阅读说明：本技术 一种可耐潮湿生产和保存的墨粉及其制备方法 (Ink powder capable of resisting moisture production and storage and preparation method thereof ) 是由 汤若狮 黄晓玲 于 2021-08-12 设计创作，主要内容包括：本发明公开的是一种可耐潮湿生产和保存的墨粉,墨粉由以下具体成分组成：树脂、颜料、抗氧剂、界面相容剂、表面改性剂、干燥剂、电荷调节剂、蜡以及表面添加剂,其中,墨粉成分的具体重量份数为：树脂70-95份,颜料1-10份,抗氧剂0.1-5份,界面相容剂0.1-5份,表面改性剂0.1-5份,干燥剂0.1-1份,电荷调节剂0.5-5份,蜡1-10份以及表面添加剂1-5份。同时还披露了一种可耐潮湿生产和保存的墨粉的制备方法。本发明可有效地避免墨粉在存储过程中发生氧化反应,相应地延长墨粉的保存期限,同时,有效地避免了墨粉结节成块的发生,墨粉颗粒的大小和分布集中,粒径大多是在7-10微米的区间,配合相应的包装,可以绝大部分避免湿度对墨粉保存的影响,降低了废料率。(The invention discloses a toner capable of resisting moisture production and preservation, which comprises the following specific components: the ink powder comprises resin, pigment, antioxidant, interfacial compatilizer, surface modifier, drying agent, charge regulator, wax and surface additive, wherein the ink powder comprises the following components in parts by weight: 70-95 parts of resin, 1-10 parts of pigment, 0.1-5 parts of antioxidant, 0.1-5 parts of interfacial compatilizer, 0.1-5 parts of surface modifier, 0.1-1 part of drying agent, 0.5-5 parts of charge regulator, 1-10 parts of wax and 1-5 parts of surface additive. Also disclosed is a method for producing a toner that is moisture resistant and can be produced and stored. The invention can effectively avoid the oxidation reaction of the powdered ink in the storage process, correspondingly prolong the storage life of the powdered ink, and simultaneously effectively avoid the agglomeration of powdered ink, the size and the distribution of powdered ink particles are concentrated, the particle size is mostly in the range of 7-10 microns, and the influence of humidity on the storage of the powdered ink can be mostly avoided by matching with corresponding packages, thereby reducing the waste rate.)

1. A toner that can be produced and stored resistant to moisture, characterized in that: the toner is composed of the following specific components: the toner comprises resin, a pigment, an antioxidant, an interfacial compatilizer, a surface modifier, a drying agent, a charge regulator, wax and a surface additive, wherein the toner comprises the following components in parts by weight: 70-95 parts of resin, 1-10 parts of pigment, 0.1-5 parts of antioxidant, 0.1-5 parts of interfacial compatilizer, 0.1-5 parts of surface modifier, 0.1-1 part of drying agent, 0.5-5 parts of charge regulator, 1-10 parts of wax and 1-5 parts of surface additive.

2. A moisture-resistant toner as claimed in claim 1, characterized in that: the toner is composed of the following components in parts by weight: 80 parts of resin, 3 parts of pigment, 2 parts of antioxidant, 2 parts of interfacial compatilizer, 1 part of surface modifier, 0.5 part of drying agent, 2.5 parts of charge regulator, 6 parts of wax and 3 parts of surface additive.

3. A moisture-resistant toner as claimed in claim 1, characterized in that: the resin is one or more of a copolymer of a styrene monomer and acrylic ester, a copolymer of a styrene monomer and methacrylic ester, a vinyl polymer and a copolymer thereof, a styrene copolymer, polyvinyl ether, polyvinyl ketone, polyether amine, polyurethane, rubbers, epoxy resin, polyvinyl butyral rosin, modified rosin, phenolic resin and polyester (saturated polyester resin, unsaturated polyester resin and styrene-acrylic-polyester copolymerized resin).

4. A moisture-resistant toner as claimed in claim 1, characterized in that: the antioxidant is as follows: 2, 6-tertiary butyl-4-methylphenol, bis (3, 5-tertiary butyl-4-hydroxyphenyl) thioether and/or pentaerythritol tetrakis [ beta- (3, 5-tertiary butyl-4-hydroxyphenyl) propionate ].

5. A moisture-resistant toner as claimed in claim 1, characterized in that: the interfacial compatilizer is one or more of maleic anhydride grafted polylactic acid, maleic anhydride grafted polybutylene succinate and maleic anhydride grafted polyhydroxyalkanoate.

6. A moisture-resistant toner as claimed in claim 1, characterized in that: the surface modifier is one or more of silane coupling agent (aminosilane coupling agent KH-550, epoxy silane coupling agent KH-560 or azido silane coupling agent S-3046)), titanate coupling agent and stearic acid.

7. A moisture-resistant toner as claimed in claim 1, characterized in that: the desiccant is one or more of silica gel desiccant, mineral desiccant, montmorillonite desiccant and calcium chloride desiccant.

8. A moisture-resistant toner as claimed in claim 1, characterized in that: the charge-regulating agent is an electronegative CCA and an electropositive CCA, wherein the electronegative CCA comprises: electronegative polymers, metal salicylic acid complexes, monoazo metal complexes or chelates, and organic metal complexes of aromatic hydroxycarboxylic acids or aromatic dicarboxylic acids; an electropositive CCA includes: fatty acid metal salts, tributylbenzylammonium-1-hydroxy-4-naphthol sulfonate, tetrabutylammonium tetrafluoroborate, styrene-acrylic acid-methacrylate copolymer resins, and electropositive polymers.

9. A method for producing a moisture-resistant toner according to any one of claims 1 to 8, comprising: the method is characterized in that: the preparation method comprises the following specific steps:

the method comprises the following steps: drying air, wherein the external air is pretreated by sucking air through an air compressor provided with a drying agent to obtain the dried air;

step two: premixing, namely uniformly mixing the resin, the antioxidant, the charge regulator, the wax and the pigment in parts by a mixer to obtain a premix;

step three: extruding, namely melting and mixing the premix obtained in the step two through a mixing roll, extruding and cooling to obtain a cooling tablet;

step four: grinding, namely crushing the cooled tablets obtained in the step three by using mechanical crushing equipment to obtain coarse particle crushed materials, and then carrying out jet milling and grinding on the coarse particle crushed materials and grading to finally obtain intermediate products;

step five: after-mixing, adding the intermediate product obtained in the step four into an interface compatilizer and a surface modifier for interface modification treatment to obtain a modified intermediate product;

step six: and D, finishing, namely adding a surface additive into the modified intermediate product obtained in the step five, and processing to obtain the finished product of the ink powder.

10. The method for producing a moisture-resistant toner capable of being produced and stored according to claim 9, characterized in that: the humidity of the dry air obtained in the first step is kept below 50%.

Technical Field

The invention relates to the field of production and preparation of ink powder for laser printers and digital copiers, in particular to ink powder capable of resisting moisture production and storage and a preparation method thereof.

Background

Most of the existing physical manufacturing processes of the toner need to use an air compressor, so the whole production and manufacturing process of the toner is extremely easily influenced by the humidity of the air. When the humidity in the air is more than 60%, the air compressor can bring the moisture in the air into the production equipment, and the water molecules are fused with the resin powder in the raw material of the ink powder, so that the phenomenon of agglomeration of the ink powder in the production process is caused frequently, the storage difficulty is high, the storage cost is also increased, the output rate of the ink powder is seriously influenced, and the waste powder rate is high.

The conventional solution is to equip a constant temperature and humidity workshop and a warehouse, but the conventional solution is separated from a factory area, and a client cannot be guaranteed to provide a corresponding environment. On the other hand, the constant temperature and humidity workshop and warehouse are deployed and used, so that the production cost is increased, and the benefit of an enterprise is influenced.

Therefore, the toner capable of being produced and stored in a moisture-resistant manner and the preparation method thereof are developed in the technical scheme, and the toner prepared by the preparation method does not need to depend on the constant-temperature and constant-humidity environment of a workshop in the production and storage processes, so that the problem of nodule and blocking is not easy to occur. The produced ink powder has concentrated particle size and distribution, the particle size is mostly in the range of 7-10 microns, and the influence of humidity on the storage of the ink powder can be mostly avoided by matching with corresponding packages, so that the quality guarantee period of the ink powder is greatly prolonged, and the ink powder is particularly suitable for the manufacture of the ink powder which has long product logistics period and needs to be stored for a long time.

Disclosure of Invention

The invention discloses a toner capable of resisting moisture production and preservation and a preparation method thereof, and mainly aims to overcome the defects and shortcomings in the prior art.

The technical scheme adopted by the invention is as follows:

a moisture-resistant toner that can be produced and stored, the toner being composed of the following specific components: the toner comprises resin, a pigment, an antioxidant, an interfacial compatilizer, a surface modifier, a drying agent, a charge regulator, wax and a surface additive, wherein the toner comprises the following components in parts by weight: 70-95 parts of resin, 1-10 parts of pigment, 0.1-5 parts of antioxidant, 0.1-5 parts of interfacial compatilizer, 0.1-5 parts of surface modifier, 0.1-1 part of drying agent, 0.5-5 parts of charge regulator, 1-10 parts of wax and 1-5 parts of surface additive.

Further, the toner is composed of the following components in parts by weight: 80 parts of resin, 3 parts of pigment, 2 parts of antioxidant, 2 parts of interfacial compatilizer, 1 part of surface modifier, 0.5 part of drying agent, 2.5 parts of charge regulator, 6 parts of wax and 3 parts of surface additive.

Furthermore, the resin is one or more of a copolymer of a styrene monomer and acrylic ester, a copolymer of a styrene monomer and methacrylic ester, a vinyl polymer and a copolymer thereof, a styrene copolymer, polyvinyl ether, polyvinyl ketone, polyether amine, polyurethane, rubbers, epoxy resin, polyvinyl butyral rosin, modified rosin, phenolic resin and polyester (saturated polyester resin, unsaturated polyester resin and styrene-acrylic-polyester copolymerized resin).

Further, the antioxidant is: 2, 6-tertiary butyl-4-methylphenol, bis (3, 5-tertiary butyl-4-hydroxyphenyl) thioether and/or pentaerythritol tetrakis [ beta- (3, 5-tertiary butyl-4-hydroxyphenyl) propionate ].

Furthermore, the interfacial compatilizer is one or more of maleic anhydride grafted polylactic acid, maleic anhydride grafted polybutylene succinate and maleic anhydride grafted polyhydroxyalkanoate.

Furthermore, the surface modifier is one or more of a silane coupling agent (an aminosilane coupling agent KH-550, an epoxy silane coupling agent KH-560 or an azido silane coupling agent S-3046)), a titanate coupling agent and stearic acid.

Furthermore, the drying agent is one or more of silica gel drying agent, mineral drying agent, montmorillonite drying agent and calcium chloride drying agent.

Still further, the charge-regulating agents are an electronegative CCA and an electropositive CCA, wherein electronegative CCA comprises: electronegative polymers, metal salicylic acid complexes, monoazo metal complexes or chelates, and organic metal complexes of aromatic hydroxycarboxylic acids or aromatic dicarboxylic acids; an electropositive CCA includes: fatty acid metal salts, tributylbenzylammonium-1-hydroxy-4-naphthol sulfonate, tetrabutylammonium tetrafluoroborate, styrene-acrylic acid-methacrylate copolymer resins, and electropositive polymers.

Further, the wax is one or more of hydrocarbon waxes such as polypropylene wax, polyethylene wax, maleic anhydride-modified polyethylene wax, copolymerized olefin wax, Fischer-Tropsch wax, paraffin wax, oxidized paraffin wax, and microcrystalline wax, ester waxes such as behenic acid behenate, stearyl stearate, carnauba wax, montanic acid ester wax, and pentaerythritol stearate, and higher fatty acid amide waxes such as oleic acid amide and stearic acid amide.

Still further, the external additive is one or more of fumed silica, titanium dioxide, metal oxides (alumina, zinc oxide, cerium oxide, etc.), titanates, metal stearates, polymer particles.

Still further, the pigment is an inorganic pigment or an organic pigment, or a combination of both.

A method for preparing ink powder which can resist moisture production and storage comprises the following steps: the preparation method comprises the following specific steps:

the method comprises the following steps: drying air, wherein the external air is pretreated by sucking air through an air compressor provided with a drying agent to obtain the dried air;

step two: premixing, namely uniformly mixing the resin, the antioxidant, the charge regulator, the wax and the pigment in parts by a mixer to obtain a premix;

step three: extruding, namely melting and mixing the premix obtained in the step two through a mixing roll, extruding and cooling to obtain a cooling tablet;

step four: grinding, namely crushing the cooled tablets obtained in the step three by using mechanical crushing equipment to obtain coarse particle crushed materials, and then carrying out jet milling and grinding on the coarse particle crushed materials and grading to finally obtain intermediate products;

step five: after-mixing, adding the intermediate product obtained in the step four into an interface compatilizer and a surface modifier for interface modification treatment to obtain a modified intermediate product;

step six: and D, finishing, namely adding a surface additive into the modified intermediate product obtained in the step five, and processing to obtain the finished product of the ink powder.

Further, the humidity of the dry air obtained in the first step is kept below 50%.

As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:

1. the antioxidant is added into the components of the powdered ink, so that the powdered ink can be effectively prevented from undergoing oxidation reaction in the storage process, and the storage life of the powdered ink is correspondingly prolonged; meanwhile, by adding the interface compatilizer and the surface modifier, the produced intermediate product is modified, so that the interface compatibility between the ink powder and paper fibers is improved, the combination firmness of the ink powder and the paper is improved, and the oxidation and the falling off of the writing ink powder are delayed.

2. In the process of preparing the ink powder, the drying agent is added, and the drying agent is used for drying and pretreating the air of the air compressor, so that the humidity of the sucked air is effectively ensured, the air humidity is kept below 50%, the agglomeration of ink powder nodules is effectively avoided, the size and the distribution of particles of the produced ink powder are concentrated, the particle size is mostly in the range of 7-10 micrometers, the influence of the humidity on the storage of the ink powder can be mostly avoided by matching with corresponding packages, and the waste rate is reduced.

Drawings

FIG. 1 is a production flow chart of a toner production method of the present invention.

Detailed Description

Embodiments of the present invention will be further described with reference to the accompanying drawings.

Example one

A moisture-resistant toner that can be produced and stored, the toner being composed of the following specific components: the toner comprises resin, a pigment, an antioxidant, an interfacial compatilizer, a surface modifier, a drying agent, a charge regulator, wax and a surface additive, wherein the toner comprises the following components in parts by weight:

80 parts of resin, 3 parts of pigment, 2 parts of antioxidant, 2 parts of interfacial compatilizer, 1 part of surface modifier, 0.5 part of drying agent, 2.5 parts of charge regulator, 6 parts of wax and 3 parts of surface additive.

Furthermore, the resin is one or more of a copolymer of a styrene monomer and acrylic ester, a copolymer of a styrene monomer and methacrylic ester, a vinyl polymer and a copolymer thereof, a styrene copolymer, polyvinyl ether, polyvinyl ketone, polyether amine, polyurethane, rubbers, epoxy resin, polyvinyl butyral rosin, modified rosin, phenolic resin and polyester (saturated polyester resin, unsaturated polyester resin and styrene-acrylic-polyester copolymerized resin).

Further, the antioxidant is: 2, 6-tertiary butyl-4-methylphenol, bis (3, 5-tertiary butyl-4-hydroxyphenyl) thioether and/or pentaerythritol tetrakis [ beta- (3, 5-tertiary butyl-4-hydroxyphenyl) propionate ].

Furthermore, the interfacial compatilizer is one or more of maleic anhydride grafted polylactic acid, maleic anhydride grafted polybutylene succinate and maleic anhydride grafted polyhydroxyalkanoate.

Furthermore, the surface modifier is one or more of a silane coupling agent (an aminosilane coupling agent KH-550, an epoxy silane coupling agent KH-560 or an azido silane coupling agent S-3046)), a titanate coupling agent and stearic acid.

Furthermore, the drying agent is one or more of silica gel drying agent, mineral drying agent, montmorillonite drying agent and calcium chloride drying agent.

Still further, the charge-regulating agents are an electronegative CCA and an electropositive CCA, wherein electronegative CCA comprises: electronegative polymers, metal salicylic acid complexes, monoazo metal complexes or chelates, and organic metal complexes of aromatic hydroxycarboxylic acids or aromatic dicarboxylic acids; an electropositive CCA includes: fatty acid metal salts, tributylbenzylammonium-1-hydroxy-4-naphthol sulfonate, tetrabutylammonium tetrafluoroborate, styrene-acrylic acid-methacrylate copolymer resins, and electropositive polymers.

Further, the wax is one or more of hydrocarbon waxes such as polypropylene wax, polyethylene wax, maleic anhydride-modified polyethylene wax, copolymerized olefin wax, Fischer-Tropsch wax, paraffin wax, oxidized paraffin wax, and microcrystalline wax, ester waxes such as behenic acid behenate, stearyl stearate, carnauba wax, montanic acid ester wax, and pentaerythritol stearate, and higher fatty acid amide waxes such as oleic acid amide and stearic acid amide.

Still further, the external additive is one or more of fumed silica, titanium dioxide, metal oxides (alumina, zinc oxide, cerium oxide, etc.), titanates, metal stearates, polymer particles.

Still further, the pigment is an inorganic pigment or an organic pigment, or a combination of both.

As shown in fig. 1, a method for producing a toner that can be produced and stored with resistance to humidity: the preparation method comprises the following specific steps:

the method comprises the following steps: drying air, wherein the external air is pretreated by sucking air through an air compressor provided with a drying agent to obtain the dried air;

step two: premixing, namely uniformly mixing the resin, the antioxidant, the charge regulator, the wax and the pigment in parts by a mixer to obtain a premix;

step three: extruding, namely melting and mixing the premix obtained in the step two through a mixing roll, extruding and cooling to obtain a cooling tablet;

step four: grinding, namely crushing the cooled tablets obtained in the step three by using mechanical crushing equipment to obtain coarse particle crushed materials, and then carrying out jet milling and grinding on the coarse particle crushed materials and grading to finally obtain intermediate products;

step five: after-mixing, adding the intermediate product obtained in the step four into an interface compatilizer and a surface modifier for interface modification treatment to obtain a modified intermediate product;

step six: and D, finishing, namely adding a surface additive into the modified intermediate product obtained in the step five, and processing to obtain the finished product of the ink powder.

Further, the humidity of the dry air obtained in the first step is kept below 50%.

Example two

The difference between this embodiment and the first embodiment is: the toner of the embodiment comprises the following components in parts by weight: 70 parts of resin, 3 parts of pigment, 3 parts of antioxidant, 3 parts of interfacial compatilizer, 4 parts of surface modifier, 1 part of drying agent, 5 parts of charge regulator, 8 parts of wax and 3 parts of surface additive. Other preparation methods are the same as the first example, and are not repeated here.

EXAMPLE III

The difference between this embodiment and the first embodiment is: the specific weight fractions of the toner components of the embodiment are as follows: 95 parts of resin, 1 part of pigment, 0.1 part of antioxidant, 0.1 part of interfacial compatilizer, 0.1 part of surface modifier, 0.1 part of drying agent, 0.6 part of charge regulator, 2 parts of wax and 1 part of surface additive. Other preparation methods are the same as the first example, and are not repeated here.

Comparative examples

There are commercially available ordinary printing toners which are not subjected to modification treatment of an intermediate product nor air drying treatment.

And (3) performance comparison: as shown in table 1 below:

item	Particle distribution	Interval of particle size	Whether or not there is a block
				Example one	Centralizing	7-10 microns	Is free of
Example two	Centralizing	7-10 microns	Is free of
				EXAMPLE III	Centralizing	7-10 microns	Is free of
Comparative examples	Dispersing	10-25 microns	Is provided with

TABLE 1

As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:

1. the antioxidant is added into the components of the powdered ink, so that the powdered ink can be effectively prevented from undergoing oxidation reaction in the storage process, and the storage life of the powdered ink is correspondingly prolonged; meanwhile, by adding the interface compatilizer and the surface modifier, the produced intermediate product is modified, so that the interface compatibility between the ink powder and paper fibers is improved, the combination firmness of the ink powder and the paper is improved, and the oxidation and the falling off of the writing ink powder are delayed.

2. In the process of preparing the ink powder, the drying agent is added, and the drying agent is used for drying and pretreating the air of the air compressor, so that the humidity of the sucked air is effectively ensured, the humidity of the air is kept below 50%, the occurrence of agglomeration of ink powder nodules is effectively avoided, and the waste rate is reduced.

The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications of the present invention using this concept shall fall within the scope of infringing the present invention.