and chemical resistance, and is widely used as a reinforcing agent, filler, or light-shielding agent for plastics or elastomers.

However, carbon black has a problem in that its primary particle diameter is fine and porous, and its specific surface area is high, so it has a strong tendency to form agglomerates due to strong affinity between particles, resulting in poor dispersion stability.

In addition, since carbon black is hydrophobic and has low water wettability, it is very difficult to disperse it in a high concentration in an aqueous system.

In this regard, Korean Patent Registration No. 10-1540844 discloses two or more additives selected from the group consisting of 20 to 40% by weight of carbon black and polyethylene glycol cetyl ether, lauryl alcohol of polyoxyether and polyethylene glycol of hydrated castor oil Disclosed is an aqueous carbon black dispersion composition for cosmetics containing 6 to 15% by weight.

However, the above technique has poor dispersion stability of the composition, which reduces processability and makes it difficult to manufacture products of uniform quality.

Therefore, it is necessary to research and develop a carbon black dispersion composition that has excellent dispersion stability and can maintain excellent dispersion characteristics for a long period of time.

Korean Patent Registration No. 10-1540844

The present invention has been made to solve the above problems, and provides a carbon black dispersion composition that has excellent dispersion stability, can maintain excellent dispersion characteristics for a long time, and can be stably used in plastics, inks, cosmetics, rubber, etc. aims to

In order to achieve the above object, the present invention provides a carbon black dispersion composition comprising carbon black, a solvent and a dispersant.

In one embodiment of the present invention, it is characterized in that it comprises 1 to 30 parts by weight of carbon black and 5 to 30 parts by weight of a dispersant based on 100 parts by weight of the solvent.

In one embodiment of the present invention, the dispersant is characterized in that the compound of the formula (1).

[Formula 1]

(In Formula 1, n is 1 to 30, and m is 5 to 1,000.)

In one embodiment of the present invention, the dispersant is characterized in that the compound of the formula (2).

[Formula 2]

(In Formula 2, m is 5 to 1,000.)

In one embodiment of the present invention, the dispersing agent is characterized in that it further comprises a compound of Formula 3 below.

[Formula 3]

(In Formula 3, m is 5 to 1,000.)

In addition, the present invention provides a product containing the carbon black dispersion composition, characterized in that the product is plastic, ink, cosmetic or rubber.

The present invention can provide a carbon black dispersion composition that has excellent dispersion stability and can maintain excellent dispersion characteristics for a long period of time by using carbon black, a solvent, and a dispersant, and can be stably used in plastics, inks, cosmetics, rubber, and the like.

1 shows changes in pH, viscosity, conductivity and particle size of the carbon black dispersion composition of the present invention over time.
2 shows the shape of carbon black particles distributed in the carbon black dispersion composition of the present invention.

The present invention will be described in detail based on the following examples. The terms, examples, etc. used in the present invention are merely exemplified to explain the present invention in more detail and help the understanding of those skilled in the art, and the scope of the present invention should not be construed as being limited thereto.

Technical terms and scientific terms used in the present invention represent meanings commonly understood by those of ordinary skill in the art to which this invention belongs, unless otherwise defined.

The present invention relates to a carbon black dispersion composition comprising carbon black, a solvent and a dispersant.

The composition may include 1 to 30 parts by weight of carbon black and 5 to 30 parts by weight of a dispersant based on 100 parts by weight of a solvent.

The carbon black dispersion composition is a composition in which carbon black particles are dispersed in a solvent such as distilled water or alcohol, and the carbon black represents a low or high viscosity dispersed phase in the composition, and is used as a filler for plastics, inks, cosmetics, rubber, etc. Widely used.

The carbon black is a pigment with high blackness and has excellent colorability, electrical conductivity, weatherability, and chemical resistance, and is widely used as a reinforcing agent, filler, or light-shielding agent for plastics or elastomers.

Carbon black is used in an amount of 1 to 30 parts by weight based on 100 parts by weight of the solvent. If the content of carbon black is less than 1 part by weight, it is difficult to develop characteristics such as colorability and electrical conductivity, and if the content exceeds 30 parts by weight, processability and dispersibility are It is lowered.

In addition, the surface of the carbon black particles may be treated with a copolymer of an acrylate group-containing silane coupling agent and an acrylic acid monomer.

Acrylate group-containing silane coupling agents include 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, 3-methacryloxypropyl trie Toxysilane, 3-acryloxypropyltrimethoxysilane, methacryloxymethyltriethoxysilane, methacryloxymethyltrimethoxysilane, and the like.

Acrylic acid monomers include acrylic acid, methacrylic acid, methyl acrylic acid, ethyl acrylic acid, butyl acrylic acid, 2-ethylhexyl acrylic acid, decyl acrylic acid, methyl methacrylic acid, ethyl methacrylic acid, butyl methacrylic acid, 2-ethylhexyl methacrylic acid, Decyl methacrylic acid and the like.

The weight ratio of the acrylate group-containing silane coupling agent and the acrylic acid monomer is preferably 20 to 40:60 to 80, and the dispersibility and processability of the composition can be maximized within the above range.

The content of the copolymer is preferably 1 to 10 parts by weight based on 100 parts by weight of carbon black. If the content is less than 1 part by weight, it is difficult to expect improved dispersibility, and if it exceeds 10 parts by weight, processability is reduced.

In addition, the carbon black may be additionally surface treated using a copolymer of an acrylate group-containing silane coupling agent and 2-hydroxyethyl acrylate (HEA).

The weight ratio of the silane coupling agent containing an acrylate group and 2-hydroxyethyl acrylate is preferably 20 to 40:60 to 80, and dispersibility and processability of the composition can be maximized within the above range.

At this time, a copolymer of an acrylate group-containing silane coupling agent and an acrylic acid monomer; And the weight ratio of the copolymer of the acrylate group-containing silane coupling agent and 2-hydroxyethyl acrylate is preferably 60 to 90:10 to 40.

In addition, the carbon black may be additionally surface treated using a copolymer of an acrylate group-containing silane coupling agent, an acrylic acid monomer, and 2-hydroxyethyl acrylate (HEA).

The weight ratio of the acrylate group-containing silane coupling agent, acrylic acid monomer, and 2-hydroxyethyl acrylate is preferably 2 to 10:100:20 to 50, and processability and dispersibility of the composition are maximized in the above numerical range. can

At this time, a copolymer of an acrylate group-containing silane coupling agent and an acrylic acid monomer; copolymers of a silane coupling agent containing an acrylate group and 2-hydroxyethyl acrylate; And the weight ratio of the silane coupling agent containing an acrylate group, the copolymer of acrylic acid monomer and 2-hydroxyethyl acrylate is preferably 100:20 to 40:2 to 15.

The solvent is used to improve dispersibility by adjusting the concentration of the composition and inducing reactions of components included in the composition, and distilled water, methanol, ethanol, propanol, isopropanol, butanol, etc. may be used without limitation.

The dispersant improves dispersion stability of carbon black in a solvent so that excellent dispersion characteristics can be maintained for a long period of time.

The dispersant is used in an amount of 5 to 30 parts by weight based on 100 parts by weight of the solvent. If the content of the dispersant is less than 5 parts by weight, the dispersibility is lowered, and if the content exceeds 30 parts by weight, durability and heat resistance are lowered.

The dispersant is preferably a styrene-maleic acid copolymer compound represented by Formula 1 below.

[Formula 1]

(In Formula 1, n is 1 to 30, and m is 5 to 1,000.)

The dispersant of the present invention is preferably a compound represented by the following formula (2).

[Formula 2]

(In Formula 2, m is 5 to 1,000.)

In addition, the dispersant may further include a compound represented by Formula 3 below.

[Formula 3]

(In Formula 3, m is 5 to 1,000.)

In this case, the weight ratio of the compound of Formula 2 and the compound of Formula 3 is preferably 60 to 80:20 to 40, and when the above numerical range is satisfied, dispersibility and durability of the composition can be maximized.

In addition, the dispersant may further include a compound represented by Formula 4 below.

[Formula 4]

(In Formula 4, m is 5 to 1,000.)

In this case, the weight ratio of the compound of Formula 2, the compound of Formula 3 and the compound of Formula 4 is preferably 100:20 to 40:5 to 15, and when the above numerical range is satisfied, the dispersibility and durability of the composition can be maximized. there is.

In addition, the composition may further include a copolymer of an acrylate group-containing silane coupling agent and an acrylic acid monomer.

The copolymer may improve dispersibility and durability of the composition.

The weight ratio of the acrylate group-containing silane coupling agent and the acrylic acid monomer is preferably 20 to 40:60 to 80, and the dispersibility and processability of the composition can be maximized within the above range.

The copolymer is used in an amount of 2 to 10 parts by weight based on 100 parts by weight of the solvent, and when the content is less than 2 parts by weight, the effect of addition is insignificant, and when the content exceeds 10 parts by weight, processability is reduced.

In addition, the composition may further include a copolymer of an acrylate group-containing silane coupling agent and 2-hydroxyethyl acrylate (HEA).

The copolymer may improve dispersibility and durability of the composition.

The weight ratio of the acrylate group-containing silane coupling agent and 2-hydroxyethyl acrylate is preferably 20 to 40:60 to 80, and dispersibility and durability of the composition can be maximized within the above range.

The copolymer is used in an amount of 2 to 10 parts by weight based on 100 parts by weight of the solvent, and when the content is less than 2 parts by weight, the effect of addition is insignificant, and when the content exceeds 10 parts by weight, processability is reduced.

In addition, the composition may further include a copolymer of an acrylate group-containing silane coupling agent, an acrylic acid monomer, and 2-hydroxyethyl acrylate (HEA).

The copolymer may improve dispersibility and durability of the composition.

The weight ratio of the acrylate group-containing silane coupling agent, acrylic acid monomer and 2-hydroxyethyl acrylate is preferably 2 to 10:100:20 to 50, and the dispersibility, durability, etc. of the composition can be maximized in the above numerical range. can

The copolymer is used in an amount of 2 to 10 parts by weight based on 100 parts by weight of the solvent, and when the content is less than 2 parts by weight, the effect of addition is insignificant, and when the content exceeds 10 parts by weight, processability is reduced.

In addition, the present invention relates to a product containing the carbon black dispersion composition, and the product is characterized in that it is plastic, ink, cosmetic or rubber.

The present invention will be described in detail through the following examples. The following examples are only exemplified for the practice of the present invention, and the content of the present invention is not limited by the following examples.

(Example 1)

Mix 62% by weight of water and 8% by weight of ammonia as solvents with 30% by weight of a polymerization composition prepared by preparing maleic anhydride and styrene at 25% by mole and 75% by mole, respectively, and proceed with the reaction at 55 ° C. Thus, a styrene-maleic anhydride copolymer of n = 3 and m = 100 was obtained.

Next, 10 parts by weight of water and 0.1 part by weight of dicumyl peroxide were added to 100 parts by weight of the styrene-maleic anhydride copolymer, and a ring-opening reaction was performed in a nitrogen atmosphere at 185 ° C. for 6 hours to obtain a styrene-maleic acid copolymer (Formula 2 of the compound) was obtained.

A carbon black dispersion composition was prepared by mixing 100 parts by weight of distilled water, 10 parts by weight of carbon black, and 20 parts by weight of the compound of Formula 2.

The carbon black dispersion composition showed excellent values in terms of pH stability, electrical conductivity stability, viscosity stability, and particle size stability (FIG. 1).

In addition, it can be confirmed that the carbon black particles present in the composition have a diameter of 30 to 100 nm and exist in an irregular shape rather than a sphere (FIG. 2).

(Example 2)

A carbon black dispersion composition was prepared in the same manner as in Example 1, except that 2 parts by weight of the compound of Formula 2 was used.

(Example 3)

A carbon black dispersion composition was prepared in the same manner as in Example 1, except that 35 parts by weight of the compound of Formula 2 was used.

(Example 4)

62% by weight of water and 8% by weight of ammonia as solvents were mixed with 30% by weight of a polymerization composition prepared by maleic anhydride and styrene at a molar ratio of 1:2, and the reaction was carried out at 55 ° C. n = 2, A styrene-maleic anhydride copolymer of m=100 was obtained.

Next, 10 parts by weight of water and 0.1 part by weight of dicumyl peroxide were added to 100 parts by weight of the styrene-maleic anhydride copolymer, and a ring-opening reaction was performed in a nitrogen atmosphere at 185 ° C. for 6 hours to obtain a styrene-maleic acid copolymer (Formula 3 of the compound) was obtained.

A carbon black dispersion composition was prepared in the same manner as in Example 1, except that 10 parts by weight of the compound of Formula 3 was additionally used.

(Example 5)

A copolymer was prepared by copolymerizing 30% by weight of 3-methacryloxypropyltrimethoxysilane and 70% by weight of methacrylic acid.

A carbon black dispersion composition was prepared in the same manner as in Example 4, except that 5 parts by weight of the copolymer was additionally used.

(Comparative Example 1)

A carbon black dispersion composition was prepared in the same manner as in Example 1, except that the compound of Formula 2 was not used.

(evaluation)

(1) Dispersion stability

The compositions prepared in Examples and Comparative Examples were placed in a container and allowed to stand at 25° C. for 24 hours, and then the particle size was measured. At this time, the size of the initial particles and the size of the particles after standing for 24 hours were measured, and the increase rate of the particle size was calculated.

(2) color difference meter

The color of the compositions prepared in Examples and Comparative Examples was measured using a color difference meter. At this time, the L* value means brightness and lightness, and the lower the L* value, the closer it is to black, which means that the particle size is the smallest.

division Example comparative example One 2 3 4 5 One Particle size increase rate (%) 1.8 2.9 3.1 1.0 0.7 12.6 Brightness (L*) 24.1 25.3 25.1 23.1 22.6 26.3 Redness (a*) 0.31 0.29 0.30 0.32 0.26 0.35 Yellowness (b*) 0.25 0.33 0.27 0.22 0.26 0.26

As can be seen in Table 1, Examples 1 to 5 according to the present invention have excellent dispersion stability, and in particular, Examples 1, 4 and 5 exhibited the most excellent properties.

On the other hand, in the case of Comparative Example 1, the dispersion stability was inferior to that of Examples.

Claims (6)

In the carbon black dispersion composition comprising carbon black, a solvent and a dispersant,
The composition includes 1 to 30 parts by weight of carbon black and 5 to 30 parts by weight of a dispersant based on 100 parts by weight of a solvent,
The carbon black is a copolymer of an acrylate group-containing silane coupling agent and an acrylic acid monomer; copolymers of a silane coupling agent containing an acrylate group and 2-hydroxyethyl acrylate (HEA); and a copolymer of an acrylate group-containing silane coupling agent, an acrylic acid monomer and 2-hydroxyethyl acrylate,
a copolymer of the above acrylate group-containing silane coupling agent and an acrylic acid monomer; copolymers of a silane coupling agent containing an acrylate group and 2-hydroxyethyl acrylate; And the weight ratio of the copolymer of the acrylate group-containing silane coupling agent, acrylic acid monomer and 2-hydroxyethyl acrylate is 100:20 to 40:2 to 15,
The carbon black dispersion composition, characterized in that the dispersant is a compound represented by the following formula (1).
[Formula 1]

(In Formula 1, n is 1 to 30, and m is 5 to 1,000.)
delete delete According to claim 1,
The carbon black dispersion composition, characterized in that the dispersant is a compound represented by the following formula (2).
[Formula 2]

(In Formula 2, m is 5 to 1,000.)
delete In the product comprising the carbon black dispersion composition of claim 1,
The product is characterized in that the plastic, ink, cosmetics or rubber.

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